LM5156HEVM-FLY: Technical Support

Balaji B

Right now I'd planned to procure this development board for my application. I'm planning to change the diodes and transformers in such a way that it can produce 28V output and power rating of 33W. If I'm facing any issues can i get any assistance or support from TI

1 month ago

0 Feng Ji 1 month ago

TI__Mastermind 27920 points

Hi Balaji,

Please start from LM5155/56 Flyback Controller Quick Start Calculator.

I think you need to change the transformer,diode, feedback and compensation.

Best Regards,
Feng

0 Balaji B 29 days ago in reply to Feng Ji

Prodigy 30 points

I need to access EN, UVLO and SYNC independently. But after seeing the datasheet, either UVLO/EN or SYNC option only configurable. Is it so or can we access all three functions independently.

0 Brigitte 29 days ago in reply to Balaji B

TI__Guru 71965 points

Hello Balaji,

What do you mean with accessing these functions independently? UVLO/EN is the pin that allows to enable the device and at the same time set a certain voltage as UVLO level. So you can enable the device there and set a UVLO voltage.

Best regards,
Brigitte

0 Balaji B 28 days ago in reply to Brigitte

Prodigy 30 points

Yes if I'm enabling the IC by EN Pin. Now If I Want to sync with external frequency how can i sync without any change in EN/UVLO function of that pin

+1 Moritz 27 days ago in reply to Balaji B

TI__Mastermind 24385 points

Hi Balaji,

please check the datasheet from chapter 9.3.6 Clock Synchronization (UVLO/SYNC/EN Pin) ongoing.

Best regards

Moritz

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LM5156HEVM-FLY: Technical Support