Part Number: BQ76200
Other Parts Discussed in Thread: BQ76930, TIDA-010030
Hi:
I'm using the AFE bq76930 with the high side fet driver bq76200 to implement a BMS for 5A charge and discharge current.
I'm using a configuration with 1x FET for charge and 1x FET for discharge, in series. My battery is a 10s pack.
I have read both components datasheets, everything is very clear.
Then I studied the great TIDA-010030 ref design, and I have some questions on that implementation:
- Instead of using bq76200's build in pre-charge FET driver output, it implements a discrete driver outside, directly commanded by the MCU. Why is that? Is there any known issue with the
PCHG driver of the bq76200 ?
- In the discharge fet driver, there is an extra circuit based on a 2n7002 than will turn on only if PACK- is bigger than PACK+, and it's usually off.
What is it for? Is it recommended for my 5A 10s battery application?
- In the charge fet driver, there is an extra circuit based on a PMOS BSS84. What is it for? Is it recommended for my 5A 10s battery application?
Thanks very much
Sebastian
