LM494CN datasheet(1/8 Pages) NSC

Part #	LM494CN

Description	Pulse Width Modulated Control Circuit

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Manufacturer	NSC [National Semiconductor (TI)]

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TLH10056

June 1989

LM494

Pulse Width Modulated Control Circuit

General Description

The LM494 is a monolithic integrated circuit which includes

all the necessary building blocks for the design of pulse

width modulated (PWM) switching power supplies including

push-pull bridge and series configurations The device can

operate at switching frequencies between 10 kHz and

300 kHz and output voltages up to 40V The operating tem-

perature range specified for the LM494C is 0 Cto70 C and

for the LM494V is b40 Cto a85 C

Features

Y

Uncommitted output transistors capable of 200 mA

source or sink

Y

On-chip error amplifiers

Y

On-chip 50V reference

Y

Internal protection from double pulsing of outputs with

narrow pulse widths or with supply voltages below

specified limits

Y

Dead time control comparator

Y

Output control selects single ended or push-pull opera-

tion

Y

Easily synchronized (slaved) to other circuits

Block Diagram

TLH10056 – 2

Connection Diagram

16-Lead DIP

TLH10056 – 1

Top View

Ordering Information

Device

Package

Code

Description

LM494IN

N16A

Molded DIP

LM494CJ

J16A

Ceramic DIP

LM494CN

N16A

Molded DIP

C1995 National Semiconductor Corporation

RRD-B30M115Printed in U S A

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LM494CN Datasheet(PDF) 1 Page - National Semiconductor (TI)

LM494CN Datasheet(HTML) 1 Page - National Semiconductor (TI)

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