I want to drive my LED circuit at 40-60% duty cycle to reduce the power consumption. How can I do this without using any microcontroller? Is there any switching IC to do this?
Input voltage to the LED panel is 5 volts.
Every LED has a series resistor. And then they are connected in parallel.
4 LEDs: 3 volts, 20 mA.
EDIT: I don't want to use many components. Something like op-amp ICs; we can just select two resistors based on the gain requirements to amplify the signal.