Hello,
I'm designing an isolated DC/DC converter with a simple push-pull configuration and a central-tapped transformer. On the secondary side, there are two diodes and a 1uF capacitor to rectify the output. The operating frequency is 500kHz.
The nominal output current is around 100mA (abs max 150mA).
I'm planning to use BAT54 diodes, but I have a concern about their peak current capability, related to the inrush current of the circuit (charging the output capacitor at the startup). I'm assuming an ambient temperature < 60°C.
The NXP datasheet shows If=200mA at 25°C, and Ifsm=600mA at 25°C, square wave, tp<10ms; I guess this is related to the usage of the diode in a standard 50Hz / 60Hz rectifier. I would like to know if BAT54 can handle an higher forward current for a shorter time. In my circuit, the peak current duration is < 10µs and the maximum value is 1.8A.
Is there some documentation about "pulse power rating" of BAT54? I would like to understand if it can be used in my application.
Many thanks,
Alessio
