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

5.2 Startup With a Combination of Capacitive and Resistive Loads

Use the following instructions to power-up the TPS259460x and TPS259461x eFuses with capacitive and resistive loads:

  1. Set Jumper J4 position to desired slew rate as mentioned in Table 4-3.
  2. Set the input supply voltage VIN to 12 V and current limit of 10 A.
  3. Connect a load of 5 Ω between VOUT and PGND points of connector J2.
  4. Connect the input supply between VIN and PGND points of connector J1. Enable the power supply.
  5. Observe the waveform at VOUT (TP2) and input current with an oscilloscope to measure the slew rate and rise time of the eFuse with a given input voltage of 12 V.

Figure 5-4 shows the startup profile of TPS25946 eFuse with a combination of capacitive and resistive loads.

GUID-20210424-CA0I-Z2VL-WCHC-CW9TKJD6K4BX-low.gif Figure 5-4 TPS259460x Startup Profile With a Combination of Capacitive and Resistive Load (VIN = 12 V, Cout = 470 µF, Rout = 5 Ω, CdVdt = 3300 pF)