Other Parts Discussed in Thread: BQ25601D,
I have a board, see attached screenshot of the power section, that originally had a BQ25601D but had to replace it with a BQ25611D due to the default over-voltage lockout setting of the BQ25601D. The physical replacement appears to have been successful but the part does not appear to operate.
I can read registers from the device via the I2C bus but the REGN output is around 10 V (datasheet lists 7 V as absolute max), it does not regulate the SYS or BAT output voltages and does not appear to be attempting to switch. Please note, I saw similar behavior on the BQ25601D after I was able to modify register setting to raise the over-voltage lockout setting to support a 12 V input.
Is it possible this circuit could damage the BQ25611D to the point of being nonoperational?
I have been able to power my board off of the BQ25611DEVM evaluation board by jumpering the output of U5 from my board to the VIN of the eval board and then jumpering back the SYS voltage from the eval board back to my board with the the following changes to my board: 1) Remove L3, 2) remove R9, R10, R173 and R174 and short D+/D- together and 3) enable U2 from the PG signal of U3. However, the BQ25611D on my board continues to be nonoperational.
