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KK494

更新时间： 2022-04-23 23:00:11

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KK494 数据手册

TECHNICAL DATA

KK494

PWM Control Circuit

The KKK494 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 KK494 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 KK494 prohibits the possibility of either output being

pulsed twice during push-pull operation.

•

Complete PWM Power Control Circuitry

ORDERING INFORMATION

KK494N Plastic

KK494D 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 5

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