ICL8105XUMA2 - INFINEON TECHNOLOGIES AG

2016-08-01 1 Rev. 2.0

ICL8105 - Digital Flyback Controller IC

XDP™ digital power

Datasheet

About this document

Scope and purpose

This document contains information about Infineon high-performance single-stage digital flyback controller

ICL8105 for LED lighting applications. Features and electrical characteristics are listed and explained.

Intended audience

This document is intended for customers wishing to design high-performance single-stage digital flyback AC-

DC converters for LED lighting based on the ICL8105 controller

ICL8105 - Digital Flyback Controller IC

Datasheet

Datasheet 2 Rev. 2.0

2016-08-01

Revision History

Page or Item Subjects (major changes since previous revision)

Rev. 2.0, 2016-08-01

Cover page Change “.dp digital power 2.0” to “XDP™ digital power”.

Page 4 & 5 Added product highlight & schematic for primary side micro-controller dimming

application.Updated schematic for secondary side 0-10V dimming application from using

dimming transformer to CDM10V.

Page 6 Updated pin SQW, ZCD definition and function in Table 2.

Page 7 Updated Section 2.1 to introduce “ICL8105 supports primary side micro-controller

dimming application”

Section 2.2.4 Updated Figure 9 and description for parameter naming correction from I_out_min to

I_out_dim_min. Added note to indicate V_dim_max is fixed at 1.72V.

Section 2.2.5 Updated description and figure for isolated dimming interface circuitry from using

dimming transformer to CDM10V

Section 2.2.6 Updated section title from “output voltage” to “ output load voltage”. Added description to

indicate wide output load voltage range condition (more than 2 times of the minimum

output load voltage)

Section 2.2.7 Updated application note description forthe auto-discharge circuit reference.

Section 2.2.9 Added footnote for parameter n_ss

Section 2.3 Tabled 4: Changed UVLO protection reaction from “auto-restart” to “hardware restart” and

added note for VCC overvoltage protection reaction to indicate it is configurable. Added

startup output undervoltage protection for Vout. Updated Section 2.3.3 description.

Section 2.4.1 Added description about ICL8105 excel tool and changed description from 40W form factor

board to 40W reference design with CDM10V

Section 2.4.2 Updated example value and configuration range of parameters in Table 5. Moved

t_min_demag from fine-tuning section to multimode section in Table 5. Moved parameter

Reaction_VCCP, a_DIM, N_DCM_MOD_GAIN, V_DIM_MIN & V_DIM_OFF,from Table 6 to Table 5, Moved

parameter V_outUV from Table 5 to Table 6, Changed parameter V_GD value (from 9V to 10.5V),

Changed parameter naming from EN_STOP to Debug_mode. Added parameter f_DCM_init and

remove parameter EN_EPFC. Added selection of “Narrow_24.9V” for parameter VCC_SUPPLY.

Page 24 Added section 2.4.3 about “Debug mode support”.

Table 10 Added row with Ta(max) =105 °C, Tj(max) =150 °C, Added note of Ta(max), Tj(max) limit

based on f_sw_max setting

Table 11 Added row with tMCLK(typ) = 20.9ns, Added note of tMCLK(typ) selection based on f_sw_max

Table 15 Added V_OCP1 tolerance based on lower V_OCP1 setting range. Added V_OCP2 selection of

0.6V and changed the range of V_OCP1 in the note for V_OCP2 selection

Table 16 Changed V_GD typical value from 9.0V to 10.5V

Revision History

ICL8105 - Digital Flyback Controller IC

Datasheet

Datasheet 3 Rev. 2.0

2016-08-01

Table of Contents

About this document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1 Pin configuration and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Controller features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2.1 Primary side voltage and current sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.1.1 Input current sensing via pin CS and output current calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.1.2 Input voltage sensing via pin ZCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.1.3 Output voltage sensing via pin ZCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.2 Primary side control scheme for output current control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.2.3 Power factor correction (PFC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.2.4 Dimming via pin DIM/UART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.2.5 Isolated dimming interface with CDM10V (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.2.6 Wide output load voltage range circuit (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.2.7 Automatic output discharge circuit (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.2.8 VCC startup function combined with direct input monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.2.9 Configurable soft start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.2.10 Configurable gate voltage rising slope at pin GD (Lower EMI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.3 Protection features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.3.1 Undervoltage lockout for VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.3.2 Overvoltage protection for VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.3.3 Over / undervoltage protection for output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.3.4 Over / undervoltage protection for input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.3.5 Input overcurrent detection level 1 (OCP1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.3.6 Input overcurrent protection level 2 (OCP2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.3.7 Output overcurrent protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.3.8 Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.3.9 Firmware protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.4 Configuration and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.4.1 Configuration procedure and design-in support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.4.2 Overview configurable parameters and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.4.3 Debug mode support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.1 Package Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.2 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.3 Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.4 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4 Outline dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

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ICL8105 - Digital Flyback Controller IC

Datasheet

Overview

Product highlights

• Highly accurate primary side controlled output current (Line/load regulation typical within +/- 3%)

• High power quality (typical PF up to 0.99 and THD < 10%)

• High Efficiency (up to 91%)

• Configurable output current with no BOM change

• Supports universal input voltage (85 – 305 V AC)

• Supports wide output load voltage (up to 4 times of minimum output load voltage)

• Ideal for application with dimming signal from micro-controller on primary side

• Supports fully isolated 0 – 10 V dimming with Infineon CDM10V

• Supports low output current dimming.

• Low standby power

Features

• Single stage QR Flyback with PFC and high precision primary side controlled constant current output

• Excellent line and load regulation

• Supports AC input (45 ~ 65 Hz) and/or DC input voltage operation

• Integrated 600 V startup cell

• Low Bill Of Material (BOM)

• Configurable parameters, e.g. adjustable voltage and current ranges, protection modes

• Supports non-dimmed and/or dimmed applications.

• Intelligent thermal management with adaptive thermal protection

Applications

• Electronic control gear for LED luminaires (5 W to 80 W)

Description

The ICL8105 is a high performance microcontroller-based digital single-stage flyback controller with power

factor correction (PFC) for constant output current applications. The IC is available in a DSO-8 package and

supports a wide feature set, requiring a minimum of external components. The digital engine offers the

possibility to configure operational parameters and protection modes, which helps to ease the design phase

and allows a reduced number of hardware variants in production. Accurate primary side output current

control is implemented to eliminate the need for secondary side feedback circuitry.

Table 1

Product Type Package

ICL8105 PG-DSO-8

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Datasheet

Figure 1 Typical application 1 (Primary side micro-controller dimming)

Figure 2 Typical application 2 (Secondary side 0-10V dimming)

85 ...305 V AC

VCC

Internal

temperature

sensor

Zero crossing

detection

Startup cell

control PWM

Current

sensing

Dimming /

UART

GND

ZCD

ICL8105

Square wave

generator

SQW

Parameters

Configuration

DIM/UART

Output

Primary side

Micro-controller

PWM

Dimming

signal

RC Low

Pass Filter

85 ...305 V AC

VCC

Internal

temperature

sensor

Zero crossing

detection

Startup cell

control PWM

Current

sensing

Dimming /

UART

GND

ZCD

ICL8105

Square wave

generator

SQW

Parameters

Configuration

DIM/UART

0–10V

input

Output

Isolated Dimming

Circuit with CDM10V

CDM10V

Digital to

Analog

conversion

Vcc

Rdim+

Iout

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Pin configuration and description

1 Pin configuration and description

The pin configuration is shown in Figure 3. The pin functions are listed and described in Table 2.

Figure 3 Pin configuration

Table 2 Pin definitions and functions

Symbol Pin Type Function

ZCD 1 I Zero crossing detection

Pin ZCD is connected to an auxiliary winding via the resistor divider for zero

crossing detection. Output & input voltage are also measured with the

sampled positive & negative voltage sensing.

DIM/UART 2 I/O Dimming / UART

Shared functioning pin with either as dimming Input or UART configuration.

The dimming input voltage, VDIM sensing range is from 0.1 to 2V. Once the pin

voltage exceeds 2.2V (for example when the isolated USB interface board is

connected to the IC), this pin will function as UART configuration and the IC

will stay in non-dimming operation unless it is reset or restarted.

CS 3 I Current sense

Pin CS is connected to an external shunt resistor and the source of the power

MOSFET.

GD 4 O Gate driver

Output signal to drive an external power MOSFET.

HV 5 I High voltage

Pin HV is connected to the rectified input voltage via external resistor. An

internal 600 V HV startup-cell is used to pre-charge VCC for IC startup once the

mains input voltage is applied. Furthermore sampled high voltage sensing is

used for synchronization with the input voltage frequency.

SQW 6 O Square wave generator

Pin SQW is capable of providing a square wave signal for driving the isolated

dimming transformer circuit, if necessary. Otherwise, this signal can be

turned off by configuration.

VCC 7 I Voltage supply

IC power supply

GND 8 — Power and signal ground

SQW

ZCD

VCC

GND

PG-DSO-8 (150mil)

DIM/UART

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ICL8105 - Digital Flyback Controller IC
Datasheet
Functional description
2 Functional description
The functional description provides an overview about the integrated functions and features as well as their
relationship. The mentioned parameters and equations are based on typical values at TA = 25 °C. The
corresponding min. and max. values are shown in the electrical characteristics.
2.1 Introduction
The ICL8105 is a digital AC/DC flyback controller with Power Factor Correction (PFC). The PFC function enables
a rectified sinusoidal input current waveform with a power factor typically up to 0.99 and THD < 10% for a wide
range of operating conditions. ICL8105 provides primary side constant output current control that avoids the
secondary side control feedback loop circuitry usually needed in isolated power converters. This approach
supports a low part count that is necessary to build up the application. ICL8105 has multi-mode operations
and it selects the best mode of operation based on operating conditions. The multi-mode operation will
automatically switch between quasi-resonant mode (QRM) and discontinuous mode (DCM) and active burst
mode (ABM). In addition, ICL8105 supports both secondary side 0 - 10 V dimming and primary side micro-
controller dimming application. Digital and RF interfaces can be supported by a microcontroller using a
digital-to-analog converter.
The ICL8105 provides a high flexibility in the design-in of the application. A graphic user interface (GUI) tool
supports users to tune a set of configurable parameters. The configuration can be done via a single pin UART
interface at pin DIM/UART.
2.2 Controller features
Table 3 gives an overview about the controller features that are described in the mentioned chapters.
Table 3   Controller features
Primary side voltage and current sensing Chapter 2.2.1
Primary side control scheme for output current control Chapter 2.2.2
Power factor correction (PFC) Chapter 2.2.3
Dimming via pin DIM/UART Chapter 2.2.4
Isolated dimming interface with CDM10V (optional) Chapter 2.2.5
Wide output load voltage range circuit (optional) Chapter 2.2.6
Automatic output discharge circuit (optional) Chapter 2.2.7
VCC startup function combined with direct input monitoring Chapter 2.2.8
Configurable soft start Chapter 2.2.9
Configurable gate voltage rising slope at pin GD (Lower EMI) Chapter 2.2.10

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Datasheet

Functional description

2.2.1 Primary side voltage and current sensing

The ICL8105 provides a primary side control of the output current by means of measuring the input peak

current and measuring the conduction period of the output diode. Input and output voltages are measured at

pin ZCD using an external resistor divider and an auxiliary winding of the transformer. The voltage signal VAUX

contains the information of the rectified input voltage Vin and the output voltage Vout at the secondary side.

Figure 4 shows typical current and voltage waveforms of the Quasi-Resonant flyback application.

The following topics are described:

• Input current sensing via pin CS and output current calculation (Chapter 2.2.1.1)

• Input voltage sensing via pin ZCD (Chapter 2.2.1.2)

• Output voltage sensing via pin ZCD (Chapter 2.2.1.3)

Figure 4 Typical waveforms (Example with QRM valley switching)

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Datasheet

Functional description

2.2.1.1 Input current sensing via pin CS and output current calculation

The output current Iout is determined by the primary input peak current Ip,pk which is sensed at pin CS at time

tsample1, by the duration of conduction of the output diode (tsample2 - tsample1) and by the switching period tperiod.

The result is used for the control loop and for output overcurrent protections (Chapter 2.3.7).

2.2.1.2 Input voltage sensing via pin ZCD

The input voltage is measured using current IIV at pin ZCD at time tsample1. As the voltage VAUX is a negative

voltage, pin ZCD is clamped to a fixed negative voltage VINPCLN (Figure 5). The negative current IIV (flowing out

of pin ZCD) is proportional to the input voltage. The monitored input voltage is used for input over- and

undervoltage protection (Chapter 2.3.4).

Figure 5 Input voltage sensing via pin ZCD

2.2.1.3 Output voltage sensing via pin ZCD

The output voltage is measured using voltage VZCDSH at pin ZCD at time tsample2 (Figure 6). The measured

voltage at pin ZCD and the dimensioning of the resistor divider are used to calculate the reflected output

voltage Vout,aux at the auxiliary winding. Vout,aux is used for output over- and undervoltage protection

(Chapter 2.3.3). The relation between VCC and ZCD can be decoupled by adding a regulator for VCC

(Chapter 2.2.6).

Figure 6 Output voltage sensing via pin ZCD

Note: Please note that the time (tsample2 - tsample1) has to be longer than 2.0 µs to ensure that the reflected output

voltage can be correctly sensed at pin ZCD!

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Functional description

2.2.2 Primary side control scheme for output current control

The basic control scheme for the primary side constant current control is shown in Figure 7.

Figure 7 Integrated PI control scheme for output current control

The sampled signal VCS at pin CS is used to estimate the output current Iout as described in Chapter 2.2.1.1.

The internal reference current I_out_set is weighted according to thermal management and dimming curve. The

average estimated output current is compared with the weighted reference current to generate an error

signal. The error signal is fed into a PI regulator to control the PWM at pin GD for the power MOSFET. The

coefficients of the PI regulator are configurable.

The PI regulator allows different modes of operation as shown in Figure 8:

•Quasi-resonant mode (QRM)

This mode controls the on-time and maximizes the efficiency by switching on at the 1st valley of the VAUX

signal. This ensures zero-current switching with a minimum of switching losses.

• Discontinuous mode (DCM)

This mode is used if the on-time cannot be reduced further in QRM while the output is being dimmed. The

controller will extend the switching period later than the 1st valley to control the output power.

• Active-Burst mode (ABM)

To extend the dimming range even further, ICL8105 features an ABM which is automatically aligned with

the input frequency to avoid any undesired effects like flicker or shimmer as well as to reduce any audible

noise.

The controller will autonomously select the best mode of operation based on operation conditions like input

voltage, input frequency and dimming input voltage which defines the output power.

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Functional description

Figure 8 Overview of operation modes

2.2.3 Power factor correction (PFC)

The gate driver GD is used for driving the power MOSFET of the flyback. Constant output current regulation

and a sinusoidally shaped input current are achieved by on-time control. The quasi-constant on-time ton

ensures high PF and low THD performance. The internal control signal ton is calculated by the digital engine so

that the output current is close to the target current (Chapter 2.2.2).

Optionally, an enhanced PFC (EPFC) scheme can be enabled to compensate the input current distortion

caused by the EMI filter1). In this scheme, the on-time is a function of the internal controller signal ton, the input

voltage Vin, output voltage Vout, output current Iout, phase angle and a configurable gain parameter (C_EMI)

optimizing the input current waveform (Chapter 2.4).

2.2.4 Dimming via pin DIM/UART

The voltage sensed at pin DIM/UART is used to determine the output current level. Figure 9 shows the relation

of DIM/UART voltage to the output current target value. Levels of V_DIM_min and V_DIM_max2) ensure that

minimum current I_out_dim_min and maximum current I_out_set can always be achieved, making the application

robust against dimmer and other component tolerances. The sampled voltage VDIM at pin DIM/UART is digitally

filtered to stabilize light output. The ICL8105 can also be configured to use a linear or a quadratic dimming

curve.

Figure 9 Dimming curves for pin DIM/UART

1) Patent pending

2) fixed at 1.72V

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Functional description

Optionally, The output current can be turned off completely when DIM/UART voltage is V_DIM_off or below.

Note: The dim-to-off feature requires an active voltage source to exit the dim-to-off state.

In some cases where the dimming control circuitry is on the primary side and it is using PWM control, please

refer ICL8105 design guide for the RC low pass filter circuit which will convert the PWM dimming signal to an

analog dimming voltage for measurement on pin DIM/UART.

2.2.5 Isolated dimming interface with CDM10V (optional)

Figure 10 shows an exemplary schematic of a 0-10V dimming interface for low BOM cost, using CDM10V by

Infineon. CDM10V is a fully integrated 0-10V dimming interface IC which transmits secondary side analog

voltage based signals from 0-10V dimmer to primary side, by driving an external opto-coupler with a 5mA

current based PWM signal. The secondary auxiliary winding is necessary to supply the operating voltage of

CDM10V. For more details about CDM10V, please visit Infineon website: http://www.infineon.com/cdm10v

Figure 10 Optional circuit for isolated dimming with CDM10V

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Functional description

2.2.6 Wide output load voltage range circuit (optional)

If wide output load voltage (more than 2 times of the minimum output load voltage) is required, a regulator

for VCC is required. This regulator limits the maximum voltage at pin VCC during steady state operation.

Figure 11 shows an exemplary schematic for the optional wide output voltage range support. A wide output

voltage range impacts efficiency due to the necessary voltage regulator for VCC.

Figure 11 Optional wide output voltage range circuit

2.2.7 Automatic output discharge circuit (optional)

In case of a fault (e.g. Open Load) the output capacitors stay charged and may keep a high voltage. It is

therefore recommended to add an automatic output discharge circuit. This circuit discharges the output

capacitors if the main switch stops switching. For the circuit design, please refer the schematic in the

application note of the ICL8105 40W reference design with CDM10V.

2.2.8 VCC startup function combined with direct input monitoring

There are two main functions supported at pin HV which needs to be connected to the input voltage via

resistor and two diodes.

The integrated HV startup-cell is switched on during the VCC startup phase before the IC is activated. Current

flows from pin HV to pin VCC via an internal diode, which charges the capacitor at pin VCC. Once the voltage

at pin VCC exceeds the VVCCon threshold, the IC enables the active operating phase and switches off the HV

startup-cell.

Furthermore, a direct input monitoring is supported that is controlled by an internal timer. The timer switches

on the HV startup cell for a very short time after a defined period. During this short on-time the current is

sensed at pin HV by a comparator to synchronize to frequency and phase of the input voltage.

2.2.9 Configurable soft start

After startup, the IC initiates a soft-start. During soft-start, the switching stress for the power MOSFET, diode

and transformer is minimized. The cycle-by-cycle current limit is increased in steps with a configurable time

t_ss for each step. The number of soft start steps is defined by parameter n_ss1). After the final CS limit level has

been reached, the output will be charged up with maximum on-time and maximum CS limitation level to the

minimum output voltage that ensures self-supply, V_out_start. After the minimum output voltage has been

reached, the current control loop (Chapter 2.2.2) takes over and output undervoltage protection is activated

(if enabled by configuration).

1) fixed at 3

VCCreg

VCC

VCCreg

GND

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Functional description

2.2.10 Configurable gate voltage rising slope at pin GD (Lower EMI)

The gate driver output signal can be configured with respect to the rising slope for switching on the power

MOSFET. This feature can save BOM components (1 diode & 1 resistor) which are conventionally added to

achieve the same purpose for EMI improvement. The maximum gate drive current I_GD_pk for the gate driver

slope can be set between 30 mA and 118 mA (Chapter 2.4). Figure 12 shows the gate driver output signal.

Figure 12 Configurable gate voltage rising slope for lower EMI

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Functional description
2.3 Protection features
Table 4 gives an overview about the available protection features and corresponding default actions in case
a protection feature is triggered. Two protection reactions (auto restart mode and latch mode) are
implemented.
Auto restart mode
Once the auto restart mode is activated, the IC stops the power MOSFET switching at pin GD and reduces the
current consumption to a minimum. After the configurable auto restart time t_auto_restart the IC initiates a new
start-up1). During this auto restart the HV startup-cell is switched on and off in order to keep the VCC between
VUVLO and VOVLO thresholds2). The auto restart cycle starts first with charging the VCC capacitor by means of
switching on the HV startup cell until the VVCCon threshold is exceeded. A regular startup procedure with soft
start is initiated afterwards.
Latch mode
When latch mode is activated, the power MOSFET switching at pin GD is immediately stopped. The HV startup-
cell is switched on and off in order to keep the VCC between VUVLO and VOVLO thresholds. The device stays in this
state until input voltage is completely removed and the VCC voltage drops below the VUVLO threshold. The IC
can then be re-started by applying input voltage.
1) After t_auto_restart, the VCC will be charged to VVCCon again(see Chapter 2.2.8). Therefore, the effective auto-restart time is longer 
than t_auto_restart 
2) This feature can be disabled for applications with externally supplied VCC.
Table 4   Protection Features
Protection Feature Active Period
(if enabled)
Reaction Description
Undervoltage lockout for VCC Always on Hardware restart Chapter 2.3.1
Overvoltage protection for VCC Always on Latch mode1)
1) Protection which its reaction can be configured to either auto restart mode or latch mode.
Chapter 2.3.2
Overvoltage protection for Vout Always on Auto restart1) Chapter 2.3.3
Undervoltage protection for Vout Activated after startup2)
2) Protection which can be disabled or enabled by configuration.
Auto restart Chapter 2.3.3
Startup Undervoltage protection for Vout During startup Auto restart Chapter 2.3.3
Overvoltage protection for Vin Always on2) Latch mode Chapter 2.3.4
Undervoltage protection for Vin Always on2) Auto restart Chapter 2.3.4
Input overcurrent detection level 1 Always on Current limiting Chapter 2.3.5
Input overcurrent protection level 2 Always on Latch mode Chapter 2.3.6
Output current protection (average) Activated after startup2) Auto restart Chapter 2.3.7
Output current protection (peak) Activated after startup2) Auto restart Chapter 2.3.7
Overtemperature protection Always on Latch mode Chapter 2.3.8
Firmware protections 
(1st Watchdog & RAM Parity)
Always on Auto restart Chapter 2.3.9

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Functional description

2.3.1 Undervoltage lockout for VCC

An undervoltage lockout unit (UVLO) is implemented which ensures a defined enabling and disabling of the IC

operation depending on the supply voltage at pin VCC. The UVLO contains a hysteresis with the voltage

thresholds VVCCon for enabling the IC and VUVOFF for disabling the IC. Once the mains input voltage is applied,

current flows through an external resistor into pin HV via the integrated diode to pin VCC. The IC is enabled

once VCC exceeds the threshold VVCCon and enters normal operation if no fault condition is detected. In this

phase VCC will drop until the self supply via the auxiliary winding takes over the supply at pin VCC. For proper

startup, the self supply via auxiliary winding must be in place before the timeout of t_start_max occurs (See

Chapter 2.3.3) or before VCC falls below VUVOFF threshold.

2.3.2 Overvoltage protection for VCC

Overvoltage detection at pin VCC is implemented via a threshold of V_VCC_max.

2.3.3 Over / undervoltage protection for output voltage

Overvoltage (e.g. Open Load) or undervoltage (e.g. Output short) detection of the output voltage Vout is

provided by the measurement and calculation as described in Chapter 2.2.1.3. The overvoltage detection

thresholds V_outOV is configurable while the undervoltage detection threshold V_outUV is fixed at 50% of the

configurable V_out_dim_min threshold. Output undervoltage protection is disabled during startup. For output

overvoltage protection in auto-restart reaction, either slow or fast auto-restart can be selected. The startup

threshold V_out_start has to be configured below the fully dimmed minimum output load voltage, V_out_dim_min.

Note: Please note that there are possibilities where critical protection like output over-voltage not working

properly (example: wrong parameter configurations loaded). Thus, please consider adding zener diode

or any voltage suppressor device/circuit on output for reinforced safety purpose.

Note: It is mandatory to have output discharge resistor/circuit which discharges the output capacitor after

triggering open load protection at V_outOV. Latch reaction is recommended for open load protection as

it can shut down the unit to prevent output overcharged if the discharge resistor ohmic value is too high.

In case of output short/under-voltage, the auxiliary winding cannot provide power to VCC during startup. Such

failure condition is detected if output voltage has not reached V_out_start before a timeout of t_start_max occurs

Figure 13 Voltage threshold for output over / undervoltage protection

2.3.4 Over / undervoltage protection for input voltage

An over / undervoltage detection of the input voltage Vin is provided by the measurement and calculation as

described in Chapter 2.2.1.2. Peak values of Vin are compared to the configurable internal input over /

undervoltage protection thresholds V_inOV and V_inUV (Chapter 2.4).

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Figure 14 shows an exemplary setting of both over- and undervoltage thresholds together with configurable

startup thresholds V_in_start_min and V_in_start_max to create hysteresis for flicker-free operation at auto-restart.

Figure 14 Voltage threshold for input over / undervoltage protection

2.3.5 Input overcurrent detection level 1 (OCP1)

The input overcurrent protection level 1 is performed by means of the cycle-by-cycle peak current limitation

to V_OCP1. A leading edge blanking, t_CSLEB prevents the IC from falsely switching off the power MOSFET due to

a leading edge spike.

2.3.6 Input overcurrent protection level 2 (OCP2)

The input overcurrent protection level 2 is meant for covering fault conditions like a short in the transformer

primary winding. In this case overcurrent protection level 1 will not limit properly the peak current due to the

very steep slope of the peak current. Once the threshold V_OCP2 is exceeded for longer than t_CSOCP2, the

protection is triggered.

2.3.7 Output overcurrent protections

The ICL8105 includes protections against exceeding an average and peak current limit. The average output

current is calculated over one half cycle of the input frequency to remove the output current ripple. With auto-

restart reaction, either slow auto-restart or fast auto-restart can be selected.

2.3.8 Overtemperature protection

ICL8105 offers a conventional as well as an adaptive overtemperature protection scheme using an internal

temperature sensor.

Note: Please note that the internal temperature sensor may not be able to sense and protect the temperature

of external components (e.g. power MOSFET, VCC regulator) without sufficient thermal coupling.

Conventional overtemperature protection

The overtemperature protection initiates a thermal shutdown once the internal temperature detection level

T_critical is reached. With latch mode protection, IC will turn off and only restart after recycling of input power.

At startup, junction temperature has to be below T_start.

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Figure 15 Conventional temperature protection

Adaptive temperature protection

To protect load and driver against overtemperature, ICL8105 features a reduction of output current below

maximum current I_out_set. As long as temperature T_hot is exceeded, the current is gradually reduced as shown

in Figure 16. If a reduction down to a minimum current I_out_red is not able to compensate the increase of

temperature, IC will turn off at temperature T_critical.

Figure 16 Adaptive temperature protection

2.3.9 Firmware protections

ICL8105 includes several protections to ensure the integrity and flow of the firmware:

• A hardware watchdog triggers a protection in case the firmware does not service the watchdog within a

defined time period.

• A RAM parity check triggers a protection in case a bit in the memory flips.

• A cyclic redundancy check (CRC) at each startup verifies the integrity of firmware and parameters.

• A first firmware watchdog triggers a protection if the ADC hardware cannot provide all necessary

information within a defined time period. This may occur if timing requirements for the ADC are exceeded.

• A second firmware watchdog triggers a protection if the execution of protection checks and the control

loop are not matching a defined time period. This may occur if timing requirements are exceeded (e.g.

operation beyond frequency limits).

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Functional description

2.4 Configuration and support

The configuration of ICL8105 is supported by the GUI tool .dp vision provided by Infineon. This chapter

describes the configuration procedure via the UART interface. Furthermore, it contains an overview about the

parameters and functions that can be configured.

2.4.1 Configuration procedure and design-in support

Figure 17 shows the setup for the configuration of ICL8105. The Infineon graphic user interface (GUI) .dpVision

connects to ICL8105 via the isolated USB interface board called .dp Interface Gen2. The .dp interface Gen 2

provides power via VCC to ICL8105 and connects via UART interface at pin DIM/UART. The common UART

interface enables communication with the IC even without the interactive GUI tool. This allows easy

configuration during mass production.

When VCC exceeds the VVCCon threshold, ICL8105 will sense pin DIM/UART for a UART connection. If power is

provided by VCC and no input voltage is applied at startup, ICL8105 will enter configuration mode. Also,

ICL8105 will enter configuration mode if no parameters have been programmed so far, regardless of input

voltage being applied or not.

Figure 17 Setup for configuration of the IC

For project development, a graphic user interface called .dp Vision guides the designer through the

configuration of parameters. Further information on .dp Vision can be found in the .dp Vision User Manual

provided by Infineon.

For production and end user configuration, a simpler graphic user interface called XDP™ GUI is also available.

The configurable parameters and configuration range of each parameter in the XDP™ GUI can be customized

using the XDP™ GUI Builder software provided by Infineon. Please refer the user manual of this GUI Builder for

more details.

The dimensioning of the application design(e.g. transformer design, BOM selection, IC parameterization) can

be done easily with an excel tool named ICL8105 system simulation & design creation tool. An ICL8105 40W

reference design with CDM10V is available from Infineon to demonstrate the features and performance. The

ICL8105 design guide presents the dimensioning process while the reference design application note presents

the board performance, fine tuning guide, debugging guide and frequently asked questions.

2.4.2 Overview configurable parameters and functions

The ICL8105 provides a generic firmware version that includes all configurable parameters set to zero. The

parameter values need to be specified by the user according to the target application. Table 5 lists the

configurable parameters. Table 6 lists the non configurable parameters which the values are constant or

adapted internally according to the configurable parameters settings.

Table 5 List of configurable parameters

Description Parameter Example Configuration Range

Hardware configuration

Iout set point (non-dimmed) I_out_set 880 mA Calculated by GUI

PC with

GUI tool

Isolated USB

interface

board

USB

VCC

GND

DIM/UART

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Transformer primary winding turns N_p 58 > 0

Transformer secondary winding turns N_s 15 > 0

Transformer auxiliary winding turns N_a 15 > 0

Transformer nominal primary Inductance L_p 0.544 mH Calculated by GUI

Current sense resistor R_CS 0.22 ohm Calculated by GUI

Pin CS OCP1 limitation threshold V_OCP1 0.49 V Calculated by GUI

Pin ZCD series resistor R_ZCD_1 56.2 kohm Calculated by GUI

Pin ZCD shunt resistor R_ZCD_2 2.00 kohm Calculated by GUI

Vcc Voltage Supply Type VCC_SUPPLY Wide [External, Narrow,

Narrow_24.9V, Wide]

Vcc capacitor total capacitance C_VCC 15.0 uF Calculated by GUI

Output capacitor maximum Voltage Rating V_out_cap_rating 63 V ≥ 0

Pin HV series resistor R_HV 66 kohm Calculated by GUI

Gate driver peak source current I_GD_pk 49 mA 30 mA to 118 mA (with few

mA change per step)

Protections

Auto restart time t_auto_restart 1 s 0.1 s to 25.5 s1)

Fast auto restart time t_auto_restart_fast 0.4 s 0.1 s to 25.5 s1)

Output OVP / Open Reaction Reaction_OVP_Vout Auto restart [Auto restart, Latch mode]

Auto restart speed for output OVP Speed_OVP_Vout Slow [Slow, Fast]

Output OVP threshold V_outOV 48.4 V V_out_dim_min to V_out_cap_rating

Enable output UVP / Short Protection EN_UVP_Vout Enabled [Enabled, Disabled]

Timeout for short detection at startup t_start_max 10.0 ms Calculated by GUI

Enable Maximum Average output OCP EN_Iout_max_avg Enabled [Enabled, Disabled]

Enable Maximum Peak output OCP EN_Iout_max_peak Enabled [Enabled, Disabled]

Maximum peak Output OCP threshold I_out_max_peak 1980 mA Calculated by GUI

Auto restart speed for output OCP Speed_OCP_Iout Slow [Slow, Fast]

Enable Input OVP EN_OVP_In Enabled [Enabled, Disabled]

Enable Input UVP EN_UVP_In Enabled [Enabled, Disabled]

Input OVP threshold V_inOV 329 Vrms2) Calculated by GUI

Maximum startup input voltage V_in_start_max 329 Vrms2) V_in_start_min to V_inOV

Minimum startup input voltage V_in_start_min 72 Vrms2) V_inUV to V_in_start_max

Input UVP threshold V_inUV 62 Vrms2) Calculated by GUI

Vcc OVP Reaction Reaction_VCCP Latch mode [Auto restart, Latch mode]

Enable Debug mode Debug_mode Disabled [Enabled, Disabled]

Temperature guard

Table 5 List of configurable parameters (cont’d)

Description Parameter Example Configuration Range

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Overtemperature detection threshold T_critical 119 °C 110°C to (TJ(max) - 6°C)

Enable adaptive temperature protection EN_ITP Enabled [Enabled, Disabled]

Temperature to start derating of Iout T_hot 110 °C 0 °C to T_critical

Minimum Iout for adaptive temperature

protection

I_out_red 220 mA 0 mA to I_out_set

Time step for each Iout derating t_step 10 s 2 s to 20 s

Startup & shutdown

Soft start timestep t_ss 0.5 ms Calculated by GUI

Minimum Vout when fully dimmed V_out_dim_min 11.9 V V_out_start to V_outOV

Vout to start constant current control loop V_out_start 9.5 V V_outUV to V_out_dim_min

Initial mode of operation control_loop_init DCM [ABM, DCM, QRM]

Initial DCM frequency at startup f_DCM_init 12 kHz f_sw_min_DCM to f_sw_max

Initial number of ABM pulses at startup N_ABM_init 100 Calculated by GUI

Control loop

QRM PI regulator proportional coefficient PI_KP_QRM 550 10 to 3000

QRM PI regulator integral coefficient PI_KI_QRM 8 1 to 1000

DCM PI regulator proportional coefficient PI_KP_DCM 17000 100 to 30000

DCM PI regulator integral coefficient PI_KI_DCM 200 10 to 10000

ABM PI regulator proportional coefficient PI_KP_ABM 64 1 to 600

ABM PI regulator proportional coefficient PI_KI_ABM 32 1 to 200

Dimming

Enable DImming EN_DIM Enabled [Enabled, Disabled]

Pin DIM/UART voltage for minimum Iout V_DIM_min 0.2 V V_DIM_off to V_DIM_max

Minimum Iout when fully dimmed I_out_dim_min 88 mA Calculated by GUI

Dimming curve shape C_DIM Quadratic [Linear, Quadratic]

Enable dim-to-off EN_DIM_TO_OFF Disabled [Enabled, Disabled]

Pin DIM/UART voltage for dim-to-off V_DIM_off 0.18 V 0.1 V to V_DIM_min

Enable Square Wave Output for pin SQW EN_SQW Disabled [Enabled, Disabled]

Multimode

Maximum switching frequency f_sw_max 180.8 kHz Calculated by GUI

Maximum on-time t_on_max 11.3 us Calculated by GUI

Minimum on-time t_on_min 1.1us 1 us to t_on_max

Minimum demagnetization time t_min_demag 3.0 us 2 us to 10 us

Minimum switching frequency in DCM f_sw_min_DCM 12 kHz 3 kHz to 20kHz

Enable Active Burst Mode EN_ABM Disabled [Enabled, Disabled]

Enhanced PFC

Table 5 List of configurable parameters (cont’d)

Description Parameter Example Configuration Range

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Enhanced PFC compensation gain C_EMI 0.1000 uF ≥ 0

Fine tuning

ZCD propagation delay compensation t_ZCDPD 410 ns 0 ns to 1000 ns

CS Propagation delay compensation t_PDC 200 ns 0 ns to 1000 ns

Transformer coupling T_coupling 1.020 0.000 to 2.000

Input voltage drop compensation R_in 11.9 ohm ≥ 0

Switching period modulation attenuation N_DCM_mod_gain 8 [0, 8, 16, 32]

Temperature compensation for VDIM a_DIM 0mV/K -8 mV/K to 8 mV/K

1) The auto-restart time has to be chosen sufficiently large enough to avoid a stepping up of the output voltage which

would exceed the output overvoltage level.

2) The input voltage levels refer to AC RMS voltage. If a programmed ICL8105 is operated with both AC or DC, the

threshold for DC input voltage is 1.41 times the threshold for AC RMS input voltage.

Table 6 List of non-configurable parameters

Description Parameter Value Notes

Hardware configuration

Transformer primary leakage inductance L_p_lk L_p * 1% uH

Output diode voltage drop V_out_diode_drop 0.7 V

Gate driver high voltage V_GD 10.5 V

Protections

Output UVP / Short Reaction Reaction_UVP_Vout Auto restart

Output UVP threshold (at steady state) V_outUV V_out_dim_min

*50% V

Steady state Output UVP blanking time t_Vout_blank 1ms

Maximum Average output OCP Reaction Reaction

_Iout_max_avg

Auto restart

Maximum Average Output OCP threshold I_out_max_avg I_out_set *

150% mA

Maximum Peak output OCP Reaction Reaction

_Iout_max_peak

Auto restart

Input OVP Reaction Reaction_OVP_Vin Latch mode

Input UVP Reaction Reaction_UVP_Vin Auto restart

Input OCP2 / Short Winding Reaction Reaction_OCP2 Latch mode

Vcc OVP Threshold V_VCC_max 24 V or 24.9V if VCC_SUPPLY = Narrow_24.9V,

24.9V. Otherwise, 24V

Hardware reaction for Firmware Protection

(Watchdog, RAM parity)

Reaction_HW Auto restart

Temperature guard

Overtemperature Reaction Reaction_TP Latch mode

Table 5 List of configurable parameters (cont’d)

Description Parameter Example Configuration Range

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Maximum startup temperature T_start T_hot -2°C or

T_critical -2°C

if EN_ITP = enabled, T_hot -2°C,

otherwise T_critical -2°C

Iout reduction in each derating step I_out_step I_out_set/80

Startup & shutdown

Number of soft start steps n_ss 3

Dimming

Pin DIM/UART voltage for maximum Iout V_DIM_max 1.72 V

Square-wave frequency for SQW pin f_SQW 160 kHz

Square-wave voltage for pin SQW V_SQW 7.5 V

Multimode

Minimum switching frequency in QRM f_sw_min_QRM 20 kHz

Enable DCM EN_DCM Enabled

Fine tuning

Spike blanking time for OCP2 trigger t_CSOCP2 240 ns

Leading edge blanking time t_CSLEB 480 ns

ZCD ringing suppression time t_ZCDring 1200 ns

Blanking time for CCM protection t_CCM 10 ms

Number of digital filter stages for VDIM N_DIM_Filter 6

Table 6 List of non-configurable parameters (cont’d)

Description Parameter Value Notes

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2.4.3 Debug mode support

If an unexpected system protection was triggered during testing, user can set parameter Debug_mode to

“Enabled”, which allows the firmware status code readout from the IC to debug which protection was

triggered.

For example in Figure 18, the firmware status code readout in the GUI shows a number of 0x0001 (in red

colour), which the description shows that the output over-voltage protection has been triggered. The

description of the status code will be shown automatically when the mouse pointer is hovered around the

status code.

Note: if there is no protection being triggered, the firmware status code should be 0x0000 (in black colour)

Figure 18 Firmware status code readout for debugging

Please kindly refer the application note for details on the necessary setup & procedures to read out the

firmware status code in debug mode.

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Electrical Characteristics

3 Electrical Characteristics

All signals are measured with respect to ground (pin 8). The voltage levels are valid if other ratings are not

violated.

3.1 Package Characteristics

3.2 Absolute Maximum Ratings

Absolute maximum ratings (Table 8) are defined as ratings which when being exceeded may lead to

destruction of the integrated circuit. Exposure to absolute maximum rating conditions for extended periods

may affect device reliability. Maximum ratings are absolute ratings; exceeding only one of these values may

cause irreversible damage to the integrated circuit. These values are not tested during production test.

Table 7 Package Characteristics

Parameter Symbol Limit Values Unit Remarks

min max

Thermal resistance from junction to

ambient

RthJA — 178 K/W PG-DSO-81)

1) JEDEC 1s0p at Pv = 140 mW

Table 8 Absolute Maximum Ratings

Parameter Symbol Limit Values Unit Remarks

min max

Voltage externally supplied at pin

VCC

VCC -0.5 26 V

Voltage at pin GD VGD -0.5 VCC + 0.3 V

Voltage at pin SQW VSQW -0.5 VCC + 0.3 V

Ambient temperature TA-40 85 °C 136.4kHz < f_sw_max ≤ 180.8kHz

-40 105 °C f_sw_max ≤ 136.4kHz

Junction temperature TJ-40 125 °C 136.4kHz < f_sw_max ≤ 180.8kHz

-40 1501) °C f_sw_max ≤ 136.4kHz

Storage temperature TS-55 150 °C

Soldering temperature TSold — 260 °C Wave soldering2)

ESD capability HBM VHBM — 2000 V Excluding pin HV3)

ESD capability HBM VHBM — 1500 V Pin HV3)

Voltage at pin ZCD VZCD -0.5 3.6 V

Voltage at pin CS VCS -0.5 3.6 V

Voltage at pin DIM/UART VDIM/UART -0.5 3.6 V

Maximum transient input clamping

for pins ZCD and CS

-ICLN_TR —10 mA

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Electrical Characteristics

3.3 Operating Conditions

Table 9 shows the recommended operating range where the electrical characteristics shown in Chapter 3.4

are valid for.

Maximum permanent input

clamping current for pins ZCD and CS

-ICLN_DC —5 mA

Permanently applied as DC

value

Maximum negative transient input

voltage at pin ZCD

-VIN_ZCD —1.5V

Maximum negative transient input

voltage at pin CS

-VIN_CS —3.0V

Maximum current into pin HV IHV —10 mA

Voltage at pin HV VHV — 600 V

1) Auto-restart may be delayed at low input voltage condition when junction temperature is above 125°C

2) According to JESD22A111 Rev A

3) ESD-HBM according to ANSI/ESDA/JEDEC JS-001-2012.

4) Only valid during transitions, allowed for maximum 2 µs and with a duty cycle of maximum 10%. Values for DC

operation, see absolute maximum table.

Table 9 Operating Range

Parameter Symbol Limit Values Unit Remarks

min max

Lower VCC limit VCC VUVOFF — V Device is held in reset

when VCC < VUVOFF

Voltage externally supplied to VCC

VCCext — 24 V Maximum voltage that can

be applied to pin VCC by

an external voltage source

Voltage at pin GD VGD -0.3 VCC + 0.3 V

Voltage at pin SQW VSQW -0.3 VCC + 0.3 V

Table 8 Absolute Maximum Ratings (cont’d)

Parameter Symbol Limit Values Unit Remarks

min max

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Electrical Characteristics
3.4 DC Electrical Characteristics
The electrical characteristics involve the spread of values given within the specified supply voltage and
junction temperature range, TJ from -40 °C to +125 °C. Typical values represent the median values related to
TA = 25 °C. All voltages refer to GND, and the assumed supply voltage is VCC = 18 V, if not specified otherwise.
The following characteristics are specified
• Power supply (Table 10)
• Clock Oscillators (Table 11)
• Internal temperature sensor (Table 12)
•Pin ZCD (Table 13)
•Pin DIM/UART (Table 14)
•Pin CS (Table 15)
•Pin GD (Table 16)
•Pin HV (Table 17)
•Pin SQW (Table 18)
Table 10   Electrical Characteristics of the Power Supply
Parameter Symbol Values Unit Note or 
Test Condition
Min. Typ. Max.
VCC turn-on threshold VVCCon 19 20.5 22 V dVCC/dt = 0.2 V/ms
VCC turn-off threshold VUVOFF -5% 6 +5% V
VCC UVOFF current IVCCUVOFF 52040mAV
CC < VVCCon(min)- 0.3 V
VCC threshold for turning on 
HV startup cell in auto restart 
and latch mode
VUVLO -5% 7.5 +5% V
VCC threshold for turning off 
HV startup cell in auto restart
VOVLO — 20.5 — V
VCC average quiescent 
current in latched mode
IVCCqu,latch — 0.3 0.48 mA Tj ≤ 85°C, Latch mode
——1.2mATj ≤ 125°C, Latch mode
VCC average quiescent 
current in auto restart mode
IVCCqu,restart — 0.3 0.48 mA Tj ≤ 85°C, Off phase in 
auto restart mode
——1.2mATj ≤ 125°C, Off phase in 
auto restart mode
VCC voltage for OTP 
programming
VPP 7.35 7.5 7.65 V Operational values, 
not tested in 
production test

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Electrical Characteristics

Table 11 Electrical Characteristics of the Clock Oscillators

Parameter Symbol Values Unit Note or

Test Condition

Min. Typ. Max.

Main clock oscillator period tMCLK 15.0 15.8 16.6 ns 136.4kHz < f_sw_max ≤

180.8kHz

20.0 20.9 22.0 ns f_sw_max ≤ 136.4kHz

DCM Minimum switching

frequency

f_sw_min_DCM -5.1% 1) +5.3% kHz

Maximum switching frequency f_sw_max -5.1% 1)

1) See configuration chapter

+5.3% kHz

Table 12 Electrical Characteristics of the Internal Temperature Sensor

Parameter Symbol Values Unit Note or

Test Condition

Min. Typ. Max.

Internal Temperature sensing T_critical,

T_start,

T_hot

-6 1)

1) See configuration chapter

+6 °C 3 sigma deviation by

lab characterization,

not tested in

production

Table 13 Electrical Characteristics of pin ZCD

Parameter Symbol Values Unit Note or

Test Condition

Min. Typ. Max.

ZCD clamping of negative

voltages

-VINPCLN 150 180 220 mV analog clamp

activated

ZCD threshold VZCDdet 52035mV

ZCD clamping current -IIV 0.021 — 3.14 mA

ZCD voltage sensing VZCDSH 0.067 — 2.61 V

ZCD S&H delay of input buffer

referring to positive jump of

ZCD voltage

tZSHST ——2.0µsnot tested in

production

Table 14 Electrical Characteristics of pin DIM/UART

Parameter Symbol Values Unit Note or

Test Condition

Min. Typ. Max.

Dimming mode voltage VDIM 0.1 — 2.0 V

Datasheet 29 Rev. 2.0

2016-08-01

ICL8105 - Digital Flyback Controller IC

Datasheet

Electrical Characteristics

UART mode output low

voltage

VUARTLow ——0.8VIOL = 2 mA

UART mode output high

voltage

VUARTHigh 2.2——VIOH = -2 mA

Table 15 Electrical Characteristics of pin CS

Parameter Symbol Values Unit Note or

Test Condition

Min. Typ. Max.

CS voltage threshold for 1st

level overcurrent protection

V_OCP1 -5% 1)

1) see configuration chapter

+5% V V_OCP1 = 1.08V, 0.72V or

0.54V

-5% 1) +8% V_OCP1 = 0.36V

CS voltage threshold for 2nd

level overcurrent protection

V_OCP2 -5% 1.6 +5% V 0.72V < V_OCP1 ≤ 1.08V

-5% 1.2 +5% V 0.54V < V_OCP1 ≤ 0.72V

-5% 0.8 +5% V 0.36V < V_OCP1 ≤ 0.54V

-5% 0.6 +5% V 0.34V ≤ V_OCP1 ≤ 0.36V

Table 16 Electrical Characteristics of pin GD

Parameter Symbol Values Unit Note or

Test Condition

Min. Typ. Max.

Output voltage at low state VGDlow ——1.6VI

GD = 5 mA1)

1) Not tested in production test

Output voltage at high state V_GD — 10.5 — V

Tolerance of output voltage at

high state

VGD -0.5V — +0.5V

Output high current I_GD_pk -20% 2)

2) See configuration chapter

+20% mA CLOAD = 2 nF

Discharge current IGDDIS 500 — — mA VGD = 4V and driver at

low state

Table 17 Electrical Characteristics of pin HV

Parameter Symbol Values Unit Note or

Test Condition

Min. Typ. Max.

Leakage current at pin HV IHVleak ——10mAV

HV = 600 V, HV startup

cell disabled

Table 14 Electrical Characteristics of pin DIM/UART (cont’d)

Parameter Symbol Values Unit Note or

Test Condition

Min. Typ. Max.

Datasheet 30 Rev. 2.0

2016-08-01

ICL8105 - Digital Flyback Controller IC

Datasheet

Electrical Characteristics

Current for VCC cap charging ILD 3.2 5 7.5 mA VHV = 30 V;

VVCC < VVCCon - 0.3 V

Current into pin HV IHV,max ——9.6mA

Table 18 Electrical Characteristics of pin SQW

Parameter Symbol Values Unit Note or

Test Condition

Min. Typ. Max.

Squarewave frequency f_SQW -5.1% 160 +5.3% kHz

Output voltage at low state VSQWlow ——1.6VI

SQW = 5 mA1)

1) Not tested in production test.

Output voltage at high state V_SQW —V 7.5 — V

Tolerance of output voltage at

high state

V_SQW -0.5V — +0.5V

Output high current -ISQWH -20% 30 +20% mA CLOAD = 2 nF

Discharge current ISQWDIS 500 — — mA VSQW = 4V and pin at

low state

Table 17 Electrical Characteristics of pin HV (cont’d)

Parameter Symbol Values Unit Note or

Test Condition

Min. Typ. Max.

Datasheet 31 Rev. 2.0

2016-08-01

ICL8105 - Digital Flyback Controller IC

Datasheet

Outline dimensions

4 Outline dimensions

Figure 19 PG-DSO-8

Notes

1. You can find all of our packages, sorts of packing and others in our Infineon Internet Page “Products”:

http://www.infineon.com/products.

2. Dimensions in mm

Does not include plastic or metal protrusion of 0.15 max. per side

-0.05

-0.2

+0.1

0.41

Index Marking (Chamfer)

1.27

0.1

0.2

(1.5)

0.1 MIN.

1.75 MAX.

±0.2

0.64

0.33 4

-0.2

-0.01

0.2

+0.05

x 45˚

±0.08

±0.25

MAX.8˚

Index

Marking

Trademarks of Infineon Technologies AG

AURIX™, C166™, CanPAK™, CIPOS™, CoolGaN™, CoolMOS™, CoolSET™, CoolSiC™, CORECONTROL™, CROSSAVE™, DAVE™, DI-POL™, DrBLADE™, EasyPIM™,

EconoBRIDGE™, EconoDUAL™, EconoPACK™, EconoPIM™, EiceDRIVER™, eupec™, FCOS™, HITFET™, HybridPACK™, Infineon™, ISOFACE™, IsoPACK™, i-

Wafer™, MIPAQ™, ModSTACK™, my-d™, NovalithIC™, OmniTune™, OPTIGA™, OptiMOS™, ORIGA™, POWERCODE™, PRIMARION™, PrimePACK™,

PrimeSTACK™, PROFET™, PRO-SIL™, RASIC™, REAL3™, ReverSave™, SatRIC™, SIEGET™, SIPMOS™, SmartLEWIS™, SOLID FLASH™, SPOC™, TEMPFET™,

thinQ!™, TRENCHSTOP™, TriCore™.

Other Trademarks

Advance Design System™ (ADS) of Agilent Technologies, AMBA™, ARM™, MULTI-ICE™, KEIL™, PRIMECELL™, REALVIEW™, THUMB™, µVision™ of ARM Limited,

UK. ANSI™ of American National Standards Institute. AUTOSAR™ of AUTOSAR development partnership. Bluetooth™ of Bluetooth SIG Inc. CAT-iq™ of DECT

Forum. CIPURSE™ of OSPT Alliance. COLOSSUS™, FirstGPS™ of Trimble Navigation Ltd. EMV™ of EMVCo, LLC (Visa Holdings Inc.). EPCOS™ of Epcos AG.

FLEXGO™ of Microsoft Corporation. HYPERTERMINAL™ of Hilgraeve Incorporated. MCS™ of Intel Corp. IEC™ of Commission Electrotechnique Internationale.

IrDA™ of Infrared Data Association Corporation. ISO™ of INTERNATIONAL ORGANIZATION FOR STANDARDIZATION. MATLAB™ of MathWorks, Inc. MAXIM™ of

Maxim Integrated Products, Inc. MICROTEC™, NUCLEUS™ of Mentor Graphics Corporation. MIPI™ of MIPI Alliance, Inc. MIPS™ of MIPS Technologies, Inc.,

USA. muRata™ of MURATA MANUFACTURING CO., MICROWAVE OFFICE™ (MWO) of Applied Wave Research Inc., OmniVision™ of OmniVision Technologies,

Inc. Openwave™ of Openwave Systems Inc. RED HAT™ of Red Hat, Inc. RFMD™ of RF Micro Devices, Inc. SIRIUS™ of Sirius Satellite Radio Inc. SOLARIS™ of

Sun Microsystems, Inc. SPANSION™ of Spansion LLC Ltd. Symbian™ of Symbian Software Limited. TAIYO YUDEN™ of Taiyo Yuden Co. TEAKLITE™ of CEVA,

Inc. TEKTRONIX™ of Tektronix Inc. TOKO™ of TOKO KABUSHIKI KAISHA TA. UNIX™ of X/Open Company Limited. VERILOG™, PALLADIUM™ of Cadence Design

Systems, Inc. VLYNQ™ of Texas Instruments Incorporated. VXWORKS™, WIND RIVER™ of WIND RIVER SYSTEMS, INC. ZETEX™ of Diodes Zetex Limited.

Trademarks Update 2014-11-12

Edition 2016-08-01

Published by

Infineon Technologies AG

81726 Munich, Germany

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