Why Is My LED Driver Buzzing? (And How to Fix It)
- 2026-09-22 11:58
- /
- Arraystar LED
Driver buzzing is usually from PWM dimming at audible frequencies (100-200Hz). Fix: use a higher-frequency dimmable driver (20kHz+).
Why Drivers Buzz
LED drivers use PWM (pulse width modulation) to dim. Cheap drivers PWM at 100-200Hz, which is audible. Quality drivers PWM at 20kHz+, which is inaudible.
Buzzing can also come from loose components vibrating at line frequency (100-120Hz). This is a manufacturing defect.
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Frequently Asked Questions
Is a buzzing LED driver dangerous?
Usually not. It is annoying but not a fire risk. Replace it for quiet operation.
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