UNI SONI C TECHNOLOGI ES CO., LTD

UC3842A/3843A

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1 of 9

Copyright © 2017 Unisonic Technologies Co., Ltd

QW-R103-002.I

CU RREN T M ODE PWM

CON T ROL CI RCU I T S



DESCRI PT I ON

The UTC UC3842A/3843A provide the necessary functions to

implement off-line or DC to DC fixed frequency current mode ,

controlled switching circuits with minimal external components.



FEAT U RES

*Low Start Up Current ( Typical 0.12mA )

*Automatic Feed Forward Compensation

*Pulse-by-Pulse Current Limiting

*Under-voltage Lockout with Hysteresis

*Double Pulse Suppression

*High Current Totem Pole Output to Drive MOSFET Directly

*Internally Trimmed Band Gap Reference

*500kHz Operation



ORDERI N G I N FORM AT I ON

Ordering Number

Lead Free

Halogen Free

Package

Packing

UC3842AL-D08-T

UC3842AP-D08-T

DIP-8

Tube

UC3842AL-S08-R

UC3842AP-S08-R

SOP-8

Tape Reel

UC3843AL-D08-T

UC3843AP-D08-T

DIP-8

Tube

UC3843AL-S08-R

UC3843AP-S08-R

SOP-8

Tape Reel



M ARK I N G

Package

UC3842A

UC3843A

DIP-8

UTC

UC3843A

2

3

4

1

5

6

7

8

Date Code

L: Lead Free

P: Halogen Free

Lot Code

SOP-8