Hello guys,
Our customer wants to use TPS25921 to protect a actuator driver when the actuator terminals are shorted.
But they have the following questions about TSD of the device .
Could you tell me your comments for the questions?
1. When RILIM is 95.3kohm, TPS25921 current limit value is set to 1A.
Then if the output load is shorted to GND, the device heats and the device temperature
reachs to TSD threshold level (155C typ). After that, the switch which connects between IN and OUT terminal
is turned off by TSD function.
The customer wants to know the TSD accuracy. What is the maximum/minimum temperature of the TSD threshold level?
2. What is TPS25921 life time by design with no TSD working? Our customer life time target is 13 years.
Can the device meet the life time target?
3. After TSD works 1 time, is the device reliability changed? Can our customer continue to use the device?
Or should they replace the device with new one to meet their life time target?
Also is the device life time reduced after TSD working?
Your reply would be very appreciated.
Best regards,
Kazuya Nakai.