UCC28220: UCC28220 Startup sequence

Wei-Hao Chen (TW-FAE)

Expert 3260 points

Part Number: UCC28220

Hi team,

My customer wishes to know when the UCC28220 is powered up, which of the OUT1 or OUT2 channel will activate first?

Thanks.

Best Regards,

Wei-Hao

over 7 years ago

0 Peter Meaney over 7 years ago

TI__Mastermind 31580 points

Hi Wei-Hao,

There is no way to determine which order OUT1 and OUT 2 will activate during start-up.

Regards

Peter

0 Wei-Hao Chen (TW-FAE) over 7 years ago in reply to Peter Meaney

TI__Expert 3260 points

Hi Peter,

Thanks for your reply and comment, so there is no internal logic to control which channel will activate first?

Cheers.

Best Regards,
Wei-Hao

0 Peter Meaney over 7 years ago in reply to Wei-Hao Chen (TW-FAE)

TI__Mastermind 31580 points

Hi Wei-Hao

Looking at the block diagram the PWM CLK1 and CLK2 are generated from Q and QBar of a flip flop. There is no way to determine which output of the flip flop will be high on start-up.

Why is the order of OUT1 and OUT2 important to the customer?

Regards

Peter

0 Peter Meaney over 7 years ago in reply to Peter Meaney

TI__Mastermind 31580 points

Hi Wei-Hao,

I hoped I answered your question. I am closing this post since there has be no reply to my question.

Regards

Peter

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UCC28220: UCC28220 Startup sequence