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TPS2001DDGKR Datasheet(PDF) 13 Page - Texas Instruments

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No. de Pieza. TPS2001DDGKR
Descripción  Current Limited, Power-Distribution Switches
Descarga  26 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS2001DDGKR Datasheet(HTML) 13 Page - Texas Instruments

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IN
GND
FAULT
Control
Signal
4.5 V-6.5 V
0.1PF
COUT
Fault
Signal
VOUT
EN
OUT
RFAULT
TPS2001D
4
1/2
5
6/7/8
1
Copyright © 2017, Texas Instruments Incorporated
13
TPS2001D
www.ti.com
SLVSE25A – JULY 2017 – REVISED OCTOBER 2017
Product Folder Links: TPS2001D
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The TPS2001D current-limited power switch uses an N-channel MOSFET in applications requiring continuous
load current. The device enters constant-current mode when the load exceeds the current limit threshold.
9.2 Typical Application
Figure 21. Typical Application Schematic
9.2.1 Design Requirements
For this design example, use the following input parameters:
1. The TPS2001D operates from a 5-V to ±0.5-V input rail.
2. What is the normal operation current, for example, the maximum allowable current drawn by portable
equipment for USB 3.0 port is 900 mA, so the normal operation current is 900 mA, and the minimum current
limit of power switch must exceed 900 mA to avoid false trigger during normal operation.
3. What is the maximum allowable current provided by up-stream power, the maximum current limit of power
switch that must lower it to ensure power switch can protect the up-stream power when overload is
encountered at the output of power switch.
9.2.2 Detailed Design Procedure
To begin the design process a few parameters must be decided upon. The designer must know the following:
1. Normal input operation voltage
2. Output continuous current
3. Maximum up-stream power supply output current
9.2.2.1 Input and Output Capacitance
Input and output capacitance improves the performance of the device; the actual capacitance must be optimized
for the particular application. For all applications, TI recommends placing a 0.1-µF or greater ceramic bypass
capacitor between IN and GND, as close to the device as possible for local noise decoupling.
All protection circuits have the potential for input voltage overshoots and output voltage undershoots.


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