SSC2001S - Allegro MicroSystems Europe Ltd.

SANKEN ELECTRIC CO., LTD.

http://www.sanken-ele.co.jp/en/

Description

The SSC2001S is a continuous conduction mode (CCM)

control IC for power factor correction (PFC). The IC allows

the realization of high-power output and high-efficiency

power management systems, which require few external

components because of the built-in average current control

system.

Features and Benefits

• Continuous conduction mode (CCM) system: low peak

current and suitability for high power applications

• Average current control system: no multiplier and few

external components allows simple circuit configuration

because no input voltage detection required

• PWM and frequency modulation functions: PWM

operation frequency fixed at 65 kHz (typ) with

superimposed variable frequency according to duty cycle

• Maximum duty cycle 94% (typ)

• Error amplifier reference voltage 3.5 V (typ)

• Built-in high speed load response (HSR) function

• Brown-in/brown-out protection function: protects the

power supply at low input voltages

Power Factor Correction

Continuous Conduction Mode Controller

Typical Application Diagram

Package: 8-pin SOP

Not to scale

Continued on the next page…

SSC2001S

July 27, 2012SSC2001S-DS

Applications:

Power factor correction of middle to high power for electronic

devices such as:

• AC/DC power supplies

• Digital appliances for large size LCD/PDP television and

so forth

• Office automation (OA) equipment for computer, server,

monitor, and so forth

• Communication facilities

VAC E

GND

VOUT

R8 Q1

L1 D1

R4 C4

1 GND

2 ICOMP

3 IS

4 VINS

8 GATE

7 VCC

6 VFB

5 VCOMP

SSC2001S

External power

supply

DZ1

Input

Filter

SANKEN ELECTRIC CO., LTD.

Power Factor Correction

Continuous Conduction Mode Controller

SSC2001S

July 27, 2012

SSC2001S-DS

Features and Benefits (continued)

The polarity value for current specifies a sink as "+," and a source as “,” referencing the IC.

Absolute Maximum Ratings, valid at TA = 25°C

Characteristic Symbol Pins Rating Unit

VCC Pin Voltage VCC 710.3 to 30 V

VINS Pin Voltage VINS 410.3 to 5.5 V

ICOMP Pin Voltage VICOMP 210.3 to 5.5 V

IS Pin Voltage VIS 315.5 to 0.3 V

IS Pin Current IIS 311 to 1 mA

VFB Pin Voltage VFB 610.3 to 5.5 V

VFB Pin Current IFB 611 to 1 mA

VCOMP Pin voltage VVCOMP 510.3 to 5.5 V

GATE Pin voltage VGATE 810.3 to 30 V

Frame Temperature during Operation TFOP 40 to 110 °C

Storage Temperature Tstg 40 to 125 °C

Junction Temperature TJ40 to 150 °C

• Protection functions:

▫ Output overvoltage protection (OVP): turns off gate output on

pulse-by-pulse basis, with auto restart

▫ Overcurrent protection (OCP): two types, both with auto

restart:

– VIS(OCPL) : limits power by reducing duty cycle of next cycle

after detection

– VIS(OCPH) : turns off gate output on pulse-by-pulse basis

▫ Open loop detection (OLD) on output: stops oscillation, and

the operation switches to standby mode; auto restart after

removal of cause of open loop

SANKEN ELECTRIC CO., LTD.

Power Factor Correction

Continuous Conduction Mode Controller

SSC2001S

July 27, 2012

SSC2001S-DS

Electrical Characteristics Unless specifically noted, TA is 25°C, VCC = 15 V

Characteristic Symbol Test Conditions Pins Min. Typ. Max. Unit

Power Supply Start-up Operation

Operation Start Voltage VCC(ON) 71 10.5 11.3 12.1 V

Operation Stop Voltage VCC(OFF) 71 9.5 10.3 11.1 V

Operation Voltage Hysteresis VCC(HYS) 71 0.7 0.9 1.1 V

Circuit Current in Non-Operation ICC(OFF) VCC = 10 V 71 30 100 200 A

Circuit Current in Operation ICC(ON) 71 6.0 9.0 12.0 mA

Circuit Current in Standby ICC(STANDBY) VFB = 0.5 V 71 2.0 4.0 6.0 mA

Oscillator Operation

Oscillating Frequency fOSC VIS = 0 V, VVCOMP = 4 V 81576570kHz

Maximum Duty Cycle DMAX VIS = 0 V, VVCOMP = 4 V 81 90 94 99.3 %

Minimum Duty Cycle DMIN VIS = 0.5 V, VVCOMP = 0 V 810%

Minimum Off-Time* tOFFMIN 81 150 250 350 ns

Protection Operation

VFB Pin Open Loop Detection

Threshold Voltage VFB(OLD) 61 0.51 0.55 0.59 V

VFB Pin Overvoltage Protection

Threshold Voltage VFB(OVP) 61 3.57 3.745 3.85 V

IS Pin Overcurrent Protection High

Threshold Voltage VIS(OCPH) 310.81 0.75 0.69 V

IS Pin Overcurrent Protection Low

Threshold Voltage VIS(OCPL) 310.54 0.5 0.46 V

VINS Pin Input Undervoltage

Protection Low Threshold Voltage VINS(L) VVINS = 0 V 41 0.51 0.55 0.59 V

VINS Pin Input Undervoltage

Protection High Threshold Voltage VINS(H) 41 0.94 1.0 1.08 V

VINS Pin Input Undervoltage

Protection Bias Current IVINS(BIAS) 411.0 0A

Current Loop

Current Amplifier Transconductance

Gain gmCA 1.1 1.4 1.7 ms

Current Amplifier Output Source

Current* ICA(SO) 50 A

Current Amplifier Output Sink Current* ICA(SK) 50 A

ICOMP Pin Output Open Loop

Detection Threshold Voltage VICOMP(OLD) VFB=0.5V 21 3.6 4.0 4.3 V

Continued on the next page…

SANKEN ELECTRIC CO., LTD.

Power Factor Correction

Continuous Conduction Mode Controller

SSC2001S

July 27, 2012

SSC2001S-DS

Voltage Loop

Error Amplifier Reference Voltage VFB(REF) IVCOMP = 0 A61 3.4 3.5 3.6 V

Error Amplifier Transconductance

Gain gmEA 45 60 75 s

Error Amplifier Maximum Source

Current IVCOMP(SO) 5138 30 21 A

Error Amplifier Maximum Sink Current IVCOMP(SK) 51213038A

VFB Pin High Speed Load Response

Operation Enable Voltage* VFB(HSR)ENABLE 613.4 V

VFB Pin High Speed Load Response

Operation Start Voltage VFB(HSR)ACTIVE 61 3.24 3.325 3.41 V

VCOMP Pin High Speed Load

Response Source Current IVCOMP(SOHSR) 51127 100 72 A

VFB Pin Input Bias Current IFB(BIAS) 611A

VCOMP Pin Output Open Loop

Detection Threshold Voltage VVCOMP(OLD) VFB = 0.5 V 51 0.60 1.03 1.40 V

Drive Circuit

GATE Pin Voltage (Low) VGATE(L) IGATE = 20 mA 810.4 V

GATE Pin Voltage (High) VGATE(H) VCC = 11 V 8110.5 V

GATE Pin Rise Time tr81100 ns

GATE Pin Fall Time tf8150 ns

GATE Pin Peak Source Current* IGATE(SO) 810.5 A

GATE Pin Peak Sink Current* IGATE(SK) 811.0 A

Thermal Characteristics

Thermal Resistance from Junction to

Frame RJ-F

The frame temperature, TF

, is

specified by using the temperature

at the base of pin 1.

65 85 °C/W

*Determined by design, not tested in production.

Electrical Characteristics (continued) Unless specifically noted, TA is 25°C, VCC = 15 V

Characteristic Symbol Test Conditions Pins Min. Typ. Max. Unit

SANKEN ELECTRIC CO., LTD.

Power Factor Correction

Continuous Conduction Mode Controller

SSC2001S

July 27, 2012

SSC2001S-DS

Pin List Table

Name Number Function

1 GND Ground

2 ICOMP Current amplifier output

3 IS Overcurrent detection signal input

4 VINS Low-voltage detection signal input (brown-in/brown-

out protection function)

5 VCOMP Error amplifier output/phase compensation

6 VFB Output constant voltage control signal/output overvolt-

age signal/output open loop detection signal input

7 VCC Control circuit power supply input

8 GATE Gate drive output

Functional Block Diagram

VCC

ICOMP

GATE

VINS

VFB

VCOMPGND

Input Low

Voltage Detection

OCP(H)

OCP(L)

Current AMP

HSR

Error AMP

OLD

OVP

Reg

UVLO

Protection PWM

Logic

Oscillator

Ramp

Generator

Protection

PWM

Logic

OLD

Input Low

Voltage Detection

PWM

Logic

Gate

Driver

GND

OCP(H)

OVP

SANKEN ELECTRIC CO., LTD.

Power Factor Correction

Continuous Conduction Mode Controller

SSC2001S

July 27, 2012

SSC2001S-DS

SOP8

Pb-free.

Device composition compliant

with the RoHS directive.

Unit： mm

4.4

5.2 ±0.3

±0.2

6.2 ±0.3

0.695 TYP

5.25 ±0.3

1.5 ±0.1

0.05 ±0.05

0.15

1.27±0.05

0.4±0.1

0.4±0.2

0 to 10°

0.10

0.12 M

+0.1

–0.05

Part Number

Lot Number

Sanken Control Number

Y is the last digit of the year (0 to 9)

M is the month (1 to 9, O, N, or D)

D is a period of days (1 to 3):

1 – 1st to 10th

2 – 11th to 20th

3 – 21st to 31st

SC2001

SK YMD

XXXX

Package Diagram

SANKEN ELECTRIC CO., LTD.

Power Factor Correction

Continuous Conduction Mode Controller

SSC2001S

July 27, 2012

SSC2001S-DS

Because reliability can be affected adversely by improper

storage environments and handling methods, please observe

the following cautions.

Cautions for Storage

• Ensure that storage conditions comply with the standard

temperature (5°C to 35°C) and the standard relative

humidity (around 40% to 75%); avoid storage locations

that experience extreme changes in temperature or

humidity.

• Avoid locations where dust or harmful gases are present

and avoid direct sunlight.

• Reinspect for rust on leads and solderability of the

products that have been stored for a long time.

Cautions for Testing and Handling

When tests are carried out during inspection testing and

other standard test periods, protect the products from

power surges from the testing device, shorts between

the product pins, and wrong connections. Ensure all test

parameters are within the ratings specified by Sanken for

the products.

Soldering

When soldering the products, please be sure to minimize

the working time, within the following limits:

260 ± 5°C 10±1 s (Flow, 2 times)

380±10°C 3.5±0.5 s (Soldering iron, 1 time)

Electrostatic Discharge

• When handling the products, the operator must be

grounded. Grounded wrist straps worn should have at

least 1 MΩ of resistance from the operator to ground to

prevent shock hazard, and it should be placed near the

operator.

• Workbenches where the products are handled should be

grounded and be provided with conductive table and floor

mats.

• When using measuring equipment such as a curve tracer,

the equipment should be grounded.

• When soldering the products, the head of soldering irons

or the solder bath must be grounded in order to prevent

leak voltages generated by them from being applied to the

products.

• The products should always be stored and transported in

Sanken shipping containers or conductive containers, or

be wrapped in aluminum foil.

SANKEN ELECTRIC CO., LTD.

Power Factor Correction

Continuous Conduction Mode Controller

SSC2001S

July 27, 2012

SSC2001S-DS

• The contents in this document are subject to changes, for improvement and other purposes, without notice. Make sure that this is the

latest revision of the document before use.

• Application and operation examples described in this document are quoted for the sole purpose of reference for the use of the prod-

ucts herein and Sanken can assume no responsibility for any infringement of industrial property rights, intellectual property rights or

any other rights of Sanken or any third party which may result from its use.

• Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semicon-

ductor products at a certain rate is inevitable. Users of Sanken products are requested to take, at their own risk, preventative measures

including safety design of the equipment or systems against any possible injury, death, fires or damages to the society due to device

failure or malfunction.

• Sanken products listed in this document are designed and intended for the use as components in general purpose electronic equip-

ment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.).

When considering the use of Sanken products in the applications where higher reliability is required (transportation equipment and

its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various safety devices, etc.), and whenever

long life expectancy is required even in general purpose electronic equipment or apparatus, please contact your nearest Sanken sales

representative to discuss, prior to the use of the products herein.

The use of Sanken products without the written consent of Sanken in the applications where extremely high reliability is required

(aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited.

• In the case that you use Sanken products or design your products by using Sanken products, the reliability largely depends on the

degree of derating to be made to the rated values. Derating may be interpreted as a case that an operation range is set by derating the

load from each rated value or surge voltage or noise is considered for derating in order to assure or improve the reliability. In general,

derating factors include electric stresses such as electric voltage, electric current, electric power etc., environmental stresses such

as ambient temperature, humidity etc. and thermal stress caused due to self-heating of semiconductor products. For these stresses,

instantaneous values, maximum values and minimum values must be taken into consideration.

In addition, it should be noted that since power devices or IC's including power devices have large self-heating value, the degree of

derating of junction temperature affects the reliability significantly.

• When using the products specified herein by either (i) combining other products or materials therewith or (ii) physically, chemically

or otherwise processing or treating the products, please duly consider all possible risks that may result from all such uses in advance

and proceed therewith at your own responsibility.

• Anti radioactive ray design is not considered for the products listed herein.

• Sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out of Sanken's distribu-

tion network.

• The contents in this document must not be transcribed or copied without Sanken's written consent.