This is a 20 W adjustable DC-DC buck converter module with digital display. It is based on LM2596 3A step-down voltage regulator and supports an input of 0~40 V DC with an accuracy of ± 0.05 V.

On a regular buck converter there is no display and you have to measure the output manually with a multimeter, which can be slow and inefficient. This buck converter has a display with the output voltage readout integrated right in to the board. You can change the output by adjusting a screw potentiometer that is also integrated on to the board. Simple!

This module can be used in DC applications such as batteries, power transformers, DIY adjustable power supplies, 24 V vehicle power supplies, industrial equipment, 12 V to 3.3 V, 12 V to 5 V, 24 V to 5 V, 24 V to 12 V, 36 V to 24 V and so on.

The on-board voltage meter supports self-calibration mode. You only need to calibrate it once and the value will be stored automatically. The method is as follows:

• Hold the button for 4 seconds. Release the button to enter input voltage calibration mode (“IN”is ON) ; Hold the button for 4 seconds and release the button to enter output voltage calibration mode (“OUT” is ON); hold the button for 4 seconds, and release the button to exit calibration mode, all parameters will be save automatically.
• In calibration mode, click the button to adjust the value.

Features:

• Supports self-calibration function to provide high-precision voltage output. (Recommended input voltage is maintained at 4.5 V or more)
• Touch the button to switch the measurement input or output voltage, and an indicator shows which voltage is being measured.
• The display can be disabled if necessary. Hold the button for 2 seconds, and release the button to turn off the display
• With wire terminals, no soldering is necessary
• The input voltage is 4.0 ~ 40 V. (The input voltage must be 1.5 V higher than the output voltage)
• Continuously adjustable output voltage range of 1.25 V ~ 37 V. (The input voltage must be 1.5 V higher than the output voltage)
• The Maximum output current is 3 A, it is recommended to use within 2.0 A, higher currents will need a heatsink to dissipate heat.
• The output power is 20 W. For more than 15 W a heatsink is recommended.
• The unit offers high conversion efficiency, with an average of 88%
• The unit includes reverse polarity protection, overheating protection and short circuit protection

• Input Voltage: 4.0 ~ 40 V
• Output Voltage: 1.25 V ~ 37 V
• Output Power: 20 W
• Output Current: 3 A
• Mounting Dimensions: 6.1 x 3.1 cm / 2.4 x 1.22 inches (L x W)
• Dimension: 6.6 x 3.6 x 1.2 cm / 2.59 x 1.42 x 0.47 inches
• Weight: 22 g

Warranty: 90 days

• Warranty will not apply if Product fails or is damaged after delivery to you due to accident, abuse or misuse.

Package Includes:

• 1 x 20 W Adjustable DC-DC Buck Converter with Digital Display