Pulse width dimming refers to the stability of the output voltage by changing the on-time of the switching power tube in each cycle at a specific frequency, that is, by adjusting the duty cycle. When the output voltage changes due to factors such as working environment and noise, the error amplifier samples the voltage change and sends the signal to the control circuit. The control circuit adjusts and controls the duty cycle of the switching power tube signal to maintain the stability of the output voltage.
Advantages of led driver PWM dimming method:
(1) The PWM dimming method has high efficiency under heavy load, and has a good dynamic response to load changes.
(2) The output ripple voltage is small and the linearity is high.
(3) The frequency is stable, the duty cycle adjustment is not restricted, the control is simple, and both the current control mode and the voltage control mode are applicable.
Disadvantages of PWM modulation method:
(1) The efficiency of PWM modulation method decreases at light load.
(2) The transient response is slow during constant voltage driving, and a more complicated compensation circuit is required.
(3) Accurate current detection circuit is required for constant current driving.
SMARTS 0-10v dimmable led driver is stable and reliable. It is the first choice for selecting dimmable power supply for LED lights. For more information about 0-10v dimmable led driver, please send your inquiry to steven@smartselectronic.com.cn.
