The LT3743 is a fixed frequency synchronous step-down DC/DC controller designed to drive high current LEDs. The average current mode controller will maintain...
LT3743 on Analog.com
I've the LT3743 demo board. It works fine but seems to be to complex to drive a simple LED ON/OFF.
The LED charactetistics are Vf 3.14V and I 8A.
Thanks for you help.
You can try inputting your specifications on the link below to find most suitable IC to use.
LED Driver IC | Analog Devices
My power supply is 12V