Texas Instruments TPS25980, Руководство пользователя, Страница: 8 / 23

Test Setup and Procedures
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8 SLUUCB4 – June 2020
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TPS25980EVM: Evaluation Module for TPS25980x efuse
5.2 Current Limit Test
Use the following instructions to perform current limit test:
1. Place jumper J9 in 3-4 Position to set 2 ms for ITIMER.
2. Set the input supply voltage VIN to 12 V and current limit of 15 A and enable the power supply.
3. Place jumper J10 in 7-8 Position to set 8 A current limit.
4. Set the electronic load to 6 A and connect between VOUT and GND. Enable the electronic load.
5. Now apply overload of 4 A (using resistive load of 3 Ohm) between VOUT and GND.
6. The device allows the overload current for the programmed ITIMER period for example, 2 ms and then
switches OFF.
7. Place jumper J10 at other settings to test at various current limits.
Figure 4 shows an example of current limit at 8 A on the TPS25980EVM eFuse Evaluation Board.
Figure 4. Over Current Response of TPS259804O for 8 A Current Limit Setting