TLC5927: Can TLC5927 control the output current correctly when LED anode power supply is turned on during TLC5927 OUTn on state?

Kazuya Nakai59

Guru 20130 points

Part Number: TLC5927

Hello guys,

One of our customers is going to evaluate TLC5927. The customer has some questions as the follows.

Could you please tell me your answer for the customer?

Q1. When LED anode voltage is powered up rapidly after TLC5927 OUTn is turned on, can TLC5927 control OUTn current correctly?

Also then is OUTn current not exceeded 1.5 times or 2times of a constant current determined by Rext?

Q2. Similar question to Q1.

When LED anode voltage is powered up rapidly same timing as TLC5927 OUTn is turned on, can TLC5927 control OUTn current correctly?

Also then is OUTn current not exceeded 1.5 times or 2times of a constant current determined by Rext?

Q3. If Q1 or Q2 answer is the OUTn current exceeds 1.5 or 2 times of a constant current determined by Rext, what is the maximum current?

Your answers would be appreciated.

Best regards,

Kazuya Nakai.

over 6 years ago

0 Kenneth Du over 6 years ago

TI__Genius 14295 points

Hi, Nakai,

Answered offline.

Thanks.

Regards,
Kenenth

0 Kazuya Nakai59 over 6 years ago in reply to Kenneth Du

Guru 20130 points

Hi Keneth,

Thank you for your reply .

By the way, could you tell me how to get your answer?

Thank you and best regards,
Kazuya Nakai.

0 Kenneth Du over 6 years ago in reply to Kazuya Nakai59

TI__Genius 14295 points

Hi, Nakai,

Jason Liu told me he contacted you and talked about this questions through emails.

Thanks.

Regards,
Kenenth

0 Kazuya Nakai59 over 6 years ago in reply to Kenneth Du

Guru 20130 points

Hi Kenenth,

I could understand.

Thank you very much for your support. I will tell the answer from Jason to the customer.

Best regards,
Kazuya Nakai.

Power management

Power management forum

TLC5927: Can TLC5927 control the output current correctly when LED anode power supply is turned on during TLC5927 OUTn on state?