Yobett New 2PCS Lm2596 Add Heat Sink DC-DC Buck Adjustable Step Down Power Supply Module Converter Output 1.23v-30v
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- Brand New with High Quality
- LM2596 DC-DC Buck Converter Step Down Module
- 2pcs with Reasonable Price
- Input: DC 4V to 35V (input voltage must be higher than the output voltage to 1.5v above can not boost)
- Output: DC 1.23V to 30V voltage continuously adjustable, high-efficiency maximum output current of 3A
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2pcs LM2596 Adjustable Power Module
Condition:100% Brand New with High Quality
Module property:Non-isolation buck
Rectification mode:Non-synchronous rectification
Type: LM2596 Adjustable Power Supply Module
Input Voltage:DC 4V-35V
Output Voltage:DC 1.23V-30V
Work temperature:-40℃- +85℃
Quantity:2pcs as A Set
Note:Please make sure all of the "IN-" "IN+" "OUT-" "OUT+" marks are inserted Rightly,otherwise the modole will be damaged.
Top Customer Reviews
In addition to saving me money, these are so much more efficient and have a more consistent output voltage than a linear regulator. Linear regulators waste so much power just turning it into heat, which can be a real problem because they require bulky heat sinks and even still they can get hot enough to burn your fingers, melt plastic and just simply be a pain in the butt.
These buck converters don't heat up at all with a 600mA load, and barely get warm to the touch with a 1500mA load. You'll never have to worry about heat issues with these things. The output voltage is very stable, and DOES NOT DROP AT ALL (seriously) as the load increases.
Voltage and Current were measured with a FLUKE multimeter which is less than one year old:
No Load: Vo = 6.80 V
500 mA Load: Vo = 6.80 V
1000 mA Load: Vo = 6.79 V
1500 mA Load : Vo = 6.78 V
Finally, these are very small (a fraction of the size of a 3A linear regulator board) so they can easily fit into whatever device you are planning on using it in. The PCB design is clean and simple, and its connections are clearly labeled.
My only caution is that If you are planning on using these in a "set-and-forget" application which is sensitive to over/under voltage, I highly recommend that you put some hot glue over the trim pot screw after you set the output voltage. I say this because it is all to easy to accidentally bump the trim screw and mess up the output voltage set point.
First, don't let your voltage get low because rather than cutting off like you might hope they will simply keep trying to supply power at below the voltage level. This could damage some electronics, so use some sort of limiter (like a CJKIT-20462) to protect from low voltage if it matters for your application. (and the life of your battery!)
Second, they will audibly oscillate when drawing more than about 1A from a higher voltage source. You can hear the high pitched whine if you have sensitive ears. This annoying feature can be mitigated by lowering the input voltage.
* Third, and critical if you are operating on battery power: if your voltage source is substantially higher than the output voltage, this may burn a lot of amps even when the load draws little to nothing. My setup involves converting 25-28V down to 12.25V and sometimes (but not always) by my measurement this wastes 1.5A in the converter, with the actual load drawing only 50mA. Bringing the voltage down to 20V or lower will drastically curtail this waste.
So you might think to wire these into a 24V system in series to deal with that issue, but they don't seem to tolerate being wired in series with each other. Only one or the other seems to work at any given time in my installation.
This order came straight from China, so it took two weeks to fulfill, but the price was good.
I will use another one in the next project. Those regulators are tiny, yet efficient, so they do not dissipate too much heat.
I used a dab of liquid electrical tape to semi-permanently hold the potentiometer in my desired position.
One small downside... not really a downside, more of a note is the response time of the unit, apply a load and the device has to churn around a little bit before it stabilizes the voltage. I have not measured it but it may be confusing something I am powering with it. I have measured similar 'sag' when using one as a battery pack replacer in a hand held marine vhf radio when I hit the send key.