VIPER53-E STMicroelectronics, VIPER53-E Datasheet - Page 27

• Manufacturer Part Number: VIPER53-E
• Description: Fixed frequency off line converter
• Manufacturer: STMicroelectronics

VIPer53 - E
The lowest load gives another condition for stability: The frequency F
the second order slope generated by the load pole and the integrator part of the error
amplifier. This condition can be met by adjusting the C
Equation 13
The above formula gives a minimum value for C
natural soft start function as this capacitor is charged by the error amplifier current capacity
I
Figure 22. Typical compensation network
COMPhi
With:
P
at start-up.
OUT1
=
V
---------------
R
2
OUT
L1
OSC
C
15V
COMP
TOVL
----------------------------------------------------- -
6.3
VDD
R
L1
Gm
C
OUT
R
2
COMP
10nF
COMP
COMP
. It can be then increased to provide a
P
------------------ -
P
COMP
Rcomp
Ccomp
OUT1
MAX
Transconductance error amplifier
SOURCE
DRAIN
value:
BW1
must not encounter
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