Login|Register|Cart

3A High-Power Buck Converter with Dual Output (±5V/±12V Adjustable) – Positive to Negative Voltage Module

SKU: FA2200
Module Type

Dual-output buck converter
Output Voltage

±5V / ±12V (adjustable)
Maximum Output Current

3A
Input Voltage Range

6V – 30V DC (variant dependent)
Conversion Efficiency

Up to 90%
Output Polarity

Positive and negative rails
Protection

Overcurrent, thermal shutdown
Terminal Type

Screw terminals

The 3A High-Power Buck Converter with Dual Output is a versatile DC-DC power module designed to generate positive and negative output voltages from a single positive input supply. It is capable of producing ±5V or ±12V (adjustable) outputs with a 3A maximum current rating, making it an ideal solution for powering operational amplifiers (op-amps), audio circuits, dual-supply analog systems, and industrial control equipment.

At the heart of the module is a high-efficiency buck converter circuit combined with a voltage inversion stage that generates the negative rail. This allows the module to output a positive voltage (+V) and a matching negative voltage (-V) simultaneously, from a single positive DC input. This is particularly useful for circuits that require dual-polarity supplies, such as:

  • Operational amplifier circuits (op-amps)

  • Audio amplifiers and preamplifiers

  • Analog signal processing circuits

  • Sensor interfaces requiring bipolar supplies

  • Industrial control systems

  • Data acquisition systems

The module accepts a wide input voltage range (typically 6V to 30V DC depending on the specific variant), making it compatible with 12V and 24V systems as well as battery-powered setups. The output voltage is adjustable via onboard potentiometers, allowing you to set the positive and negative rails to ±5V, ±12V, or other required voltages within the module’s range.

The 3A maximum output current provides ample power for demanding analog and digital circuits. The module uses high-efficiency switching regulation (up to 90% efficiency), minimizing power loss and heat generation compared to linear regulators. This makes it suitable for battery-powered and portable applications where efficiency is critical.

The module features screw terminals for secure input and output connections, and the compact PCB design with mounting holes allows easy integration into equipment enclosures, project boxes, and control panels. The module includes built-in protection circuits including overcurrent protection and thermal shutdown, ensuring safe and reliable operation.

The positive to negative voltage conversion is a key feature. Unlike standard buck converters that only produce a positive output, this module generates both positive and negative rails from a single input — eliminating the need for separate power supplies or complex transformer-based circuits. This simplifies system design and reduces component count.

The module is widely used in audio equipment, operational amplifier circuits, industrial control, test and measurement instruments, analog signal processing, and any application requiring dual-polarity power supplies from a single input source.

Important Note: The input voltage must be higher than the absolute value of the desired output voltage. Always verify the voltage and current ratings match your application before installation. Ensure adequate ventilation for high-power operation.

Whether you are building an audio amplifier, designing an analog circuit, or adding dual-supply capability to a project, the 3A High-Power Buck Converter with Dual Output provides a reliable, efficient solution. It is suitable for individual makers, engineers, and businesses purchasing in bulk for product development or industrial applications.

Features

  • Dual output — Generates positive and negative voltages simultaneously

  • ±5V/±12V adjustable — Configurable via onboard potentiometers

  • 3A maximum output current — Ample power for demanding circuits

  • Positive to negative conversion — Creates a negative rail from a positive input

  • High efficiency — Up to 90% switching regulation

  • Wide input voltage range — Compatible with 6V–30V DC systems

  • Built-in protection — Overcurrent protection and thermal shutdown

  • Screw terminals — Secure input and output connections

  • Compact PCB design — With mounting holes for easy installation

  • Wide application range — Audio, op-amp circuits, industrial control, instrumentation

Technical Specifications

# Parameter Specification
1 Module Type Dual-output buck converter
2 Output Voltage ±5V / ±12V (adjustable)
3 Maximum Output Current 3A
4 Input Voltage Range 6V – 30V DC (variant dependent)
5 Conversion Efficiency Up to 90%
6 Output Polarity Positive and negative rails
7 Protection Overcurrent, thermal shutdown
8 Terminal Type Screw terminals

Usage

Getting Started

  1. Connect input power — Supply a DC input voltage (typically 6V–30V) to the IN+ and IN- terminals. Ensure the input voltage is higher than the absolute value of the desired output voltage.

  2. Set output voltages — Use a small screwdriver to adjust the onboard potentiometers while measuring the outputs with a multimeter. Set the positive rail (+V) and negative rail (-V) to the desired voltages (e.g., ±5V or ±12V).

  3. Connect the load — Wire your circuit to the +V, GND, and -V output terminals. The GND terminal is the common reference for both rails.

  4. Power on and test — Apply input power and verify the output voltages. Ensure the load does not exceed the 3A maximum current rating.

Output Configuration

Output Terminal Function
+V Positive output rail
GND Common ground reference
-V Negative output rail

Typical Applications

  • Audio amplifiers — Dual-supply power for op-amps and audio circuits

  • Operational amplifier circuits — ±5V or ±12V supplies for analog signal processing

  • Industrial control — Dual-polarity power for sensors and control systems

  • Test and measurement — Bench power for analog instrumentation

  • Data acquisition — Bipolar supplies for ADC/DAC circuits

  • Educational projects — Teaching dual-supply and voltage inversion principles

Notes for Business Buyers

  • Dual-output capability — Replaces separate positive and negative power supplies.

  • Adjustable output — Configurable for different voltage requirements.

  • High-current output — 3A rating covers a wide range of analog and digital circuits.

  • Suitable for bulk purchasing — Ideal for audio equipment manufacturers, industrial control integrators, and educational institutions.

Q: What is the 3A Dual-Output Buck Converter used for?

It is a DC-DC power module that generates positive and negative output voltages (±5V/±12V) from a single positive input supply, used for powering op-amps, audio circuits, and dual-supply analog systems.

Q: What is the difference between this module and a standard buck converter?

A standard buck converter produces only a positive output. This module also generates a negative rail, providing dual-polarity supplies from a single input — ideal for analog circuits requiring ±V supplies.

Q: What is the maximum output current?

The module provides up to 3A output current (total across both rails, depending on the variant).

Q: What is the input voltage range?

The input voltage range depends on the specific variant, typically 6V to 30V DC. The input must be higher than the absolute value of the desired output voltage.

Q: How do I adjust the output voltages?

Use the onboard potentiometers to set the positive and negative rail voltages. Measure with a multimeter to confirm the desired settings.

Q: What are the output terminals?

The module has +V (positive output), GND (common ground), and -V (negative output) terminals.

Q: Does the module have protection circuits?

Yes. It includes overcurrent protection and thermal shutdown for safe operation.

Q: Can I use this module with a battery?

Yes, as long as the battery voltage is within the input voltage range and higher than the absolute value of the output voltage.

Q: What is the conversion efficiency?

The module achieves up to 90% efficiency, minimizing power loss and heat generation.

Q: Can I purchase in bulk for a product development project?

Yes. This module is suitable for both individual users and business purchasing, including audio equipment manufacturers, industrial control integrators, and educational institutions.

Related products