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

5.3 Power-Up into Short Test

Use the following instructions to perform the power-up into short test:

  1. Set the input supply voltage VIN to 12 V and current limit of 10 A. Keep the power supply OFF.
  2. Short the output of the device. For example, VOUT to PGND with a shorter cable.
  3. Keep the TPS25946 eFuse disabled by pushing the switch S1.
  4. Turn ON the power supply.
  5. Enable the TPS25946 eFuse by releasing the switch S1.

Figure 5-5 and Figure 5-6 show the test waveforms of power-up into output short on the TPS25946EVM eFuse Evaluation Board for TPS259460x and TPS259461x variants respectively.

GUID-20210720-CA0I-RKRM-SB0N-VJCLB6X7PHWF-low.gif Figure 5-5 Power-Up into Output Short Response of TPS259460x eFuse (VIN Stepped Up From 0 V to 12 V, RILM = 549 Ω, CITimer = 2.2 nF, OUT Shorted to PGND)
GUID-20210720-CA0I-CNVK-SVKW-M8TZ0DFZJMKJ-low.gif Figure 5-6 Power-Up into Output Short Response of TPS259461x eFuse (VIN = 12 V, RILM = 549 Ω, CITimer = 2.2 nF, OUT Shorted to PGND, VEN/UVLO Stepped Up From 0 V to 1.3 V)