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

2.1 DPDM Block Diagram and Working Flow Chart

Figure 2-1 shows that when DCP is detected, the device initiates adjustable high voltage adapter handshake including MaxCharge™, and so on. The handshake connects combinations of one or more voltage sources and or current sink on D+/D- to signal input source to raise output voltage from 5 V to 9 V/12 V. The adjustable high voltage adapter handshake can be disabled by clearing MAXC_EN and or HVDCP_EN bits.

GUID-20230323-SS0I-PQLP-XZS9-ZQNMMTJRMN3B-low.svg Figure 2-1 DPDM Detection Process

Also, we can get same conclusion from Figure 2-2, HVDCP/MaxCharge detection only happens after DCP/CDP detection, otherwise, it does not trigger HVDCP/MaxCharge detection, such as, if the result of BC1.2 detection is SDP, it cannot move forward to HVDCP/MaxCharge detection process.

GUID-20230323-SS0I-DRZB-2DJV-ZHWQPWW4VNQW-low.svg Figure 2-2 DPDM Working Flow Chart