The USB PD Adapter is a USB Power Delivery trigger and monitoring board that enables you to use almost any USB Type-C PD power supply to run your projects with different selectable voltages and high currents. Important values such as voltage, current, power and energy are displayed on the OLED. The USB PD Adapter is based on the cheap and easy-to-use CH224K multi fast charging protocol power receiving chip, the INA219 voltage and current sensor IC, and an ATtiny204, 214, 404, 414, 804, 814, 1604 or 1614 microcontroller.
- Design Files (EasyEDA): https://oshwlab.com/wagiminator/attiny814-usb-pd-adapter
The 78L33 is a simple and inexpensive voltage regulator that can convert input voltages up to 30V to an output voltage of 3.3V with an output current of up to 200mA and a dropout voltage of 1.7V. The 78L33 supplies all elements of the circuit with 3.3V.
The CH224K is a USB PD power receiving protocol chip, which integrates PD3.0/2.0, BC1.2 and other fast charging protocols, automatically detects VCONN and analog E-Mark chips, supports up to 100W power, and has built-in PD communication module. It also integrates output voltage detection internally to support overheating and overvoltage protection. It features:
- 4V to 22V input voltage
- PD3.0/2.0, BC1.2, QC3.0/2.0, AFC and other fast charging protocols
- USB Type-C PD, positive and negative insertion detection and automatic switching
- E-Mark simulation, automatically detects VCONN, supports 100W power PD request
- requested voltage can be dynamically adjusted through a variety of methods
- high integration of single chip, simplified peripheral and low cost
- built-in over-voltage and over-temperature protection module
The output voltage is selected via three configuration pins of the CH224K, which are connected direc