IL494N Integral Corp., IL494N Datasheet

IL494N

Manufacturer Part Number

IL494N

Description

PWM control circuit

Manufacturer

Integral Corp.

Datasheet

1.IL494N.pdf (4 pages)

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Download datasheet (173Kb)

PWM Control Circuit

functions required in the construction of a pulse-width-modulation

control circuit. Designed primarily for power supply control, the IL494

contains an on-chip 5-volt regulator, two error amplifiers, adjustable

oscillator, dead-time control comparator, pulse-steering flip-flop, and

output-control circuitry. The uncommitted output transistors provide

either common-emitter or emitter-follower output capability. Push-pull

or single-ended output operation may be selected through the output-

control function. The architecture of the IL494 prohibits the possibility

of either output being pulsed twice during push-pull operation.

The IL494 incorporates on a single monolithic chip all the

Complete PWM Power Control Circuitry

Uncommitted Outputs for 200 mA Sink or Source

Output Control Selects Single-Ended or Push-Pull Operation

Internal Circuitry Prohibits Double Pulse at Either Output

Internal Regulator Provides a Stable 5 V Reference Supply

Variable Dead-Time Provides Control Over Total Range

Output Control

Grounded

At V

ref

FUNCTION TABLE

Single-ended or Parallel Output

Normal Push-Pull Operation

Output Function

LOGIC DIAGRAM

ORDERING INFORMATION

PIN ASSIGNMENT

TECHNICAL DATA

IL494

IL494N Plastic

for all packages

IL494D SOIC

= -20 C to 85 C

Related parts for IL494N

IL494N Summary of contents

Page 1

... Variable Dead-Time Provides Control Over Total Range FUNCTION TABLE Output Control Output Function Grounded Single-ended or Parallel Output At V Normal Push-Pull Operation ref LOGIC DIAGRAM TECHNICAL DATA IL494 ORDERING INFORMATION IL494N Plastic IL494D SOIC for all packages PIN ASSIGNMENT 1 ...

Page 2

IL494 MAXIMUM RATINGS Symbol V Supply Voltage CC V Amplifier Input Voltage I V Collector Output Voltage O Collector Output Current Tstg Storage Temperature RECOMMENDED OPERATING CONDITIONS Symbol V Supply Voltage CC V Amplifier Input Voltage I V Collector Output ...

Page 3

ELECTRICAL CHARACTERISTICS Symbol Parameter Reference Section V Output Voltage ref V Output regulation regin V Input regulation regout Output Voltage change with V ref temperature I Short-circuit output current SC (Note 1) Oscillator Section f Frequency OSC Standard deviation of ...

Page 4

IL494 ELECTRICAL CHARACTERISTICS Symbol Parameter PWM Comparator Section V Input threshold voltage THP (pin 3) I Input sink current (pin 3) I Switching Characteristics t Output voltage rise time rc t Output voltage fall time fc t Output voltage rise ...

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