Hi everyone.
I have a question on how smart fuel gauges communicate with charging ICs. I have a BQ20Z90 4S3P battery pack that is linked to a Linear LTC4100. Linear LTC4100 is a smart charging IC that allows battery pack to indicating charging current and voltage. Documentation on SLUU264 states that all broadcasts are enabled by BCAST bit. Does anyone know how I can confirm BQ20Z90 chip is communicating to LTC4100 the required charging parameters?
Thank you.
"
2.4 The bq20z90-V110 can report the appropriate charging current needed for the constant charging current
and the charging voltage needed for constant voltage charging per charging algorithm to a smart charger
using the ChargingCurrent and the ChargingVoltage functions. The actual charging status of
bq20z90-V110 is indicated with flags and can be read out with the ChargingStatus function.
2.4.1 All broadcasts to a host or a smart charger are enabled by the [BCAST] bit. If the [HPE] bit is enabled,
Master-Mode broadcasts to the Host address are PEC enabled. If the [CPE] bit is enabled, Master-Mode
broadcasts to the Smart-Charger address are PEC enabled. When broadcast is enabled, the following
broadcasts are sent:
· ChargingVoltage and ChargingCurrent broadcasts are sent to the Smart-Charger device address
(0x12) every 10 to 60 seconds.
"