TLC59116-Q1: Question regarding output management when severals are connected to one LED Cathod

Baptiste CHERDLE

Intellectual 300 points

Part Number: TLC59116-Q1
Other Parts Discussed in Thread: TLC59116,

Hi Team,

I currently use the TLC59116 for RGB management and I want to use it to manage one power LED (white or IR).

I see in the TLC59116-Q1 datasheet (page 31) that it is possible to use several outputs for one LED.

Regarding the power LED, I want to power it at 250mA by using 5 outputs with 50mA max for each.

For I²C management, do I have to set the 5 outputs at the same value (between 0 and 255) or can I set them with different value (i.e.: out0 = 255; out1 =60; out2 = 0 ...)? It is important for me because it is linked to LED current step.

If you need additional datas, don't hesitate,

Thanks in advance for your feedback

Baptiste,

over 6 years ago

0 Kenneth Du over 6 years ago

TI__Genius 14295 points

Hi, Baptiste,

We've assigned the correct engineer to take a look at this and will reply you soon.

Thanks.
Regards,
Kenneth

0 Kenneth Du over 6 years ago

TI__Genius 14295 points

Hi, Baptiste,

I got the answer for you.

If you want to use 5 outputs together, you need to send the same value for each channel.

Please help to click "Resolve" if the problem is solved.

Thanks.
Regards,
Kenneth

0 Baptiste CHERDLE over 6 years ago in reply to Kenneth Du

Intellectual 300 points

Hi Kenneth,

Thanks for your feedback, yes it solves my question.

So that means that we can only have a 255 bits resolution for the global current. So for a design with 5 output at 50mA, it seems that I have a 1mA resolution, which can be not enough..

Thanks

Baptiste

Power management

Power management forum

TLC59116-Q1: Question regarding output management when severals are connected to one LED Cathod