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Boost converter transfer function

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Fluorescence

Electrical
Oct 19, 2008
42
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

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
97uo0z.jpg


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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