Test Review of LTC1871 Step Up 3-35V input to 3.5 to 35V output booster module

[@anthonyvolkman2338]

I absolutely love your channel! How you give all tje information on parts used and such and test them products so vigorously.

[@robojax]

Thank you. I am glad you found them useful. Thank you for not skipping the ads and keep watching them. This will help me a lot.

[@anthonyvolkman2338]

@@robojax Keep up the great work sir!

[@MrAlex3461]

Great, cheers. Just bought one of these to boost 2.5v, feel relatively confident using it on my expensive equipment that draws

[@robojax]

thanks

[@ICantCreateNormalNic]

Thank you for this great test.

[@macprofessor]

Thanks for that - saved me some work!

[@anonymousbutpopular]

the presentation of your video review makes a lot of sense than others...... keep up man!

[@robojax]

Thank you. Will do that.

[@HshsueHeueue-en1jo]

Thanks for the video

[@andrjooo]

Excellent Review!!!

[@medtn]

Great video , thanks for the testing

[@robojax]

You are welcome.

[@johnmellor6065]

thank you for so much information on this unit brilliantly explained

[@robojax]

You are welcome. Thank you for not skipping the ads and keep watching them. This will help me a lot.

[@djohnnineonesix820]

Actually I order that module and it's seems different a bit from the module you tested. I'm going to use to feed 2 TPA3118 modules to 26v. I'm upgrading my Bazooka bass tube twin Ta8225h system. Input from car battery with engine running 14.5v - - >26V The TPA3118 would be fine with 2 ampers

[@stephenshop4946]

Hi , what is the effeciency of this module if the input is 15v, then the output is 20v?

[@СергійФілімоненко-к7ц]

A very good test, thank you for a great job!

[@robojax]

you are welcome.

[@Ed.T]

I don't think that diode is for circuit protection, it's part of the boost circuit "D1" as seen on the LTC1871 datasheet.

[@robojax]

you may be right. I have to find the module and look at it again.

[@pooorman-diy1104]

This test missed very important step : To test it at 3V input ... which is the most important feature ...which is the voltage of Li-Ion battery/power bank (1S)

[@robojax]

Hi, I missed to replay to your comment. I just watched the video to know what I did. It doesn't work work below 3.3V. Also because of the display doesn't work below 4.5V, that was another reason. Thanks.

[@anthonyvolkman2338]

That dual schottky diode is actually supposed to be the blocking diode from the inductor to tje output capacitor. That's how boost converters use them. I noticed the inductor going to the drain of the fet and then branching directly to the diode while the other pins of the diode are gong to the positive output terminal.

[@robojax]

thank you for the comment. I appreciate it.

[@anthonyvolkman2338]

@@robojax My pleasure!

[@fayez8041]

Hello friend, what is the piece that raises the astronomy from 12 to 24 and gives an ampere of 15?Thanks

[@wilsard]

thanks for the testing, but the stapler noise sucks.

[@robojax]

You are welcome.

[@shorn77777]

Ahmad, could you tell us, if this can be connected in parallel. for high current 5 v to 12 v do we get any solution.

[@robojax]

Hi, yes you can use them in parallel but make sure you set both modules at exact output voltage and current

[@dastanharris]

im here for the 3v to 12v test..too bad you didnt do it

[@adamjamesdonovan]

Any idea if the LTC1871 would handle an input of 3 to 4.2v with a stable output of 10v @ 1.4amps for short periods and a normal operation at 600ma?

[@robojax]

at 03:24 (click on 03:24 to see it) I have shown that there is a power MOSFET, at the test shows you can get 4 times of 600mA you can get at 12V output watch it at 12:18. Yes definitely it will work because you demanding very low power.

[@truthbeknown8550]

Can I use this to charge Lithium Iron Phosphate battery from a car battery?

[@robojax]

I don’t remember if this has constant current or CC (you have to watch and find out) if it has CC then yes. For for one cell set voltage to 3.65V and for more cells multiply it bye that number. Then set the maximum charge current. Less than or equal to the capacity of battery.

[@dj_sorra8605]

For 5v, how many amperes does it output?

[@robojax]

That’s exactly I made this video for to answer . Please watch

[@pknapp6]

Is there a way for the output voltage to increase with an increase of the input voltage? I need to increase the speed of a welder feed motor but still needs to be adjustable. Turning the small adjustment screw each time is not practical.

[@robojax]

No. this is called regulator. The output always stay constant.

[@AaezI]

Thanks for the review! I have gotten a few different boards which use the LTC1871 IC, but the components used are a bit different than yours(capacitor and inductor values). Going to do some tests and compare to your results.

[@robojax]

You are welcome.

[@TheAiwnt]

Hi. Can i recharge a battery with this board?

[@robojax]

you can't do it with this because this does not have CC or constant current. Your batter will die if you charge it without controlling the current (ampere). See this video I've explained the module and charging battery kzbin.info/www/bejne/npyvdGl7mLieoqs

[@TheAiwnt]

@@robojax thank you for your reply. In my attempt to charge a battery i swap the plus with minus on the output, and now the board is dead. I check some parts on it but i can t find the broken one. From your experience what part from the board can be broken if you apply revers power on the output side?

[@gogs991]

Hello, i like your channel. Can you draw schematic of this board? with soldered components its hard to understand. Thanks in advance

[@robojax]

Thank you. this module is so cheap. if you try to make it, it will cost you more than twice. I have provided the LTC1871 datasheet where the schematic is used in this module.

[@gogs991]

@@robojax Thank you. I know it is cheap. Im trying to add this on my board. I can see that pin 1,2,3,4,5,8 are connected differently than on provided datasheet. And other values are in use. That part confuse me and thats why i ask for schematic

[@RockNRoll__]

Why the display of the device stopped?

[@robojax]

which part? mention the time like 2:30

[@Vahidkhbl]

its a crappy product but that doesn't mean you can claim fail on something thats is outside of the specs! the board is limited to 75W output max! and it will drop voltage to the same level becuz thats the way is intend to use (hi power LED and such with constant current) so plz read the specs and then claim the device is fail at delivering the specs.

[@robojax]

I did not because sellers on eBay or AliExpress or Amazon simply put the details from datasheet. so people should see the result at the condition this is sold.

[@Vahidkhbl]

@@robojax 99% of the of the links that i checked stated 65~75W! its hard to find a seller without that info.

[@robojax]

موفق باشید.

[@robertfaney4148]

You keep increasing the output voltage. Can you draw 2A with output at 5V max please ?

[@robojax]

Hi, I just watch the whole video to reply to you. I tried the toughest tests for this module. You did not mention the input. but you can come to conclusion from other tests.

[@robertfaney4148]

@@robojax Input is at 3.7 V - I need to know if you can draw an output current of 2A at output voltage set at 5V which is not shown in this video . Thank you.

[@irfantat4172]

You are trying to give 12 V from the input and get 30 V - 5 A, ie 150 watts from the output. Well, don't you ever calculate how many amps should be input from the input. 150 watts / 12 volts = 12.5 A. According to the manufacturer's data, you can give a maximum of 9 A from the input. In addition, according to the manufacturer's data, the maximum power of the module is 65 W! A little reason and logic!

[@cp1855]

Change intro image for 2 buttons.

[@robojax]

Sorry didn’t understand

[@R.O.E.]

I just using this for protection😅 this is good but display and output so so

[@robojax]

yes.

[@peterdkay]

Sounds like INPUT current is 5A max (not output current)

[@robojax]

NO. The input current can go above 6.5A.

[@peterdkay]

It appears unit fails when input OR output current goes significantly above 5A. e.g. at 3V input and 36V output it will fail when INPUT current goes above 5A. This means output current cannot go above 0.5A at 36V with 3V input.

[@robojax]

I reviewed the video and you are right. The input current is always 5A or less in all "passed" testes. Thank you.

[@peterdkay]

No problems. I love your channel and your professional reviews

[@robojax]

Your very kind. Thank you.

[@Валерий-ф6н1г]

Начал обзор преобразователя с одной кнопкой ,а потом перешло на двухкнопочный.

[@TheChemicalWorkshop]

looks kinda shit, not sure what else to get... :(

[@robojax]

what would I say.

[@damani662]

I buy one connected to my 12v 5A power supply....And suddenly fire fry up my board

[@robojax]

You connected the + and _ incorrectly. It should not burn.

[@damani662]

Robojax i check the polarity first but well....it start fire, the booster still give stable output

[@robojax]

Amazing. Good for you.

[@joyanjohnlewis5268]

practically it does not work....voltage drops gradually....when connected to devices

[@robojax]

You might have defective module. or your "device" or load needs very more power than this module can supply.

[@Boricuarecibo]

You have the equipment but you don’t know how make real tests.

[@robojax]

make a suggestion. I am listening.

[@Boricuarecibo]

@@robojax take in consideration the wire size, the voltage drop, due the use of an incorrect wire gauge. In the video only you show a input voltage. Use a line adjustable load. You use one that is good but you need to stop the process increase o decrease the amp's. Use one that have a potentiometer to make adjustments without disconnecting nothing.

[@robojax]

I used a wire that can handle 20A so I did not need worry about it. Adjusting is the most important part and I am planning to add more because people will say "will it output 18V if I input 5V?" so I have show them all possibilities. I am doing the review for current and voltage purpose. People don't need anything else. here is my latest video that a module failed kzbin.info/www/bejne/janbe5Wni5eXn5Y and another one which did not fail. kzbin.info/www/bejne/r6G5iWelmsd5fdE