Author Topic: Dimming meanwell led driver  (Read 1125 times)

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Offline daniel444Topic starter

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Dimming meanwell led driver
« on: February 06, 2019, 02:55:55 am »
hi
so ive been building some cob led lamps with Chinese boost drivers and they worked out quite well
now ive upgraded to a meanwell dc to dc boost driver LDH-45 , seems to be the only brand name boost driver on the market
it has a dimming function but it requires voltage or pwm input , not a simple 10k pot that would make for a neat build
i have  bought a tiny module that outputs 0.8v , this activates the dimming but not down to a low enough level , it seems i need 0.25v to get full dimming
i dont know how to get the 0.25v i need
i dont want to use a bulky ebay  pwm module , and the requirements seem to specify a certain type of pwm anyway
any ideas ??
 

Offline daniel444Topic starter

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Re: Dimming meanwell led driver
« Reply #1 on: February 06, 2019, 02:57:00 am »
here is a picture of the lamp i built
 

Online MarkF

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Re: Dimming meanwell led driver
« Reply #2 on: February 06, 2019, 05:02:40 am »
I'm not familiar with these.

But, isn't as simple as adding a pot and resistor???

   
 

Offline daniel444Topic starter

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Re: Dimming meanwell led driver
« Reply #3 on: February 06, 2019, 05:35:31 am »
thanks!
your suggestion  has worked
i didn't realize it was so simple
 

Offline DaJMasta

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Re: Dimming meanwell led driver
« Reply #4 on: February 06, 2019, 05:51:26 am »
They make them to be easy!  If you want digital control instead, you just feed your PWM signal into the relevant terminal.
 

Online MarkF

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Re: Dimming meanwell led driver
« Reply #5 on: February 06, 2019, 05:51:54 am »
Remember you need to select the resistor and pot values to limit the input to 1.2V for Analog DIM pin.
 


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