Drivers, how leds are adapted for different battery voltages

[Pseudowok]

Thanks for this post, it really helped clarify some of the terms I have seen thrown around. I think it will make my search for an appropriate driver for my project a bit easier.

 

[eh4]

Sticky!

 

[CuriousOne]

There are also Flyback drivers, they deliver much higher output voltage than at input, say input can be 6 volt, but output - 40-50 volts. Seen this in some chinese lanterns, where a lot of 5mm leds are connected in series and driven by higher voltage.

 

[HKJ]

There are also Flyback drivers, they deliver much higher output voltage than at input, say input can be 6 volt, but output - 40-50 volts. Seen this in some chinese lanterns, where a lot of 5mm leds are connected in series and driven by higher voltage.

I do just call it a boost driver, it could be based on flyback, but at the time I wrote this multichip leds was not common.

 

[CuriousOne]

These designs use transformer to boost voltage, and with just two transistor circuit, it is possible to have CC mode, which is definite plus for cheapivitiy

 

[Arizona_Mike]

This is a great write-up.

Mike