Summary of USB PD CONTROLLER FROM DIODES SUPPORTS STANDARD AND PROPRIETARY PROTOCOLS FOR POWER DELIVERY
Diodes Incorporated launched the AP43770, a USB Type-C Power Delivery controller for fixed and portable devices. It supports USB PD 3.0 V1.1, Qualcomm Quick Charge 4/4+, and legacy protocols with auto-detection. The chip includes programmable power supply features via CC/CV drivers and eMarker support for active cables. When paired with an AP3108L PWM controller, it forms a complete solution offering OTP or MTP memory for customization.
Parts used in the AP43770 Project:
- AP43770 USB Type-C power delivery controller
- AP3108L PWM controller
- Embedded microcontroller
- Firmware compliant with USB PD Revision 3.0 V1.1
- Constant current and constant voltage output driver
- OTP memory (8kb)
- MTP memory (user configurable parameters)
Diodes Incorporated announced the introduction of the AP43770 USB Type-C™ power delivery (PD) controller, a highly integrated solution for implementing PD over USB in fixed and portable devices, and offline power adapters. The AP43770 is well-suited to a range of applications where USB PD is implemented, including AC adapters, power hubs, battery banks, and USB PD converters. It features an embedded microcontroller running firmware compliant with the latest USB Type-C specification and USB PD Revision 3.0 V1.1. Support for Qualcomm® Quick Charge™ (QC) 4/4+ is built into the device. Additionally, the inclusion of QC3.0, QC2.0, and Battery Charging (BC) revision 1.2 and other legacy protocols with auto-detection means that backwards compatibility can be maintained 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). Support for PPS with APDO 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.
As USB PD has the potential to deliver high levels of power, the USB eMarker feature is increasingly applied to active cables. The AP43770 includes the necessary support for eMarker technology, in order to detect and identify cables before power is delivered. Cable compensation is also supported.
When coupled with a suitable PWM controller, such as Diodes’ AP3108L, the AP43770 provides a total PD solution. It also features up to 8kb of OTP (for main firmware code) or MTP (for user configurable parameters). MTP memory can be used to set up power specification and protocol options to the manufacturer’s requirements.
Read more: USB PD CONTROLLER FROM DIODES SUPPORTS STANDARD AND PROPRIETARY PROTOCOLS FOR POWER DELIVERY
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What applications is the AP43770 well-suited for?
The device is suitable for AC adapters, power hubs, battery banks, and USB PD converters. -
Does the AP43770 support Qualcomm Quick Charge protocols?
Yes, it supports Qualcomm Quick Charge 4/4+ as well as QC3.0 and QC2.0. -
How does the device handle legacy protocol compatibility?
It maintains backwards compatibility through auto-detection of Battery Charging revision 1.2 and other legacy protocols. -
What is the adjustable range for the constant current driver?
The constant current driver is adjustable in 50mA steps up to 6A. -
Can the output voltage be varied based on load requirements?
Yes, the PPS feature allows voltage variation using augmented power data objects. -
How does the controller manage active cables?
It includes support for USB eMarker technology to detect and identify cables before power delivery. -
What type of memory is included for firmware configuration?
The device features up to 8kb of OTP for main firmware code or MTP for user configurable parameters. -
Which PWM controller pairs with the AP43770 for a total PD solution?
The AP3108L from Diodes is cited as a suitable PWM controller to couple with the AP43770.
