LM5022: Current required for SYNC pin

Hideki Hayashi1

Part Number: LM5022

Hi team,

Customer use external clock of 1.2MHz for switching frequency.

How much current do they need to apply from clock source? The schematic is same with 7.4.1 of the datasheet.

I think they need to drive the blocking caps, how to calculate it?

Regards,

Hideki

0 Yinsong Cai1 over 4 years ago

Hi Hideki,

I'll talk with the designer of LM5022 and get back to you.

Thanks,

Yinsong

0 Hideki Hayashi1 over 4 years ago in reply to Yinsong Cai1

Hi team,

The frequency of external clock is 270 kHz and Rt is 83 kohm in order to switch with 205kHz.

Would you be able to estimate required current in this case?

0 Yinsong Cai1 over 4 years ago in reply to Hideki Hayashi1

Hi Hideki,

Which case are they going to use? 1.2MHz or 270kHz or both?

Thanks,

Yinsong

0 Hideki Hayashi1 over 4 years ago in reply to Yinsong Cai1

Hi Yinsong,

Sorry. The right value of external clock frequency is 270 kHz. 1.2MHz is my misunderstanding.

Regards,

Hideki

+1 Yinsong Cai1 over 4 years ago in reply to Hideki Hayashi1

Hi Hideki,

OK. Thank you for the confirmation. I'll let you know as soon as I got the feedback.

Thanks,

Yinsong

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