MP2760 not charging dead battery

Battery Management
#1

We have an MP2760 setup to charge 4x Li-Ion batteries. The 4 Li-Ion Batteries also have a battery protection circuit which will break the connection between the battery pack and the MP2760 when the protection circuit detects a low battery voltage. We have a bypass diode from the charging source to the controlling IC to enable the charging via i2c when the charging cable is plugged in.

The SYS voltage sits at about 12V, but the BGATE never turns on the BATFET.

Does the MP2760 need a battery voltage present to allow charging? If not how can we enable the BGATE driver to start the charging?

The MP2760 registers are setup as follows:
W[0x08]·0x05·0x89·0x00·
W[0x08]·0x06·0x39·0x00·
W[0x08]·0x07·0x3C·0x00·
W[0x08]·0x08·0x3B·0x00·
W[0x08]·0x09·0xF9·0x00·
W[0x08]·0x0A·0x31·0x00·
W[0x08]·0x0B·0x31·0x10·
W[0x08]·0x0C·0x10·0x04·
W[0x08]·0x0D·0x59·0xFF·
W[0x08]·0x0E·0xB0·0x00·
W[0x08]·0x0F·0x33·0xF1·
W[0x08]·0x10·0x45·0x0E·
W[0x08]·0x11·0xE8·0x64·
W[0x08]·0x12·0x73·0x18·
W[0x08]·0x13·0x80·0x08·
W[0x08]·0x14·0x00·0x6A·
W[0x08]·0x15·0x74·0x36

#2

Hello! Thanks for reaching out with your request.

Based on your issue above, kindly check to see if there is an INT signal. If so, that means some interrupt was initiated so would need to check instances that INT signal can be triggered.

At the same time, kindly check VBATT_TC and VBATT_PRE thresholds and compare with what they’re set in register settings to identify if this would initiate CC trickle charge or CC pre-charge, respectively. Change as needed to allow charging of the deeply depleted battery.