https://felixardyansyah.github.io/CH224A_MODULE_FGV/
This board is built around the CH224A, a compact and efficient power negotiation controller from WCH. The chip communicates with modern USB-C Power Delivery (PD) and Quick Charge (QC) sources, allowing your project to request a wide range of voltages beyond the standard 5 V — up to 28 V depending on the adapter’s capabilities. Control is flexible: voltages can be set using simple GPIO pin selection for lightweight applications or managed dynamically through the I²C interface for advanced use cases such as protocol detection and current monitoring.
The module is designed to be breadboard-friendly, making it easy to integrate into rapid prototypes or test circuits. A dedicated R2 footprint is provided for users who want to install a 1 kΩ resistor to simulate a USB-C e-marker. This allows the board to negotiate higher power profiles and draw up to 5 A of input current, without requiring a cable with a built-in e-marker chip. This feature expands the module’s usefulness in high-power embedded projects.
By offloading the complexity of PD/QC negotiation to the CH224A, this board makes it possible to safely draw higher voltages and currents from standard USB-C and QC power adapters without bulky external circuitry. It is well suited for powering ESP32/STM32 systems, battery chargers, or any compact device that requires more than 5 V input.
⚠️ !!! reminder CH224A is 5V sensitive it can kill your IC so becareful where you put your wire into !!! ⚠️
- Board Size: 23 mm × 15.24 mm
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Go to FGV_CH224X repo.
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Click the green Code button → Download ZIP.
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Open Arduino IDE.
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Go to Sketch → Include Library → Add .ZIP Library…
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Select the ZIP you just downloaded.
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Open the Arduino IDE.
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Go to Tools → Manage Libraries…
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Search for FGV_CH224X.
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Click Install.
Library link and If you want to buy the board(I’m working with local seller Freelab Jakarta, soo its only available in Indonesia):
– isPowerGood() read data type bool
the power good indicator from CH224A/Q active low mean voltage good = 0, voltage bad = 1
– setVoltage() write data type int
0:5V, 1:9V, 2:12V, 3:15V, 4:20V, 5:28V, 6:PPS mode(CH224Q), 7:AVS mode(CH224Q)
setVoltage(4)// trigger the usb to output 20V (only available in USB PD protocol)
– getCurrentProfile() read data type int
it output in int for example charger/powerbank that output 65W it will say 3250
– hasProtocol() write data type bool
CH224X1.hasProtocol(CH224X_I2C::PROTOCOL_BC) mean it using USB BC protocol
CH224X1.hasProtocol(CH224X_I2C::PROTOCOL_QC2) mean it using USB QC2 protocol
CH224X1.hasProtocol(CH224X_I2C::PROTOCOL_QC3) mean it using USB QC3 protocol
CH224X1.hasProtocol(CH224X_I2C::PROTOCOL_PD) mean it using USB BC protocol
CH224X1.hasProtocol(CH224X_I2C::PROTOCOL_EPR) mean it using USB EPR protocol
CH224X1.hasProtocol(CH224X_I2C::PROTOCOL_EPR_EXIST) mean the charger support EPR/Extended Power Range protocol
CH224X1.hasProtocol(CH224X_I2C::PROTOCOL_AVS_EXIST) mean the charger support AVS/Adjustable Voltage Supply protocol
for using CH224A/Q with power good
CH224X_I2C CH224X1(Wire, 0x23, PG_PIN) or
CH224X_I2C CH224X1(2, 3, 0x23, PG_PIN) depending of your pinout
for using CH224A/Q without power good
CH224X_I2C CH224X1(Wire, 0x23) or
CH224X_I2C CH224X1(2, 3, 0x23) depending of your pinout
and make sure in the setup you insert CH224X1.begin();
| CH224X Pin | Board Pin Example |
|---|---|
| SDA (5D) | A5 (Arduino, LGT8F328) → may differ on other MCUs |
| SCL (5L) | A4 (Arduino, LGT8F328) → may differ on other MCUs |
| PG (Power Good) | A7 |
| 5V | 5V |
| 3V | 3.3V |
| GND | GND |
| CH224X Pin | Board Pin Example |
|---|---|
| SDA (SD) | PB7 (STM32F103xxx) → may differ on other MCUs |
| SCL (SL) | PB6 (STM32F103xxx) → may differ on other MCUs |
| PG (Power Good) | PB5 |
| 3V | 3.3V |
| GND | GND |
| CH224X Pin | Board Pin Example |
|---|---|
| SDA (SD) | GPIO 5 (ESP32-S3) → you can choose other safe pins |
| SCL (SL) | GPIO 6 (ESP32-S3) → you can choose other safe pins |
| PG (Power Good) | GPIO 7 (ESP32-S3) → you can choose other safe pins |
| 3V | 3.3V |
| GND | GND |
In I2C mode, The default address is 0x22 or 0x23, for USB PD you can grab current data becouse USB PD talk via in both direction via CC line, while with USB QC2/3 protocol you cannot grab maximum charger/powerbank current can handle reason the reason QC talk via Resistor not via a logic like USB PD.
– isPowerGood()
the power good indicator from CH224A/Q active low mean voltage good = 0, voltage bad = 1
– setVoltage()
for CH224_AQ 0:5V, 1:9V, 2:12V, 3:20V, 4:28V
for CH224_K 0:5V, 1:9V, 2:12V, 3:15V, 4:20V
for using CH224A/Q with power good
CH224X_IO CH224X1(IO1, IO2, IO3, CH224_AQ, PG_PIN);
for using CH224A/Q without power good
CH224X_IO CH224X1(IO1, IO2, IO3, CH224_AQ);
for using CH224K with power good
CH224X_IO CH224X1(IO1, IO2, IO3, CH224_K, PG_PIN);
for using CH224K without power good
CH224X_IO CH224X1(IO1, IO2, IO3, CH224_K);
and make sure in the setup you insert CH224X1.begin();
⚠️ Reminder if you use 5V logic MCU you need 2K resistor if not your CH224X will release the magic smoke
| CH224X Pin | Need | Board Pin Example |
|---|---|---|
| SDA (IO1) | 2 kΩ resistor | A6 (Arduino, LGT8F328) → may differ on other MCUs |
| IO2 (SD) | 2 kΩ resistor | A5 (Arduino, LGT8F328) → may differ on other MCUs |
| IO3 (SL) | 2 kΩ resistor | A4 (Arduino, LGT8F328) → may differ on other MCUs |
| 3V | — | 3.3V |
| GND | — | GND |
| CH224X Pin | Board Pin Example |
|---|---|
| SDA (IO1) | GPIO 4 (ESP32-S3) → you can choose other safe pins |
| IO2 (SD) | GPIO 6 (ESP32-S3) → you can choose other safe pins |
| IO3 (SL) | GPIO 5 (ESP32-S3) → you can choose other safe pins |
| 3V | 3.3V |
| GND | GND |
In IO mode, you cannot do that much again it is the limitation of simple GPIO logic of CH224X but in the bright side is kinda simple and use less memory. with 3V logic MCU like STM32 or ESP32 you dont need any additional component, but if you use 5V logic MCU you need additional resistor
Also included in the repository are:
● An Arduino sketch that use all the function with specific wiring of your board the the module board or IC themself
● Recent copies of CH224X Datasheet in english and chinese in the Documents folder.
The board has an R2 footprint for simulating a USB-C e-marker. To enable this, solder a 1 kΩ 0603 resistor at R2. This allows the module to negotiate up to 5 A input current from a compatible USB-C PD source — without needing a cable with a built-in e-marker.
Active Protocols: PD
Voltage: 5.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 9.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 12.00 V | Max Current: 3000 mA ❌ Voltage not supported by charger
Voltage: 15.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 20.00 V | Max Current: 3250 mA ✅ Power Good: Output stable.
Voltage: 28.00 V | Max Current: 3250 mA ❌ Voltage not supported by charger
Active Protocols: PD
Voltage: 5.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 9.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 12.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 15.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 20.00 V | Max Current: 3250 mA ✅ Power Good: Output stable.
Voltage: 28.00 V | Max Current: 3250 mA ❌ Voltage not supported by charger
Active Protocols: PD
Voltage: 5.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 9.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 12.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 15.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 20.00 V | Max Current: 3000 mA ✅ Power Good: Output stable.
Voltage: 28.00 V | Max Current: 3000 mA ❌ Voltage not supported by charger
Active Protocols: BC, QC3
Voltage: 5.00 V | Max Current: 0 mA ✅ Power Good: Output stable.
Voltage: 9.00 V | Max Current: 0 mA ✅ Power Good: Output stable.
Voltage: 12.00 V | Max Current: 0 mA ✅ Power Good: Output stable.
Voltage: 15.00 V | Max Current: 0 mA ❌ Voltage not supported by charger
Voltage: 20.00 V | Max Current: 0 mA ❌ Voltage not supported by charger
Voltage: 28.00 V | Max Current: 0 mA ❌ Voltage not supported by charger
Active Protocols: BC, QC3
Voltage: 5.00 V | Max Current: 0 mA ✅ Power Good: Output stable.
Voltage: 9.00 V | Max Current: 0 mA ✅ Power Good: Output stable.
Voltage: 12.00 V | Max Current: 0 mA ✅ Power Good: Output stable.
Voltage: 15.00 V | Max Current: 0 mA ❌ Voltage not supported by charger
Voltage: 20.00 V | Max Current: 0 mA ❌ Voltage not supported by charger
Voltage: 28.00 V | Max Current: 0 mA ❌ Voltage not supported by charger
- CH224A_MODULE_FGV/
documents/- CH224X_English.pdf — WCH datasheet (English)
- CH224X_Chinese.pdf — WCH datasheet (Chinese)
Schematic/- CH224A_MODULE.pdf — Full schematic
- CH224A_MODULE.png — Schematic preview
Gerber/- Gerber_CH224A_MODULE — Gerber File
img/— Board photos, renders, pinouts- README.md
- LICENSE.md
The Arduino library code is licensed under the MIT License.
Copyright (c) 2025 Felix Ardyansyah
The documentation, schematics, PCB layouts, and design files for the CH224A module are licensed under the Creative Commons Attribution-ShareAlike 4.0 International License (CC-BY-SA 4.0).
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material for any purpose, even commercially
- Attribution — You must give appropriate credit, provide a link to this license, and indicate if changes were made
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🔗 Full license text: CC-BY-SA 4.0