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TPS40054 Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce TPS40054
Description  WIDE INPUT SYNCHRONOUS BUCK CONTROLLER
Download  33 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS40054 Fiches technique(HTML) 1 Page - Texas Instruments

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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


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