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TPS40132RHBT Datasheet(PDF) 9 Page - Texas Instruments

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Part # TPS40132RHBT
Description  TWO-PHASE, SYNCHRONOUS BUCK CONTROLLER WITH INTEGRATED MOSFET DRIVERS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS40132RHBT Datasheet(HTML) 9 Page - Texas Instruments

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13
20
6
7
U4
PWM
LOGIC
16
BP8
AGND
CS1
CSRT1
FB
PWM1
5 mA
TPS40132RHB
3
4
5
9
VOUT
GSNS
DIFFO
VREF
10
11
23
8
+EA
FB
SS
COMP
19
18
15
22
CS2
CSRT2
ILIM
UVLO
14
17
2
EN/SYNC
RT
OVSET
+
+
+
U9
ICTLR
U1
U7
U12
+
U18
0.6 V
Ramp1
U2
PWM2
U19
OC/UV
Detect
+
U3
+
U15
PGOOD
VIN5
BP5
U23
Clock
U22
Power-On Reset
U25
OV Detect
U24
Ramp Gen
Ramp1
Ramp2
U20
SS
UV
OV
OC
27
LDRV2
U21
U17
25
HDRV2
24
BOOT2
26
SW2
VIN5
29
LDRV1
30
VIN5
28
PGND
U10
U5
Anti
Cross
Conduction
32
HDRV1
1
BOOT1
31
SW1
U6
U16
Anti
Cross
Conduction
Ramp2
U14
20 kW
100 ns
Delay
BP8
20 kW
20 kW
20 kW
21
BP5
12
VDD
LDO
UDG-08002
FUNCTIONAL DESCRIPTION
TPS40132
SLUS776A – DECEMBER 2007 – REVISED FEBRUARY 2008
FUNCTIONAL BLOCK DIAGRAM
The TPS40132 uses programmable fixed-frequency, peak current mode control with forced phase current
balancing. Phase current is sensed by using either the DCR (direct current resistance) of the filter inductors or
current sense resistors installed in series with output. The first method involves generation of a current signal
with an R-C circuit (shown in the applications diagram). The R-C values are selected by matching time constants
of the RC circuit and the inductor time constant, R
×C = L/DCR. With either current sense method, the current
signal is amplified and superimposed on the amplified voltage error signal to provide current mode PWM control.
Other features include: a true differential output sense amplifier, programmable current limit, programmable
output over-voltage set-point, capacitor set soft-start, power good indicator, programmable input undervoltage
lockout (UVLO), user programmable operation frequency for design flexibility, external synchronization capability,
programmable pulse-by-pulse overcurrent protection, output undervoltage shutdown and restart.
Copyright © 2007–2008, Texas Instruments Incorporated
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9
Product Folder Link(s) :TPS40132


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