SLVUC35A May   2021  – August 2021 TPS25946

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  3. 2Description
  4. 3Schematic
  5. 4General Configurations
    1. 4.1 Physical Access
    2. 4.2 Test Equipment and Set up
      1. 4.2.1 POWER SUPPLIES
      2. 4.2.2 METERS
      3. 4.2.3 OSCILLOSCOPE
      4. 4.2.4 LOADS
  6. 5Test Setup and Procedures
    1. 5.1 Hot Plug Test
    2. 5.2 Startup With a Combination of Capacitive and Resistive Loads
    3. 5.3 Power-Up into Short Test
    4. 5.4 Overvoltage Lockout Test
    5. 5.5 Transient Overload Performance
    6. 5.6 Overcurrent Test
    7. 5.7 Output Hot Short Test
    8. 5.8 USB On-The-Go (OTG) Performance
  7. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  8. 7Bill Of Materials (BOM)
  9. 8Revision History

5.4 Overvoltage Lockout Test

Use the following instructions to perform the overvoltage protection test:

  1. Set the input supply voltage VIN to 12 V and current limit of 10 A. Apply the supply between VIN and PGND at connector J1 and enable the power supply.
  2. Apply a load of 20 Ω between VOUT and PGND at connector J2.
  3. Increase the input supply VIN from 12 V to 16 V, and observe the waveforms using an oscilloscope.

Figure 5-7 shows overvoltage lockout response of TPS25946 eFuse on TPS25946EVM eFuse Evaluation Board.

GUID-20210424-CA0I-BNCS-RTRS-NKNL3DRXFPFS-low.gifFigure 5-7 Overvoltage Lockout Response of TPS25946 eFuse (VIN Ramped Up From 12 V to 16 V, Cout = 220 μF, Rout = 20 Ω, VIN Overvoltage Lockout Threshold Set to 13.2 V)