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DROK® DC-DC4.5-30V to 0.8-30V Constant Voltage and Current Buck Converter 12V to 5V 5A Step-down Voltage Regulator Module Board LED Driver Power Transformer with Turn Light and PWM Control for Solar Panels Auto Car

Brand:DROK

2.7/5

€
31.32

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

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EAN: 0619397028315

Categories Tools & Home Improvement, Industrial & Scientific, Electrical, Home Automation Devices, Modules,

Wide application: DIY power supply regulator; charging for electric devices, battery,solar panel; driving high power LED, car power supply. Has constant current/charge/ full charge LED indicator, operation more intuitive and convenient. With aluminum heat sink, makes the temperature of the module which work in large current for a long term lower and more stable. With short-circuit and over temperature protection, hence safe for use. Wide input voltage range(DC4.5-30V) and output voltage(DC 0.8-30V , continuously adjustable); Output constant current range: 0.1-5A.
Brand DROK
Country of Origin China
Input Voltage 5 Volts
Is Discontinued By Manufacturer No
Item model number 090482
Manufacturer DROK
Output Voltage 5 Volts
Package Dimensions 5 x 5 x 1 inches; 1.6 Ounces

2.7

9 Review
5 Star
52
4 Star
19
3 Star
0
2 Star
0
1 Star
29

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Scritto da: Chapman Flack
Know your application! This will not do constant-current (CC) if you have common negative
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?
Scritto da: Chicago John
Nice capabilities for the price
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.
Scritto da: Justin Lloyd
Overall I am happy with the product
I use this to charge batteries with both my 30W solar panel and 15VDC power supply. Output voltage varies somewhat with input voltage. There is a few tenths of a volt change when I switch from my 15V supply to my 18V solar panel. This will not be a problem for most use cases. Voltage is steady when load changes but drifts up a bit when there's less than about 30ma being drawn. This could be important if you are using the voltage regulator to charge batteries. You could put a small fan or 1/2 watt resistor off the output side(before the diode) if this was a problem in your application. This variation is within the allowable range for most electronic circuits and would be acceptable for most people. You will need to place a diode on the + side of the output to protect the circuit from reverse voltage if the supply voltage ever dips below the voltage at the output terminals. Overall I am happy with the product. It is well made and is easily adjusted. It has no problem being enclosed in a very small space. I've run it for several hours at about 3 amps in an enclosure barely larger than the device and the heatsink only gets warm. Good for most projects requiring adjustable current and voltage.
Scritto da: T. Ogilvie
The Constant Current feature is working great, and allows me to adjust the LED's for ...
I am using this to power about about 10 LED under-eave lights on my home. The Constant Current feature is working great, and allows me to adjust the LED's for just the right current to have the level of light I want, while ensuring that I won't burn them out. My total current draw with all 10 units is less than 2amps at about 18VDC, and this unit is running very cool and reliably. I haven't been able to get the constant voltage feature to operate, not that I need that, but I tried it for fun. No matter how far I turn the potentiometer, I just get the same output voltage as the source power supply. Mine may be a bad unit, but the constant current side is working wonderfully, so I don't care much that the constant voltage side is non-functional. Overall I am happy with the unit, and have had it in operation for a couple of months now.
Scritto da: Practical Guy
Excellent module with a settable charge status green/red LED indicator.
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.
Scritto da: LASounD
Good product but a bit noisy
Works great! A little noisy under load but who cares;)
Scritto da: BlondieSL
These are the best of all the types I have.
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.
Scritto da: Amazon Customer
New as advertised. Quick Delivery. Works well.
New as advertised. Quick Delivery. Works well. Simple to use.
Scritto da: PPP
Perfect
Nice product with CC and CV function, So far works great!!!

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