STEVAL-ISA023V1 STMicroelectronics, STEVAL-ISA023V1 Datasheet - Page 27

• Manufacturer Part Number: STEVAL-ISA023V1
• Description: EVAL BOARD 24W POS OUT VIPER53E
• Manufacturer: STMicroelectronics
• Series: VIPER™r
• Type: AC/DC Switching Convertersr

Specifications of STEVAL-ISA023V1

• Mfg Application Notes: VIPer53EDIP - AppNote
• Design Resources: STEVAL-ISA023V1 Gerber Files STEVAL-ISA023V1 Schematic STEVAL-ISA023V1 Bill of Materials
• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 3, Isolated
• Power - Output: 25W
• Voltage - Output: 5V, 12V, 3.3V
• Current - Output: 3A, 800mA, 100mA
• Voltage - Input: 90 ~ 265VAC
• Regulator Topology: Flyback
• Frequency - Switching: 60kHz
• Board Type: Fully Populated
• Utilized Ic / Part: VIPer53
• Input Voltage: 90 V to 265 V
• Output Voltage: 3.3 V, 5 V, 12 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: VIPer53-E
• Kit Application Type: Power Management
• Application Sub Type: SMPS
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: VIPer53-E
• Other names: 497-5865

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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