Hi, Mr/Mrs/Ms,
We met an issue when using bq35100, the circuit is shown below.
VBAT is 4.5V, VCC is 1.8V, and GE connects to a GPIO of a SOC which provides 1.7V high voltage.
First, we noticed we did something wrong because GE high requires > 2.65V, so the SoC can't talk to bq35100 through I2C.
To fix this, we connected GE to VBAT, then we found an interesting issue.
The I2C communications work, but the current consumption is super high to 250mA, then we saw VCC which connects to REGIN go up to 3.5V, which is much higher than it should be which is 1.8V.
Seems the input of GE can raise the REGIN voltage. That sounds pretty strange! Could you please help to explain what is happening here?
Then I started to check the circuit, it seems REGIN is not in a good way either according to the doc which says "The REGIN pin accepts any voltage level between 2.7 V and 4.5 V".
Will this cause the strange issue we talked about?
Shall we keep the GE and REGIN with the same or close voltage like what the schematic from bq35100 EVM doc shows below (REGIN = 3.3)?
Thank you! Have a nice day!
BR,
Peng
