UNISONIC TECHNOLOGIES CO., LTD

TL1451

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1 of 14

Copyright © 2008 Unisonic Technologies Co., LTD

QW-R103-011.D

DUAL

PULSE-WIDTH-MODULATION

CONTROL CIRCUITS

DESCRIPTION

The UTC TL1451 incorporates on a single monolithic chip

all

the

functions

required

in

the

construction

of

two

pulse-width-modulation (PWM) control circuits. Designed primarily

for power supply control, the UTC TL1451 contains an on-chip

2.5V regulator, two error amplifiers, an adjustable oscillator, two

dead-time comparators, undervoltage lockout circuitry, and dual

common –emitter output transistor circuits.

FEATURES

*Complete PWM power control circuitry

*Completely synchronized operation

*Internal undervoltage lockout protection

*Wide supply voltage range

*Internal Short-Circuit protection

*Oscillator frequency 500kHz max

*Variable dead time provides control over total range

*Internal regulator provides a stable 2.5V reference supply

DIP-16

SOP-16

TSSOP-16

Lead-free:

TL1451L

Halogen-free: TL1451G

ORDERING INFORMATION

Ordering Number

Normal

Lead Free

Halogen Free

Package

Packing

TL1451-S16-R

TL1451L-S16-R

TL1451G-S16-R

SOP-16

Tape Reel

TL1451-S16-T

TL1451L-S16-T

TL1451G-S16-T

SOP-16

Tube

TL1451-P16-R

TL1451L-P16-R

TL1451G-P16-R

TSSOP-16

Tape Reel

TL1451-P16-T

TL1451L-P16-T

TL1451G-P16-T

TSSOP-16

Tube

TL1451-D16-T

TL1451L-D16-T

TL1451G-D16-T

DIP-16

Tube