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AOZ1380 - Type-C Power Delivery Protection Switch that combines Current Source and Sink Function in a Small Thermally Enhanced Package

AOZ1380 Protection Switch
AOZ1380 Protection Switch

Alpha and Omega Semiconductors Limited had introduced a new Type-C Power Delivery Compliant protection switch, AOZ1980 that combines both current sources and sink function into a single small thermally enhanced 3mm x 5.2mm DFN package and it is capable up to 28V absolute maximum voltage. The AOZ1380 combines a high-performance IC with protection features and AOS state of the art high SOA MOSFET.


The internal back to back discrete MOSFET that provides the sinking path has a low source to source resistance of 20mOhm and has a higher SOA on soft start condition as it is manufactured on AOS’ high SOA hot-swap platform of trench MOSFETs. The AOZ1380 provides true reverse current blocking for applications that required protection from exposure to high voltages. The devices have an ultra-low resistance, enabling high continuous current of 7A and peak current of up to 20A, hence the new device can be an ideal load switch for notebook applications where high peak current capability from the adaptor is needed for CPU or GPU turbo mode events.


In the Sinking application, two discrete back to back MOSFETs along with resistors and capacitors provide soft start functionality to prevent type-C power adaptor brownout at the plugin. The programmability and protection features such as reverse current blocking and over-voltage and over-temperature protection are unavailable in this implementation. As a Type C port must also provide power delivery of up to 15W in a notebook application, there's also a need for a 5V current limited load switch with protection features. The AOZ1380 provides all these functionalities in a 50% smaller board space compared to competing solutions and supports the sinking switch requirements with the fastest response time in the industry to support fast role swap events.


Features of AOZ1380 Protection Switch

  • Operating Range: 3.4V to 22V for sink path and 3.4V to 5.5V for sourcing path
  • 28V Absolute Maximum rating at VBUS
  • On-Resistance: 20mΩ for sink and 39mΩ for source
  • 20A peak sink current for 10ms @ 2% duty cycle
  • 10A Sink Continuous Current
  • Common protection features: True Reverse Current Blocking, Under-Voltage Lock-Out, Over-Voltage Protection, Thermal Shutdown Protection
  • Additional features for sink: Programmable Soft-Start
  • Additional features for source: Programmable Over-Current Protection, Fast Role Swap support


Note: More Technical information can be found in the  AOZ1380 datasheet linked at the bottom of this page.


The AOZ1380 provides an ideal solution for the latest notebooks, ultrabooks, Chromebooks, and docking stations with Thunderbolt/USB Type-C PD ports. The AOZ1380 is immediately available in production quantities with a lead-time of 12 weeks. The unit price of 1,000 pieces is $2.25.

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