I design a PCB that has a 9-36V input, this goes into a buck converter to 5V, then this converter feeds the BQ24295, but seems like the batfet doesn´t turn on. I have done many meassures, the 5V output of the buck is really stable (it meassures 5.07V), when i meassure the Vsys it goes about 3.8V with no battery, and 3.5V with battery plugged in, when i meassure the battery voltage when plugged in it has the same value when it isn´t plugged, like the batfet is NOT on. I also checked the registers but the only thing weird is that is says is DPM, which is very strange, because the input voltage is above the 4.7v minimum and the current is very low (with the power supply it says about 30mA of the whole board at 12V, so at most 100mA at the 5V input of the charger, so also very far from the input current limit set to 2A). I also realize that the fault register is triggered on the 7th bit, but this seems to be ok, since i´m just reading the registers and not actually writting into them, so it would be in a "standalone" mode, as the datasheet says.
I´m even considering to look for an alternative IC.
There is something i have wrong on the schematic?, is there any advice on how to solve this?
i leave the schematic and registers:
Reg: 0: INT: 94 | BIN:01011110
Reg: 1: INT: 59 | BIN:00111011
Reg: 2: INT: 32 | BIN:00100000
Reg: 3: INT: 17 | BIN:00010001
Reg: 4: INT: 178 | BIN:10110010
Reg: 5: INT: 156 | BIN:10011100
Reg: 6: INT: 147 | BIN:10010011
Reg: 7: INT: 75 | BIN:01001011
Reg: 8: INT: 173 | BIN:10101101
Reg: 9: INT: 128 | BIN:10000000