ebaketa
Newbie level 4
Hello everyone, if someone is willing to help and know, please.
So this is a boost converter, I control it Arduino, I speeded up Arduino PWM at 62kHz and ok when it raises voltage from 5V to 12V, I connect a car light, 12V / 21W, that my converter pushes around 11.8V and 1.7A, the flare glows super.
So then I try with a smaller input voltage of 3.3V and can not get more than 300mA.
Now my question is whether anybody knows how to choose a coil, how much inductance is needed, whether inductance depends on PWM frequency, I think it goes this way but I'm not sure, the higher the frequency to the lower inductance.
If someone has experience or knows, please help!
So this is a boost converter, I control it Arduino, I speeded up Arduino PWM at 62kHz and ok when it raises voltage from 5V to 12V, I connect a car light, 12V / 21W, that my converter pushes around 11.8V and 1.7A, the flare glows super.
So then I try with a smaller input voltage of 3.3V and can not get more than 300mA.
Now my question is whether anybody knows how to choose a coil, how much inductance is needed, whether inductance depends on PWM frequency, I think it goes this way but I'm not sure, the higher the frequency to the lower inductance.
If someone has experience or knows, please help!