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Yes, COB LED light sources can be dimmed. Dimming refers to controlling the intensity of light by changing the brightness or output current of the light source.
There are several main methods for dimming COB light sources:
1. PWM dimming: Using pulse width modulation (PWM) technology, the brightness of the LED chip is controlled by changing the time ratio of the high level and low level of the signal. This is a common digital dimming method widely used in LED lighting systems. 2.
Current dimming: The brightness of the light source is adjusted by changing the input current of the LED chip. The dimming effect of COB light sources can be achieved by adjusting the size of the driving current. This dimming method is more common in some application scenarios. 3.
Dimming module: Use a dedicated dimming module connected to the COB light source to control the brightness of the light source by adjusting the output signal or voltage of the module. This method is often used in situations where precise adjustable brightness is required.
It should be noted that the specific dimming method depends on the design of the COB light source and the selected drive circuit. When dimming the COB light source, it is necessary to follow the relevant operating instructions and safety specifications to ensure correct dimming and ensure the normal operation and life of the light source.
The reasons for the problems of COB LED dimming light source may be unstable power supply voltage, large or small current, LED chip damage, control circuit failure, etc. Methods to solve the problems of COB LED dimming light source:
1. Check whether the power supply voltage is stable. If it is unstable, take measures to stabilize the power supply voltage.
2. Check whether the current is too large or too small. If so, take measures to adjust the current.
3. Check whether the LED chip is damaged. If so, replace it with a new LED chip.
4. Check whether the control circuit is faulty. If so, replace it with a new control circuit.