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Boost converter transfer function

Boost converter transfer function

Boost converter transfer function

(OP)
Hello,

I have designed a boost converter with the following specification

Vin = 24V
Vout = 40V
Output power  = 10W
Switching frequency = 100KHz
Continuous conduction mode
Output caps = 400uF
Output caps ESR = 0.33R
Boost inductor = 1mH
Ripple current = 10%
PWM controller = LT1241
Current mode
Current sense resistor = 1R8

***LT1241 Datasheet
http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1142,C1137,P1335,D1328

In order to do frequency compensation, I got the equation for a boost control_to_output transfer function on page 230 of Basso's book
There are actually two equations given. (2A-14  and 2A-16)

-However, the two equations for control_to_output give different bode plots.

Here are the bode plots

*****BODE PLOTS of control¬_to_output for boost converter
[IMG]http://i42.tinypic.com/97uo0z.jpg[/IMG]

Which plots do you think are correct?
Is it those on the right or those on the left?

Thankyou for reading
 

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