I am a beginner in electronics and would like to request comments and critics for the following circuit I have designed: The objective is to drive a two coils 12V bistable relay upon the state of a relay input provided by a BMS hooked on LiFePO4 battery:
- input relay closed: short pulse applied to the ON side of the bistable relay
- input relay open: short pulse applied to the OFF side of the bistable relay
Operating voltage range from 11.5 to 14.8V. As the battery is charged by an alternator, electro magnetic environment can be quite perturbed (similar to what is observed in a car).
CD4093 has been selected as it is able to operate up to 20V. Anti bounce has been added to the input command. FET protection is provided by a zener and a TVS.
Thanks in advance,