SLVAFL3 april   2023 BQ25890H

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2DPDM Structure of BQ25890H
    1. 2.1 DPDM Block Diagram and Working Flow Chart
    2. 2.2 Key Register Configuration for BC1.2/HVDCP Standard Power Source with DPDT Signal Switch
    3. 2.3 Key Register Configuration for BC1.2/HVDCP Standard Power Source Without DPDT Signal Switch
    4. 2.4 Fast Charging Configuration for PPS/HVDCP Power Source with BQ25890H
      1. 2.4.1 Working Mechanism with PPS/HVDCP Source
      2. 2.4.2 Programmable D+/D– Output Driver Introduction in BQ25890H
  5. 3References

Abstract

In smart-phone applications, the unit for charging plays a very important role because the charging unit needs to detect a correct charging port such as DCP/SDP/HVDCP to finish a safe and correct charging process. The charging unit includes different charging protocols to identify different charging source, such as BC1.2 and other special fast charging protocol so as to execute correct charging profile in charging control unit. This application note provides a key register configuration to assist software design engineers to drive BQ25890H and BQ25891H efficiently. Besides standard BC1.2, this document also includes a detailed description to drive PPS (Program Power Supply)/HVDCP source so as to realize fast charging with higher efficiency.