Other Parts Discussed in Thread: TPS61252, , BQ24380
BQ24072T is used as a charger in my project。A boost chip TPS61252 is added before BQ24072T ,because input voltage less than 4V。The following Figure shows my circuit. BQ24072T works in USB500 mode(EN1= 1,EN2=0),the charge current is 300mA(RISET = 3K).
Usually BQ24072T works normally,but sometimes it is hot,when the battery discharge。At this time, discharge current is 627mA,IN (PIN13) is 0.4V,TS is 0.5V,ISET is 0.6V,PG is 0V;Under normal condition,they should be 0 except PG is high 。
What is the reason for my problem?