LM25122-Q1: K factor of slope compensation

Takao Yamamoto

Genius 4135 points

Part Number: LM25122-Q1

Dear all,

If we set too large K factor, are there anything problem?

We cannot find the disadvantage with larger K value.

Best regards,

over 8 years ago

0 Youhao Xi over 8 years ago

TI__Guru* 78060 points

This is related to the fundamental slope compensation for switching mode power converters. A too large K factor will push the converter into voltage mode control and you will lose the advantage of the current mode control. Please refer to slope compensation in a power electronics textbook.

0 Takao Yamamoto over 8 years ago in reply to Youhao Xi

Genius 4135 points

Hi Mr.Xi,

Sorry for my poor knowledge.
Could you inform us your recommended textbook? or good web page to understand that?

Besr regards,

0 Youhao Xi over 8 years ago in reply to Takao Yamamoto

TI__Guru* 78060 points

Hi Yamamoto-san,

Sorry I was on an international biz trip and I could only gave you a quick reply in my previous reply. There are a lot of power electronics text books addressing such issue. Instead, the app note at the following TI web link is a good article on this topic.

www.ti.com/.../getliterature.tsp

Best Regards,

Youhao

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LM25122-Q1: K factor of slope compensation