PD Power Secondary-Side Circuit Design:
Current AC-input PD supplies are almost all implemented as "flyback AC-DC power supply + PD protocol chip". The flyback AC-DC circuit design has been covered in a dedicated chapter; here we detail only the PD protocol chip attached to the secondary side.
The secondary side of a PD supply must fulfill three main functions: protocol communication, power allocation and output switching/protection; many vendors and models are available. Taking Shenzhen Hynet's HUSB series PD chips as an example, this chapter gives the protocol-control circuit design for the PD secondary side.
Single Type-C Port PD Protocol Chip Schemes
HSUB380B: USB Type-C PD controller supporting PD3.1 and multiple fast-charge protocols, up to 65W
Chip features
Supports PD 3.1, outputs 5V, 9V, 12V, 15V, 20V, max 65W
- Programmable APDOs with PPS support
Supports BC1.2 DCP, HVDCP, Apple 5V2.4A
Supports QC2.0/3.0/QC3.0+ Class A or B, AFC, FCP, SCP, PE 1.1+/2.0
Built-in N-MOSFET switch, very simple external circuit
Cable voltage compensation keeps the output voltage stable under high current
- Multiple safety protections
- OVP, UVP, UVLO, OCP, FOCP, TSD
- Two package options
- DFN3X3-10L and SOP-8L.
Application circuit:
HUSB363A: USB Type-C PD controller supporting PD3.1 and multiple fast-charge protocols, up to 100W
HUSB363A chip features:
–Supports PD 3.1 5V~20V, programmable APDOs, up to 100W output
–Supports QC2.0/3.0/QC3.0+, AFC, FCP, SCP, UFCS, PE 1.1+/2.0
–Supports I2C programming
–Supports BC1.2 DCP and Divider 3, Apple 5V2.4A
–Multiple safety protections: OVP, UVP, UVLO, OCP, FOCP, TSD
–Two package options: QFN4x4-24L and QFN4x4-16L.
Application circuit:
HUSB368: USB Type-C PD controller supporting PD3.2 and multiple fast-charge protocols, with 48V EPR
HUSB368 chip features:
–Supports PD 3.1 with added EPR AVS (15V to 48V) protocol, up to 240W output
–Supports APDO protocols PPS, SPR Mode (5V to 21V) and AVS (9V to 20V)
–Supports QC2.0/3.0/QC3.0+, AFC, FCP, SCP, UFCS, PE 1.1+/2.0
–Supports I2C programming
–Supports BC1.2 DCP and Divider 3
–Multiple safety protections: OVP, UVP, UVLO, OCP, FOCP, TSD
–Package option: QFN-24L
Application circuit:
Multi-Port PD Protocol Chip Schemes
Dual-port (1× Type-C + 1× Type-A) PD protocol chip: HUSB382D
HUSB382D chip features:
–Supports PD 3.1, programmable APDOs, USB Type-A + C dual output, up to 65W
–Supports QC2.0/3.0/QC3.0+, AFC, FCP, SCP, UFCS, PE 1.1+/2.0
–Supports BC1.2 DCP and Divider 3, Apple 5V2.4A
–Multiple safety protections: OVP, UVP, UVLO, OCP, FOCP, TSD
–Package: EESOP-10L
Application circuit:
Dual-port (2× Type-C) PD protocol chip: HUSB383A
HUSB383A chip features:
–Supports PD 3.1, programmable APDOs, dual USB Type-C output, up to 65W
–Supports QC2.0/3.0/QC3.0+, AFC, FCP, SCP, UFCS, PE 1.1+/2.0
–Supports BC1.2 DCP and Divider 3, Apple 5V2.4A
–Multiple safety protections: OVP, UVP, UVLO, OCP, FOCP, TSD
–Package: EESOP-10L
Application circuit:
Triple-port (2× Type-C + 1× Type-A) protocol chip: HUSB366
HUSB366 chip features:
–Supports PD 3.1, programmable APDOs, up to 65W
One chip integrating two Type-C and one Type-A outputs (all drop to 5V when multiple ports are inserted simultaneously)
–Supports QC2.0/3.0/QC3.0+, AFC, FCP, SCP, UFCS, PE 1.1+/2.0
–Supports BC1.2 DCP and Divider 3, Apple 5V2.4A
–Multiple safety protections: OVP, UVP, UVLO, OCP, FOCP, TSD
–Package: QFN 4mm x 4mm-32L
Application circuit: