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BQ294502: bq294502 VOV abnormal

Part Number: BQ294502

Dear Sir,

Here I am using a battery protection ic of bq294502 for 3s2p

the battery pack vout 9V~12.6V.  each cell around 4.2V.

So far I found the OUT keeps high 2.49v and after checking the Vc1/Vc2/Vc3 , the voltage is 3.5938V/3.6v/3.365v respectively. it doesn't over  the Vov 4.35V ( .bq294502  )