4-Channel USB QC3.0 Fast Charging Step-Down Module | 6-32V to 24W
4-Channel USB QC3.0 Fast Charging Step-Down Module | 6-32V to 24W
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Short Product Description
Short Product Description
The MH-KC24-4 is a 4-channel DC-DC step-down (buck) converter module designed to add multiple QC3.0 fast-charging USB ports to your DIY electronics. Accepting a wide 6V-32V DC input, it automatically adjusts the output from 3V to 12V to deliver up to 24W per port. Supporting major protocols like QC3.0, Huawei FCP, and Samsung AFC, it is perfect for car modifications, solar power setups, and custom charging stations. Available at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po.
Key Features
Key Features
- 4 Independent USB Ports: Charge up to four devices simultaneously at maximum speed without power throttling.
- Multi-Protocol Support: Compatible with QC2.0/3.0, Huawei FCP/SCP, Samsung AFC, MTK PE1.1/2.0, and standard Apple/BC1.2 charging.
- High Efficiency: Built-in synchronous switching technology delivers up to 97% power conversion efficiency, minimizing heat loss.
- Smart Voltage Adjustment: Automatically scales output voltage between 3V and 12V based on the connected device's fast-charge request.
- Comprehensive Protection: Features output overcurrent, input over/undervoltage, short circuit, and over-temperature protections.
- Flexible Input Options: Power the board via the standard DC barrel jack or solder directly to the clearly marked IN+ and IN- pads.
Full Product Description
Full Product Description
Wide Voltage Input for Custom Power Solutions
This step-down module accepts a broad input voltage range of 6V to 32V DC, making it highly adaptable for various power sources. Whether you are tapping into a 12V car battery, a 24V solar panel system, or a repurposed laptop power adapter, this board efficiently steps down the voltage to safely charge your USB devices. You can connect your power source easily using the center DC barrel jack or by soldering directly to the IN+/IN- pads.
Universal Fast Charging with 4 Independent Ports
Each of the four USB ports operates independently with its own synchronous buck converter chip, meaning you can fast-charge four different devices simultaneously without power sharing or speed drops. The module automatically communicates with your connected device to negotiate the optimal voltage (from 3V up to 12V) and current. It supports a comprehensive list of fast-charging protocols, including Qualcomm QC3.0, Huawei FCP/SCP, Samsung AFC, and MTK PE.
Technician Tip
Because this is a step-down (buck) converter, your input voltage must always be higher than your target output voltage. For example, to achieve a 12V fast-charge output, your input power source must be greater than 12V. Additionally, if you plan to run all four ports at their maximum 24W capacity simultaneously (96W total), ensure your input power supply can handle the load and consider adding a small heatsink or cooling fan to the board. If you need help selecting the right power supply for your DIY project, visit our physical store at Sun Cheong Computer Co. Ltd. in Sham Shui Po for expert advice.
Technical Specifications
Technical Specifications
- Model: MH-KC24-4
- Module Type: DC-DC Step-Down (Buck) Converter
- Input Voltage Range: 6V - 32V DC
- Output Voltage Range: 3V - 12V DC (Auto-adjusts based on fast-charge protocol)
- Maximum Output Power: 24W per channel (e.g., 4V@3.6A, 5V@3.4A, 9V@2.5A, 12V@2A)
- Conversion Efficiency: Up to 97%
- Switching Frequency: 220Khz
- Output Interface: 4x USB Type-A
- Input Interface: DC Barrel Jack / Solder Pads
- Dimensions: 90 x 45 mm
Delivery Options
Delivery Options
- Local delivery within Hong Kong and in-store pickup.
- Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
- Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
- Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
- In-store pickup details (location and time) will be confirmed by email or phone message.
- Delivery times are estimates and may be affected by weather or unforeseen circumstances.
FAQ Section
FAQ Section
Can I power this module with a 5V USB power bank?
No, this is a step-down (buck) converter, meaning the input voltage must be higher than the output voltage. Since standard USB charging requires at least 5V, your input power source must be 6V or higher (up to 32V) for the module to function correctly.
Will all 4 ports fast-charge at the same time?
Yes, each of the four USB ports has its own dedicated step-down chip and circuit. As long as your main input power supply can provide enough total wattage (up to 96W for all four ports at max capacity), all ports will fast-charge independently.
Does this board support fast charging for iPhones?
Yes, the module supports the Apple charging protocol and standard BC1.2, allowing it to charge iPhones and iPads at their maximum supported standard USB-A charging speeds.
What happens if I connect a device that doesn't support fast charging?
The module is completely safe for older or non-fast-charging devices. By default, the output is set to a standard 5V. The voltage will only increase to 9V or 12V if the connected device specifically requests it via a supported fast-charge protocol.
Is this charging module available for pickup in Hong Kong?
Yes, we stock the MH-KC24-4 4-channel fast charging module at our Sham Shui Po physical store. You can order it online for delivery or visit us during business hours for immediate pickup.
Target Users / Applications
Target Users / Applications
- Car & RV Modifiers: Tapping into a 12V or 24V vehicle battery to create a custom multi-port fast-charging station for passengers.
- Solar Power DIYers: Connecting the module to a 12V/24V solar charge controller output to charge phones directly from solar energy.
- Maker & Electronics Hobbyists: Building custom high-capacity power banks using 3S or 4S lithium battery packs.
- Workshop Organizers: Converting an old 19V laptop power brick into a centralized desktop USB charging hub.
