Table of Contents
Advertisement
www.ti.com
VIN
VOUT
PG
Input
Current
V
= 12 V, EN stepped up from 0 V to 3 V, R
IN
R
= 680 Ω, R
= 40.2 kΩ, C
LIMI2
IREF
Ω, and C
= 33 nF
DVDT
Figure 5-6. Start-Up With Current Limit Response
of TPS25984 eFuse
5.4 Power Up Into Short
Use the following instructions to perform the power up into short test:
1. Set the input supply voltage VIN to 12 V and current limit to 100 A. Connect the supply between VIN
(Connector T1) and PGND (Connector T3) and keep the power supply OFF.
2. Short the output of the EVM. For example, VOUT (Connector T2) to PGND (Connector T3) through a short
and thick cable to make sure the short-circuited path impedance is minimum as possible.
3. Configure the Jumper J6 position to desired reference voltage for overcurrent protection and active current
sharing as mentioned in
4. Configure the jumpers J5 and J7 positions to the desired current limits during start-up as mentioned in
4-3.
5. Keep the TPS25984 eFuses disabled by pushing the switch SW1.
6. Turn ON the power supply.
7. Enable the TPS25984 eFuse by releasing the switch SW1.
Figure 5-8
and
Figure 5-9
Evaluation Board with two (2) devices in parallel.
During power up into short, a thermal fold-back results in the current flowing through the device being
less than the calculated value of the current limit during start-up.
SLVUCH6A – JULY 2023 – REVISED NOVEMBER 2023
Submit Document Feedback
= 680 Ω,
ILIM
= 18.47 mF, R
= 0.9
OUT
LOAD
Table
4-3.
show the test waveforms of power up into output short on the TPS25984EVM eFuse
Copyright © 2023 Texas Instruments Incorporated
VIN
VOUT
PG
Input
Current
V
= 12 V, EN stepped up from 0 V to 3 V, R
IN
R
= 402 Ω, R
= 40.2 kΩ, C
ILIM2
IREF
Ω, and C
= 33 nF
DVDT
Figure 5-7. Start-Up With Output Slew Rate Control
(Only) Response of TPS25984 eFuse
Note
Test Setup and Procedures
= 402 Ω,
ILIM
= 18.47 mF, R
OUT
LOAD
Table
TPS25984 Evaluation Module (EVM)
= 0.9
11
Advertisement
Table of Contents
