Abstract: Adapting to multi power PD fast charging adapters, relying on 30-40V PDFN power MOS to achieve efficient rectification and stable switching, and continuously planning and implementing matching DC-DC power products.

Application Overview
USB-PD fast charging has become the mainstream charging solution for mobile phones, tablets, laptops, and portable digital devices due to its wide compatibility, adjustable power, and fast charging speed. At present, fast charging adapters continue to iterate towards miniaturization, high density, high efficiency, and low heat generation. Secondary synchronous rectification, VBUS switching, port protection and other circuits have strict requirements for the switching performance, withstand voltage margin, conduction loss and heat dissipation ability of power devices, which are the core key factors determining the overall efficiency, temperature rise and stability of fast charging machines.
Huaxin Er precisely matches the needs of the PD fast charging industry, focusing on 30V-40V PDFN packaged power MOSFETs, widely used in secondary synchronous rectification, output switching, and power path control circuits of 20W-100W PD fast charging adapters. The product has ultra-low conduction resistance, significantly reducing conduction loss and overall temperature rise under high current fast charging conditions; Excellent high-frequency switching characteristics and avalanche resistance can effectively suppress high-voltage spikes and adapt to high-frequency fast charging topologies; Compact PDFN packaging saves PCB layout space, adapts to the trend of miniaturization and flat design of fast charging heads, and stably supports multi gear PD voltage regulation fast charging scenarios.
At present, the DC-DC power supply series products suitable for PD fast charging machines are being planned, and in the future, a matching solution of power MOS+power management chip will be formed to provide a more complete and cost-effective domestic power supply solution for PD fast charging terminals.