SLUAB26 March   2025 BQ25672 , BQ25798

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Discrete VINDPM Auto-reset Circuit
  6. 3Summary
  7. 4References

3 Summary

This application note demonstrates a discrete circuit that resets the default VINDPM threshold of the charger after VSYS collapse. The circuit works for either VAC1 or VAC2 sensed inputs and with or without ACDRVx driven MUX FETs. By being below either 0.7V or 1.4V of the VOC of a solar panel, the default VINDPM threshold of the charger is likely not exactly the MPP of the panel, but is generally close enough for the charger to provide VSYS=MINSYS to allow the processor to power up or recharge the battery.