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Rik van Mazyk

Hello, I'm hoping to get some advice on a small package LED Driver which can provide drive to 1-4 LEDs. The LEDs are small 3020 package with 3.3V 100ma power requirement. The input voltage will be from a USB connection so 2.7-5.5V with 750mA. I also need the ability to dim the LEDs with a DC control voltage not with PWM.

over 3 years ago

0 Mason Wang over 3 years ago

TI__Genius 9630 points

hi Rik

First of all, from your input and output voltage values, it could either boost voltage or buck voltage? Can you help confirm first as single channel device only support boost or buck topology?

0 Rik van Mazyk over 3 years ago in reply to Mason Wang

Prodigy 20 points

Hello,

The power source will most likely be a usb power pack so will have an output of 5V. I guess it will need to be a multichannel output device so each LED is individually turned on and off so the convertor would need to be a buck to go from 5V to the 3.3V.

0 Mason Wang over 3 years ago in reply to Rik van Mazyk

TI__Genius 9630 points

hello

Let me get a better understanding on this. As you mentioned, a buck to go from 5V to 3.3V is needed, then how many LEDs are in series? I get another requirement that LEDs in series should be individually controlled on or off. I will further check this

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