SLUAB21 May   2025 BQ25750 , BQ25751 , BQ25756 , BQ25756E , BQ25820

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Perturb And Observe
  6. 3Implementing P&O with BQ2575x
  7. 4Testing the External P&O MPPT Algorithm
  8. 5Summary
  9. 6References

5 Summary

This application note demonstrated the external implementation of the Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) algorithm for the BQ2575x family of battery chargers. By adjusting the VAC_DPM register externally using an MCU host controller, real-time optimization of solar panel output was achieved, improving overall system charging efficiency. The proposed method was validated using the BQ2575x Evaluation Module (EVM) and the LP-MSPM0L1306 LaunchPad, showing effective convergence toward the maximum power point under dynamic operating conditions. Testing confirmed that the external P&O control method successfully maintained system operation near the maximum power point, and adapted to changing solar input conditions