|Item Weight||0.3 ounces|
|Product Dimensions||5 x 3 x 0.7 inches|
|Item model number||90393|
|Manufacturer Part Number||90393|
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DROK LM2577 DC Boost Power Converter 3-34V to 4-35V 3A Adjustable Step Up Voltage Regulator Board
|Price:||$6.51 & FREE Shipping on orders over $25. Details|
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- It is a high efficiency non-isolated boost module, the output Voltage can't be less than input Voltage
- Input Voltage: DC 3-34v; output Voltage: DC 4-35v(continuously adjustable)
- Input current: 3a(max); output current: 2 5a(max)
- Connection: welding, pin can be soldered directly to the PCB
- Multiple application such as DIY an output adjustable mobile power, boost charger, charge your electronic devices, etc
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Module Properties: non-isolated step-up module
Input voltage: DC 3-34V
Output voltage: DC 4-35V (adjustable)
Input Current: 3A (MAX)
Output current: 2.5A (MAX)
Output power: natural cooling 15W, heat sink 25W(MAX) (heat sink is not included)
Conversion efficiency: 90%
Operating Temperature: Industrial (-40°c to +85°c) (if ambient temperature exceeds 40°c, lower power use, or enhance heat dissipation)
Full load temperature rise: 45°c
No-load current: Typical 15mA (5V to 12V)
Load regulation: +/- 0.5%
Voltage regulation: +/- 0.5%
Dynamic response speed: 5% 200uS
Short circuit protection: None (Please Install fuses and protection circuits at Input port.)
Input Reverse Polarity Protection: None (Please Series diode at the input port.)
Installation: You can screw (diameter 3 mm), 2 fixing holes
Connection: Welding, pin can be directly soldered to a PCB
Conversion efficiency(for reference only):
In 3.7V Out 5V/1.0A 81%
In 5.0V Out 12V/0.5A 84%
In 7.4V Out 12V/0.5A 90%
In 7.4V Out 12V/1.0A 88%
In 12V Out 16V/1.0A 92%
In 12V Out 16V/2.0A 90%
In 12V Out 19V/1.0A 91%
In 12V Out 19V/1.5A 92%
In 12V Out 24V/0.5A 89%
In 12V Out 24V/1.0A 88%
1x DC Converter
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Top Customer Reviews
If you want to step up DC voltage to a higher level, this is great for that.
You've got one input port (power and ground) as well as one output port (power and ground). No soldering required. Just insert the power and ground wires on both ends and tighten down with a screwdriver. I love how easy it is to connect and disconnect things. Since you don't have to solder or unsolder anything, it's super easy to attach and later remove if you wanna connect something else.
The LED display can display both the input and the output voltage. Press the button to change. Press and hold the button for 3 sec to disable the display. Press it again to turn the display back on.
To change the voltage, use a flathead screwdriver to turn a little screw near the top. I was able to adjust the output between 5V and 40V.
The output voltages look correct when compared with two other multimeters.
I've been running 1A through it with no problems. I know it's rated for more but I haven't run more through it.
It comes in an antistatic bag and well packed with a lot of bubble wrap around it to ensure it arrives safe and sound.
No instructions come with it, but it's simple enough to figure it out on your own. :)
Very happy with my purchase! Now to get a housing for the unit. :)
Some thoughts about this model though -
- The screw terminals are ok, but they're a bit cheaper than the ones on the other converters I've bought
- The pointometer seems very cheap; sometimes you'll be going down, and the power will stay steady for a bit, then suddenly jump in one direction or the other (yeah, sometimes going up when you're turning it down.) And sometimes it'll go slowly then suddenly jump by almost a volt. So be aware of the super (in?) sensitivity, and probably don't have a sensitive load connected when adjusting the output voltage
- the digital voltmeter built in is not very accurate; mine's off by almost half a volt when compared to both my DVM and the other DROK unit I have. And unlike the other DROK models, it seems like you can't calibrate it either. So, the volt meter will stay off, which is sad.
So far, once you get the voltage finally picked, it seems to hold pretty steady. The load I'm pulling through it is about 0.2A, so I can't say how it does under higher load, but so far it seems ok, which in reality is what's important.
So my bottom line, at least after owning it for all of 5 hours, is that if you want the voltmeter, get a different one. But if you just care about holding the output steady, and don't plan on adjusting it after you've got it set, this will probably work out ok.
**UPDATE (following morning)**
When I woke up this morning, I went to check and see how this was doing, and the output voltage had dropped by almost half a volt overnight, so I had to re-adjust it again. Hopefully it stays steady this time, but if it ends up being unreliable and I have to adjust it regularly, I'll end up returning it and picking up one of the other ones.
**UPDATE 2 (the day after that)**
When I got home from work last night, the voltage had dropped by almost half a volt...again. So, I tried to readjust it again, and went through the same arduous process of trying to adjust the voltage, with it jumping up and down randomly when I was trying to get it back up to 23.8v again. (Since it's been so flaky, at this point I've been setting it just under 24v in case it decided to jump instead of drop.)
**UPDATE (the following morning)**
When I got up this morning, the voltage had jumped up from the 23.8v I'd set it to last night to 24.1v :/ So, I unplugged my bridge from it and plugged back in the old wall wart that I'd hoped to replace, and submitted an RMA to Amazon to return it, which is sad :/ Hopefully I just got a flaky unit and others are fine, but this one has been nothing but trouble for me unfortunately :/
Edit: The seller is very kind and will help you if you message them. After messaging with the seller about what happened, they suggested that I try a higher voltage (5V->12V) instead of (3.7V->12V) which makes sense because of the higher conversion efficiency. It still didn't work but they were very willing to resend/refund for the product. I changed my original 1/5star to 4/5star because the seller is nice and the product does indeed work(if not for just a brief time). Hopefully this doesn't happen again with the one they are re-sending.
Edit(again): the replacement works perfect. been using if for a couple months now without fail. I recommend that your voltage and current difference is not too distant on high current loads. also on a similar product by a different seller, the trim potentiometer seems to fail often but is easily replaceable if you have soldering skills.
Most Recent Customer Reviews
Just received this today. Connected it to a 12V computer power supply to measure and adjust output voltage to 14.5 volts.Read more