STEVAL-ISA011V1 STMicroelectronics, STEVAL-ISA011V1 Datasheet - Page 20

• 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

STEVAL-ISA011V1 Board Tests
2.2
2.3
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Temperature Tests
These tests verify the board’s device and component temperatures.
temperatures (the most stress measured, in terms of power dissipation) for the board’s main
components.
Note: The tests were performed at 25°C (ambient temperature), in Full Load conditions.
Table 3.
Dynamic Load Regulation Tests
These tests monitor and verify the stability and quality of the system response to load
changes, in terms of speed and overshoot.
Figure 11
load changes, for the minimum (88V
and 230V
During these tests, load changes from a minimum of 180mA to a maximum of 900mA are
applied to the circuit as squarewaves, with 3ms periods and a duty cycle of 50%.
V
INAC
The output voltage (Ch3) has a variation of some tenths of a mV (about 40mV), with
some mV overshoots. These results indicate very good dynamic behavior on the part of
the system.
The VIPer12A feedback pin voltage (Ch1) in
input voltage is 265V
feedback pin voltages show some oscillation. This oscillation is not related to a low
phase margin of the Loop Gain, but is related to the VIPer12A Burst mode operation.
Note: Even with the oscillation, the output voltages are still regulated well.
115V
230V
265V
88V
(V
, and
AC
RMS
).
Component Critical Temperature Measurements
)
Figure 12 on page 22
VIPer12A
38
39
42
45
AC
, the load is 180mV (its minimum value) while the output and
AC
Transformer
show the waveforms as they occur during the circuit
Rev. 1
), maximum (265V
37
36
38
35
Figure 9
Figure 10 on page 21
Clamp Resistor
, and
AC
Figure 10 on page 21
36
37
38
39
), and nominal voltages (115V
AN2272 - Application Note
Table 3
Output Diode
shows that when the
45
45
45
45
shows critical
, and
Units
°C
°C
°C
°C
AC