buck-boost AC-DC convertion

carlo · ‎2014-02-24

Posted on February 24, 2014 at 15:45

Good morning,

we are looking for an configuration for our application LED driver.

We are taking a look among your AN, for L6562 designing in buck-boost config.

In the AN3111, at pg8, there is a not clear equation (equation 9). Wich is the value of Vpk? If Vpk is the value of the peak of Vin, the result of the equation 9...=108 is not clear.

For more details, read the files in attached.

Thank you for attention,

best regards,

Eng.C.Ammatuna.

#buck-boost-ac-dc

ramator · ‎2014-02-24

Posted on February 25, 2014 at 03:01

Good afternoon,

Your assumption is wrong.

You can see other open source

http://en.wikipedia.org/wiki/Form_factor_(electronics)

You can calculate Vave in the other way:

Vin

=120

VAC

Vpk

=1.4142

Vin

=169.7

VDC

Vave=0.637Vpk=108.1 VDC

Where you see a mistake?

Good luck!