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ULN2803A: Internal diode is on

Guru 16770 points

Part Number: ULN2803A

Hi

ULN2803A has a diode connected between the output and COM pin are used to suppress surge voltage.

If this diode is ON every 50msec, could it be problem?

I attached the situation to be assumed as follows.

Normally, the voltage at COM is 24V.


① OUTPUT terminal would come 0V to 42V with inrush voltage
② Then, internal diode would be on
③ Finally, COM terminal would come 24V to 42V instantaneously.

The voltage applied to COM is 42V that is less then absolute maximum rating of Vce.

However, I want to confirm if it is problem that the internal diode could be ON periodically (50msec period).

Could you please give us your view?

BestRegards