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User's Guide
SLVUAA4–September 2014
Using the TPS22945EVM-082 Single Channel Current
Limited Load Switch IC
The TPS22945EVM-082 evaluation module (EVM) allows the user to connect power to and control the 5-
pin DCK package load switch. The features of the current limiting switch can be easily evaluated using the
EVM connections. Table 1 lists a short description of the TPS22945 load switch performance
specifications; for additional details on load switch performance, application notes, and the datasheet see
ti.com/loadswitch.
Contents
1 Introduction ................................................................................................................... 2
1.1 Description........................................................................................................... 2
1.2 Features.............................................................................................................. 2
2 Electrical Performance ...................................................................................................... 2
3 Schematic..................................................................................................................... 2
4 Layout ......................................................................................................................... 3
4.1 Setup ................................................................................................................. 4
5 Operation ..................................................................................................................... 5
6 Test Configurations.......................................................................................................... 5
6.1 On-Resistance (R
ON
) Test Setup.................................................................................. 5
6.2 Timing Test Setup .................................................................................................. 6
6.3 Some Examples of TPS22945 Fault Detection Conditions ................................................... 7
7 Bill of Materials (BOM) ...................................................................................................... 8
List of Figures
1 TPS22945EVM-082 Schematic ........................................................................................... 2
2 TPS22945EVM-082 Top Assembly ....................................................................................... 3
3 TPS22945EVM-082 Top Layout........................................................................................... 3
4 TPS22945EVM-082 Bottom Layout....................................................................................... 4
5 R
ON
Setup ..................................................................................................................... 5
6 Typical Timing Setup........................................................................................................ 6
7 TPS22945 Over Current Shutdown (V
IN
= 3.3V)......................................................................... 7
8 TPS22945 Operating in Constant Current Mode with Auto Restart (V
IN
= 3.3V).................................... 7
List of Tables
1 TPS22945 Current Limit, Blanking Time, Enable, and Auto Restart Characteristics............................... 2
2 TPS22945EVM-082 Bill of Materials...................................................................................... 8
1
SLVUAA4–September 2014 Using the TPS22945EVM-082 Single Channel Current Limited Load Switch
IC
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Verzeichnis
- ・ Blockdiagramm on Seite 2
- ・ Anwendungsbereich on Seite 5 Seite 9
