With the increasing demand for compact and high-performance charging products, dual-port fast chargers have become widely used in wall chargers, vehicle chargers, and other power supply applications.
To simplify dual-port charger designs, semiconductor companies are developing highly integrated charging controllers that combine protocol recognition, power management, and protection functions into a single chip.
Recently, Hynetek introduced the HUSB382D dual-port fast charging controller, designed for USB-C and USB-A combination charging applications. The chip supports USB Type-C 2.1, USB PD3.1, QC, AFC, FCP, SCP, and other mainstream fast charging protocols.
By integrating two VBUS power switches, current sensing resistors, and constant voltage/current control functions, HUSB382D can reduce external components, save PCB space, and lower overall material costs.
The controller is suitable for applications including dual-port chargers, vehicle chargers, and other compact charging devices.
HUSB382D Supports USB-C and USB-A Dual-Port Fast Charging
HUSB382D is a highly integrated USB-C and USB-A dual-port fast charging controller.
The chip can manage USB-C port CC, D+, and D- signals, as well as USB-A port D+ and D- signals. It also provides independent control of the VBUS output for both charging ports.
For the USB-C interface, HUSB382D complies with USB Type-C 2.1 and USB PD3.1 specifications.
It supports fixed output voltage levels including:
The controller supports up to five fixed PDOs (FPDO) and two adjustable PDOs (APDO), allowing programmable output voltage and current to meet the charging requirements of smartphones, tablets, laptops, and other electronic devices.
For USB-A ports, HUSB382D supports multiple fast charging protocols, including:
→ BC1.2 DCP
→ Apple 5V 2.4A
→ QC2.0
→ QC3.0
→ QC3.0+ Class A/Class B
→ Samsung AFC
→ Huawei FCP/SCP
→ MediaTek PE1.1+/PE2.0
This wide protocol compatibility allows the controller to support a broad range of existing fast charging devices.
Automatic Switching Between Single-Port and Dual-Port Charging
One of the key features of HUSB382D is its intelligent port management capability.
When only one charging port is connected, the controller can enable USB PD or HVDCP fast charging according to the connected device.
When both USB-A and USB-C ports are used simultaneously, the chip automatically switches to dual-port 5V shared output mode.
This design eliminates the need for additional complex port control circuits and enables flexible switching between single-port fast charging and dual-port charging.
Integrated Power Management and Protection Functions
HUSB382D integrates multiple functions that simplify charger circuit design.
The chip includes:
→ Two VBUS power switches based on N-channel MOSFETs
→ Current sensing resistors
→ Constant voltage and constant current control
→ Internal loop compensation
The integrated design helps reduce the number of external components required on the secondary side of isolated AC-DC fast charging power supplies.
To address voltage drop caused by cable resistance during high-current charging, HUSB382D provides multiple cable compensation options to improve output voltage stability at the device end.
The chip also supports optical feedback circuits for output regulation, making it suitable for isolated AC-DC fast charger designs.
Multiple Protection Features Improve Charging Reliability
Safety and reliability are important requirements for fast charging products.
HUSB382D integrates several protection functions, including:
→ Output over-voltage protection (OVP)
→ Output under-voltage protection (UVP)
→ Input under-voltage lockout (UVLO)
→ Over-current protection (OCP)
→ Fast over-current protection
→ Over-temperature shutdown
The USB interface signal pins provide ±5kV HBM ESD protection, improving reliability during frequent plugging and unplugging.
The controller is available in two package options:
→ ESSOP-10L
→ DFN3×3-12L
These package options allow manufacturers to select different solutions based on PCB layout and power density requirements.
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