UCC2837: Could you tell me about UCC2837 ?

Pokkun

Genius 4695 points

Part Number: UCC2837

Hi team.

My customers are considering using UCC2837 and received the following inquiries.

Will you teach me?

＜Question＞

What is the switching frequency of the charge pump circuit built into UCC2837?

※Please tell us the typical value first.

※If be able to tell, please tell me the min / max value as well.

Best regards,

Masumi Sekiguchi.

over 7 years ago

0 Mark Sellers over 7 years ago

TI__Expert 6835 points

Hi Masumi-san,

As this is an old part it will take us some time to get the data. Please allow me 1 to 2 weeks to get this data for you. Also, we will only be able to provide typical data for you.

Best Regards,
Mark

0 Pokkun over 7 years ago in reply to Mark Sellers

Genius 4695 points

Thank you for contacting, Mark-san.

1. Well then can you offer typical data?
2. And while verifing this data with the customer, could you be collecting the whole data(It takes 1 to 2 weeks, so it is OK)?

Best Regards,
Masumi Sekiguchi

0 Mark Sellers over 7 years ago in reply to Pokkun

TI__Expert 6835 points

Hi Sekiguchi-san,

The frequency of the charge pump is typically 450 kHz. Hope this helps you.

Best Regards,
Mark

0 Pokkun over 7 years ago in reply to Mark Sellers

Genius 4695 points

Thank you very much for the answer.
I'll answer to at 450kHz.

Actually, my customers are suffering from noise of 15~30kHz, so he have asked me this question.

I think that this IC is unrelated if it is 450 kHz,
Doesn't you know that case of there is reason 15~30kHz?

0 Mark Sellers over 7 years ago in reply to Pokkun

TI__Expert 6835 points

Hi Masumi,

Here is a noise plot from the CAP pin, you can see there is a small spur at 30kHz, but the main spurs are at 450kHz.

Regards,

Mark

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UCC2837: Could you tell me about UCC2837 ?