SLVUC35A May   2021  – August 2021 TPS25946

 

  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 Set up
      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 Hot Plug Test
    2. 5.2 Startup With a Combination of Capacitive and Resistive Loads
    3. 5.3 Power-Up into Short Test
    4. 5.4 Overvoltage Lockout Test
    5. 5.5 Transient Overload Performance
    6. 5.6 Overcurrent Test
    7. 5.7 Output Hot Short Test
    8. 5.8 USB On-The-Go (OTG) Performance
  7. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  8. 7Bill Of Materials (BOM)
  9. 8Revision History

2 Description

The TPS25946EVM eFuse Evaluation Board enables the evaluation of TPS259460x and TPS259461x eFuses from TPS25946 family. This EVM comes with adjustable ITimer, dVdt, ILM, and PGTH settings. The input power is applied at connector J1, while J2 provides the output connection for the EVM; refer to the schematic in Figure 3-1, and EVM test setup in Figure 5-1. TVS diodes U2 and U3 provide input protection from transient overvoltages, while Schottky diode D2 provides output protection for the TPS25946. TVS diode U3 is useful to protect the device during transient caused by short circuit at the connector J1 when power is flowing from OUT (Connector J2) to IN (Connector J1).

S1 allows U1 to be RESET or disabled. A Power Good (PG) indicator is provided by a LED D3. Scaled device current can be monitored at TP8 with a factor of 0.13 V/A.

Table 2-1 TPS25946EVM eFuse Evaluation Board Options and Setting
EVM FunctionVin UVLO ThresholdVin OVLO Threshold

ITimer

Output Slew Rate (dv/dt)

Power Good Threshold (PGTH)

Current Limit
Low SettingHigh Setting
Performance evaluation of TPS25946, 2.7 V to 23 V, 5.5-A eFuse

10.83 V

16.38 V

Selectable - 183 µs, 1.83 ms, and 18.3 ms

Selectable - 0.6 mV/µs, 0.2 mV/µs, and 0.09 mV/µs

Selectable - With respect to Input (VIN) and Output (VOUT)

0.5 A 6 A