SLVUBX8B October   2020  – December 2021 TPS2661

 

  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 Setup
      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 Overload Protection Test
    2. 5.2 Output Short-Circuit Test
    3. 5.3 Input Undervoltage Protection Test
    4. 5.4 Output Undervoltage Protection Test
    5. 5.5 Output Overvoltage Protection Test
    6. 5.6 TPS26612 Overload Protection Test
    7. 5.7 Current Limiting for VIN < –Vs
    8. 5.8 Surge Protection Test (Current Input, CH1)
    9. 5.9 Surge Protection Test (Analog Output, CH2)
  7. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  8. 7Bill Of Materials (BoM)
  9. 8Revision History

5.6 TPS26612 Overload Protection Test

Use the following instructions to evaluate current limit behavior of TPS26612 (U3):

  1. Set the jumper setting J10 in 1–2 position to set MODE = OPEN

  2. Connect a load resistance of 1 kΩ between I_OUT_2 and AGND_2 at connector J9

  3. Adjust potentiometer R12 to set 6V at I_IN_2 (J13/ TP16). This action results in a voltage of 15 V at the input of TPS26612 eFuse (U3)
  4. Now apply load of 5 Ω between I_OUT_2 and AGND_2 to trigger overload fault

  5. Observe the waveforms using an oscilloscope

Figure 5-10 and Figure 5-11 show current limit behavior of TPS26612 captured on the TPS2661EVM eFuse evaluation board.

GUID-20201015-CA0I-TZMH-TTFT-8PVVVG4W1JV2-low.pngFigure 5-10 Current-Limit Behavior of TPS26612
GUID-20201015-CA0I-SBRT-HCLS-SS0Q7NH1VFJ3-low.pngFigure 5-11 Current-Limit Behavior of TPS26612 Under Sustained Overload