SLVAFT9 June   2024 TPS61022 , TPS61023

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction of Photovoltaic Cell and MPPT Requirement
  5. 2Typical Battery Powered Outdoor System with PV Panel
  6. 3MPPT Method with Generic DC/DC Converter
    1. 3.1 TPS61023 Introduction
    2. 3.2 Hysteresis Control MPPT Method with TPS61023
    3. 3.3 Experiment Results
  7. 4Summary
  8. 5References

3.1 TPS61023 Introduction

TPS61023 is a synchronous boost converter with 3.7A valley switching current limit. In outdoor PV panel equipment, TPS61023 is used to boosts the PV panel voltage to a stable 4.2V. If the battery voltage is lower than 4.2V, boost starts to charge the battery. This process makes the system be able to continuously charge the battery when PV panel voltage changes.

However, as shown in TPS61023 data sheet, under-voltage lockout (UVLO) threshold of VIN is typically 1.7V rising and 0.4V falling. This means the converter startup when VIN rises above 1.7V and shutdown when VIN falls below 0.4V, it is different from the maximum power point of PV panel, so the engineer needs to use another way to control the DC/DC converter.