UNISONIC TECHNOLOGIES CO., LTD

UC3842G

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1 of 8

Copyright © 2012 Unisonic Technologies Co., Ltd

QW-R103-036.C

HIGH PERFORMANCE

CURRENT MODE

CONTROLLER

■

DESCRIPTION

The UTC UC3842G of high performance current mode

controller is specifically designed for off-line and DC-to-DC

converter applications offering the designer a cost effective

solution with minimal external components. This integrated

circuit features approximately 40μA start up current, a precision

reference trimmed the error amplifier input. Also included are

protective

features

consisting

of

input

and

reference

undervoltage lockouts each with hysteresis, cycle-by-cycle

current limiting, and so on.

■

FEATURES

* Low startup and operating current

* User defined switching frequency(Norm is 52kHz)

* Power-saving mode for low power

* Under voltage lockout with hysteresis

* Over voltage protection

* Latching PWM for Cycle-By-Cycle current limiting

* Internally trimmed reference with undervoltage lockout

ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

UC3842GL-S08-R

UC3842GP-S08-R

SOP-8

Tape Reel

UC3842GL-S08-T

UC3842GP-S08-T

SOP-8

Tube

UC3842GL-D08-T

UC3842GP-D08-T

DIP-8

Tube