shsn
Junior Member level 3
Hello,
I recently replaced a radiator fan on my car and the rating on the fan says 12V (10-15V max) and 6.5A continuous (15A peak). There is an ECU that can output PWM with varying duty cycle (5-20kHz) with up to 5A max. But I would like to implement an optocoupler to protect the output pin of the ECU. I have chosen IRF2804S-7P as it seem to have enough current handling capabilities with low Rds. But the Vgs(th) on datasheet says 2V min and 4V max. Does it mean I need a some sort of voltage regulator to drop battery's 12V to around 3V to fully turn on the FET?
Also is there an appropriate optocoupler that I could use?
Thank you.
Erik.
I recently replaced a radiator fan on my car and the rating on the fan says 12V (10-15V max) and 6.5A continuous (15A peak). There is an ECU that can output PWM with varying duty cycle (5-20kHz) with up to 5A max. But I would like to implement an optocoupler to protect the output pin of the ECU. I have chosen IRF2804S-7P as it seem to have enough current handling capabilities with low Rds. But the Vgs(th) on datasheet says 2V min and 4V max. Does it mean I need a some sort of voltage regulator to drop battery's 12V to around 3V to fully turn on the FET?
Also is there an appropriate optocoupler that I could use?
Thank you.
Erik.
