if you look at the basics, the vout ~ Vin*(ton/(ton+toff)) thats a rough value as you have inductance and capacitance involved too. ----- Original Message ----- From: "John Ward" To: Sent: Monday, September 01, 2003 11:25 AM Subject: Re: How does a PWM DC/DC regulates its output ? > the pulse width is pretty much used to regulate the output. > if you vary the output current without varying the pulse width, you will get > voltage drop ? > ----- Original Message ----- > From: "Tal" > To: > Sent: Monday, September 01, 2003 2:19 AM > Subject: [EE]: How does a PWM DC/DC regulates its output ? > > > > Hello, > > > > 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, > > http://www.microchip.com/1010/suppdoc/appnote/all/picref2/index.htm). > > > > 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 ? > > > > Thanks, > > > > Tal > > > > -- > > http://www.piclist.com hint: The list server can filter out subtopics > > (like ads or off topics) for you. See http://www.piclist.com/#topics > > > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.