SLVUD44A March   2025  – October 2025 TPS1689

 

  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 USB-to-GPIO Interface Adapter
        5. 2.1.2.5 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 Overcurrent Event
      7. 3.1.7 Output Hot Short
      8. 3.1.8 Thermal Performance of TPS1685EVM
  9. 4Using the TPS1689EVM-GUI
    1. 4.1 Access the TPS1689EVM-GUI
    2. 4.2 Introduction to the TPS1689EVM-GUI
    3. 4.3 Establishing Communication Between the EVM and GUI
    4. 4.4 Quick Info
    5. 4.5 Configuration
    6. 4.6 Telemetry
    7. 4.7 Register Map Page
  10. 5Hardware Design Files
    1. 5.1 Schematic
    2. 5.2 PCB Drawings
    3. 5.3 Bill OfmAterials (BOM)
  11.   Trademarks
  12. 6Revision History

1.4 Device Information

The TPS1689EVM enables the evaluation of TPS1689 eFuse. PMBus features can be accessed by communicating with the TPS1689EVM-GUI using the USB-TO-GPIO2 USB interface adapter evaluation module. This EVM has one TPS16890 eFuse (primary device) and one TPS16851 eFuse (secondary device) connected in parallel to evaluate the performance of a 40A Hot Swap design.

The input power is applied across the connectors T1 and T3, while T2 and T3 provide the output connection for the EVM; refer to the schematic in Figure 5-1 and EVM test setup in Figure 3-1. TVS diodes D1 and D2 protect the input from transient overvoltages. Schottky diodes D3 and D4 protect the output by clamping the negative voltage excursion at the OUT pins of TPS1689 and TPS1685 eFuses within their minimum absolute ratings.

SW1 allows to do power cycle and SW2 enables the quick output discharge (QOD). Power Good (PG) and fault (FLTb and FLTb2) indicators are provided by LED DG1, DR1, and DR2, respectively.

Table 1-2 TPS1689EVM eFuse Evaluation Board Options and Settings
ParametersOptions and Settings
VIN UVLO Threshold40V
VIN OVLO Threshold60V in hardware and configurable through PMBus in the range of 16V to 80V with a default value of 60.1V (0xb1 in VIN_OV_FLT (55h) register)
Overcurrent Blanking Timer Duration (tTIMER)Set at 2.1ms (0x14h in OC_TIMER (E6h) register) by default and configurable through PMBus in the range of 0ms to 27.3ms
Output Voltage Slew Rate (dv/dt)Selectable in hardware. 1V/ms, 0.5V/ms, and 0.1V/ms and configurable through PMBus in the range of 25 % to 150 % of nominal slew-rate (Set by hardware) with a default value of 100 % (10b in the 10:9 bits of DEVICE_CONFIG (E4h) register)
Circuit-breaker Threshold (IOCP)Selectable in hardware. 25A and 44A with VIREF of 1V
Active Current Sharing Threshold for TPS1689 eFuse (U1)Selectable in hardware. 25A and 22A of active current sharing threshold with VIREF of 1V
Inrush Current Limit and Active Current Sharing Threshold for TPS1685 eFuse (U2)Selectable in hardware. 25A and 22A of active current sharing threshold with VIREF of 1V
Reference Voltage for Overcurrent Protection and Active Current Sharing (VIREF)Configurable through PMBus in the range of 0.3V to 1.2V with a default value of 1V (0x32h in VIREF (E0h) register)
PMBus Address of TPS1689 eFuse0x40h (7 bit format) with both ADDR0 and ADDR1 pins OPEN