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

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