DC 6V–40V to 5V 3A Dual USB Step-Down Converter Module
DC 6V–40V to 5V 3A Dual USB Step-Down Converter Module
Dual USB Step-Down DC-DC Converter Module — Charge Two Devices at Once
Power and charge your USB devices anywhere with this compact DC-DC step-down (buck) converter module. Accepting a wide input range of 6V to 40V, it efficiently steps voltage down to a steady 5V / 3A output — perfect for in-vehicle charging setups, solar power systems, DIY electronics projects, and portable power banks.
Featuring dual USB ports, this module lets you simultaneously charge two smartphones, tablets, or other 5V USB-powered devices from a single DC power source. The onboard LM2596-based switching regulator delivers up to 92% efficiency, keeping heat low and battery drain to a minimum.
Key Specifications
- Input Voltage: DC 6V – 40V
- Output Voltage: 5V (fixed)
- Maximum Output Current: 3A (supports two devices simultaneously)
- Conversion Efficiency: Up to 92%
- Switching Frequency: 150 kHz
- Operating Temperature: -40°C to +85°C
- Module Dimensions: 59mm (L) × 21mm (W) × 17mm (H)
- Output Ports: Dual USB Type-A
- Regulator IC: LM2596
Who Is This For?
- DIY Electronics Enthusiasts — integrate into custom power supply projects
- Vehicle Owners — add USB charging to cars, trucks, boats, or motorcycles with 12V/24V systems
- Solar & Off-Grid Builders — step down panel or battery voltage to USB-friendly 5V
- Power Bank Builders — add dual USB output to your custom battery pack
Why Choose This Module?
- ✅ Wide 6V–40V input — compatible with 12V, 24V, and beyond
- ✅ Charge two devices at the same time, up to 3A total
- ✅ High 92% efficiency — minimal wasted energy and heat
- ✅ Compact, lightweight, and easy to integrate
- ✅ Reliable LM2596 switching regulator for stable output
Made in Mainland China.
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Frequently Asked Questions
Q: What input voltage range does this DC-DC step-down converter module support?
A: This module accepts a wide input range of DC 6V to 40V, making it compatible with standard 12V and 24V vehicle electrical systems, as well as solar panels and other variable DC sources up to 40V.
Q: Can I charge two devices at the same time with this dual USB converter?
A: Yes! The module features two USB Type-A output ports and supports a combined maximum output of 5V / 3A, allowing you to charge two smartphones or similar USB-powered devices simultaneously.
Q: How efficient is this step-down converter, and will it get hot during use?
A: The LM2596-based switching regulator achieves up to 92% conversion efficiency, which means very little energy is lost as heat. The module also has a wide operating temperature tolerance of -40°C to +85°C, making it reliable in a variety of environments.
Q: What types of devices can I power or charge with this module?
A: Any USB 5V-powered device is compatible — including smartphones, tablets, Bluetooth speakers, GPS units, dash cameras, and more. It's ideal for vehicle chargers, DIY power banks, and off-grid solar charging setups.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.