SLVUCW7A September   2024  – April 2025 TPS1685

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 General Configurations
      1. 2.1.1 Physical Access
      2. 2.1.2 Test Equipment and Setup
        1. 2.1.2.1 Power Supplies
        2. 2.1.2.2 Meters
        3. 2.1.2.3 Oscilloscope
        4. 2.1.2.4 Loads
  8. 3Implementation Results
    1. 3.1 Test Setup and Procedures
      1. 3.1.1  Hot Plug
      2. 3.1.2  Start-up with Enable
      3. 3.1.3  Power Up Into Short
      4. 3.1.4  Undervoltage Lockout
      5. 3.1.5  Overvoltage Lockout
      6. 3.1.6  Transient Overload Performance
      7. 3.1.7  Overcurrent Event
      8. 3.1.8  Output Hot Short
      9. 3.1.9  Quick Output Discharge (QOD)
      10. 3.1.10 Thermal Performance of TPS1685EVM
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Drawings
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Revision History

3.1.6 Transient Overload Performance

Use the following instructions to observe the transient overload performance:

  1. Configure the Jumper J2 to an appropriate position to obtain required over-current blanking period (tTIMER) as per 7.
  2. Configure the Jumper J6 position to desired reference voltage for over-current protection and active current sharing as mentioned in 7.
  3. Configure the Jumper J3 in a good position to set required circuit breaker threshold (IOCP) as per 7.
  4. Configure the Jumper J7 in a good position to set the required scalable fast-trip threshold (ISFT) as per 7.
  5. Set the input supply voltage VIN to 54V and the current limit of 100A.
  6. Connect the power supply between VIN (connector T1) and PGND (connector T3) and enable the power supply.
  7. Now apply an overload greater than IOCP and less than ISFT between VOUT (connector T2) and PGND (connector T3) for a time duration less than tTIMER decided by using jumper J2.
  8. Observe the waveforms using an oscilloscope.

The transient overload performance of TPS1685 eFuse on TPS1685EVM with two devices in parallel is shown in Figure 3-7.

TPS1685EVM Transient Overload Performance of TPS1685 eFuse (VIN = 54V, CITIMER = 27nF, COUT = 1mF, RIMON = 1.1kΩ (IOCP = 50A), RIREF = 40.2kΩ (VREF = 1V), and IOUT Ramped from 40A for 10ms to 80A for 10ms)Figure 3-7 Transient Overload Performance of TPS1685 eFuse (VIN = 54V, CITIMER = 27nF, COUT = 1mF, RIMON = 1.1kΩ (IOCP = 50A), RIREF = 40.2kΩ (VREF = 1V), and IOUT Ramped from 40A for 10ms to 80A for 10ms)