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Constant Voltage or Current LED or Li Battery Driver/Charger
Stock No: 31562 PS
Number of Reviews:
Review this item
Non Isolated, adjustable DC/DC Buck (Step Down) Converter, Driver, Regulator with adjustable Constant Voltage out or adjustable Constant Current output for charging batteries or driving LEDs
Input: 5-35VDC Output: 1.5-30VDC
Input/Output Differential: 2V min.
Rated Current: 3A (10Watt limit without Heatsink)
Current limit: adj. 0-3A sets Max current
Charge Adj. : sets the threshold of toggle the Charg/Full Charge LEDs
This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
(This item was manufactured prior to August 31st, 2018)
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As of August 2018 the State of California has changed the requirements of the “Prop 65” law. We now must list on our website any possible chemicals the can cause cancer, birth defects or reproductive problem.
As an example:
ABS plastic contains styrene
PVC wire insulation can contain Di(2-ethylhexyl)phthalate (DEHP)
electrolytic capacitors can contain Ethylene glycol
Brass can contain Lead
flame retardant pc boards can contain Tetrabromobisphenol A (TBBPA)
Aluminum alloys can contain Chromium
To put it simply we are a small company and do not have the resources to test every single part, so we list every thing as hazardous. Please recycle all electronic parts responsibly and under no circumstance eat, drink or smoke these parts and wash your hands after touching!
Click here to review this item
Finally I think Ill get one.
The thing that stopped me from getting one before was Skip Frisbees complaint. These only buck, dont boost. But with item 34665 available boosts 12 V to 24 V, I can use this to build a 12V regulated battery charger from a 12 V source.
- Tom, VA
Good at what its for.
CV-CC works as advertized and very well too. FYI, set the desired voltages without load or with minimal load then set the max current. I use it for 18650 liPo calls set to 4.15 and 900ma for 2.8ah cells
At least 1 beef
I was hoping they were Buck - Boost regulators, but theyre only Bucking. In other words, the input voltage has got to be higer than the output voltage, Waaa.
- Skip Frisbee, CA
Awesome LED Driver
I design specific LED drivers for a living.... As a general purpose driver, this has no peers... At the moment, I am using this power supply to drive 24 inch sticks of 32 white leds arranged as 4 sets if 8 LEDs in series connected as 4 sets in parallel 12 Watts total, so I am using a small heat-sink on the regulator chip for a requirement of 24.8 Volts max 23.8V min at 0.5 Amps. As the LEDs warm up, their forward voltage drops keeping the current constant. This supply is so accurate, that the terminal voltage could be used to measure the substrate temperature of the light engine.
- Wayne Olmsted, FL
For constant R voltage and current are inversely related! Circuit works, 5 star, period.
Working as advertised
Folks it is constant current OR constant voltage not both at the same time. In order to maintain constant current the voltage has to adjust in relation and vice versa. This is normal.
Perfect for CV/CC
Only hiccup is tweaking current or voltage affects the other. Im using it for a LED and to avoid burning out a motor with too much current. Lots of power in a small package, and very versatile. When youve established the correct settings with your benchtop, just tweak this.
- t z, WA
Great multipurpose PS
It has enough current for large LEDS, or charging large Lithium batteries - it appeared to be set for that when it arrived 4.2v. Im using it to power a motor that has a heavy load limit the current to prevent burnout, but let it spin up. For projects where you need both voltage and current limiting its great. The only difficulty is the three resistors seem to interact - adjust the voltage and the charge indicator is lost. Change the current and the voltage drifts. Just a bit, but you will need a pair of meters and a lot of iterations to get it perfect. That takes away the 5th star - Im a bit nervous about the precision until I verify the settings. The holes for the power in and out are also a bit small for some wires but not really a problem.
- t z, WA
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