SLVUCA4 August   2021 TPS1653

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 REACH Compliance
    2. 1.2 EVM Features
    3. 1.3 Applications
  3. 2Description
  4. 3General Configurations
    1. 3.1 Physical Access
    2. 3.2 Test Equipment
      1. 3.2.1 Power Supplies
      2. 3.2.2 Meters
      3. 3.2.3 Oscilloscope
      4. 3.2.4 Loads
    3. 3.3 Test Setup
    4. 3.4 Test Procedure
      1. 3.4.1 Preliminary Tests
      2. 3.4.2 UVLO Tests
      3. 3.4.3 Current Limit Test with Step Load of 4 A to 7 A
      4. 3.4.4 Output Short-Circuit Protection Test
      5. 3.4.5 Start-Up With Short-Circuit On Output
  5. 4EVM Board Assembly Drawings and Layout
    1. 4.1 PCB Drawings
  6. 5Schematics
  7. 6Bill of Materials

3.4.3 Current Limit Test with Step Load of 4 A to 7 A

Use the following instructions to perform current limit test:

  1. Set the current limit to 4.5 A by installing the J4/J11 jumper in position 1-2.
  2. Set the load resistance to 96 Ω ±1 Ω and the power supply voltage to 58 V.
  3. Enable the load and the power supply.
  4. Decrease the load resistance to set load current of 4 A.
  5. Apply overload of 7 A and verify the device current limit behavior.
  6. The device allows the pulsed overload current of 7 A for a duration of 25 ms before limiting the current to 4.5 A. In this case, the device turns off the internal FET due to thermal shutdown before the expiry of tCL_ILIM(dly).
  7. Place the jumper J4 and J11 at other settings to test at various other current limits.
  8. Disable the power supply and the load.

Figure 3-2 shows current limit behavior for step load of 4 A to 7 A on the TPS1653EVM eFuse Evaluation Board.

GUID-20210805-CA0I-RWTK-FPHT-MKV38ZVF7JJQ-low.pngFigure 3-2 Over Current Response of TPS16530 for 4.5-A Current Limit Setting