John N. Power wrote:
> > I designing a DC/DC with LM3477. The data sheet specifies
> > that the duty cycle of the PWM output is about D=Vout/Vin
> > which is independent on the output current (see page 13,...
> > If the duty cycle is fixed and independent of the output
> > current, then how is the regulation done when for example
> > the  load increse its current consumption ?
>
> If Vin remains constant under the increased load, then no
> increase is needed in the duty cycle. This will not happen
> in real life; Vin will drop which is why a regulator is needed.
> As Vin decreases, D will need to increase to compensate for
> this, keeping the equation accurate.


Beware of Olin, buddy.
The nonsense you wrote should be "Olinized" severely.

Best wishes,

Mike.

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