The 20W DC 3.6-30V Bidirectional Buck-Boost Converter Module is a versatile, high-efficiency power supply board designed to generate dual positive and negative output voltages from a single DC input. With a 20W maximum power rating and a wide input voltage range of 3.6V to 30V DC, this module is an ideal solution for powering operational amplifiers (op-amps), car audio systems, ADC/DAC circuits, and other applications requiring bipolar supplies from a single input source.
At the heart of the module is a bidirectional buck-boost converter circuit that can both step up and step down the input voltage to maintain a stable output. The ± dual output design generates both a positive voltage (+V) and a negative voltage (-V) simultaneously, eliminating the need for separate power supplies or complex transformer-based circuits. This is particularly useful for circuits that require dual-polarity supplies, such as:
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Operational amplifier circuits (op-amps)
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Car audio amplifiers and head units
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Audio preamplifiers and mixers
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Analog-to-digital converters (ADCs)
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Digital-to-analog converters (DACs)
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Sensor interfaces requiring bipolar supplies
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Industrial control and instrumentation
The module features quick-terminal connectors for fast, secure wiring without soldering. This makes it easy to integrate into car audio installations, bench setups, and prototype circuits. The screw-terminal design accepts bare wires directly and tightens securely for reliable connections.
The wide input voltage range of 3.6V to 30V DC makes the module compatible with a broad range of power sources including:
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Single-cell lithium batteries (3.6V–4.2V)
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5V USB power
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12V car and marine systems
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24V industrial supplies
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2S–6S lithium battery packs (7.4V–22.2V)
The 20W maximum power rating provides ample power for demanding analog and audio circuits. The high-efficiency switching regulation (up to 90%) minimizes 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 includes built-in protection circuits including overcurrent protection, thermal shutdown, and short-circuit protection, ensuring safe and reliable operation even under fault conditions. The compact PCB design with mounting holes allows easy integration into equipment enclosures, project boxes, and control panels.
The module is widely used in car audio systems, operational amplifier circuits, audio equipment, ADC/DAC circuits, industrial control, test and measurement instruments, portable electronics, and any application requiring dual-polarity power supplies from a single input source.
Important Note: The input voltage must be within the specified range (3.6V–30V) and the total output power must not exceed 20W. The positive and negative output voltages are typically equal in magnitude (e.g., ±12V, ±15V) but may be adjustable depending on the specific variant. Always verify the voltage and current ratings match your application before installation. Ensure adequate ventilation for high-power operation.
Whether you are powering a car audio amplifier, designing an op-amp circuit, or adding dual-supply capability to a portable device, the 20W DC 3.6-30V Bidirectional Buck-Boost Converter Module provides a reliable, efficient solution. It is suitable for individual makers, engineers, and businesses purchasing in bulk for product development or industrial applications.
Features
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Bidirectional buck-boost conversion — Steps up or down to maintain stable output
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± dual output — Generates positive and negative voltages simultaneously
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Wide input voltage range — 3.6V to 30V DC
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20W maximum power — Ample for audio, op-amp, and ADC/DAC circuits
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Quick-terminal connectors — Fast, solder-free wiring for easy installation
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High efficiency — Up to 90% switching regulation
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Built-in protection — Overcurrent, thermal shutdown, and short-circuit protection
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Compact PCB design — With mounting holes for easy integration
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Wide application range — Car audio, op-amp circuits, ADC/DAC, amplifiers, industrial control
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Module Type | Bidirectional buck-boost converter with ± dual output |
| 2 | Input Voltage Range | 3.6V – 30V DC |
| 3 | Output Voltage | ± Dual output (positive and negative) |
| 4 | Maximum Output Power | 20W |
| 5 | Conversion Efficiency | Up to 90% |
| 6 | Terminal Type | Quick-terminal / screw terminals |
| 7 | Protection | Overcurrent, thermal shutdown, short-circuit |
| 8 | Module Dimensions | Compact PCB with mounting holes |
