USB PD Type-C controller adds programmable power

May 14, 2019 //By Julien Happich
Programmable USB-PD power delivery
Diodes has launched a USB Type-C power delivery (PD) controller with the latest programmable power specification for AC adapters, power hubs, battery banks, and USB PD converters.

The AP43770 has an embedded microcontroller running firmware compliant with the latest USB Type-C specification and USB PD Power Delivery Revision 3.0 V1.1. Support for Qualcomm Quick Charge (QC) 4/4+ is built into the device. The programmable controller means that other protocols such as QC3.0, QC2.0, and Battery Charging (BC) revision 1.2, as well as other legacy protocols with auto-detection can be used. This provides backwards compatibility with existing equipment.

The programmable power supply (PPS) feature, introduced with the latest version of the USB PD specification, is also supported by the AP43770. The PPS feature allows the output voltage to vary based on the load requirements; this is communicated using a relevant augmented power data object (APDO). This is implemented in the AP43770 through a constant current and constant voltage (CC/CV) output driver that is adjustable in 50mA steps up to 6A, and 20mV steps between 3V and 20V, respectively. The controller also includes the necessary support for eMarker technology, in order to detect and identify cables before power is delivered.

The AP43770 comes in the TSSOP-16 package.

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