Other Parts Discussed in Thread: BQ79616
Dear support,
We are unable to maintain sleep current requirement of customer using BQ79616. Our Conditions during sleep mode are:
- Need to monitor temperature of the cell. 3 temperature sensor (10K NTC) are connected in the system. 10K pull ups resistance are being used in TSREF.
- No Cell Balancing .
- No communication.
- One RTC device (PCA21125) is connector on CVDD supply (5V). We have used one linear regulator to convert 5V into 3.3V. RTC active current is ~250uA at 3.3V supply.
- Requirement of the BMS wakeup is there during fault condition so it is done through NFault pin.
As per data sheet the worst mode sleep mode current of the BQ79616 is 220uA. But considering some current of active modules it should not go higher than 400uA.
But we got 1.5mA current during sleep mode.
Can you please suggest how to get Sleep Mode current <500uA. Buck converter in the BMS board is completely off so,no current consumption in the MCU device.
Prompt response is highly appreciated.
thanks and regards
Subhash Dhyani