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The MEAN WELL PWM-90-24 is a high-performance AC to DC switching LED driver, designed to provide a stable 24V output at 3.75A, delivering a maximum power of 90W. With a wide input voltage range of 90 to 305VAC and a frequency range of 47 to 63Hz, this driver is perfect for various applications while ensuring energy efficiency through its PFC function.
N**O
Highest PWM LED dimming frequency! Stable.
This power supply works GREAT to drive my Warm-to-Dim 24V CV LED strips. The strips need a high frequency PWM to dim them properly along their warm-dim curve without flicker (need at least 1.5kHz PWM which this power supply provides...the highest published PWM frequency output I've found among power supplies on the market so far). I have 6 LED circuits separately dimmed by Lutron 0-10V wireless dimmers which control the MeanWell power supply's PWM dimming output.Only thing I wish for is if the supplies would use a LOGARITHMIC dimming curve instead of LINEAR for the 0-10V dimming control.Dimming gets down pretty close to a few % when coupled with the Lutron module's clean 0-10V control; but MeanWell has hysteresis in the circuit, so they don't dim all the way repeatably below equivalent about 1-volt dimming control input.Generated Heat isn't bad, but the 90W power supplies do warm up (but not burning hot) especially when driving full load LED strip ~83 Watts max.Only issue I've observed so far is at least one of the circuits has an Audible "buzz," hard to say if it's 1.5 kHz PWM frequency or not. That one circuit I did mistakenly run without a load for a while before connecting the LED load (a no-no), so it's hard to say if I caused that noise or if the supply is just noisy. Anyway the cabinet in which the supplies are built-in blocks the noise so I'm not too worried for now unless it gets louder.
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