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LM2596 DC-DC Buck Power Converter Module
Description:
The LM2596 DC-DC Step-Down Power Converter Module is a high-efficiency power management module that uses the LM2596 step-down chip to convert input voltage from 4V to 40V to an adjustable 1.5V to 35V output. The module has high-quality solid-state capacitors to ensure long-term stable operation and support high-efficiency conversion under high current loads. The output voltage of the module can be easily adjusted to meet the voltage requirements of various devices. Equipped with a built-in LED voltmeter, it displays the output voltage in real time, helping users to more conveniently manage and debug power, especially suitable for DIY projects, robots, battery-powered systems, etc.
Parameters:
Input voltage: DC 4V - 40V
Output voltage: DC 1.5V - 35V (adjustable)
Output current: 3A (max)
Conversion efficiency: 92% (max)
Switching frequency: 150KHz
Operating temperature: -45℃ to +85℃
Specifications:
Dimensions (L x W x H): 57 * 36 * 13mm
Weight: 21g
Product includes:
3 x LM2596 DC-DC step-down power converter module
SD
Reviewed in the United States on February 11, 2025
Great step down for the price. Only issue I saw was that the onboard display read a couple of tenths too high, I compensated with my own multimeter, no big deal.
Joe
Reviewed in the United States on January 13, 2025
This is a very much what you see is what you get product, it works as advertised and fairly intuitive. The screen printing is clear and descriptive/helpful
B. W
Reviewed in the United States on December 5, 2024
The voltage range of these 3 converters is quite large for input and output.I'll be using 12 volts mostly and ~24 volts occasionally.There are some sharp points on the bottom of the circuit board that will scratch and snag, so I've cut some cork board to fit the bottom and pressed it on for protection.Then I added some jumpers at each end for power connections.It takes a lot of turns on the variable screw to reduce the output voltage to 5.17 volts.There are some small discrepancies between the voltage readings on the converter and the readings from my multi-meter. Where the converter reads 5.17 volts, the meter reads 5.08 volts AND where the converter reads 13.6 volts, the meter reads 13.3 volts.I added some output connection options using 14 gauge copper which was on-hand.
Customer
Reviewed in the United States on December 5, 2024
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Jcat
Reviewed in the United States on December 30, 2024
I use these boards constantly to provide flexibility when prototyping, and to power devices from whatever batteries or DC supplies I seem to have on hand. They're really easy to use, I appreciate the on-board voltage display, and have been very stable sources, even in the presence of modest draw from small steppers and other peripherals. I haven't had a single one of these exhibit any problems, and recommend them.
bender
Reviewed in the United States on December 26, 2024
I always like to have a few adjustable DC-DC Buck regulators at hand, as they can be quickly added to any prototype or project where a regulated lower voltage is needed. These DC-DC buck modules use generic LM2596 ICs and have the added functionality of an onboard LED voltmeter that can read both input and output voltage. Here are my observations and some limitations of this board:Limitations:Voltage Adjustment Only: Only the voltage can be adjusted, not the current. This might limit its use in applications where precise current control is required. For example LED Lighting.Capacitor Rating: Although the listing states that the input can be up to 40V, the input and output no-name capacitors are rated at 35V. To avoid any potential issues, I would recommend not going above 25V input.Voltage Display Accuracy: The LED voltmeter display is slightly off and not very accurate.Current Capacity: The current capacity is listed as 3 Amps; however, this is not a heatsink design. The regulator uses the PCB as a heatsink, so I would limit the current to a maximum of 1 Amp to prevent overheating.Usability:It is a very generic LM2596 DC-DC buck regulator module with an added, though not very precise, LED voltmeter. It can be used in quick prototypes where the requirement for voltage and current regulation is not very precise. Despite its limitations, this module is still a useful addition to your electronics parts bin, especially for those who work on various DIY projects and prototypes.
P. Sjoman
Reviewed in the United States on December 2, 2024
For a very low price, comparable to just the LM2596 by itself, you get three nicely made circuit boards with on-board voltage display. The boards do not come with any instructions, but are very easy to use.On power-up the voltage display is off and the LED indicating Vin is lit. Pushing the button turns on the voltage display for the input voltage. Another push switches the display to the output voltage and the Vout LED is lit. Holding in the button for a few seconds turns off the voltage display.The output voltage is set by a multiturn (20?) potentiometer. I was able to adjust it down to 1.25V.On the board I tested, the voltage display was slightly high. At 24.0V it indicated 24.5V and at 12.0V it was 12.3V.I tested the board with a 24V power source. With the display off and no load the current draw was 20mA. With no load there was about 50mVp-p ripple. When set to 12V and using a 47ohm resistor load the ripple was 150mVp-p. By adding a 470µF capacitor to the output the ripple was reduced to 50mVp-p. The frequency of the ripple was 148kHz.These boards are great for many projects where you need to reduce a higher voltage.
Dave
Reviewed in the United States on December 13, 2024
These DC-DC buck power converter modules seem to be a standard design, that is commonly available from many different suppliers. This module will replace a busted module, that looks identical to this one. The voltage adjustment is a standard 10-turn pot, to give you better control, and finer voltage adjustment, but it will require a very small screwdriver to adjust, as others have pointed out. The voltage readout is handy for quick adjustments, and should be within a standard 10% margin of error, but if you need an exact voltage, then you'll want to use a proper VOM.
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