UC3842A View Datasheet(PDF) - Unisonic Technologies

Part Name

Description

Manufacturer

UC3842A

CURRENT MODE PWM CONTROL CIRCUITS

Unisonic Technologies 

UC3842A/3843A

PIN CONFIGURATION

COMP 1

VFB 2

Current Sense 3

RT/CT 4

LINEAR INTEGRATED CIRCUIT

8 VREF

7 VCC

6 Output

5 GND

BLOCK DIAGRAM

VREF

8

Internal

Bias

VFB

2

COMP 1

CURRENT SENSE 3

RT/CT 4

1/2VREF

ERROR

AMPLIFIER

5V REF

S/R

VREF

Good

Logic

1/ 3VREF

U.V.L.O

CURRENT

SENSE

COMPARATOR

1V

R

PWM

LATCH

S

OSCILLATOR

7 Vcc

5 GND

7 Vcc

6 OUTPUT

5 GND

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

2 of 9

QW-R103-002,D

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