How many kinds of leds are there? What principle? What to do,
Constant current power control: the size of the current can be adjusted easily with analog linear technology. Group control: group an LED group with a simple packet control.
Thyristor dimmer: use the thyristor dimmer and adjust the input voltage of the input LED power module to achieve the adjustment purpose. The principle of LED dimmers: Pulse Width Modulation (PWM) : digitizing the power source and controlling the air ratio of the square wave to achieve the goal of controlling the current.
The PWM signal produced by other IC, by adjusting the pulse width of the dimming PWM signal to control the dimming control of the power chip pins dimming voltage to achieve, such as remote control;
Linear dimming: power chips have a dimming control pin, adjustable resistance to the ground, adjust the resistance value of the potentiometer, change the voltage of dimming control pin, make the output of the PWM control chip to drive the MOS PWM pulse width is changed to adjust the current of the LED, get the dimming effect, such as lamp;
