BAT54 - Inrush current capability

AlessioCaligiuri — Wed, 17 Nov 2021 13:27:03 GMT

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

Re: BAT54 - Inrush current capability

guoweisun — Fri, 19 Nov 2021 00:22:59 GMT

BAT54 had Transferred to Nexperia on 06-Feb-2017,please contact with them for your issue.

Re: BAT54 - Inrush current capability

AlessioCaligiuri — Fri, 19 Nov 2021 10:14:12 GMT

Thanks,

Alessio

topic Re: BAT54 - Inrush current capability in Power Management

BAT54 - Inrush current capability

Re: BAT54 - Inrush current capability

Re: BAT54 - Inrush current capability