SLUUCK8A December   2021  – December 2022 TPS4811-Q1

 

  1.   TPS48111Q1EVM: Evaluation Module for Smart High-Side Driver TPS48111-Q1
  2.   Trademarks
  3. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  4. 2Description
  5. 3Schematic
  6. 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
  7. 5Test Setup and Procedures
    1. 5.1 Pre-charging Functional Test
    2. 5.2 Power-Up With EN Control
    3. 5.3 ON and OFF Control With INP Input
    4. 5.4 Overcurrent Protection Test
    5. 5.5 Output Hot-Short Test
  8. 6EVAL Board Assembly Drawings
    1. 6.1 PCB Drawings
  9. 7Bill Of Materials (BoM)
  10. 8Revision History

5.4 Overcurrent Protection Test

Use the following instructions to perform the overcurrent test on the TPS48111Q1EVM:

  1. Pre-charge theoutput voltage by following the steps in Pre-charging Functional Test.
  2. Now, enable the control input INP (TP6) of the main MOSFETS.
  3. Disable the pre-charge FET by connecting INP_G (TP24) to ground.
  4. By default, the EVM is configured for 5-A overcurrent protection.
  5. Now, load the output with rheostat or electronic load and gradually increase the load current to observe the overload behavior of TPS48111-Q1.
  6. Place jumper J3 at other settings to test at various overcurrent limits.

Figure 5-7 and Figure 5-8 show test waveforms for an overcurrent fault.

Figure 5-7 Overcurrent Response of TPS48111-Q1 for a Load Step from 2 A to 8 A With 5-A Overcurrent Protection Setting
Figure 5-8 Auto-Retry Response of TPS48111-Q1 for an Overcurrent Fault