DocID17928 Rev 6

11/30

ST1S40

Functional description

30

Figure 5. Small signal model for the error amplifier

system stability and can be neglected.

Equation 8

Equation 9

Equation 10

whereas the zero is defined as:

Equation 11

considered as negligible. The error amplifier output resistance is 240 M

singularities are:

Equation 12

G



G

EA0

1s

+

R

c

C

c







s

2

R

0

C

0

C

p

+

 R

c

C

c

sR

0

C

c



R

0

C

0

C

p

+

 R

c

C

c



+



+

 1

+



+







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

=

f

P LF

1

2

 R

0

C

c





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

=

f

P HF

1

2

 R

c

C

0

C

p

+







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

=

f

Z

1

2

 R

c

C

c





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

=

f

Z

11 6 kHz



=

f

P LF

34 Hz



=