Do these gain and phase Bode plots look right?

[treez]

Hello,
Please find attached the gain and phase Bode plots for a buckboost LED driver.
Vin = 10
Iout= 0.5A
Fsw = 70.4KHz
Constant off time

Please advise,do the Bode plots look right?

 

[mtwieg]

It seems strange that your phase boosts so much above your crossover frequency... is this the response of the entire loop? It would be easier answer if you separately presented the response of the error amp and the response of the converter itself.

 

[treez]

It would be easier answer if you separately presented the response of the error amp and the response of the converter itself.

thankyou, though it won't let me attach excel documents.
One thing is , as per the schematic, I "biased" up the current sense voltage...and for the current sense resistor value, I just used 0.12 Ohms (R1) in the calculation...I wonder if this is right?
Also, since the LT1243 has a 3:1 divider in it, I put in the gain of x 0.33, I wonder if this also is right or wrong?

- - - Updated - - -

Actually , ive shortened the off-time and changed the inductor down to 47uH so that I can make the compensation capacitor , C3, smaller, and still have good gain and phase margin.
Having a large value for C3 makes it start up too slowly, which I don't want, because this is for a flash lamp which flashes on and off 80ms ON, 40ms OFF...etc etc
Here are all the bode plots and the new schematic. (+ corresponding LTspice simulation)

Fsw is 119KHz with the new lower off time of 1.83us.