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BQ24210: BQ24210 Vovp

Righardt Guse
Prodigy 50 points
Part Number: BQ24210

Hi All,

As per reference design for BQ24210, VBUS is connected to a 6V solar panel.
Vovp is rated between 7.3V - 7.7V.

Most 6V solar panels when in direct sunlight will exceed Vovp by far, causing the IC to be in over-voltage lockout, resulting in no charge to the battery.
Is that correct...?

If so, I don't understand the low Vovp of the IC, or should external voltage regulation (zener maybe?) always be place in front of the BQ24210 part...?

How will this effect the VBUS-DPM feature...?

I'm struggling to find a part suitable for low voltage solar panels (6V) that feature MPPT.

Any help would be appreciated.

  • 0
    TI__Guru* 75866 points
    Yes input voltage to start operation must be less than Vovp. After starting the charger load will reduce the cell voltage and VBUS-DPM will manage the load to keep from crashing the cell voltage.
    If the cell voltage at start up is constantly above the Vovp a voltage limiting or regulating device could be added. This could be the zener you mentioned or possibly and LDO. With many cells even a small resistor load will reduce cell below a peak. Best solution would depend on your requirements and use case.