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TPS40054 Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS40054 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 33 page TPS40054 TPS40055 TPS40057 SLUS593B − DECEMBER 2003 − REVISED APRIL 2004 WIDEINPUT SYNCHRONOUS BUCK CONTROLLER 8 1 www.ti.com FEATURES D Operating Input Voltage 8 V to 40 V D Input Voltage Feed-Forward Compensation D < 1 % Internal 0.7-V Reference D Programmable Fixed-Frequency Up to 1 MHz Voltage Mode Controller D Internal Gate Drive Outputs for High-Side and Synchronous N-Channel MOSFETs D 16-Pin PowerPADt Package (θJC = 2°C/W) D Thermal Shutdown D Externally Synchronizable D Programmable High-Side Current Limit D Programmable Closed-Loop Soft-Start D TPS40054 Source Only D TPS40055 Source/Sink D TPS40057 Source/Sink With VOUT Prebias APPLICATIONS D Power Modules D Networking/Telecom D Industrial D Servers DESCRIPTION The TPS4005x is a family of high-voltage, wide input (8 V to 40 V), synchronous, step-down converters. The TPS4005x family offers design flexibility with a variety of user programmable functions, including soft-start, UVLO, operating frequency, voltage feed- forward, high-side current limit, and loop compensation. The TPS4005x are also synchronizable to an external supply. They incorporate MOSFET gate drivers for external N-channel high-side and synchronous rectifier (SR) MOSFETs. Gate drive logic incorporates anti-cross conduction circuitry to prevent simultaneous high-side and synchronous rectifier conduction. The TPS4005x uses voltage feed-forward control techniques to provide good line regulation over the wide (4:1) input voltage range, and fast response to input line transients with near constant gain with input variation which eases loop compensation. The externally programmable current limit provides pulse-by-pulse current limit, as well as hiccup mode operation utilizing an internal fault counter for longer duration overloads. SIMPLIFIED APPLICATION DIAGRAM VOUT VIN UDG−03179 5 13 12 16 15 1 2 3 KFF RT BP5 SGND VIN HDRV SW BP10 4 SYNC 11 ILIM TPS4005xPWP 6 SS/SD 7 VFB 8 COMP 14 BOOST LDRV 10 PGND 9 + − 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. Copyright 2004, Texas Instruments Incorporated |
Numéro de pièce similaire - TPS40054 |
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Description similaire - TPS40054 |
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