BQ24075: BQ24075 not charging

Prodigy 60 points

Replies: 6

Views: 29

Part Number: BQ24075

Dear community

I have designed a Li-Ion charger with the BQ24075 based on the schematic below.

Problem: When I connect a voltage at IN (5V, current limit >2A), the LED at the CHG pin is illuminated, but the battery is not charged (I measured the battery current)

Further information:

- Without anything applied at the IN pin, the battery voltage appears at the OUT pin, so this seems to work as expected

- I connected a 10k NTC at the TS pin

- The only difference I can see compared to the reference schematic is that EN2 and the charge LED are connected to IN instead of OUT. As those are digital terminals, I don't expect problems from this

Any idea what could be the problem?

Best regards,

Lukas

6 Replies