LM5022: How can do calculate Gps value at 10KHz

Eric Chen4

Expert 2370 points

Part Number: LM5022

Hi,

We want to calculate Gps value at 10KHz and spec show ~16dB as below.

But we use simple Excel tool to calculate Gps value but got 2.89 dB value that can't meet spec 16dB.

Would you kindly help to check if we use wrong formula as attached?

Thanks.

Regards,

Eric

184433_LM5022範例計算_Eric.xlsx

over 6 years ago

0 Helen chen over 6 years ago

TI__Mastermind 40080 points

Hi Eric,

I checked u calculation sheet. Found the duty cycle should be 0.6 instead of 0.78. And also in the real application, the effective capacitance actually smaller than 9.4uF, may something around 6-8 uF... Then convert the GPS to 20*log(GPS), we can get around 16DB result. Please check the attached sheet.184433_LM5022 Loop.xlsx

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LM5022: How can do calculate Gps value at 10KHz