USB charger IC overheating.
My Lenovo Tab 2 started having charging and discharging issues. Charging was slow, and the device got unusually warm. I opened it up and found that components under a shield next to the charging port were getting very warm. Both when charging and when the tablet was just unused with the battery connected.
I removed the main board and desoldered the shield to find a BQ24296M https://www.ti.com/product/BQ24296M “1-cell, 3-A, I2C controlled buck charger with USB OTG and min system regulation”
I connected the battery and immediately this charger chip was too hot to touch.
So now I know what is heating up.
I checked all the capacitors around the IC but found no immediate short. When the battery is not connected and I connect the charger, the chip does get slightly warm but nothing spectacular.
Are these signs that the chip is shorted internally or can there be external components causing this?
Should I try changing the charging chip?
Here is a picture from the chip data sheet, please tell me if there is something else I should check:
Cette question est-elle utile ?