UC3842A Fairchild SMPS Controller Data Sheet

Download PDF datasheet for Fairchild Semiconductor UC3842A SMPS Controller (EN) 8 pages Rev.5.0 2000 zip

SKU: UC3842AFAIRCHILDDS2000REV5 Category: Brand:

Description

This PDF datasheet is for the Fairchild UC3842A SMPS Controller.

About the Item

Fairchild Semiconductor UC3842A SMPS Controller

The UC3842A is a fixed PWM controller for Off-Line and DC to DC converter applications. The internal circuits include UVLO, low start up current circuit, temperature compensated reference, high gain error amplifier, current sensing comparator, and high current totem-pole output for driving a POWER MOSFET. Also UC3842A provides low start up current below 0.3mA and short shutdown delay time typ. 100ns. The UC3842A has UVLO threshold of 16V(on) and 10V(off). The UC3842A can operate within 100% duty cycle.

FEATURES
– Low Start Current 0.2mA (typ)
– Operating Range Up To 500KHz
– Cycle by Cycle Current Limiting
– Under Voltage Lock Out With Hysteresis
– Short Shutdown Delay Time: typ.100ns
– High Current Totem-pole Output
– Output Swing Limiting: 22V

(PDF) DATASHEET (ENGLISH)

SUMMARY OF CONTENTS

INTERNAL BLOCK DIAGRAM

UC3842A PINOUT

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS
– Reference Section
– Osillator Section
– Current Sense Section
– Error Amplifier Section
– Output Section
– Under Voltage Lockout Section
– PWM Section
– Total Standby Current

MECHANICAL DIMENSIONS

ORDERING INFORMATION

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