STEVAL-ISA023V1 STMicroelectronics, STEVAL-ISA023V1 Datasheet - Page 21

• 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
Note:
Equation 3
Where Ip(V
voltage of V
The power point PSTBY where the converter is going into burst mode does not depend on
the input voltage.
The standby frequency F
Equation 4
The ratio between the nominal and standby switching frequencies can be as high as 4,
depending on the Lp value and input voltage.
Figure 20. Standby mode implementation
COMPbl
COMPbl
Minimum
turn on
350ns
P
600ns
ton
P
P
STBY
RST
IN
2
(1V).
) is the peak Power MOSFET current corresponding to a compensation
V
V
COMPsd
COMPoff
3
SWstby
P
STBY
F
SWstby
is given by:
P
3
=
SWstby
1
-- -
2
2
V
F
COMPbl
SWnom
=
P
---------------- -
P
STBY
RST
Ip
1
2
F
V
F
SWnom
SWnom
COMPbl
1
2
Lp
V
COMP
F
SW
Standby mode
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