We use the ADuM240E0 to isolate the signals driving a H-Bridge
we have several hundreds devices out in the market.
Recently we have received defect ones where the Vdd1 or Vdd2 has a short circuit.
We have no explanation for this.
Any suggestion from your side where we can search?
Thanks, best regards Greg
Vdd1 is 3.3 V
Vdd2 is 5.0 V
both voltages are protected by TVS diodes
Via..d are driven from a PIC micro-controller (10 ohms in the line)
Voa, b are driving directly a SN74HC86 Logic
Voc,d are the enable signals for the H-Bridge driver chip
None of the surrounding components are damaged.
Only short of Vdd1, mostly