The 12V to 5V Dual USB DC-DC Buck Converter converts a 12V DC power source into a regulated 5V USB output, providing two USB Type-A charging ports for compatible devices.
Designed for automotive, motorcycle, robotics, and DIY applications, the module provides up to 3A total output current and 15W maximum output power. Its compact epoxy-sealed housing provides added protection for installations exposed to demanding environments.
With synchronous rectification and conversion efficiency of up to 96%, the converter provides efficient 12V-to-5V power conversion with built-in overload, overcurrent, overheat, low-voltage, and short-circuit protection.
Key Features
- Converts 12V DC to 5V DC
- Dual USB Type-A female output ports
- Up to 3A maximum total output current
- Maximum output power: 15W
- Up to 96% conversion efficiency
- Synchronous rectification
- Non-isolated buck converter design
- Epoxy-sealed protective housing
- Overload protection
- Overcurrent protection
- Overheat protection
- Low-voltage protection
- Short-circuit protection with automatic recovery
- Soft-start function
- Low output ripple
- Compact and easy to install
- Suitable for automotive and embedded applications
Dual USB Charging Ports
The converter provides 2 × USB Type-A female ports, allowing compatible 5V USB-powered devices to be connected directly.
The two USB ports share the converter's available output capacity.
12V to 5V DC Conversion
The module converts:
12V DC Input → 5V DC Output
This makes it useful for adding USB power outputs to systems that already operate from a 12V DC electrical supply.
3A Maximum Output
The converter provides:
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Output Voltage: 5V DC
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Maximum Total Output Current: 3A
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Maximum Output Power: 15W
The 3A rating should be treated as the total available output across the converter, not 3A from each USB port simultaneously, unless otherwise confirmed by the manufacturer.
High Conversion Efficiency
Using synchronous rectification, the converter provides a specified conversion efficiency of up to:
96%
High efficiency helps reduce energy loss and heat generation, particularly in battery-powered and automotive applications.
Protection Features
Built-in protection features include:
- Overload protection
- Overcurrent protection
- Overheat protection
- Low-voltage protection
- Short-circuit protection
- Automatic recovery after supported short-circuit conditions
These protection functions help improve reliability when the converter is used within its specified operating limits.
Epoxy-Sealed Housing
The converter uses an epoxy-sealed enclosure designed to provide additional protection for the internal electronics.
This makes it suitable for installations such as vehicles, motorcycles, robotics, and equipment where the converter may be exposed to dust or moisture.
The exact IP protection rating is not specified, so the module should not be assumed to be suitable for continuous immersion in water.
Wiring
The input wiring is color coded for easy installation:
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Red Wire: Positive (+12V)
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Black Wire: Negative / Ground (GND)
Always verify polarity before connecting the converter.
Technical Specifications
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Product Type: DC-DC USB Buck Converter
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Converter Type: Non-Isolated Step-Down
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Rectification: Synchronous Rectification
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Input Voltage: 12V DC
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Output Voltage: 5V DC
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Output Interface: 2 × USB Type-A Female
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Maximum Total Output Current: 3A
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Maximum Output Power: 15W
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Conversion Efficiency: Up to 96%
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Soft-Start Time: Approx. 500ms
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Output Ripple: ≤50mV (20MHz Bandwidth)
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Dynamic Response: Approx. 5% / 200µs
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Input Positive: Red Wire
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Input Negative: Black Wire
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Total Cable Length: Approx. 145cm
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Construction: Epoxy-Sealed Housing
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Short-Circuit Protection: Yes, Automatic Recovery
Typical Applications
- Cars
- Motorcycles
- Automotive electronics
- USB charging installations
- Robotics
- DIY electronics
- Embedded systems
- 12V battery systems
- Electronic projects
- Portable equipment
- Vehicle dashboards
- GPS devices
- USB-powered accessories
- 12V to 5V conversion
Installation
Connect the converter input to a suitable 12V DC source:
- Red → +12V
- Black → GND / Negative
The USB devices can then be connected to either of the two USB Type-A output ports.
For automotive installations, appropriate wiring protection and an inline fuse are recommended.
Important USB Charging Note
This module provides a 5V USB power output. Charging speed depends on the connected device and the USB charging protocol it requires.
The supplied specifications do not state support for protocols such as USB Power Delivery (PD), Quick Charge (QC), or other fast-charging standards.
It should therefore be described as a standard 5V USB power/charging converter unless additional charging-protocol support is confirmed.
Important Current Note
The maximum specified output is 5V at 3A / 15W total.
When two USB devices are connected simultaneously, they share the available output power. Actual current supplied to each device depends on the connected loads and the module's supported USB charging configuration.
Package Includes
Additional wiring accessories, fuse, mounting hardware, USB cables, and USB devices are not included.
