STEVAL-ISA011V1 STMicroelectronics, STEVAL-ISA011V1 Datasheet - Page 15

• Manufacturer Part Number: STEVAL-ISA011V1
• Description: BOARD EVAL VIPER12A LP AC/DC
• Manufacturer: STMicroelectronics
• Series: VIPER™r
• Type: AC/DC Switching Convertersr

Specifications of STEVAL-ISA011V1

• Design Resources: STEVAL-ISA011V1 Gerber Files STEVAL-ISA011V1 Schematic STEVAL-ISA011V1 Bill of Materials
• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 4.1W
• Voltage - Output: 4.5V
• Current - Output: 900mA
• Voltage - Input: 88 ~ 265VAC
• Regulator Topology: Flyback
• Frequency - Switching: 60kHz
• Board Type: Fully Populated
• Utilized Ic / Part: VIPer12A
• Input Voltage: 88 V to 265 V
• Output Voltage: 4.5 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: VIPER12ADIP-E
• Kit Application Type: Power Management - Voltage Regulator
• Application Sub Type: AC / DC Adapter
• Kit Contents: Board
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: VIPer12A
• Other names: 497-6413; STEVAL-ISA011V1

AN2272 - Application Note
2
2.1
STEVAL-ISA011V1 Board Tests
The tests performed with the STEVAL-ISA011V1 demo board are used to evaluate the
converter behavior in terms of:
Start-up Tests
The diagnostic board will handle a wide range of AC input voltage (88V
its maximum output power is 4.1W with one output of 4.5V. Its maximum output current is
900mA (see
For flyback converters, the most critical conditions for the main switch in terms of Maximum
Drain Current and of Maximum Drain Voltage (when no abnormal event occurs), are those
that exist during the start-up phase. The maximum values for drain voltage and current are
measured in both full load and no load conditions (the two extreme points in terms of load),
and for minimum, maximum, and nominal input voltages (see
All the measured values are within the rated maximum values of the VIPer12A so they are
not critical for device operation.
Table 1.
Table 2.
V
V
Symbol
V
INAC
AC(max)
efficiency,
safe operating area of the devices,
line regulation, and
load regulation.
AC(min)
V
230
115
I
V
O
O
115
230
265
O
88
(V
RMS
Electrical Characteristics
Start up Measures
Table 1
)
Maximum AC Input Voltage
Minimum AC Input Voltage
Output Voltage
Maximum Output Voltage Ripple
Maximum Output Current
Efficiency (at full Load and 230V
Efficiency (at full Load and 115V
).
Full load
352
393
581
638
V
Description
DRAIN(max)
Rev. 1
(V)
No load
353
401
581
633
AC
AC
)
)
STEVAL-ISA011V1 Board Tests
Full load
Limits or Value
0.460
0.472
0.507
0.515
Table
265V
88V
I
DRAIN(max)
300
900
4.5
70
70
RMS
).
RMS
AC
to 265V
(mA)
No load
0.458
0.470
0.505
0.515
AC
Units
mV
mV
), and
%
%
V
V
V
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