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Feature:
Module properties: non-isolated step-down module (BUCK)
Input Voltage: DC 4.5-30V
Output Voltage: DC 0.8-30V
Output Constant Current Range: 0.1-5A
Operating temperature: -40°c to +85°c
Working frequency: 300KHz
PWM control frequency range: 100-300Hz
Conversion efficiency: up to 95%
Short circuit protection: YES ( the Limit current is the Setting constant current value)
Over-temperature protection: Yes (Over-temperature Automatically shuts down the output)
Input reverse polarity protection: None ( please install diode at input port )
Output anti irrigation protection: None ( please follow the picture to install the Anti-irrigation diode )
Charging indication: charging Red light, full charged Green light
Installation: four 3mm screws
Wiring: Connection: V-IN input, V-OUT output
Dimensions: 60x26x20mm
Some Application:
DIY voltage Regulator, with constant current, can protect the load.
The power supply for electronic equipment.
For a variety of battery charging, Setting the charging voltage and charging current according to the different voltage and battery capacity, with charging indicator, convenient to observe the state of charge.
solar panels power supply for battery charging, With constant current, which prevents battery overcharge.
Driver high-power LED, Free series-parallel combination, With PWM control input, Available SCM to Control the LED brightness (PWM control frequency range 100-300Hz).
Use as a car power supply, Power supply for electronic equipment.
Package Include:
1x DC Converter
JS_Austin
Reviewed in the United States on August 22, 2021
Unit was bench tested upon receipt. Output voltage equaled input voltage. Current and voltage adjustments had no effect.Checked the potentiometers. Current adjustment ok. Voltage adjustment was not. One side was dead short. Resistance of other side would not change.I replaced it with a DROK DK SD15W40V-ADJ (buck only) which worked flawlessly.
Chapman Flack
Reviewed in the United States on August 17, 2020
This is a well-made module that passed all tests on the bench and worked fine. Constant-voltage (CV), constant-current (CC) mode both work. But you have to know some details of where you will use it.One end of the board has two input terminals, IN+ and IN−. On the other end are two output terminals, OUT+ and OUT−.This board expects to supply your load between OUT+ and OUT−, and for the CC feature, it measures the current in the path between OUT− and IN− (that R010 resistor seen on the solder side appears to be the current-measuring shunt).What that means is if you use this device in a setting where IN− and OUT− are connected by any external path (say, both grounded to the body in a vehicle), this device will not see the amount of current flowing, and the CC feature will be useless. (I am glad I tested on the bench, and the power was coming from a supply that had its own current limit, which saved the day.)DROK's store shows a lot of similar modules, so I opened a question on their forum to ask if any of the other ones will work and do CC in a circuit with common negative. Sadly, their answer was "We are sorry so far there are no similare items can meet the requirement of common ground."Giving four stars because the module is fine for what it is, I can't fault it for having a certain limitation, but the description should have said so.Meanwhile, I used "Ask a Product Question" above, and so far it has only attracted one, wrong answer. After testing and checking with DROK, I know the right answer now, but I'm apparently not allowed to supply the right answer to my question. Could somebody who sees this and is not me please add the right answer to the question, so that isn't forever showing the wrong info?
Customer
Reviewed in Canada on December 22, 2019
New as advertised. Quick Delivery. Works well.Simple to use.
PPP
Reviewed in Canada on October 23, 2019
Nice product with CC and CV function, So far works great!!!
BlondieSL
Reviewed in Canada on October 6, 2018
I was using a different one for a project, but it was getting super hot, even with 2 heat sinks on it.I decided to use this one instead. At the same current draw and voltage, this one only gets slightly warm, as expected.I will order some more, very soon.
Daniel
Reviewed in the United States on February 7, 2017
BROKEN DID NOT WORK. DO NOT BUY THIS PRODUCT! Did not work no matter what i did I tried turning pots all 1 way nothing. Tried all other way nothing. Tried both directions and nothing the product is just a wqaisted item worthless do not buy this item I do not even have a link to speak to the dealer to maybe get a new working item so sad now I am out my money. Well lesson learned no more electronic parts from this guy. I purchased this item to help me with my powering of elwire signage i made for Alice in Wonderland The movie through the looking glass and now I will be past my deadline over defective item thank you so much.
Chicago John
Reviewed in the United States on January 14, 2017
I got this to use along with an inexpensive 12VDC 10A power supply to limit current in high power LED's. While output constant current is limited to 0.1 - 5.0 amps, it should handle 5-6 10W LED's. After verifying that it works properly, I decided to add a DROK 0.28" DC 0-100V 10A Digital Current Tester Gauge Red Green Bright LED Display to facilitate setting voltage and current. Unless current adjustments are to be made infrequently, I think it's too cumbersome to put a meter in series with the load every time. That is no longer an issue with the DROK display I added. The resulting system works exactly as I'd hoped it would.The PWM capability is a feature that will be of use to me driving LED's. While instructions are sparse, I found that the key to using PWM is the "key" contact point. I soldered a male header to the three holes provided -- GND, PWM, and KEY, from left-to-right, respectively. If KEY is connected to GND, output power is cut. I would presume this may have been intended for use with an on-off switch. If PWM is grounded, however, no effect is seen. But when PWM and KEY are connected, power is cut.I tried using a 2N2222 transistor on one of the Arduino's PWM data pins with an analog write, and after using the "setPwmFrequency" to put the frequency within the necessary range of 100 - 300 Hz. For this I divided the native frequency 31250 of pin 11 by 128 to give a frequency of 244 Hz. Pin 11 was connected through a 1 kOhm resistor to the base of the transistor with PWM and KEY on the collector and emitter, and this seems to work for PWM dimming of the LED's, although I don't have a lot of experience with it yet.So while this system won't handle over about 60 watts, it should be fine for my current intended use. I'll update this review if I encounter negatives in either the buck supply or the DROK meter and display.
LASounD
Reviewed in Canada on May 9, 2016
Works great! A little noisy under load but who cares;)
Practical Guy
Reviewed in Canada on March 31, 2016
What an excellent find this was! I'm working on a USB/solar/12v accessory chargeable super-capacitor flashlight and this module produces a great constant voltage and current. I did 3 different tests and feeding the input 12.8v DC from a car battery, 4.97v DC from a USB wall-wart and 5v from a small solar panel produced output at 2.6-2.7v DC on the once I had it set. The amperage I set to 2amps and it is also constant. The other nifty thing with this is that it has a green/red LED that can be set to a voltage. So I set that to 2.6v to match the output and once my super cap reaches that value the charge LED turns from red to green so you know its charged. This is a great feature on this module.
Paul F. Welsheimer
Reviewed in the United States on March 25, 2016
I have a couple of these guys - different models but they perform flawlessly!! I am using them for theater props to bring down a rechargeable pack to 5v at 4.5 amps. They do not draw much power at all in stndby and run cool even when supplying max amps.
nomad68
Reviewed in the United States on April 11, 2014
Does an efficient down conversion that works well in my battery charger application. Easy to set up by cranking the voltage pot to 13.4 and the current limit to just below the max output of the recycled power brick that's driving it. The third pot sets the LED voltage/current indicator threshold. Green when in voltage mode (indicates battery is floating at 13.4), red when hard charging in constant current mode and flickers between green and red when approaching full charge. Always runs cool and made a precision battery charger out of an old 19 volt power brick that would have gone in the trash otherwise.
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