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TIDA-03027: Stepdown voltage from 3.3V to 2~2.6V: resistor vs linear regulator and connect 110/120V to power

Aquiel Godeau
Prodigy 90 points

Part Number: TIDA-03027

Hi, 

 I am currently making plans to work with the TIDA-03027 reference design as the power adapter design for my project. I just had a couple of questions.

1) I need to step down the 3.3V rail down to the voltage range of 2~2.6V for an LED strip. It was suggested to me to use an additional resistor or a positive three terminal linear voltage regulator. I just wanted to know which one is better to use. I just want nice clean power delivery and low cost.

2) How would I be able to connect external 110V/120V to power the device?

Thanks! 

  • 0
    TI__Expert 6430 points
    Hi Aquiel,

    You can use a resistance if the no of LEDs are fixed, but if you number of LEDs are going to vary then I would suggest you to use external regulator.

    Please also note that you shouldn't connect too many LEDs as it might overlaod the 3.3V regulator which can cause unpridictable behaviour.

    You need to use a USB PD adaptor to power it up from the 110/220V wall socket.

    Please click "This resolves my issue" if this post answer's your query.

    Thanks,
    Rahul