UNISONIC TECHNOLOGIES CO., LTD

UC3842G

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1 of 8

Copyright © 2008 Unisonic Technologies Co., Ltd

QW-R103-036.B

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 300μA 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

Lead-free:

UC3842GL

Halogen-free: UC3842GP

ORDERING INFORMATION

Ordering Number

Normal

Lead Free

Halogen Free

Package

Packing

UC3842G-S08-R

UC3842GL-S08-R

UC3842GP-S08-R

SOP-8

Tape Reel

UC3842G-S08-T

UC3842GL-S08-T

UC3842GP-S08-T

SOP-8

Tube

UC3842G-D08-T

UC3842GL-D08-T

UC3842GP-D08-T

DIP-8

Tube