I want to design a LED driver that is compact and uses mostly SMD components. It will run 1 LED at 700 mA and 3 V, and be user dimmable with a PWM signal (0-100%) as well. Additionally, It will plug into a USB port to run off of 5 V.
My question is that which design will yield the least amount of SMD components?
The IC I've found is the ILD6070 (datasheet), which has a built-in PWM generator in which it's duty cycle can be controlled by applying 0.61 - 2.43 V. On the other hand, it can be supplied with a separate PWM signal.
The solutions that I can think of are:
My question is that which design will yield the least amount of SMD components?
The IC I've found is the ILD6070 (datasheet), which has a built-in PWM generator in which it's duty cycle can be controlled by applying 0.61 - 2.43 V. On the other hand, it can be supplied with a separate PWM signal.
The solutions that I can think of are:
- A linear regulator that's adjustable
- A PWM generator IC
- A timer like the 555, but this adds the most parts