Contribution of alpha and omega in this field
Alpha and Omega Semiconductor Limited, a designer, developer, and global supplier of a broad range of power semiconductors and power ICs announced a replacement Type-C Power Delivery-compliant two-in-one combo protection switch capable of up to 28-V absolute maximum voltage. The AOZ1380DI may be a smart protection switch combining both current source and sink function into one, small, thermally enhanced 3.0 × 5.2-mm DFN package. Made possible by AOS’s advanced co-packaging technology, AOZ1380DI combines a high-performance IC with protection features and AOS’s state-of-the-art high-safe-operating-area (SOA) MOSFET. This new device provides true reverse-current blocking intended for applications during which protection from exposure to high voltages is required. The AOZ1380DI provides a perfect solution for the newest notebooks, ultrabooks, Chromebooks, and docking stations, with Thunderbolt/USB Type-C PD ports.
In the sinking application, two discrete back-to-back MOSFETs alongside resistors and capacitors provide soft-start functionality to stop Type-C power adaptor brownout at the plugin. However, programmability and protection features like reverse-current blocking and overvoltage and overtemperature protection are lacking during this implementation. As a Type-C port must also provide power delivery of up to fifteen W during a notebook application, there’s also a requirement for a 5-V current limited load switch with protection features. The AOZ1380DI provides all this functionality and reduces board footprint by over 50% compared to competing solutions.
The internal back-to-back discrete MOSFET that gives the sinking path features a low source-to-source resistance of 20 mΩ. Manufactured on AOS’s high-SOA hot-swap platform of trench MOSFETs, it’s high SOA in soft-start conditions. The ultra-low resistance enables a high continuous current of seven A and peak currents of up to twenty A, making it a perfect load switch for notebook applications during which high peak current capability from the adaptor is required for CPU or GPU turbo-mode events. The AOZ1380DI also supports the sinking switch requirements with the fastest reaction time within the industry to support fast role-swap events.
“The thinner profile, higher power, and greater flexibility offered by USB Type-C and USB PD 3.0 standards have prompted many computer manufacturers to drop the barrel jack in favor of USB Type-C ports for charging their notebook and ultrabook offerings,” said Peter Chang, Power IC Senior Marketing Director at AOS. “The unique combination of AOS’s high-SOA MOSFET technology and controller ICs enables system designers to realize a compact footprint while enhancing the reliability of the Type-C port.”
- Operating range: 3.4 V to 22 V for sink path and three .4 V to 5.5 V for sourcing path
- 28-V absolute maximum rating at VBUS
- On-resistance: 20 mΩ for sink and 39 mΩ for source
- 20-A peak sink current for 10 ms @ 2% duty cycle
- Common protection features: true reverse-current blocking, Undervoltage lockout, overvoltage protection, thermal shutdown protection
- Additional features for sink: programmable soft-start
- Additional features for source: programmable overcurrent protection, fast role-swap support
Pricing and availability
The AOZ1380DI is instantly available in production quantities with a time interval of 12 weeks. The unit price of 1,000 pieces is $2.25.