DROK 600W 12A Dc Boost Voltage Converter Modification help

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Mike Hunter
May 21, 2019 at 5:05 pm

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#35921 Reply |

I need to use the CC control on a ‘Model 090089’ Boost converter as a wall dimmer for some LED lighting. I need to set a fixed current limit to prevent the user from over driving the LED array.

The LEDs should get about 32V at a current of 0 – 3 amps. I can just move the CC potentiometer off the board but this allows WAY more current to be delivered than what I can use.

Can you make a recommendation for the circuit modification? Can you provide a schematic of the feedback circuit so that I might figure it out myself?

Thanks in advance!

Mike

Drok
Keymaster

May 22, 2019 at 8:07 am

Post count: 2971

#35923 Reply |

Hello Mike Hunter,

Did you remove the CC potentiometer? You can just set the output current as 3 amps. The output current will not be over 3 amps in that case. That should not have influence on your application.

As we don’t get schematic from factory, we are sorry we are unable to show it. Hope you can understand.

Any more questions, please kindly let us know.

Best regards.

Mike Hunter
May 22, 2019 at 1:09 pm

Post count: 0

#35925 Reply |

Hi Drok,

I got it! My concept was correct, I just wired it wrong.

Set the current limit with the onboard CC potentiometer, attach pins 1 and 2 of an 18k ohm potentiometer to pins 1 and 2 of the CC potentiometer and all is good.

I now have remote dimming from 0.1A up to 3.0A for a custom LED lighting array.

Best regards,

Mike
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