Use the following instructions to perform the overcurrent test on TPS25984 eFuse:
- Configure the Jumper J3 to an appropriate position to obtain required overcurrent blanking
period (tTIMER) as per 6.
- Configure the Jumper J6 position to desired reference voltage for overcurrent protection and
active current sharing as mentioned in 6.
- Configure the Jumper J4 in a good position to set
required circuit breaker threshold (IOCP) as per 6.
- Connect an electronic load (capable of applying
load transients of up to 200 A) between VOUT (Connector T2) and PGND (Connector
T3) and leave the load disabled.
- Set the input supply voltage VIN to 12 V and current limit of 200 A.
- Connect the power supply between VIN (Connector T1) and PGND (Connector T3) and enable the power
supply.
- Now apply an overload using the electronic load in the range of IOCP <
ILOAD < 2 × IOCP for a time duration more than
tTIMER decided by using jumper J3.
- Observe the waveforms using an oscilloscope.
Figure 5-13 and Figure 5-14 show the circuit breaker response of TPS25984 eFuse on
TPS25984EVM eFuse evaluation board with two (2) devices in parallel.
![TPS25984EVM TPS25984 Overcurrent Performance of TPS25984
eFuse-1 GUID-5D290826-BD36-4BD4-8BE6-E1B4F78EA562-low.svg](/ods/images/SLVUCH6A/GUID-5D290826-BD36-4BD4-8BE6-E1B4F78EA562-low.svg)
VIN = 12 V,
CITIMER = 22 nF, COUT = 470 μF, RIMON =
1.1 ∥ 1.1 kΩ, RIREF = 40.2 kΩ, IOUT ramped from 100 A
to 150 A for 20 ms
Figure 5-13 Overcurrent Performance of TPS25984
eFuse-1![TPS25984EVM TPS25984 Overcurrent Performance of TPS25984
eFuse-2 GUID-316D1827-8503-4326-B43F-60113988DB4F-low.svg](/ods/images/SLVUCH6A/GUID-316D1827-8503-4326-B43F-60113988DB4F-low.svg)
VIN = 12 V,
CITIMER = 22 nF, COUT = 470 μF, RIMON =
1.1 ∥ 1.1 kΩ, RIREF = 40.2 kΩ, IOUT ramped from 100 A
to 150 A for 20 ms
Figure 5-14 Overcurrent Performance of TPS25984
eFuse-2