TL1451A-Q1 Datasheet, PDF (1/24 Pages) Texas Instruments – DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS

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TL1451A-Q1
DUAL PULSEĆWIDTHĆMODULATION CONTROL CIRCUITS
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SGLS304A − JUNE 2005 − REVISED JUNE 2008
D Qualified for Automotive Applications
D Complete PWM Power Control Circuitry
D Completely Synchronized Operation
D Internal Undervoltage Lockout Protection
D Wide Supply Voltage Range
D Internal Short-Circuit Protection
D Oscillator Frequency . . . 500 kHz Max
D Variable Dead Time Provides Control Over
Total Range
D Internal Regulator Provides a Stable 2.5-V
Reference Supply
D Available in Q-Temp Automotive
HighRel Automotive Applications
Configuration Control / Print Support
Qualification to Automotive Standards
PW PACKAGE
(TOP VIEW)
CT 1
RT 2
ERROR 1IN + 3
AMPLIFIER 1 1IN − 4
1FEEDBACK 5
1DTC 6
1OUT 7
GND 8
16 REF
15 SCP
14 2IN + ERROR
13 2IN − AMPLIFIER 2
12 2FEEDBACK
11 2DTC
10 2OUT
9 V_CC
description
The TL1451A 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
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 operated by terminating RT and CT. During low V_CC conditions, the undervoltage lockout
control circuit feature locks the outputs off until the internal circuitry is operational.
The TL1451A is characterized for operation from − 40°C to 125°C.
AVAILABLE OPTIONS^{
PACKAGED DEVICES^}
TA
TSSOP
(PW)§
−40°C to 125°C
TL1451AQPWRQ1
† _{For the most current package and ordering information, see the}
Package Option Addendum at the end of this document, or see the TI
web site at http://www.ti.com.
‡ _{Package drawings, thermal data, and symbolization are available at}
http://www.ti.com/packaging.
§ _{The PW package is only available left-end taped and reeled.}
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.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright  2008, Texas Instruments Incorporated
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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