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slope compensation in DCM.

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ljy4468

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Hi all
I designed current mode boost converter
and it operates in BCM mode.(Boundary conduction)

And since it is not CCM operation so I think there's no need slope compensation circuit. Isn't it?

But my concern is circuit can operate with CCM mode during start-up...etc..

So in steady-state, slope compensation function is not needed.
But except that, circuit can fall into CCM mode
So Does it need slope compensation functions??
 

For a standard boost converter, slope compensation does not achieve stability in the same way it does for a buck converter, if you are using peak current mode control for your booster (as you would be if you were trying to use slope compensation) then this alone will or should provide sufficient protection for your power switch, presumably you have another voltage control loop around this, and it is the design of this loop that determines stability, a boost converter takes on a whole new dynamic when it enters CCM, and the most stable (or easiest to make stable) form of control is average current mode, with a external voltage control loop. Regards, Orson Cart.
 

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