SLVUCH1A June   2022  – December 2022 TPS1641

 

  1.   TPS1641EVM: Evaluation Module for eFuse TPS1641
  2.   Trademarks
  3. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  4. 2Description
  5. 3Schematic
  6. 4General Configurations
    1. 4.1 Physical Access
    2. 4.2 Test Equipment and Setup
      1. 4.2.1 Power Supplies
      2. 4.2.2 Meters
      3. 4.2.3 Oscilloscope
      4. 4.2.4 Loads
  7. 5Test Setup and Procedures
    1. 5.1 Hot-Plug Test
    2. 5.2 Power Limit Test
    3. 5.3 Current Limit Test
    4. 5.4 Overvoltage Protection Test
    5. 5.5 Output Hot-Short Test
    6. 5.6 IN to OUT Short Detection Test
  8. 6EVAL Board Assembly Drawings
    1. 6.1 PCB Drawings
  9. 7Bill of Materials (BOM)
  10. 8Revision History

5.6 IN to OUT Short Detection Test

Use the following instructions to perform IN-OUT short detection test on CH2:

  1. Make J10 OPEN.

  2. Short Q1 with a cable to bypass the external PFET.

  3. Set the input supply voltage VIN to 24 V and current limit of 2 A. Apply the supply at input terminal T3 and enable the power supply.

  4. Apply a load of 1 A at the output.

  5. Short the IN-OUT of TPS16412 by placing shunt on J9.

  6. Observe the TPS16412 response. As seen in Figure 5-8, the FLTb asserts after 150 ms (typical) after IN-OUT short is detected. Note that the VOUT is probed in AC coupling mode to observe the jump in the voltage for IN-OUT short.

  7. Now, disable the supply and the load.
  8. Remove the short across Q1 to enage external PFET in the circuit.
  9. Enable the power supply.

  10. Apply a load of 1 A at the output.

  11. Short the IN-OUT of TPS16412 by placing shunt on J9.

  12. The TPS16412 detects the IN-OUT short and asserts the FLTb, which in turn disables the external PFET to isolate the load from the supply. Figure 5-9 shows the IN-OUT short response with external PFET in the circuit.

Figure 5-8 IN to OUT Short Response of the TPS1641 Device without External PFET

Figure 5-9 IN to OUT Short Response of the TPS1641 Device with External PFET