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

5.2 Overcurrent Test

Use the following instructions to perform the overcurrent test on the current limit TPS25948 eFuse on channel 1:

  1. Place jumper J8 to the appropriate position to obtain required blanking period as per Table 4-3.
  2. Set the input supply voltage VIN to 12 V and current limit of 9 A and enable the power supply.
  3. Place jumper J6 in good position to set the required current limit as per Table 4-3.
  4. Apply an overload greater than the set current limit between VOUT1 and GND.
  5. The device allows the overload current for the programmed ITIMER period and then starts limiting current.

Figure 5-3 shows an example of the circuit breaker test on the TPS25948EVM.

GUID-20230213-SS0I-TVJQ-W4FC-GNNGJXHXJS5N-low.svg Figure 5-3 Overcurrent Response of TPS25948 for 9-A Current Limit Setting