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IL494

更新时间： 2024-09-14 22:48:11

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IL494 数据手册

TECHNICAL DATA

IL494

PWM Control Circuit

The IL494 incorporates on a single monolithic chip all the

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.

ORDERING INFORMATION

IL494N Plastic

•

Complete PWM Power Control Circuitry

IL494D SOIC

T_A= -20°C to 85° C

for all packages

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

PIN ASSIGNMENT

FUNCTION TABLE

Output Control

Grounded

Output Function

Single-ended or Parallel Output

Normal Push-Pull Operation

At V_ref

LOGIC DIAGRAM

12 3 4

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