Use the following instructions to perform the overcurrent test on TPS25946 eFuse:

1. Place jumper J5 to an appropriate position to obtain required blanking period as per Table 4-3.
2. Place jumper J6 in a suitable position to set required current limit as per Table 4-3.
3. Set the input supply voltage VIN to 12 V and current limit of 10 A and enable the power supply.
4. Now apply an overload greater than the set current limit (using jumper J6) between VOUT and PGND (use a resistive load to apply overcurrent).
5. The device responds to output overcurrent condition by actively limiting the current after a user adjustable transient fault blanking interval, set by using jumper J5. During active current limit, the output voltage will drop resulting in increased device power dissipation. If the device internal temperature exceeds the thermal shutdown threshold, the device will turn off.

Figure 5-9, Figure 5-10, and Figure 5-11 show the current limit behaviors of TPS25946 eFuse at different overcurrent fault durations and with different variants.

Figure 5-9 Current Limit Response of TPS259460x (VIN = 12 V, CITimer = 2.2 nF, Cout = 220 μF, RILM = 549 Ω, IOUT Stepped From 3 A to 9 A for 4.7 ms)

Figure 5-10 Current Limit Response of TPS259460x (VIN = 12 V, CITimer = 2.2 nF, Cout = 220 μF, RILM = 549 Ω, IOUT Stepped From 3 A to 9 A for 8 ms)

Figure 5-11 Current Limit Response of TPS259461x (VIN = 12 V, CITimer = 2.2 nF, Cout = 220 μF, RILM = 549 Ω, IOUT Stepped From 0 A to 10 A for 8 ms)