BQ76952: BQ76952PFBR design issue

Chen Alex1

Part Number: BQ76952

hi sir

I want to design a battery cell monitor, use BQ76952PFBR

1.Please help to check the circuit is right?, I only monitor the eight battery & 4 temp ,without over current/over voltage protect

2.REGIN(pin 36)apply +15v, the command the REG1 LDO 3.3V output, the circuit is right?

3.if I use the not used pin to monitor others voltage(not cell voltage), ok?

thanks

0 Matt Sunna over 3 years ago

Hi Alex,

There are some problems with this circuit. REGIN should only have 5.5V (the abs max rating in the datasheet is 6V), and the capacitor on the REGIN pin should be 22nF. I suggest using the NPN circuit shown in the datasheet example schematic. There is also a new video to help with the schematic creation: https://training.ti.com/creating-schematic-bq769x2-battery-monitors?context=1134734-1139259-1147303-1149530

Best regards,

Matt

Power management forum