UCC28089: Equation in datasheet P.7

HIRO

Prodigy 80 points

Part Number: UCC28089

Hi All

My customer is evaluating UCC28089 on their PCB.
But there is a big difference in evaluation result and calculation.

Customer would like to check if the equation in datasheet P.7 is correct or not.
Could you give me any advice ?

Best regards,
HIRO

over 7 years ago

0 John Griffin1 over 7 years ago

TI__Mastermind 34465 points

Hello Hiro,

Attached are the equations in page 7 of the data sheet.

Can you provide details as to which equation you have an issue with ?

Regards

John

0 HIRO over 7 years ago in reply to John Griffin1

Prodigy 80 points

Hi John

Thank you for reply and sorry for lack of information.
It's 2ND ORDER EQUATIONS.

Best regards,
HIRO

0 John Griffin1 over 7 years ago in reply to HIRO

TI__Mastermind 34465 points

Hi Hero,
Please make sure the correct units were used.
RA and RB are in Ohms and CT is in Farads.
Results are in Hz and seconds.
This is confusing since the table is in kOhms and pF

Let me know if this works or if a problem still occurs.
Regards
John

0 John Griffin1 over 7 years ago in reply to John Griffin1

TI__Mastermind 34465 points

Hi Hero,
Since you have not responded to this post in over one week I will mark it as closed.
Please open a new post if you have further questions
Regards
John

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UCC28089: Equation in datasheet P.7