Diodes’ AP53781 and AP53782 are USB Type-C Power Delivery 3.1 dual-role power (DRP) controllers for battery-powered systems. They manage USB PD power negotiation for USB-C ports that can operate as either a power sink or power source, supporting Standard Power Range (SPR) profiles up to 21 V and Extended Power Range with Adjustable Voltage Supply (EPR/AVS) up to 28 V.

Both controllers include built-in firmware for automatic USB PD 3.1 negotiation, enabling sink operation when connected to a PD-compliant charger and source operation when powering a connected USB-C device. In dead-battery mode, the controllers force sink operation until external VBUS is detected. Typical applications for dual-role USB-C ports include power banks, power tools, e-bikes, and portable displays.

The AP53781 features resistor-configurable, preloaded PDO/RDO profiles that enable fixed source and sink operation without a host MCU. In contrast, the AP53782 adds an I²C interface that allows a host MCU to dynamically configure power profiles and implement more advanced power-management functions.

The AP53781 and AP53782 are priced at $0.57 and $0.59, respectively, in 1000-unit quantities.

AP53781 product page 

AP53782 product page 

Diodes

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