TLC5947: Max # of multiple devices

Shota Mago

Expert 7080 points

Part Number: TLC5947

Hi team,

My customer considers to use 10pcs of TLC5947.

Figure.23 shows that the device can be connected by daisy chain.

How many devices can be connected and what is factor of the limitation?

I'm looking forward to hearing back from you.

Best regards,

Shota Mago

over 4 years ago

0 Shota Mago over 4 years ago

TI__Expert 7080 points

Hi Hardy,

Thanks for your quick response and answer!

Best regards,

Shoat Mago

0 Hardy Wu over 4 years ago

TI__Genius 12915 points

Hi Shota,

Sorry that I deleted the reply by mistake, so I re-post it again.

In theory the cascade number should be infinite. But due to the limitation of data transmission speed, the display may have synchronous issue between beginning ICs with end ICs, in large amounts applications. It was limited by customer's MCU GPIO speed. I think 10pcs is totally OK.

Power management

Power management forum

TLC5947: Max # of multiple devices