Hey Battery Fuel Gauge Team,
A client of mine is utilizing the cell balancing feature of the BQ3060 set up with the external balancing circuit of P-channel MOSFETs, with 39 ohm 1W resistors. (~90mA of balancing per cell.)
When monitoring the Vgs of the FET, they are seeing pulses ON about 100ms, and off for about 150ms, with an amplitude of ~-2.3V. They are seeing current through the balance resistors corresponding to the ON period. (As expected) However, it is not ON long enough to balance the packs being used.
Is this pulsing normal?
If not, what's actually happening?
If it is normal, how can the ON time be increased?
Thank you,
-Rebel