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Greetings!
I need to make color adjusting power LED lamp composed of several COBs. The voltages are up to 50V and current up to 1A for each LED. For the drivers I need two modes of control - current adjustment and separate PWM dimming simultaneously:
Basically it should be able to :
1. adjust the voltage digitally - (may use the commercially available 0-10v or 0-100kohm driver inputs with digital to analog conversion);
2. adjust duty cycle of output (PWM f=>1kHz);
3. both 1. and 2. will be used simultaneously;
4. lamp will be controlled from processor or arduino.
Is there such commercial LED driver with two control signals?
Is there such DC/DC converter kit on ebay?
All I could find were only one way dimming either PWM or 0-10V
Or can I safely add PWM dimmer after commercial constant current (CC) LED driver without messing up the driver?
What PWM frequencies will not blow the driver?
I tried with Meanwell CC LED driver with 0-10V current adjust and external MOSFET as PWM switch dimmer at about 2kHz and the driver made strange disturbing noises.
I need to make color adjusting power LED lamp composed of several COBs. The voltages are up to 50V and current up to 1A for each LED. For the drivers I need two modes of control - current adjustment and separate PWM dimming simultaneously:
Basically it should be able to :
1. adjust the voltage digitally - (may use the commercially available 0-10v or 0-100kohm driver inputs with digital to analog conversion);
2. adjust duty cycle of output (PWM f=>1kHz);
3. both 1. and 2. will be used simultaneously;
4. lamp will be controlled from processor or arduino.
Is there such commercial LED driver with two control signals?
Is there such DC/DC converter kit on ebay?
All I could find were only one way dimming either PWM or 0-10V
Or can I safely add PWM dimmer after commercial constant current (CC) LED driver without messing up the driver?
What PWM frequencies will not blow the driver?
I tried with Meanwell CC LED driver with 0-10V current adjust and external MOSFET as PWM switch dimmer at about 2kHz and the driver made strange disturbing noises.
