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AN1317 - APPLICATION NOTE

Figure 6: Switching diagram in normal operation (discontinuous mode)

for the Inverter:

In practice, with a less than 10% error, the VIPer20 consumption and also the power transferred to the

the calculation becomes the same for both topologies:

The power delivered by these topologies is limited by the minimum VIPer20 current capability and by the

fact that continuous mode has to be avoided. The maximum output current is therefore about

.

It gives also a maximum inductance value, for a given frequency:

On fig. 9 and 11 of section 4, a 2 W typical output power can be obtained with an inductor value of

P

out

1

2

---L

1

⋅

out

–

⋅⋅

=

L

1

2

P

out

I

DD

V

⋅

out

+

⋅

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

⋅

=

L

1

2

P

out

⋅

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

⋅

≈

I

Dli m

2

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

L

1max

V

ou t

I

Dlim

F

s

⋅

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

≈

Charge

Discharge

t