The new products use AOS’s advanced co-packaging technology, combining a high-performance IC with protection features and use the company's latest high SOA Trench MOSFET. The new devices offer low RDS(ON) (20mohm) back-to-back MOSFETs to block any reverse current under fault conditions and are capable of up to 28V absolute maximum voltage.
Typically, a USB Type-C port adaptor supplies 5V at plug-in. Once plugged in, the client device negotiates a higher voltage for fast charging. The rise time for VBUS voltage from 5V to the final target value is very slow per the USB standard. Typical Type C protection switch designs that rely on a comparator to detect a voltage drop across the back-to-back power switches do not work with slow rising VBUS voltages and are susceptible to system-level faults. It’s for this reason that robust system designs implement an ideal diode approach. Typically, such solutions were implemented discretely and require many external components and lack protection features that are possible with an integrated circuit-based approach.
The new AOZ13987DI-02 and AOZ13984DI-02 devices feature Ideal Diode True Reverse Current Blocking (IDTRCB), allowing no reverse current at any conditions. They also feature 28V absolute maximum voltage with startup SOA management and other protections.
“The thinner profile, higher power, and greater flexibility offered by USB Type-C and USB PD 3.0 standards have allowed many notebook computers to only use Type-C ports for both power delivery and as a high-speed interface. Thus, eliminating the need for a dedicated power connector. As multiple Type C ports have become ubiquitous in consumer and computing designs, AOS’s new family of ideal diode-based protection switches offer a robust, reliable solution. And as always, AOS’s ability to combine TrenchFET technology with leading IC design enables a compact, efficient solution,” says Peter Cheng, Power IC Senior Marketing Director at AOS.
The AOZ13987DI-02 and AOZ13984DI-02 are immediately available in production quantities.
Alpha and Omega Semiconductor (AOS) is a designer, developer, and global supplier of a broad range of power semiconductors, including a wide portfolio of Power MOSFET, IGBT, IPM, TVS, HVIC, SiC/GaN, Power IC, and Digital Power products. AOS has developed extensive intellectual property and technical knowledge to address the increasingly complex power requirements of advanced electronics, differentiated by integrating its Discrete and IC semiconductor process technology, product design, and advanced packaging know-how.
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