12/23

AN1317 - APPLICATION NOTE

, with

A wide range input voltage design, fitting both American and European standards, is considered: The

value, with a voltage of 400 V to cover the whole range.

3.6 Compensation Network

The R2 and C4 network connected on the COMP pin of the VIPer20 insures a correct stability of the

converter. Note that both Buck and inverter topologies are working in discontinuous, and have a very

similar dynamic behavior. So, the values indicated on the schematics are convenient for both topologies

and in all load conditions.

V

in low

V

inp eak

2

π

t

2

T

s

-----





sin

⋅

t

2

T

s

2

π

------ arc

V

inlow

V

i npeak

------------------

sin

T

s

+

⋅

=

⇒

=

C

1

2

t

2

t

1

–

() P

out

1

η

---

⋅⋅

V

2

in peak

V

2

low

–

()

-----------------------------------------------

⋅

=

t

1

T

s

4

-----

=

Ts

t

Figure 8: Single wave filtering