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TPS4009 Datasheet(PDF) 3 Page - Texas Instruments

No. de pieza TPS4009
Descripción Electrónicos  Wide Input Range Non-Synchronous Voltage Mode Controller
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS4009 Datasheet(HTML) 3 Page - Texas Instruments

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SS
COMP
FB
RC
8
5
7
6
1
4
2
3
ISNS GDRV GND
VDD
1
2
3
4
SS
COMP
FB
RC
8
7
6
5
ISNS
GDRV
GND
VDD
TPS40200
www.ti.com
SLUS659G – FEBRUARY 2006 – REVISED NOVEMBER 2014
5 Pin Configuration and Functions
8 PINS
8 PINS
VSON (DRB) PACKAGE
SOIC (D) PACKAGE
(BOTTOM VIEW)
(TOP VIEW)
Pin Functions
PIN
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 GND to program soft start time. Pulling this pin
SS
2
I
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.
Copyright © 2006–2014, Texas Instruments Incorporated
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Product Folder Links: TPS40200


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