AnsweredAssumed Answered

VND5T100 - Reverse polarity protection

Question asked by Miller.Siegmar on Dec 14, 2016
Latest reply on Jul 5, 2017 by Mauro Chiara


I have made the reverse battery protection according to the datasheet and the UM1557 (user manual) with a diode in the GND line in parallel to a 4.7kOhm resistor.

But if I do a reverse supply I detected a high current consumption.

This is due to the resistors at the CS outputs that are connected to ground. In my case these are 2.2kOhm resistors. They are only of the size 0603 and they will get destoryed in case of battery reversal.

But there is no advice in the datasheet or the user manual. What can I do to protect these resistors. Is it only possible by increasing the case size?