LM5122-Q1: Clarification of Duty in datasheet

DEP

Part Number: LM5122-Q1
Other Parts Discussed in Thread: LM5122

Greetings,

I'm finding the use of Duty in the data sheet to be confusing and suspect there may be a data sheet error.

D' is defined on page 16 as D'=1-VIN/VOUT

D' is also defined on page 25 and in Note (3) on Page 28 as D'=VIN/VOUT

Other equation then use both D' and D but D is not defined anywhere.

Should Page 16 be D=1-VIN/VOUT and the implied relationship between D and D' be D' = 1-D?

0 Garrett Roecker over 4 years ago

Hi DEP,

Thanks for reaching out with your question and for considering the LM5122 in your design.

In equation 5 the term should be D not D'. The definitions should be as follows

D = 1 - (ViINVOUT)

D' = VIN/VOUT

Thanks,

Garrett

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