[8-PACK] LM2596 DC-DC Adjustable Buck Converter 3-40 V to 1.5-35v Step Down Power Supply High Efficiency Voltage Regulator Module …

Product Features

Parameters:
Input Voltage: DC 3 -40 V
Output Voltage: DC 1.5 – 35 V
Output Current: 3A(MAX) It is recommended to use under 2A (NOTE: When using high power, add a heat sink to the power supply chip)
Load adjust ratio: +/-0.5%
Voltage adjust ratio: +/-2.5%
Transferring efficiency: 92% Max(the higher output voltage, the higher efficiency)
ON/OFF frequency: 150KHz
Output ripple: 200mV
Module feature: buck and non-isolated
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Input voltage range： DC 3 -40 V (input voltage must be 1.5 V higher than the output voltage, no boost)
Output voltage range：Output: DC 1.5 – 35 V voltage is continuously adjustable, maximum output current is 3 A
With over-temperature and short-circuit protection, hence it is safe to use.
Easy to make it work and convenient to accurately adjust the output voltage with a mini screwdriver.
100% SATISFICATION SERVICE: If there are any problem with our products, please feel free to contact us. you can request a refund for any single module and no need to return it.; Any problems you can contact us and we will try our best to resolve it till you satisfied.（Note：The factory have tested these at max voltage so they are very high by default, takes about 15-20 turns CCW before the voltage starts ramping down)

This entry was posted in Solar Panels & 12 V and tagged 1.535v, 8Pack, Adjustable, Buck, Converter, DCDC, Down, Efficiency, High, LM2596, Module, Power, Regulator, Step, Supply, Voltage. Bookmark the permalink. - by admin | October 11, 2018

3 Responses to [8-PACK] LM2596 DC-DC Adjustable Buck Converter 3-40 V to 1.5-35v Step Down Power Supply High Efficiency Voltage Regulator Module …

Robert Nerison says:

October 11, 2018 at 11:55 am

4 of 4 people found the following review helpful

… just received 2 of these and so far so good. They have a nice look to them, November 21, 2017

By

Robert Nerison –

Verified Purchase(What’s this?)

This review is from: Buck Converter DC to DC 5A 75W Input 4-38V Output 1.25-36V Step-Down Regulator Power Module 36V 24V 12V to 5V 2A Voltage ([1-Pack] Buck with Led) (Electronics)

So I just received 2 of these and so far so good. They have a nice look to them, plenty of led’s to indicate their functionality (power on, input, and output voltage modes, etc.), and the voltage display reads well! I have tested the two I received with a DMM and the display is quite accurate (it is accurate to .1 v so if you have 7.65v actual it rounds up to 7.7v). The potentiometer takes a few turns to adjust, but once the voltage begins to move it moves quickly. I have yet to try out the .01v fine adjustment process using the buttons as it is not that critical for my application… so no comment there.

All in all this is one of the best $6-7 (each) I have spent on amazon,–works as promised and they look neat. Time will tell the story of reliability, but for now I think these are just awesome!

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james emerson says:

October 11, 2018 at 12:37 pm

2 of 2 people found the following review helpful

Received exactly what was described by the seller. Unit …, March 2, 2018

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james emerson –

Verified Purchase(What’s this?)

This review is from: Buck Converter DC to DC 5A 75W Input 4-38V Output 1.25-36V Step-Down Regulator Power Module 36V 24V 12V to 5V 2A Voltage ([1-Pack] Buck with Led) (Electronics)

Update: Seller responded without hesitation and fixed the issue promptly. Will gladly purchase the same unit again knowing that the seller stands behind their product. If i could give more then 5 stars I gladly would. Update 3/17/18 – ive had to bump down to 3 stars. I went to connect power today only to bevwelcome by a flash and smoke. Seems a smsll peice on the board failed for sime reason. This happened hooking to a 12v SLA battery. Received exactly what was described by the seller. Unit arrived packaged well and functions as it should. So far with hours of use using voltage packs from 12v to 48v the unit has had no problem maintaining a solid 11.1v output I have it set to. Well gladly purchase again for future projects.

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Anonymous says:

October 11, 2018 at 12:39 pm

Be wary of the pot — otherwise, great., September 30, 2018

By

Bill (Tequesta, FL United States) –

Verified Purchase(What’s this?)

This review is from: [8-PACK] LM2596 DC-DC Adjustable Buck Converter 3-40 V to 1.5-35v Step Down Power Supply High Efficiency Voltage Regulator Module … (Electronics)

I have used these quite a bit. The weakness is the 10-to-20 turn trimpot. I did some testing and if the pot wiper loses its internal connection (as pots do over time), poof — there goes whatever these are connected to. The output voltage goes UP not down. That’s a backward design. Otherwise, these are terrific when they are working. I have done two different things to protect the circuitry and components that these power. First, I use a separate over-voltage monitoring circuit (OVP – over-voltage protection). It’s a watchdog so if/when the pot or other part fails, the OVP knows as a “crowbar circuit” protects things. Secondly, I use a similar circuit with Opto-isolator that I connect up to this board’s regulator chip, Pin 5. This pin is the inhibit INHB and is active LOW. This means as long as it’s tied to ground or floats, there is output. But, connecting this pin to more than a few volts and it harmlessly shuts down the regulator. So, I use this pin and a “watchdog” circuit to turn off this little jewel at the first sign of voltage runaway. I use these mostly for +5v. I set them for precisely +5.05. If the voltage reaches uncontrolled +5.5v, one of the two methods I mentioned will kick in and shut down this board. Finally, in cases where the circuits being powered are more expendable, I have removed the trimpot and replaced it with a fixed resistor value selected to provide the output desired. Any engineer who has been around the block knows that trimpots eventually do develop noise. The best brands of trimpot in my opinion are Bourns. Most of these boards use a word to resemble this brand but they are NOT. That’s a clue so it’s your call. These BUCK boards are a great substitute for heat-laden linear 7805s, 12s, or whatever. Highly recommended.

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