gungor
Newbie level 2
Hi All,
I have a 5V input. I need a circuit to drive 40 LEDs connected in parallel. Maximum current will be 800 mA (20 mA/LED). LEDs will open at 2.4 V and maximum brightness is at 5V. It is needed to control brightness in maximum 32 steps.
So I need a converter with a 5V input, having output variable between 2.4 to 5V in maximum 32 steps.
I have thought of:
Putting a mosfet between 5V and anode of leds and driving gate by pwm.
My question is:
Is this a feasible approach? What are the critical things for this implementation?
Do you have other suggestions?
Thanks in advance.
Regards, Gungor
I have a 5V input. I need a circuit to drive 40 LEDs connected in parallel. Maximum current will be 800 mA (20 mA/LED). LEDs will open at 2.4 V and maximum brightness is at 5V. It is needed to control brightness in maximum 32 steps.
So I need a converter with a 5V input, having output variable between 2.4 to 5V in maximum 32 steps.
I have thought of:
Putting a mosfet between 5V and anode of leds and driving gate by pwm.
My question is:
Is this a feasible approach? What are the critical things for this implementation?
Do you have other suggestions?
Thanks in advance.
Regards, Gungor