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TPS40192DRCTG4 Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce TPS40192DRCTG4
Description  4.5-V to 18-V Input, 10-Pin, Synchronous Buck Controller With Power Good
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS40192DRCTG4 Fiches technique(HTML) 1 Page - Texas Instruments

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1
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10
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7
HDRV
SW
BOOT
LDRV
ENABLE
FB
COMP
VDD
TPS40192
TPS401923
5
6
BP5
PGD
11
GND
VIN
VOUT
ON/
OFF
External logic
supply 5-V or
less or BP5
VOUT
Copyright © 2016, Texas Instruments Incorporated
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Design
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TPS40192, TPS40193
SLUS719F – MARCH 2007 – REVISED NOVEMBER 2016
TPS4019x 4.5-V to 18-V Input, 10-Pin, Synchronous Buck Controller With Power Good
1
1 Features
1
Input Operating Voltage Range: 4.5 V to 18 V
Up to 20-A Output Currents
Supports Pre-Biased Outputs
0.5%, 591-mV Reference
Switching Frequency
TPS40192: 600 kHz
TPS40193: 300 kHz
Three Selectable Thermally Compensated Short-
Circuit Protection Levels
Hiccup Restart from Faults
Internal 5-V Regulator
High-Side and Low-Side MOSFET ON-resistance
(RDS(on)) Current Sensing
10-Pin 3 mm × 3 mm SON Package
Internal 4-ms Soft-Start Time
Thermal Shutdown Protection at 145°C
2 Applications
Cable Modem CPE
Digital Set Top Box
Graphics/Audio Cards
Entry Level and Mid-Range Servers
3 Description
TPS40192
and
TPS40193
are
cost-optimized
synchronous buck controllers that operate from 4.5 V
to 18 V input. These controllers implement a voltage-
mode
control
architecture
with
the
switching
frequency fixed at either 600 kHz (TPS40192) or 300
kHz (TPS40193). The higher switching frequency
facilitates the use of smaller inductor and output
capacitors, thereby providing a compact power-
supply solution. An adaptive anti-cross conduction
scheme is used to prevent shoot through current in
the power FETs.
Short circuit detection is done by sensing the voltage
drop across the low-side MOSFET when it is on and
comparing it with a user selected threshold of 100
mV, 200 mV or 280 mV. The threshold is set with a
single external resistor connected from COMP to
GND. This resistor is sensed at startup and the
selected threshold is latched. Pulse-by-pulse limiting
(to prevent current runaway) is provided by sensing
the voltage across the high-side MOSFET when it is
on and terminating the cycle when the voltage drop
rises above a fixed threshold of 550 mV. When the
controller
senses
an
output
short
circuit,
both
MOSFETs are turned off and a timeout period is
observed before attempting to restart. This behavior
provides limited power dissipation in the event of a
sustained fault.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS40192
VSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application Diagram


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