SI8751AB-ASR - SILICON LABS - Datasheet.Directory

Si8751/52 Data Sheet

Isolated FET Driver with Pin Control or Diode Emulator Inputs

The Si875x enables new pathways to the creation of custom Solid State Relay (SSR) con-

figurations. The Si875x integrates robust isolation technology with an SSR FET driver. A

floating secondary side dc power supply is unnecessary as the product generates its own

self-contained gate drive output voltage. When combined with a customer-selected external

FET, a complete Solid State Relay is formed, allowing customers to optimize their system

for cost, PCB area, power, On-Resistance, and thermal performance.

Customers have a choice of digital input control (Si8751) or diode emulation control

(Si8752) to best suit their application. The Si875x integrates versatile outputs that support

driving AC or DC load configurations.

The Si875x eliminates the need for bulky mechanical relays which can be difficult to assem-

ble onto PCBs and add switching noise to the system.

Traditional SSRs integrate optocoupler-style LED inputs, which limit the operating tempera-

ture range of the solution. The Si875x experiences no such limitation and can support full

industrial and automotive temperature ranges with increased stability and longer life.

The Si875x drives FET gates with a nominal 10 V using as little as 1 mA input current. In-

creasing the input current to 10 mA enables turn-on times as fast as 94 μs. Input side vol-

tages on the Si8751 are flexible from 2.25 V to 5.5 V supporting seamless connection to

low-power controllers. The Si875x devices provide an Active Miller Clamp to prevent the un-

intended turn-on of the external FET when a high dV/dt is present on the FET’s drain.

The Si875x is qualified to the AEC-Q100 standard, making it suitable for automotive applica-

tions. Further, its 2.5 KVrms isolation rating forms the basis for full certification to UL, CSA,

VDE, and CQC.

Applications include mechanical relay, photo switch, or SSR replacement in motor control,

valve control, HVAC relay, automotive, charging, battery monitoring, ac mains line switch-

ing, and more.

The Si8751 and Si8752 come in ROHS-compliant SOIC-8 packaging, providing a compact,

industry-standard footprint and generous margin to creepage and clearance requirements.

KEY FEATURES

• Drives user-selected external FETs

• Choice of digital input control (Si8751)

or diode emulation control (Si8752)

• Internally generated secondary side

power supply

• 10 V output with 1 mA input current

• As fast as 82 μs turn-on time and 46

us turn-off time

• Active Miller Clamp to prevent

unintended turn-on and reduce

inductive chatter

• Supports AC or DC load switching

• 2.5 KVrms isolation rating

• UL, CSA, VDE, and CQC certifications

• AEC-Q100 qualified

• Industrial –40 to 105 °C or Automotive

–40 to 125 °C temperature ranges

• ROHS-compliant SOIC-8 Package

APPLICATIONS

• Motor Controls

• Valve Controls

• HVAC Relays

• HEV/EV Automotive Charging

• Battery Monitoring

• AC Mains Line Switching

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1. Ordering Guide

Table 1.1. Si8751/2 Ordering Guide

Ordering Part Number1,

Input Support Package Temperature Range (Ambient) Isolation Rating (kVrms)

Si8751AB-IS Digital CMOS SOIC-8 –40 to 105 °C Industrial 2.5 kV

Si8751AB-AS Digital CMOS SOIC-8 –40 to 125 °C Automotive 2.5 kV

Si8752AB-IS Diode Emulation SOIC-8 –40 to 105 °C Industrial 2.5 kV

Si8752AB-AS Diode Emulation SOIC-8 –40 to 125 °C Automotive 2.5 kV

Note:

1. "Si" and "SI" are used interchangeably.

2. Add an “R” at the end of the device to denote tape and reel option

Si8751/52 Data Sheet

Ordering Guide

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2. System Overview

Signal & Power Transmitter

CMOS Isolation

MCAP1

GATE

SOURCE

VDD

GND MCAP2

Receiver

Figure 2.1. Si8751 Block Diagram

CMOS Isolation

MCAP1

GATE

SOURCE

MCAP2

ANODE

CATHODE

Signal & Power Transmitter

Receiver

Figure 2.2. Si8752 Block Diagram

Si8751/52 Data Sheet

System Overview

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The operation of an Si875x channel is analogous to that of an optocoupler and gate driver, except an RF carrier is modulated instead of

light. This simple architecture provides a robust isolated data path and requires no special considerations or initialization at start-up. A

simplified block diagram for a single Si875x channel is shown in the figure below.

MODULATOR DEMODULATOR

RF OSCILLATOR

Semiconductor-

Based Isolation

Barrier

Transmitter Receiver

Figure 2.3. Simplified Channel Diagram

A channel consists of an RF Transmitter and RF Receiver separated by a semiconductor-based isolation barrier. Referring to the

Transmitter, input A modulates the carrier provided by an RF oscillator using on/off keying. The Receiver contains a demodulator that

decodes the input state according to its RF energy content and applies the result to output B via the output driver. This RF on/off keying

scheme is superior to pulse code schemes as it provides best-in-class noise immunity, low power consumption, and better immunity to

magnetic fields. See figure below for more details.

Input Signal

Output Signal

Modulation Signal

Figure 2.4. Modulation Scheme

2.1 Device Behavior

The following are truth tables for the Si875x family.

Table 2.1. Si8751 Truth Table

VDD IN Gate

Powered H H

Powered L L

Unpowered X L

Table 2.2. Si8752 Truth Table

Input Current Gate

> If(TH) H

< If(TH) L

Si8751/52 Data Sheet

System Overview

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2.2 Power Supply Connections (Si8751 Only)

The Si8751 requires a 0.1 µF bypass capacitor between VDD and GND. The capacitor should be placed as close as possible to the

package. To enhance the robustness of a design, the user may also include a 1 µf capacitor for bulk decoupling as well as a resistor

(50–300 Ω) in series with the input if the system is excessively noisy.

2.3 TT Pin Description (Si8751 Only)

The Si8751 provides a pin to control how much current is consumed by the supply when the input pin is logic high. The more current

consumed by the input supply, the faster the output can turn on the external FET. This allows the application designer to optimize the

tradeoff between power consumption and switching time.

Typically, this pin is connected to the supply ground through a resistor. The greater the value of the resistor, the less current is con-

sumed by the input supply. Values can range from 0 Ω (shorted to ground) to open (TT not connected).

In addition to a resistor, a capacitor, typically 0.1 µf, can be placed in parallel to the resistor. This allows the device to draw more current

to switch the external FET on quickly yet draw less supply current in the steady state. Total power over time is reduced while maintain-

ing fast switching of the FET.

Signal & Power Transmitter

CMOS Isolation

MCAP1

GATE

SOURCE

VDD

GND

Receiver

MCAP2

Figure 2.5. Si8751 TT Example

Max Drive

Current

Static Drive

Current

~1/C

Figure 2.6. Drive Current vs. Time Using TT with Capacitor

2.4 LED Emulator Input (Si8752 Only)

Figure 2.8. Diode Emulator Model and I-V Curve

The Si8752 uses input current to achieve the development of power across the isolation barrier. Therefore, the more current provided to

the input, the more power is developed on the isolated side of the device. This translates into a faster turn on time of the external FET.

This benefit is limited to an input current of about 15 mA. Beyond that, increasing the input current has little effect on the switching time

of the external FET.

Si8751/52 Data Sheet

System Overview

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2.5 Output Description

The output of the Si875x device develops a positive voltage on the GATE pin with respect to the SOURCE pin. This voltage is used to

turn on a typical field effect transistor (FET). Because power is transmitted across the isolation barrier, no isolated supply is required.

This can be used to drive a FET configured as a switch for a dc load. It can also be used to drive a pair of FETs configured as a switch

for an ac load. See 3. Applications.

2.6 Miller Clamp

2.6.1 Miller Clamp Description

The Si875x devices provide a clamping device to prevent unintended turn on of the external FET when a high dV/dt is present on the

FET’s drain. To use this feature, a capacitor is connected between the drain(s) of the FET(s) and one of the MCAPx inputs. A sudden,

positive slope on this pin will cause the clamp device within the Si875x to activate and provide a low impedance path between the gate

and source pins. This will prevent the FET from being unintentionally turned on.

The Si875x device provides two miller clamp input pins. This allows for both FET’s to be protected from unintended turn on when the

device is used in an AC switch configuration. In this case each drain is connected to an MCAPx input through a capacitor.

Connection to a MCAPx pin, and use of the Miller Clamp feature, is optional. The device will function as expected if these pins are left

unconnected.

2.6.2 Sizing Miller Clamp Capacitors

The recommended value of the capacitor used to connect the drain of the external FET to the Si875x device is typically 10 pf. If the

application has a very large dV/dt and the clamp is not adequately keeping the external FET off, then this capacitor value can be in-

creased up to 100 pf. The voltage rating of the capacitor should be greater than or equal to the peak voltage expected at the drain of

the FET. The relationship of the capacitor and the dV/dt is governed by the equation: C = IMC/(dV/dt); where: IMC is the Miller Clamp

input current (6mA max, as specified in Electrical Tables), and dV/dt is the expected slew rate.

Si8751/52 Data Sheet

System Overview

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3. Applications

The following examples illustrate typical circuit configurations using the Si8751/52.

3.1 DC SSR Example

The Si875x device can be used to control a dc load as shown in the following figure:

Signal & Power Transmitter

CMOS Isolation

MCAP1

GATE

SOURCE

MCAP2

VDD

GND

VDC

DC Load

Receiver

Figure 3.1. Driving an FET for DC Load Including Miller Clamp Capacitor

In this configuration, the Si8751 charges the gate of the external FET; turning it on. This switches on power, supplied by VDC, to the

load. The output side circuitry is identical if using the Si8752.

3.2 AC SSR Example

The Si875x can be used to control power to an ac load using the following circuit:

AC Load

Supply

Signal & Power Transmitter

CMOS Isolation

MCAP1

GATE

SOURCE

VDD

GND

Receiver

MCAP2

Figure 3.2. Driving FETs for AC Load Switching

In this configuration, both FET’s are turned on by the charge delivered by the Si8751. This allows ac current to flow to the load. When

the Si875x is turned off, charge is drained form the gates of both FET’s and the ac current is turned off. The output side circuitry is

identical if using the Si8752.

Si8751/52 Data Sheet

Applications

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4. Electrical Specifications

Table 4.1. Electrical Specifications

• Automotive: VDD=2.25 to 5.5V; GND=0V; TA=-40 to +125ºC; typical specs at 25ºC; TJ=-40 to +150ºC

• Industrial: VDD=2.25 to 5.5V; GND=0V; TA=-40 to +105ºC; typical specs at 25ºC; TJ=-40 to +150ºC

Parameter Symbol Test Condition Min Typ Max Unit

Si8751 Only

Input Side

Supply Voltage VDD 2.25 3.3 5.5 V

Supply Current IDD IN = 0V — 140 — nA

IN = VDD, TT = GND — 13.8 17 mA

IN = VDD, TT = 10 kΩ — 7.8 9.5 mA

IN = VDD, TT unconnected — 1.5 1.8 mA

High Level Input Voltage VIH 50% of VDD — — V

Low Level Input Voltage VIL — — 25% of VDD V

Input Hystersis VHYS — 180 — mV

Driver Side

GATE Off Voltage VG(OFF) IN = 0 V — 0 — mV

GATE On Voltage VG(ON) IN = VDD, TT = GND 7.5 10 13 V

IN = VDD, TT = 10 kΩ 9 10.8 13 V

IN = VDD, TT unconnected 9 10.8 13 V

GATE On Impedance RGIN = VDD, TT = GND — 162 330 kΩ

IN = VDD, TT = 10 kΩ — 265 370 kΩ

IN = VDD, TT unconnected — 1.5 1.85 MΩ

Turn-off Time TG(OFF) IN = 0 V — 15 35 µs

Turn-on Time (50% of VG(ON)) TG(ON) TT = GND — 42 120 µs

TT = 10 kΩ — 58 170 µs

TT unconnected — 286 650 µs

Turn-on Time (90% of VG(ON)) TG(ON) TT = GND — 85.3 190 µs

TT = 10 kΩ — 130 260 µs

TT unconnected — 0.7 1.2 ms

Si8752 Only

Input Side

Input Current IF(ON) 1.0 — 30.0 mA

Guaranteed Off Current IF(OFF) — — 10 µA

Forward Voltage (OFF) VF(OFF) Measured ANODE with respect to Cathode — 0 — V

Si8751/52 Data Sheet

Electrical Specifications

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Parameter Symbol Test Condition Min Typ Max Unit

Forward Voltage (ON) VF(ON) 1 mA < IF < 10 mA, measured ANODE with re-

spect to cathode

1.8 — 2.35 V

10 mA < IF < 30 mA, measured ANODE with

respect to cathode

2.03 — 2.7 V

Driver Side

GATE Off Voltage VG(OFF) IF = 0 mA — 0 — mV

GATE On Voltage VG(ON) IF = 1 mA 8 10.3 13 V

IF = 10 mA 8 10.3 13 V

IF = 30 mA 8 10.9 13 V

GATE On Impedance RGIF = 1 mA — 2.7 3.5 MΩ

IF = 10 mA — 194 300 kΩ

IF = 30 mA — 168 290 kΩ

Turn-off Time TG(OFF) IF = 0 mA — 15 35 µs

Turn-on Time (50% of VG(ON)) TG(ON) IF = 1 mA — 463 720 µs

IF = 10 mA — 41 125 µs

IF = 30 mA — 36 90 µs

Turn-on Time (90% of VG(ON)) TG(ON) IF = 1 mA — 1.1 1.49 ms

IF = 10 mA — 94 190 µs

IF = 30 mA — 82 180 µs

Si8751 and Si8752

Miller Clamp Current IMC Max input current — — 6 mA

Miller Clamp Pull-Down Current IGIMC = 50 µA; VGate = 1 V 5 12.8 — mA

Gate OFF Impedance IF = 0 mA (Si8752)

IN = 0 V (Si8751)

— 21.5 — MΩ

Common Mode Transient Immunity VCM = 1500 V 20 — — kV/µs

Note:

1. All measurements use 100 pF gate capacitance load unless specified.

Si8751/52 Data Sheet

Electrical Specifications

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4.1 Test Circuits

The following figure depicts a common-mode transient immunity test circuit:

Oscilloscope

High-Voltage

Differential

Probe

Si8751

VDD

GND

MCAP1

SOURCE

GATE

MCAP2

Isolated

Supply

Isolated

Ground

High-Voltage Surge

Generator

Figure 4.1. Common-Mode Transient Immunity Test Circuit

4.2 Regulatory Information

Table 4.2. Regulatory Information1,2

CSA

The Si875x is certified under CSA Component Acceptance Notice 5A. For more details, see Master Contract Number 232873.

60950-1: Up to 125 VRMS reinforced insulation working voltage; up to 600 VRMS basic insulation working voltage.

VDE

The Si875x is certified according to VDE 0884-10. For more details, see Certificate 40018443.

VDE 0884-10: Up to 630 Vpeak for basic insulation working voltage.

The Si875x is certified under UL1577 component recognition program. For more details, see File E257455.

Rated up to 2500 VRMS isolation voltage for basic protection.

CQC

The Si875x is certified under GB4943.1-2011. For more details, see Certificate CQC17001177960.

Rated up to 125 VRMS reinforced insulation working voltage; up to 600 VRMS basic insulation working voltage.

1. Regulatory Certifications apply to 2.5 kVRMS rated devices which are production tested to 3.0 kVRMS for 1 sec.

2. For more information, see 1. Ordering Guide.

Si8751/52 Data Sheet

Electrical Specifications

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Table 4.3. Insulation and Safety-Related Specifications

Parameter Symbol Test Condition SOIC-8 Value Unit

Nominal External Air Gap

(Clearance)

CLR 4.7 mm

Nominal External Tracking

(Creepage)

CPG 3.9 mm

Minimum Internal Gap

(Internal Clearance)

DTI 0.008 mm

Tracking Resistance PTI IEC60112 600 V

Erosion Depth ED 0.04 mm

Resistance

(Input-Output)1

RIO 1012 Ω

Capacitance

(Input-Output)1

CIO f = 1 MHz 0.5 pF

Input Capacitance2CI3.0 pF

Notes:

1. To determine resistance and capacitance, the Si875x is converted into a 2-terminal device. All pins on side 1 are shorted to cre-

ate terminal 1, and all pins on side 2 are shorted to create terminal 2. The parameters are then measured between these two

terminals.

2. Measured from input pin to ground.

Table 4.4. IEC 60664-1 Ratings

Parameter Test Condition SOIC-8 Specification

Basic Isolation Group Material Group I

Installation Classification Rated Mains Voltages < 150 VRMS I-IV

Rated Mains Voltages < 300 VRMS I-III

Rated Mains Voltages < 400 VRMS I-II

Rated Mains Voltages < 600 VRMS I-II

Si8751/52 Data Sheet

Electrical Specifications

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Table 4.5. VDE 0884 Insulation Characteristics1

Parameter Symbol Test Condition Characteristic Unit

Maximum Working Insulation Voltage VIORM 630 V peak

Input to Output Test Voltage VPR Method b1

(VIORM x 1.875 = VPR, 100%

Production Test, tm = 1 sec,

Partial Discharge < 5 pC)

1181 V peak

Transient Overvoltage VIOTM t = 60 sec 4000 V peak

Surge Voltage VIOSM Tested per IEC 60065 with surge

voltage of 1.2 µs/50 µs

Si875x tested with 4000 V

3077 Vpeak

Pollution Degree

(DIN VDE 0110, Table 1)

Insulation Resistance at

TS, VIO = 500 V

RS>109Ω

Note:

1. Maintenance of the safety data is ensured by protective circuits. The Si875x provides a climate classification of 40/125/21.

Table 4.6. IEC Safety Limiting Values1

Parameter Symbol Test Condition SOIC-8 Unit

Safety Temperature TS150 °C

Safety Input Current

(Si8751)

ΙSθJA = 110 °C/W

VDD = 5.5 V,

TJ = 150 °C,

TA = 25 °C

206 mA

θJA = 110 °C/W

VDD = 3.63 V,

TJ = 150 °C,

TA = 25 °C

313 mA

θJA = 110 °C/W

VDD = 2.75 V,

TJ = 150 °C,

TA = 25 °C

413 mA

Safety Input Current

(Si8752)

ΙSθJA = 110 °C/W

VF = 2.5 V,

TJ = 150 °C,

TA = 25 °C

454 mA

Si8751/52 Data Sheet

Electrical Specifications

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Parameter Symbol Test Condition SOIC-8 Unit

Safety Input Power

(Si8752)

PSθJA = 110 °C/W

VF = 2.5 V,

TJ = 150 °C,

TA = 25 °C

1136 mW

Device Power Dissipation PD1 W

Note:

1. Maximum value allowed in the event of a failure. Refer to the thermal derating curves below.

Si8751/52 Data Sheet

Electrical Specifications

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Table 4.7. Thermal Characteristics

Parameter Symbol SOIC-8 Unit

IC Junction-to-Air

Thermal Resistance

θJA 110 °C/W

Figure 4.2. Thermal Derating Curve for Safety Limiting Current (Si8751)

Figure 4.3. Thermal Derating Curve for Safety Limiting Current (Si8752)

Si8751/52 Data Sheet

Electrical Specifications

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Table 4.8. Absolute Maximum Ratings1

Parameter Symbol Min Max Units

Storage Temperature TSTG –65 +150 °C

Operating Temperature TA–40 +125 °C

Junction Temperature TJ— +150 °C

Input-side supply voltage (Si8751) VDD –0.6 6.0 V

Voltage on any input side pin with respect to ground (pin

4, Si8751 only)

VIO –0.5 VDD + 0.5 V

Average Forward Anode Current (Si8752) IF(AVG) — 30 mA

Reverse Anode Voltage (Si8752) VR— 0.3 V

Lead Solder Temperature (10 s) — 260 °C

ESD Rating, HBM — 3500 V

ESD Rating, CDM — 2000 V

Maximum Isolation Voltage (Input to Output) (1 sec)

SOIC-8

— 3000 VRMS

Latch-up Immunity — 400 kV/μs

Note:

1. Permanent device damage may occur if the absolute maximum ratings are exceeded. Functional operation should be restricted to

the conditions specified in the operational sections of this data sheet.

Si8751/52 Data Sheet

Electrical Specifications

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4.3 Typical Operating Characteristics

Figure 4.4. Si8751 Typical Gate Voltage vs. Temperature

and TT

Figure 4.5. Si8752 Typical Gate Voltage vs. Temperature

and Anode Current

Figure 4.6. Si8751 Typical Turn-On Time vs. Temperature

and TT with 100 pF Load (50% of Output)

Figure 4.7. Si8752 Typical Turn-On Time vs. Temperature

and Anode Current with 100 pF Load (50% of Output)

Si8751/52 Data Sheet

Electrical Specifications

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Figure 4.8. Si8751 Typical Turn-On Time vs. Temperature

and TT with 100 pF Load (90% of Output)

Figure 4.9. Si8752 Typical Turn-On Time vs. Temperature

and Anode Current with 100 pF Load (90% of Output)

Figure 4.10. Si8751 Typical Turn-On Time vs. Capacitance

and TT (50% of Output)

Figure 4.11. Si8752 Typical Turn-On Time vs. Capacitance

and Anode Current (50% of Output)

Si8751/52 Data Sheet

Electrical Specifications

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Figure 4.12. Si8751 Typical Turn-On Time vs. Capacitance

and TT (90% of Output)

Figure 4.13. Si8752 Typical Turn-On Time vs. Capacitance

and Anode Current (90% of Output)

Si8751/52 Data Sheet

Electrical Specifications

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5. Pin Descriptions

5.1 Si8751 Pin Descriptions

4 5

SOURCE

MCAP2

MCAP1

GATE

GND

VDD

Si8751

Figure 5.1. Pin Assignments Si8751

Table 5.1. Si8751 Pin Descriptions

Pin Name Description

1 VDD Input side power supply

2 TT Turn-on time control (optional)

3 IN Digital control input

4 GND Input side ground

5 SOURCE Connection to switch FET Source

6 MCAP2 Miller capacitance control 2 (optional)

7 MCAP1 Miller capacitance control 1 (optional)

8 GATE Connection to switch FET Gate

Si8751/52 Data Sheet

Pin Descriptions

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5.2 Si8752 Pin Descriptions

4 5

8GATE

MCAP2

MCAP1

SOURCE

CATHODE

ANODE

Si8752

Figure 5.2. Pin Assignments Si8752

Table 5.2. Si8752 Pin Descriptions

Pin Name Description

1 NC No Connect

2 ANODE Anode of LED emulator

3 NC No Connect

4 CATHODE Cathode of LED emulator

5 SOURCE Connection to switch FET Source

6 MCAP2 Miller capacitance control 2 (optional)

7 MCAP1 Miller capacitance control 1 (optional)

8 GATE Connection to switch FET Gate

Si8751/52 Data Sheet

Pin Descriptions

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6. Package Outlines

6.1 Package Outline: 8-Pin Narrow Body SOIC

The figure below illustrates the package details for the Si875x in an 8-pin narrow-body SOIC package. The table below lists the values

for the dimensions shown in the illustration.

Figure 6.1. 8-Pin Narrow Body SOIC Package

Si8751/52 Data Sheet

Package Outlines

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Table 6.1. 8-Pin Narrow Body SOIC Package Diagram Dimensions

Symbol Millimeters

Min Max

A 1.35 1.75

A1 0.10 0.25

A2 1.40 REF 1.55 REF

B 0.33 0.51

C 0.19 0.25

D 4.80 5.00

E 3.80 4.00

e 1.27 BSC

H 5.80 6.20

h 0.25 0.50

L 0.40 1.27

α 0° 8°

Si8751/52 Data Sheet

Package Outlines

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7. Land Patterns

7.1 Land Pattern: 8-Pin Narrow Body SOIC

The figure below illustrates the recommended land pattern details for the Si875x in an 8-pin narrow-body SOIC. The table below lists

the values for the dimensions shown in the illustration.

Figure 7.1. 8-Pin Narrow Body SOIC Land Pattern

Table 7.1. 8-Pin Narrow Body SOIC Land Pattern Dimensions

Dimension Feature (mm)

C1 Pad Column Spacing 5.40

E Pad Row Pitch 1.27

X1 Pad Width 0.60

Y1 Pad Length 1.55

Notes:

1. This Land Pattern Design is based on IPC-7351 pattern SOIC127P600X173-8N for Density Level B (Median Land Protrusion).

2. All feature sizes shown are at Maximum Material Condition (MMC) and a card fabrication tolerance of 0.05 mm is assumed.

Si8751/52 Data Sheet

Land Patterns

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8. Top Markings

8.1 8-Pin Narrow Body SOIC

Table 8.1. Top Marking Explanation

Line 1 Marking: Customer Part Number Si875 = ISOdriver product series

X: 1 = Digital input, 2 = LED emulator input

A: Reserved

V: B = 2.5 kV isolation rating

Line 2 Marking: TTTTTT = Mfg code Manufacturing Code from Assembly Purchase Order form.

Line 3 Marking: YY = Year

WW = Work week

Assigned by the Assembly House. Corresponds to the year and

workweek of the mold date.

Si8751/52 Data Sheet

Top Markings

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9. Revision History

Revision 1.0, December 2017

• Significant edits with production electrical specifications and load switching diagram.

Revision 0.5, September 2016

• Significant edits with production electrical specifications.

Revision 0.1, May 2016

• Initial revision.

Si8751/52 Data Sheet

Revision History

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Table of Contents

1. Ordering Guide ..............................2

2. System Overview ..............................3

2.1 Device Behavior .............................4

2.2 Power Supply Connections (Si8751 Only) ....................5

2.3 TT Pin Description (Si8751 Only) .......................5

2.4 LED Emulator Input (Si8752 Only) .......................5

2.5 Output Description ............................6

2.6 Miller Clamp ..............................6

2.6.1 Miller Clamp Description ........................6

2.6.2 Sizing Miller Clamp Capacitors ......................6

3. Applications................................7

3.1 DC SSR Example ............................7

3.2 AC SSR Example ............................7

4. Electrical Specifications ...........................8

4.1 Test Circuits ..............................10

4.2 Regulatory Information ...........................10

4.3 Typical Operating Characteristics .......................16

5. Pin Descriptions ............................. 19

5.1 Si8751 Pin Descriptions ..........................19

5.2 Si8752 Pin Descriptions ..........................20

6. Package Outlines ............................. 21

6.1 Package Outline: 8-Pin Narrow Body SOIC ....................21

7. Land Patterns .............................. 23

7.1 Land Pattern: 8-Pin Narrow Body SOIC .....................23

8. Top Markings .............................. 24

8.1 8-Pin Narrow Body SOIC ..........................24

9. Revision History ............................. 25

Table of Contents 26

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