L6563 - L6563A

Application information

23/37

to set the output voltage at the desired values use the following design procedure:

1.

Equation 6

2.

Determine the divider ratio of the MULT pin (pin 3) bias:

Equation 7

0.65V.

3.

Determine R1, the upper resistor of the output divider:

Equation 8

4.

Equation 9

Vin

clamp

Vox

Vo

1

–

Vo

2

Vo

1

–

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

Vin

2

Vox

Vo

2

–

Vo

2

Vo

1

–

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

Vin

1

⋅

–

⋅

=

k

3

2Vin

x

⋅

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

=

R1

Vo

∆

20

-----------

10

6

⋅

=

R2

2.5

R1

Vin

2

Vin

1

–

Vo

1

2.5

–

() Vin

2

Vo

2

2.5

–

() Vin

1

⋅

–

⋅

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

⋅

⋅

=

R

T

2kR1

Vin

2

Vin

1

–

Vo

2

Vo

1

–

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

⋅⋅

⋅

=