Datasheet > TL494

TL494

更新时间： 2024-11-21 03:59:31

品牌	Logo	应用领域
韩国泰进 - HTC		开关光电二极管
页数	文件大小	规格书
6页	102K
描述
Pulse-Width-Modulation Control Circuits

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中文翻译

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TL494 数据手册

Pulse-Width-Modulation Control Circuits

TL494

SOP16/DIP16

(TOP VIEW)

FEATURES

● Complete PWM Power Control Circuitry

NONINV

INPUT

NONINV

Error

● Uncommitted Outputs for 200 Ma Sink or Source Current

INPUT

AMP 1

AMP 2

● Output Control Selects Single-Ended or Push-Pull Operation

INV INPUT

REF OUT

● Internal Circuitry Prohibits Double Pulse at Either Output

● Variable Dead-Time Provides Control over Total Range

● Internal Regulator Provides a Stable 5-V Reference Supply,5%

● Circuit Architecture Allows Easy Synchronization

FEEDBACK

DEAD-TIME

CONTROL

OUTPUT

CONTROL

Vcc

GND

DESCRIPTION

The TL494 incorporate on a single monolithic chip all the functions

required in the construction of a pulse-width-modulation control,

these devices offer the systems engineer the flexibility to tailor

the power supply control circuitry to his application.

ORDERING INFORMATION

Device

TL494D

TL494N

Package

16 SOP

18 DIP

The TL494 contains an error amplifier, an on-chip adjustable

oscillator, a dead-time control comparator, pulse-steering control

flip-flop, a 5-volt, 5% precision regulator, and output-control circuit.

The error amplifier exhibits a common-mode voltage range from -0.3 volts to Vcc -2 volts. The dead-time control

comparator has a fixed offset that provides approximately 5% dead time when externally altered. The on-chip

oscillator may be bypassed by terminating R_T(pin 6) to the reference output and providing a sawtooth in put to

CT (pin 5), or it may be used to drive the common circuits in synchronous multiple-rail power supplies. The

uncommited output transistors provide either common-emitter or emitter-follower output capability. Each Device

provides for push-pull or single-ended output operation, which may be selected through the output-control funct

-ion. The architecture of these devices prohibits the possibility of either output being pulsed twice during push

-pull operation.

Functional Block Diagram

OUTPUT CONTROL

R_T

OSCILLATOR

C_T

DEAD

DEAD-TIME CONTROL COMPARATOR

0.1V

TIME

CONTROL

PULSE-STEERING FLIP-FLOP

PWM COMPARATOR

ERROR AMPLIFIER

NONINVERTING INPUT

INVERTING INPUT

Vcc

Vref

GND

ERROR AMPLIFIER

REFERENCE

NONINVERTING INPUT

INVERTING INPUT

FEEDBACK

Mar. 2006-Rev06

HTC

145

12 3 4 5 6

中文翻译

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