LM3643: Dimming LEDs

Ambroise Suter

Part Number: LM3643

Hello,

What would be the simplest solution to gradually dim an LED when switching from one LED to the other one?
Can you provide code for the essential function?
I would assume a for-loop with Torch Brightness Register (0x05) / (0x06) could do the job?

Thank you and best regards,

Ambroise

over 4 years ago

0 Sean Zhou over 4 years ago

TI__Mastermind 22745 points

Hi Ambroise,

I'm a little puzzled about your description, could you draw a waveform for what you want to achieve? Then I can help with you.

Sean

0 Ambroise Suter over 4 years ago in reply to Sean Zhou

TI__Expert 3940 points

Hi Sean,

Here a picture to clarify our application. Let me know if you have any other questions.

BR Ambroise

0 Sean Zhou over 4 years ago in reply to Ambroise Suter

TI__Mastermind 22745 points

Hi Ambroise,

There are no direct regs to achieve this function, but you can achieve this function with changing of reg0x05 and reg0x06. It means you can decrease reg0x05 value and increase reg0x06

Sean

0 Ambroise Suter over 4 years ago in reply to Sean Zhou

TI__Expert 3940 points

Hi Sean,
That sounds like a good solution. Do we have some sort of pseudo-code for this function?

BR Ambroise

0 Sean Zhou over 4 years ago in reply to Ambroise Suter

TI__Mastermind 22745 points

Hi Ambroise,

I'm sorry that we don't have such kind of reference code, but it is very simple, you just need to change the reg0x05 and 0x06.

Sean

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LM3643: Dimming LEDs