4 ms·
Why do they use PWM instead of simply passing less current?
by Sohcahtoa82 2y ago
Why do they use PWM instead of simply passing less current?
- aidenn0 2y agoCost. A PWM needs only one external component (a MOSFET), while a current regulator needs multiple.
- Sohcahtoa82 2y agoI admit my knowledge on electronics is pretty basic, but to reduce current, don't you just need a resistor?
- aidenn0 2y agoSo a diode is a constant-voltage device. If you put a resistor in series and run a line voltage above the diode's voltage than the current will be limited by ohms law. But, variable resistors that are rated for a lot of power (roughly half the power of the diodes at max brightness) will add to the BOM.