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Four green circuit boards with silver heat sinks and blue potentiometers

KEHIPI

KEHIPI 4PCS LM2596HV AC/DC to DC Step Down Buck Converter Power Adapter

SKU CH-W127-29V3E

Four adjustable buck-converter modules accept AC 5-30 V or DC 5-50 V input and deliver 3.3-33 V output at up to 2.2 A continuous current

  • Color4PCS
  • Adjustable output from 3.3 V to 33 V for flexible projects
  • Accepts AC 5 V to 30 V or DC 5 V to 50 V input
  • LM2596HV high-voltage chip handles up to 50 V input
  • Built-in heat sink supports 2.2 A continuous and 3 A peak current
  • Four modules per pack ready for multiple builds

4-Pack Adjustable Buck Converter Modules

This set includes four LM2596HV step-down boards that accept AC 5-30V or DC 5-50V input and deliver an adjustable DC output from 3.3V to 33V. Each module features a built-in rectifier bridge for direct AC connection and a dedicated DC input terminal. The integrated heatsink supports sustained 2.2A operation with short bursts up to 3A. Clear silkscreen labels on both sides of the PCB aid correct wiring during assembly.

Replaces Fixed-Voltage Wall Warts

The wide input range lets you power 12V, 15V or 24V loads from varied sources such as 24V industrial supplies or 36V battery banks. Switching efficiency reduces heat compared to linear alternatives, making the jump worthwhile when input voltage exceeds output by a large margin. The adjustable potentiometer allows precise voltage setting for prototyping, LED drivers or sensor arrays without stocking multiple fixed modules.

Verify Your Source Voltage

Ensure your AC source stays within 5-30V or your DC source within 5-50V to avoid exceeding the 50V capacitor limit. Confirm the load does not require more than 2.2A continuous current, as higher draws need additional cooling. Check that the required output voltage falls between 3.3V and 33V and that the input-to-output differential meets the buck topology minimum. Solder connections carefully using the labelled pads to prevent damage.

Highlights

  • Adjustable output from 3.3 V to 33 V for flexible projects
  • Accepts AC 5 V to 30 V or DC 5 V to 50 V input
  • LM2596HV high-voltage chip handles up to 50 V input
  • Built-in heat sink supports 2.2 A continuous and 3 A peak current
  • Four modules per pack ready for multiple builds

Specifications

BrandAITRIP
Color4PCS

Questions about this item

What are the AC and DC input voltage ranges for this LM2596HV buck converter module?

The module accepts AC input from 5 V to 30 V and DC input from 5 V to 50 V, with the 50 V limit set by the filter capacitor withstand voltage.

How do I adjust the output voltage and which terminals do I solder for AC versus DC input?

Turn the onboard potentiometer to set the output between 3.3 V and 33 V; use the rectifier bridge terminals for AC input and the dedicated DC input port for DC supply, checking the silk-screen labels on both sides of the PCB before soldering.

What continuous and peak output current can this module sustain with its heatsink fitted?

With the external heatsink installed, the module runs stably at 2.2 A continuously and can handle short bursts up to 3 A.

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