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CT

RT

Error

1IN +

Amplifier 1

1IN −

1FEEDBACK

1DTC

1OUT

GND

REF

SCP

2IN +

Error

2IN −

Amplifier 2

2FEEDBACK

2DTC

2OUT

D PACKAGE

(TOP VIEW)

DESCRIPTION/ORDERING INFORMATION

TL1451A-EP

DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS

SLVS614 – DECEMBER 2005

•

Controlled Baseline

•

Variable Dead Time Provides Control Over

Total Range

– One Assembly/Test Site, One Fabrication

Site

•

Internal Regulator Provides a Stable 2.5-V

Reference Supply

•

Enhanced Diminishing Manufacturing

Sources (DMS) Support

•

Enhanced Product-Change Notification

•

•

Complete Pulse-Width Modulation (PWM)

Power-Control Circuitry

•

Completely Synchronized Operation

•

Internal Undervoltage Lockout Protection

•

Wide Supply-Voltage Range

•

Internal Short-Circuit Protection

•

Oscillator Frequency . . . 500 kHz Max

(1)

Component qualification in accordance with JEDEC and

industry standards to ensure reliable operation over an

extended temperature range. This includes, but is not limited

to, Highly Accelerated Stress Test (HAST) or biased 85/85,

temperature cycle, autoclave or unbiased HAST,

electromigration, bond intermetallic life, and mold compound

life. Such qualification testing should not be viewed as

justifying use of this component beyond specified

performance and environmental limits.

The TL1451A-EP 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 TL1451A-EP

contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators,

undervoltage lockout circuitry, and dual common-emitter output transistor circuits.

The uncommitted output transistors provide common-emitter output capability for each controller. The internal

amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time control (DTC) comparator

has no offset unless externally altered and can provide 0% to 100% dead time. The on-chip oscillator can be

locks the outputs off until the internal circuitry is operational.

The TL1451A-EP is characterized for operation from –55

°C to 125°C.

ORDERING INFORMATION

ORDERABLE PART NUMBER

TOP-SIDE MARKING

–55

°C to 125°C

SOIC – D

Tape and reel

TL1451AMDREP

TL1451EPG4

(1)

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

On products compliant to MIL-PRF-38535, all parameters are

Instruments standard warranty. Production processing does not

tested unless otherwise noted. On all other products, production

necessarily include testing of all parameters.

processing does not necessarily include testing of all parameters.