UCC28740: Output feedback selection

Nhat Dao Quoc

Prodigy 60 points

Part Number: UCC28740

Dear Team,

AC DC supply using UCC28740 two output

Output 1: 24 V/0.5A ( for sensor) use sporadically

Output 2: 12 V/1A ( power supply for IC, MCU, Sensor)

What should I choose Output 1 or Output 2 for Using Optocoupled Feedback is the best in this case

Best Regards

Not Found

over 4 years ago

0 Jaden Ning over 4 years ago

TI__Expert 7080 points

Hello,

Thanks for your interesting in TI's part.

Usually, the feedback is connected to higher output power trail , but in your design the output power is close for two trails. my recommendation is feedback connect to the trail which out regulation requirement is high.

Thanks.

0 Nhat Dao over 4 years ago in reply to Jaden Ning

Prodigy 20 points

Hello,

Thank you for your feedback on my question
I don't know if output 1 for the sensor is isolated. If it's not necessary I can option both outputs.
Best Regards

0 Jaden Ning over 4 years ago in reply to Nhat Dao

TI__Expert 7080 points

Hi Nhat Dao,

Weighted outputs feedback also recommended . see below image 12V and 150V .

0 Nhat Dao over 4 years ago in reply to Jaden Ning

Prodigy 20 points

Hi Jaden Ning,
Thank you for this help.

Power management

Power management forum

UCC28740: Output feedback selection