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TPS40200_081 Datasheet(PDF) 5 Page - Texas Instruments

Part # TPS40200_081
Description  WIDE INPUT RANGE NON-SYNCHRONOUS VOLTAGE MODE CONTROLLER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS40200_081 Datasheet(HTML) 5 Page - Texas Instruments

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1
2
3
4
SS
COMP
FB
RC
8
7
6
5
ISNS
GDRV
GND
VDD
SS COMP
FB
RC
8
5
7
6
1
4
2
3
ISNS GDRV GND
VDD
TPS40200
www.ti.com ........................................................................................................................................ SLUS659D – FEBRUARY 2006 – REVISED NOVEMBER 2008
Table 1. TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME
NO.
COMP
3
O
Error amplifier output. Connect control loop compensation network from COMP to FB.
FB
4
I
Error amplifier inverting input. Connect feedback resistor network center tap to this pin.
GND
5
Device ground.
GDRV
6
O
Driver output for external P-channel MOSFET
Current-sense comparator input. Connect a current sense resistor between ISNS and VDD in order to set
ISNS
7
I
desired overcurrent threshold.
Switching frequency setting RC network. Connect a capacitor from the RC pin to the GND pin and connect a
resistor from the VDD pin to the RC pin. The device may be synchronized to an external clock by connecting
RC
1
I
an open drain output to this pin and pulling it to GND. For mor info on pulse width for synchronization,
please refer to the Synchronizing the Oscillator section.
Soft-start programming pin. Connect capacitor from SS to
SS
2
I
GND to program soft start time. Pulling this pin below 150 mV causes the output switching to stop, placing
the device in a shutdown state. The pin also functions as a restart timer for overcurrent events.
VDD
8
I
System input voltage. Connect local bypass capacitor from VDD to GND.
QFN (DRB) PACKAGE (BOTTOM VIEW)
SOIC (D) PACKAGE (TOP VIEW)
Copyright © 2006–2008, Texas Instruments Incorporated
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