I need to design a led driver of up to 1A, to drive some infrared and near infrared LEDs.
Due to the nature of my application, the intensity of the light should be as stable as possible, as fluctuations in the radiation intensity cannot be allowed.
So far I have considered using Buck Converters as the LM3405 or the TPS92515 from Texas Instruments, however on any DC / DC switching converter, there is always a ripple at the output.
1.- Does this mean, that there will be variations in the intensity of the light ?
2.- If so, Is it better to go for a Linear Regulator solution? (using a MOSFET, Op amp etc)