SLVUCK4A march   2023  – july 2023 TPS25948

 

  1.   1
  2.   TPS25948EVM: Evaluation Module for TPS25948 eFuse
  3.   Trademarks
  4. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  5. 2Description
  6. 3Schematic
  7. 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
  8. 5Test Setup and Procedures
    1. 5.1 Hot-Plug Test
    2. 5.2 Overcurrent Test
    3. 5.3 Output Hot-Short Test
    4. 5.4 Wakeup into Short Test
    5. 5.5 Overvoltage Test
    6. 5.6 Priority Power Mux Test
  9. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  10. 7Bill Of Materials (BOM)
  11. 8Revision History

5.5 Overvoltage Test

Use the following instructions to perform the overvoltage protection test on channel 1:

  1. Remove the input TVS diodes.
  2. Place jumper J4 in position 1-2 and J7 in a good position to set the required OVLO threshold as per Table 4-3. For example, consider setting 1-2 to set threshold as 13.8 V.
  3. Set the input supply voltage VIN to 12 V and current limit of 9 A. Apply the supply between VIN1 and PGND1 at connector J2 and enable the power supply.
  4. Increase the input supply VIN from 12 V to 15 V and observe the waveforms using an oscilloscope.

Figure 5-6 shows overvoltage response of TPS25948 on the TPS25948EVM eFuse evaluation board.

GUID-20230213-SS0I-V8VP-WTC7-K2TDN67WKBG8-low.svg Figure 5-6 Overvoltage Protection Response of the TPS25948 Device