Hello, I need your help, I need an expert who designs an electronic circuit that acts as a driver for a power LED, the circuit must have an input voltage from 3v to 18v and a 12v and 2.1A output ,
Help me do this
thank you

 

hi lidas,
Welcome to AAC.
It would easier to buy this ready made module, there are various specifications.
E
https://www.amazon.co.uk/DaoRier-Vo...09809&sr=1-3&keywords=dc+step+up+power+module

 

I know it well, I have seen those modules already made, but I need the scheme to create the pcb with the design I want, it goes inside in a place that must have certain characteristics

 

it goes inside in a place that must have certain characteristics

Define those characteristics. Any power-handling circuit will have some components of an irreducible size and fixed shape, and will need space to allow ventilation to dissipate heat.

 

Maybe I have not explained well and I apologize, I am able to do a pcb, what I can not do is invent the circuit, I just the scheme

 

Maybe I have not explained well and I apologize, I am able to do a pcb, what I can not do is invent the circuit, I just the scheme

Go to http://www.analog.com/en/products/power-management/led-driver-ic.html
On the page follow the links and you will find all you need to design your own schematic:
Product Selector Card
Evaluation Documentation
Application Notes
Technical Articles
Design Notes
LT Journal
Videos