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TPS40055 Datasheet

  • TPS40055

  • 寬輸入 (8V-40V) 最高頻率 1MHz 的同步降壓控制器，具有輸出驅(qū)動...

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  • 34頁

  • TI

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TPS40054
TPS40055
TPS40057
8
SLUS593B 鈭?DECEMBER 2003 鈭?REVISED APRIL 2004
WIDE INPUT SYNCHRONOUS
BUCK CONTROLLER
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
D
D
D
D
D
D
D
D
D
Voltage Mode Controller
Internal Gate Drive Outputs for High-Side and
Synchronous N-Channel MOSFETs
16-Pin PowerPADt Package (胃
JC
= 2擄C/W)
Thermal Shutdown
Externally Synchronizable
Programmable High-Side Current Limit
Programmable Closed-Loop Soft-Start
TPS40054 Source Only
TPS40055 Source/Sink
TPS40057 Source/Sink With V
OUT
Prebias
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.
APPLICATIONS
D
Power Modules
D
Networking/Telecom
D
Industrial
D
Servers
SIMPLIFIED APPLICATION DIAGRAM
TPS4005xPWP
1
2
KFF
RT
BP5
SYNC
SGND
SS/SD
VFB
COMP
ILIM
VIN
BOOST
HDRV
SW
BP10
LDRV
PGND
16
15
14
13
12
VIN
3
4
5
6
7
8
+
11
10
9
VOUT
鈭?/div>
UDG鈭?3179
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
錚?/div>
2004, Texas Instruments Incorporated
www.ti.com
1

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