The reference design for creating multi-port USB chargers that deliver fast, reliable power for all your devices. Learn how it works and what it can do.
As devices like smartphones, tablets, and laptops need faster charging, Power Delivery (PD) technology was created to provide the quickest charging through USB Type-C (USB-C) cables. USB PD can deliver up to 100 W of power through a USB-C cable, allowing universal AC-DC adapters to have multiple USB-C ports to charge different devices like smartphones, gaming laptops, power tools, and e-bikes. However, meeting the demand for more power and various ports can be challenging for current designs. Factors like electromagnetic compatibility, power efficiency, and standby power must be managed carefully. To make this easier, Infineon offers the REF_65W_2C_GAN_PAG1 reference design.
Design engineers can use this reference design to develop chargers that support multiple devices simultaneously, ensuring compliance with energy efficiency standards like DOE Level VI. Additionally, the design’s compact form factor and high power density allow small, portable chargers to be created without sacrificing performance. By leveraging this reference design, engineers can prototype, test, and accelerate the development of reliable, high-performance charging solutions, ultimately saving time and reducing design complexity.
The design is optimized for USB-PD multi-port charger applications, offering a wide input range with output voltages from 3.3 V to 21 V. Each USB-C port can deliver 65 W of power, and the total output from both USB-C ports can be dynamically shared up to 65 W, depending on the connected devices.
The design offers a high-efficiency QR flyback charger adapter with peak efficiency exceeding 93%, providing excellent performance. It allows for simple and flexible customization, making it adaptable to various needs. Additionally, its high level of integration enables a compact form factor, supporting charger designs with high power density.
This reference design has two USB-C ports, each capable of delivering 65 W of power, with a total output of 65 W that can be shared between the ports depending on the connected devices. It works with a wide input voltage range of 90-264 VAC at 50-60 Hz. A smart load-sharing feature ensures efficient charging across both ports. The design includes a high-efficiency ATQ transformer and uses two controllers.
This design uses Infineon’s EZ-PD PAG1P/PAG1S controllers as the primary and secondary controllers, an EZ-PD CCG7DC controller for managing PD and DCDC, CoolGaN 600 V GIT HEMTs as the main switch, OptiMOS N-channel MOSFET for the SR switch, OptiMOS 6 for the DCDC switch, and a BSZ0902NS OptiMOS for the VBUS switch. The board measures 56 mm x 27 mm x 33 mm and has a power density of 21.34 W/in³. It also features the ATQ transformer, which provides high efficiency with a peak performance of over 92% at full load.
Infineon has tested this reference design. It comes with a bill of materials (BOM), schematics, assembly drawing, printed circuit board (PCB) layout, and more. The company’s website has additional data about the reference design. To read more about this reference design, click here.
