UNISONIC TECHNOLOGIES CO., LTD

UC3842G

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2007 Unisonic Technologies Co., Ltd

QW-R103-036.A

HIGH PERFORMANCE

CURRENT MODE CONTROLLER

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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.

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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

*Pb-free plating product number:

UC3842GL

ORDERING INFORMATION

Ordering Number

Normal

Lead Free Plating

Package

Packing

UC3842G-D08-T

UC3842GL-D08-T

DIP-8

Tube

UC3842G-S08-R

UC3842GL-S08-R

SOP-8

Tape Reel

UC3842G-S08-T

UC3842GL-S08-T

SOP-8

Tube

UC3842GL-D08-T

(1)Packing Type

(2)Package Type

(3)Lead Plating

(1) T: Tube, R: Tape Reel

(2) D08: DIP-8, S08: SOP-8

(3) L: Lead Free Plating, Blank: Pb/Sn