Enable high-density USB-C charger designs at competitive cost with Infineon’s system solutions

The increasing prevalence of portable electronic devices with rechargeable batteries has created a need for convenient and reliable charging options. Unfortunately, the lack of standardization in charger and adapter equipment has resulted in the need for multiple chargers for different devices, which can be inconvenient for end-users. To address this issue, new challenges have arisen that require travel chargers to be designed to meet the demands of modern electronics. These devices need to be compact, lightweight, and efficient while still providing improved charging power, battery capacity, and charging time.

With that, USB power delivery (USB-PD) technology has emerged as the ideal solution. Together with the introduction of GaN devices, Infineon’s CoolGaN™ technology sets a new standard for operations at high switching frequencies allowing the volume of passive components to shrink, improving overall density. A compact-sized charging solution with higher power is now here to make charging faster and more efficient, simplifying the end-user experience.

However, implementing USB-PD technology brings about new complexities to be addressed. This whitepaper demonstrates the capabilities of Infineon’s available system solutions and acts as a guideline for design engineers to find their ideal solution for their design requirements.

In this whitepaper, you will learn how to:

  1. Choose the proper topology for fast charger designs
  2. Identify a suitable power switch for high-efficiency designs
  3. Improve wired communication capabilities with proper selection of a USB-C protocol controller

Download the whitepaper

Explore Infineon’s latest topologies to get started on your designs

To optimize charger and adapter performance, Infineon has built a portfolio of design solutions that integrate varied components designed to work together seamlessly. Allow faster design cycles and quicker time-to-market for new products with these recommended quasi-resonance (QR) flyback topologies:

High-efficiency 65 W USB-C dual-port charger reference design with ATQ transformer

65 W USB-PD/PPS power adapter solution using EZ-PD™ PAG1 and CoolGaN™

With the announcement of the USB PD 3.1 standard, higher power levels of up to 240 W are enabled. Still, the wide output voltage range from 5 V to 48 V raises new challenges for the converter topologies currently in use. An asymmetrical half-bridge flyback topology is introduced as the most suitable combination for USB-PD chargers and adapters with wide input and output voltage range:

Discover the industry’s first PFC + hybrid flyback combo IC for USB-PD EPR

Ultra-high density 65 W USB-PD PPS charger with hybrid flyback IC

The active clamp flyback (ACF) topology was also a recent introduction to improve the power density in chargers. It is suitable for higher frequency operation than the QR flyback due to its zero-voltage switching (ZVS) operation:

Explore our latest portfolio, paired with Infineon’s EZ-PD™ PAG2 Power Adapter Generation 2