DC-DC Step-Down CC/CV Converter Module 300W 12A | 7–32V In

DC-DC Step-Down Constant Current & Constant Voltage Module – Up to 300W / 12A

This high-performance non-isolated step-down CC/CV (Constant Current / Constant Voltage) converter module is engineered for demanding DIY electronics, battery charging systems, and LED driver applications. Built with a dedicated IC and high-precision current-sensing resistor, it delivers exceptionally stable output with minimal temperature drift — making it a reliable choice for hobbyists and engineers alike.

Key Features

• Wide Input Range: DC 7–32V input; DC 0.8–28V continuously adjustable output
• High Output Current: Rated 9A continuous, up to 12A peak (add cooling fan if power tube exceeds 65°C)
• Adjustable Constant Current: 0.2–12A fully adjustable via onboard potentiometer
• Up to 300W Maximum Output Power
• Conversion Efficiency: Up to ~95%
• Operating Frequency: 300 kHz
• Low Output Ripple: ~50mV at 24V in / 12V out / 5A (20MHz bandwidth, excluding noise)
• Industrial-Grade Operating Temperature: -40°C to +85°C
• Precision Current Stability: Temperature drift <1% over 20°C–100°C range
• Turn-Lamp (Indicator) Current: Automatically set to 10% of constant current value (e.g. CC = 3A → indicator threshold = 0.3A)
• Dual-Color LED Indicator: Red = charging in progress; Green = fully charged / no load
• Four High-Frequency Filter Capacitors: Reduce output ripple and enhance stability
• Short-Circuit Protection: Yes (constant current limiting)
• Wiring: Screw terminal connections for easy hookup
• Load Regulation: ±1% | Voltage Regulation: ±1%
• No-Load Current: ~20mA (typical, at 24V→12V)
• Dynamic Response Speed: 5% / 200µS
• Lowest Dropout: 1V

Potentiometer Adjustment

• CV Potentiometer (near input terminals): Clockwise = increase voltage; Counter-clockwise = decrease voltage
• CC Potentiometer (near output terminals): Clockwise = increase current; Counter-clockwise = decrease current

Specifications at a Glance

Package Contents

• 1 × DC-DC Step-Down CC/CV Converter Module

Made in Mainland China.

For more guidance on safe electronics and electrical component practices, visit the U.S. Consumer Product Safety Commission (CPSC) and explore electrical safety standards at OSHA Electrical Safety.

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Note: Monitor color calibration and lighting conditions may cause slight variation from actual product appearance. Allow for minor manual measurement deviations in the listed specifications.

Frequently Asked Questions

Q: What is this DC-DC step-down CC/CV module used for?

A: This constant current / constant voltage step-down converter module is ideal for battery charging, LED driver circuits, and general power regulation projects where you need a stable, adjustable DC output lower than your input voltage. Its wide adjustable range (0.8–28V output, 0.2–12A current) makes it versatile for many DIY and professional electronics applications.

Q: Do I need a cooling fan with this module?

A: For lighter loads, no fan is required. However, if the power transistor (MOSFET) temperature exceeds 65°C — which may happen at higher current draws (close to 12A) — it is strongly recommended to attach a heatsink and/or add an active cooling fan to maintain stable performance and extend component lifespan.

Q: How do I adjust the output voltage and current?

A: Use the two onboard potentiometers. The CV (voltage) potentiometer, located near the input terminals, controls output voltage — turn clockwise to increase, counter-clockwise to decrease. The CC (current) potentiometer, near the output terminals, controls the constant current limit — clockwise increases current, counter-clockwise decreases it.

Q: Does this module have reverse polarity protection?

A: No. This module does not include input reverse polarity protection or output backflow prevention. Always double-check your wiring polarity before connecting power to avoid damage to the module or connected devices.