This is a very good option if you can stick to NiMH:We need to develop a circuit to charge two serial-connected rechargeable AA batteries (NiCd/NiMH) from 5V USB power source. Can someone please advise a low cost charging IC, and a overcharge protection cirucuit? Thank you,
DS2715 seems like a very good IC. Not sure how likely a charging IC's protecting mechanism might fail? Wondering if additional overcharge protection circuits are needed in the rare case of a charging IC failure? And if there are existing samples?This is a very good option if you can stick to NiMH:
https://datasheets.maximintegrated.com/en/ds/DS2715.pdf