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Queta

Queta 6 Pieces LM2596s DC to DC Buck Converter Step Down Voltage Regulator Power Module 3.2-40V to 1.25-35V 3A High Efficiency DC Voltage Stabilizer Volt Transformer LM2596 DC-DC Buck Converter

    • Based on 117 reviews
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Arrives Tuesday, May 21
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Features

  • INPUT VOLTAGE RANGE: DC 3.2V to 40V (The input voltage must be 1.5V higher than the output voltage
  • OUTPUT VOLTAGE RANGE: DC 1.25V to 35V continuously adjustable voltage, Maximum output current is 3A.
  • HIGH EFFICIENCY: Output with high power conversion efficiency up to 92%. Measured 12V input, 5V output current, 1A load regulation rate is less than 1%.
  • USE STEPS: Connect the power supply (3-40V), the power indicator light is on, and the module is working normally; adjust the blue potentiometer knob (usually turn clockwise to boost, counterclockwise to turn down) and use a multimeter to monitor the output voltage until it reaches the required voltage.This module can be used to debug a variety of system operating voltage ranges.
  • REQUIRES ATTENTION:It is recommended to use the current within 2.5A for long-term work, and add the scattered Hot plate (output above 10W); because it is a step-down module, in order to ensure stable output, please keep a small 1.5V differential pressure

Description

Description:Module nature: non-isolated buck (BUCK)Rectification method: non- synchronous rectificationInput voltage: 3.2V-40VOutput voltage: 1.25V-35VOutput current: 3A (maximum)Conversion efficiency: 92% (maximum)Switching frequency: 65KHzOutput ripple: 30mV (maximum)Load regulation: ±0.5%Voltage adjustment rate: ±2.5%Working temperature: -40 to +85Peripheral size: 432114 (length width height) (mm) Features:1.The module uses high-quality LM2596 chip, high efficiency (maximum 92%), low heat generation, and can easily bring 3A (short-term) current. It is recommended to use current within 2A for long-term work, and add a heat sink (above 10W) Output).2.This module uses the original Sanyo filter capacitor with low ESR, which can make the ripple voltage as low as 30mV, which is completely comparable to the linear power supply!3.This module uses machine placement, reflow soldering, and each module undergoes a two-hour aging test before shipment to ensure high reliability.​ Wiring: 1. Soldering, directly solder the power cord to the input (output) port2. Welding pins can be used by inserting pins through lead wires or inserting into holes on the board; or soldering the PCB directly after adding pins.


Brand: Queta


Current Rating: 3 Amps


Maximum Frequency: 65 KHz


Minimum Frequency: 50 Hz


Package Dimensions ‏ : ‎ 5.71 x 4.02 x 1.46 inches; 2.4 Ounces


Item model number ‏ : ‎ -1059579511


Date First Available ‏ : ‎ August 18, 2020


Manufacturer ‏ : ‎ Queta


Best Sellers Rank: #83,894 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #317 in Power Converters


#317 in Power Converters:


Customer Reviews: 4.4 4.4 out of 5 stars 117 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, May 21

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Top Amazon Reviews

    • So far so good. Stable output voltage, but a little inefficient.
Used the first of these to power a Raspberry Pi 4 with LCD screen, which kept reporting low voltage using a 5v supply with plenty of capacity. Problem was that powering the RPi4 through the LCD screen resulted in a slight voltage drop, and the RPi4 was getting a touch under 5v (and is VERY picky). Used this to run it from my 3D printers 24v power-supply with an output voltage of 5.15v, which has been completely stable. I even tested running it from my bench power supply and changing the input voltage pretty widely, from 18-26v and the output was still pretty stable. I've since used another one of these for powering other devices when I need two voltages from my single output bench power supply. (e.g.: 12v and 5v or 5v & 3.3v etc), and has been reliable (over a short time thus far). My only gripe is that they do get a little toasty when running and are a little less efficient than should be possible with the LM2596 regulator (though at the in/out voltages I've been using even the datasheet rating isn't exactly great efficiency ... these were just a bit below that rating). An extra heatsink on the regulator chip may help, and depending on your application some forced airflow might be a good idea in any sort of enclosed space. ... show more
Reviewed in the United States on May 24, 2023 by Lee
    • Decent adjustable buck regulator but finicky to adjust
I bought this for use in a project that had varying DC inout voltages (12V - 16V) to power a circuit that needed 9V DC.In order to set the output voltage you have to turn the trimpot and measure the output voltage until it is set to the value that you want. The problem I found was that the trimpot wasn't very linear - there was a wide range of turning motion with a small change in output voltage and then suddenly the output voltage would quickly change as the trimpot was continued to be turned. I don't know how stable the output voltage would be, especially in a high-vibration environment, if the trimpot wiper moves around internally. If I were using this in a high-vibration environment, I would set the output voltage using the trimpot, measure between the wiper and each leg, then replace the trimpot with fixed high precision resistors. The other attributes of the board look good - clean PCB design, good components and ample sized input and output solder pads that can accept a DuPont header pin. ... show more
Reviewed in the United States on August 14, 2023 by Michael Bender
    • Great DC converter! ( Includes tips for new users )
These Queta DC-DC Buck converters work great! All six of the DC converter modules I received today performed exactly as expected. When the output is set to 3 volts, their output voltage only sagged about 10 mV when drawing a half amp, so they are regulating the output voltage pretty well under load. A WORD OF CAUTION to people who are not used to working with these buck converters - it may seem at first like they are not working correctly. When you first take them out of the package, they are typically set for maximum output, so the DC input and output voltages will probably be the same. So this means that initially you should NOT hook up the device you intend to power with this buck converter. You MUST first set the output of the module to the desired output voltage level, before you connect your device to it, or you could potentially FRY the unit that you were intending to power this converter with! When you power the module up, set the DC input voltage to the buck converter to somewhere between 7 to 14 volts DC. Using a jeweler's screwdriver, turn the small brass screw on the blue trimpot about 10 turns counter-clockwise. Assuming you are monitoring the module's output with a DC multimeter, after you surpass 9 to 10 turns of the trimpot you should start to see the output voltage drop. Now adjust the trimpot until you reach the intended DC output level. For a 3W "star type" high power LED, this could be about 3 volts. For an Arduino Uno, it might be around 6V > 7V. One other thing you might want to check before permanently wiring the module to your intended load device. With the converter module powered up, monitor the DC output voltage to make sure that when you connect your device to the output, make sure that the output voltage does not "sag" too much. If the voltage drops by more than say ~ 30 to 100 mV when you connect your load device, there might be a problem .... otherwise it is probably working just fine. ... show more
Reviewed in the United States on August 15, 2022 by LaserDoc
    • Works great for Raspberry Pi
Powers a Raspberry Pi 3B+ on my 12v 3D printer perfectly. I didn't find the voltage adjustment pot to be as finicky as other have complained. It's a multiturn pot, and with a good screwdriver, some patience, and an accurate voltmeter I was able to dial it in to 5.10v exactly with no trouble. Great product. ... show more
Reviewed in the United States on November 7, 2022 by Joshua Bluhm
    • so useful
these are so easy and useful for instance to power small 5v fans from a 12v power source
Reviewed in the United States on December 23, 2022 by JB
    • Exactly what I needed. I hope it lasts for a few years.
This little DC to DC converter is perfect for a little project that I'm working on. So far it's working perfectly... I just hope that it lasts more than a few weeks. (So many of these just don't last, even when used significantly below their stated current limits.) I'd be thrilled if this lasted a few years in my project. It's reasonably priced, and easy to use! ... show more
Reviewed in the United States on May 22, 2022 by J_Doe
    • The Bad Batch
I've used these regulators in the past to provide a regulated 5V from a 12V source with great success, but the last batch I bought were all bad. NONE of them were adjustable beyond Vin - 1V.. Like I said, I've used these before, so I know what I'm doing. I believe the trimpots are all bad, perhaps due to supply chain or due to too much heat used to solder these boards during assembly. Unfortunately I bought these a year ago for my parts bin and only now am I trying to use them, so it's too late to get a refund. Moral of the story - if you buy these, test them immediately when the package arrives from Amazon, using alligator clips (don't solder anything to the boards). Hopefully if you too get a "bad batch", you'll be able to return them for a refund. ... show more
Reviewed in the United States on August 15, 2023 by Thomas Didymus
    • They work.
So far I've only used one of these but it's working fine. I used it to power several LEDs. The voltage is stable and it's nice and small so it was fairly easy to find a place to install it inside my project.
Reviewed in the United States on March 24, 2021 by The Tin Man

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