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5.1 Hot-Plug Test
Use the following instructions to measure the inrush current during the Hot-Plug event on channel 1:
1. Set jumper J5 position to the desired slew rate as mentioned in
2. Set the input supply voltage VIN to 12 V and current limit of 9 A. Enable the power supply.
3. Hot-plug the supply between VIN1 and PGND1 points of connector J2.
4. Observe the waveform at VOUT1 (TP2) and input current with an oscilloscope to measure the slew rate and
rise time of the eFuse with a given input voltage of 12 V.
Figure 5-2
shows an example of inrush current captured on the TPS25948EVM eFuse evaluation board.
Figure 5-2. TPS25948 Output Rise Profile (VIN = 12 V, Cout = 220 µF, CdVdT = OPEN, R
SLVUCK4A – MARCH 2023 – REVISED JULY 2023
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Test Setup and Procedures
Table
4-3.
TPS25948EVM Evaluation Module for TPS25948 eFuse
= 536 Ω, No
ILM
9
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