LED Driver circuit explained - Constant current vs Constant Voltage - Let there be light

LED Driver circuit explained. We explore AC-DC conversion with Full Wave Bridge Rectifier, DC-DC conversion with Buck Converter and Constant Current source. Tie it all together to understand how the LED driver works as a whole.
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[@ishinalyandi9278]

i think this is the best video but i think you should shade more light on differences between constant voltage driver and constant current

[@Bmens71]

The best explanation so far!

[@theweb2guy]

Glad it was helpful!

[@ww07ff]

Great explanation!!!

[@amitkumarsingh5822]

Very good explanation

[@cantkeepitin]

Hi, why do we have the diode, the inductor and cap at 12:23 ? Isn't the cap huge in comparision with the large ohmic resistor of 154kOhms?

[@farisk9119]

Thanks I found the link. Cheers

[@lambertax]

In the constant current schematic you give, the mosfet is in a linear region (bad efficiency). So it will heat much more than in the constant voltage circuit. How do we have the best of the 2 world?

[@ruru.904]

sir how can i make led driver using dc to dc boost converter and dc to dc buck converter in the same circuit .I mean how can make the connections between this dc converters and LED

[@OthmanAlikhan]

Thanks for the video =)

[@drory1]

very good explaination

[@4philipp]

We need a driver that connects existing LED lights to poE, and adds an external switch. Remote computer control might be a nice touch too. Sigh, a man can dream. I think such a Driver would push poE into the consumer market and power up DIYers.

[@ahmedmohsen89-tx3hj]

what is the benefit of the diode between the inductor and the positive output and is it shotky diode or not ? thanks❤❤❤

[@miqbal7032]

How to design LED constant voltage source in everycircuit

[@miqbal7032]

How to create hysterises curve in everycircuit app for Schmitt triger

[@ashokkumarkanithi7279]

What about the power factor of the AC supply? Also Electrolytic capacitor (EC) reduces the life time of the LED Driver, so how to remove EC? but the output should be constant.

[@theweb2guy]

Good question. The buck converter has a very goof PF. For the capacitance you can use a brand like Nichicon, which has a good life. Normally engineering is a balance between cost and performance.

[@jojotech4615]

Sir new subcriber from Philippines

[@theweb2guy]

Thanks for subbing!

[@jitendrabakliwal7494]

very nice sir

[@theweb2guy]

Thanks and welcome

[@farisk9119]

Hi, what is the on line link of free simulator please? Thanks

[@theweb2guy]

www.falstad.com/circuit/ incase others are also looking.

[@abdulfaheem38]

Hello I'll be thankful if you help me regarding power supply of my led Cob led which I got is flipflop type and its of 100w and on data sheet it mentioned 3500ma current and 34v but problem is ,I am not finding exact same output driver but someone suggested me to use two 50w and one 20w driver parallely connented (1500ma+1500ma+600ma=3600ma) by doing this it's exceeding 100ma current and even when I test voltage of that driver it show 48v... Will it be safe to power up the led or it'll damage the led? connecting driver parallely is a good idea to get my required current? On data sheet it's mentioned Forward current =3500ma Peak forward current (duty 1/10@10ms) =5250ma please help

[@theweb2guy]

I don't think this is a good idea. If you want to use drivers in parallel, you need to make sure they are all exactly the same voltage and have reverse voltage protection. If not the drivers will be damaged. 48v is quite high and will possible damage the LED. This doc will give you some idea on the issues with using drivers in parallel - www.cui.com/catalog/resource/download/current-sharing-with-power-supplies.pdf

[@abdulfaheem38]

Thanks sir... If you don't mind ,can you share me your mail id...I'll mail you data sheet of my led..upon that can you suggest me best power supply to that led?

[@abdulfaheem38]

Sir can I take 36v 5amp SMPS and connect it to dc step down module and adjust current to 3.5amp and use it...will it work?

[@theweb2guy]

I would not advice that. SMPS do not normally maintain constant current which is what you need for the leds to be uniformly bright.

[@abdulfaheem38]

Then what you will advise me sir... Neither I am not getting driver nor I can use with SMPS... Can you advise me please

[@nitesh_thakur3798]

I want to make dimmable led driver

[@sarathsamarasinghe2462]

Sorry, it’s too advance for me. Meanwhile it’s very quick. Thank you.

[@putra6106]

Let there be sound....

[@ashwin372]

What's RMS ?

[@SunilKumar-me4cs]

Rms means " Root mean square".. Simply we can say for easy understand an " average "