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STEVAL-ISA112V1
Wide range non-isolated flyback demonstration board, single-output
12 V/4 W based on the VIPER06HN
Data brief
Features
■
Universal input mains range:
– input voltage 90 - 265 VAC
– frequency 45 - 65 Hz
■
Single-output voltage: 12 V at 350 mA
continuous operation
■
Standby mains consumption: < 30 mW at 230
VAC
■
Average efficiency: > 75%
■
Complying with EuP Lot 6 requirements
■
Fully protected against short-circuit
■
Fully protected against overheating
■
Compliant to EMC norm EN55022-Class-B
■
RoHS compliant
STEVAL-ISA112V1
Description
The STEVAL-ISA112V1 demonstration board
implements several forms of protection that
considerably increase end-product safety and
reliability: overload protection, feedback
disconnection, thermal shutdown.
The STEVAL-ISA112V1 demonstration board
implements a 4 W single-output wide range mains
power supply to be used in applications such as
white goods, smaller home appliances, home
automation, LED driver, etc.
The board uses the new VIPER06HN, a new
offline high voltage converter from the VIPerPlus
family by STMicroelectronics. The VIPER06 is
specifically designed for fixed frequency flyback
converters, combining a high-performance low
voltage PWM controller chip and a max. 32 Ω
RDS(on), 800 V BV(DSS), avalanche-rugged
Power MOSFET in the same package.
The application is optimized for less than 30 mW
standby consumption and meets the EPA 2.0
limits, therefore helping to meet the most stringent
energy saving requirements.
January 2013
Doc ID 024120 Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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Contents
STEVAL-ISA112V1
Contents
1
Adapter features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Schematic, bill of material and layout . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1
5
Thermal performances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1
6
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Electrical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
EMI performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Doc ID 024120 Rev 1
STEVAL-ISA112V1
1
Adapter features
Adapter features
The electrical specifications of the demonstration board are listed in Table 1.
Table 1.
STEVAL-ISA112V1 electrical specifications
Parameter
Symbol
Value
VIN
90 VAC - 265 VAC
Output voltage
VOUT
12 V
Max. output current
IOUT
0.35 A
Precision of output regulation
ΔVOUT_LF
± 5%
High frequency output voltage ripple
ΔVOUT_HF
50 mV
Max. ambient operating temperature
TAMB
60 ºC
Input voltage range
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Schematic, bill of material and layout
2
STEVAL-ISA112V1
Schematic, bill of material and layout
The schematic of the board is reported in Figure 1 and the bom in Table 2.
Rf bL2
Rf bL1
Rf bH2
Rf bH1
GROUND
Cf ilt2
7,8
GND
RLIM
Cin1 +
Lin
Cin2 +
CVDD
+
Cf ilt1
Cp
Cc
Rc
LIM
COMP
CONTROL
FB
VDD
J1
DRAIN
VIPER06H
Daux
1
D1
Dz
Cc1
Raux
3
2
4
TR
Cf b
5,6
D2
COUT
+
VOUT
STEVAL-ISA112V1 electrical diagram
12V/350mA
Figure 1.
-
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AC IN
85Vac - 265Vac
AC IN
R0
D0
+
AM11624v1
STEVAL-ISA112V1
Table 2.
Ref.
Schematic, bill of material and layout
Bill of material
Part
Description
Manufacturer
Cin1
3.3 µF, 400 V NHG series electrolytic
capacitor
Cin2
3.3 µF, 400 V NHG series electrolytic
capacitor
CVDD
1 µF, 50 V electrolytic capacitor
Cfilt1
100 nF, 50 V ceramic capacitor
Cc
10 nF, 50 V ceramic capacitor
Cp
1 nF, 50 V ceramic capacitor
Cfb
1 nF, 50 V ceramic capacitor
Cout
330 µF, 16 V ZL series ultra-low ESR
electrolytic capacitor
Rubycon
600 V 1 A diode bridge
Vishay
ST
Ccl
Not mounted
Cfilt2
Not mounted
D0
DF06M
D1
Not mounted
D2
STPS2H100
100 V, 2 A, power Schottky rectifier
Daux
1N4148
Small signal diode
Dz
Not mounted
R0
4.7 Ω 3/4 W resistor
RLIM
15 kΩ 5% 1/4 W resistor
Rc
47 kΩ 5% 1/4 W resistor
RfbH1
33 kΩ 1% 1/4 W resistor
RfbH2
0Ω
RfbL1
12 kΩ 1% 1/4 W resistor
RfbL2
0.47 kΩ 1% 1/4 W resistor
Raux
Not mounted
IC1
VIPer06HN
Offline high-voltage PWM controller
ST
T1
1921.0040
Transformer
Magnetica
Lin
B82144A2105J000
1 mH inductor LBC series
Epcos
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Schematic, bill of material and layout
Figure 2.
STEVAL-ISA112V1
Demonstration board layout
AM11625v1
6/14
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STEVAL-ISA112V1
3
Transformer
Transformer
The transformer characteristics are listed in the table below.
Table 3.
Transformer characteristics
Parameter
Value
Manufacturer
Magnetica
Part number
1921.0040
Primary inductance (pins 3-4)
Leakage inductance
Primary to secondary turn ratio (3 - 4)/(5 - 8)
Primary to auxiliary turn ratio (3 - 4)/(2 - 1)
Test Conditions
1.2 mH ± 15%
Measured at 1 kHz 0.1 V
2.8%
Measured at 10 kHz 0.1 V
6.11 ± 5%
Measured at 10 kHz 0.1 V
5 ± 5%
Measured at 10 kHz 0.1 V
The images below show size and pin distances ([mm]) of the transformer.
Figure 3.
Transformer size and pin diagram
pin distances
Figure 4.
AM11626v1
Doc ID 024120 Rev 1
Transformer size and pin diagram
electrical diagram
AM11627v1
7/14
Measurements
Figure 5.
STEVAL-ISA112V1
Transformer size side view 1
Figure 6.
AM11628v1
4
Measurements
4.1
Electrical performance
Figure 7.
Standby consumption at no load:
IC supplied from the output
(J1 selected)
AM11629v1
Figure 8.
AM11630v1
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Transformer size side view 2
Doc ID 024120 Rev 1
Standby consumption at no load:
IC self-supplied (J1 not selected)
AM11631v1
STEVAL-ISA112V1
Figure 9.
Measurements
Efficiency at different input
voltages: IC supplied from the
output (J1 selected)
Figure 10. Efficiency at different input
voltages: IC self-supplied
(J1 not selected)
AM11632v1
Figure 11. Line regulation at different loads:
IC supplied from the output
(J1 selected)
AM11633v1
Figure 12. Line regulation at different loads: IC
self-supplied (J1 not selected)
AM11634v1
Figure 13. Load regulation at different input
voltages: IC supplied from the
output (J1 selected)
AM11635v1
Figure 14. Load regulation at different input
voltages: IC self-supplied
(J1 not selected)
AM11636v1
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AM11637v1
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Thermal performances
5
STEVAL-ISA112V1
Thermal performances
A thermal analysis of the board has been performed using an IR camera for 85 VAC, 115
VAC, 230 VAC and 265 VAC mains input, full load condition, both with and without the self
supply function. The results are shown in the following figures. When the self-supply
function is used the VIPER06 temperature is higher, due to the power dissipated by the HVstartup generator.
Figure 15. Thermal map at VIN = 85 VAC,
Iout = 350 mA, TAMB = 25 ° C:
IC supplied from the output
(J1 selected)
Figure 16. Thermal map at VIN = 85 VAC,
Iout = 350 mA, TAMB = 25 ° C:
IC self supplied (J1 not selected)
AM11638v1
Figure 17. Thermal map at VIN = 115 VAC,
Iout = 350 mA, TAMB = 25 ° C:
IC supplied from the output
(J1 selected)
AM11639v1
Figure 18. Thermal map at VIN = 115 VAC,
Iout = 350 mA, TAMB = 25 ° C:
IC self supplied (J1 not selected)
AM11640v1
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AM11641v1
STEVAL-ISA112V1
Thermal performances
Figure 19. Thermal map at VIN = 230 VAC,
Iout = 350 mA, TAMB = 25 ° C:
IC supplied from the output
(J1 selected)
Figure 20. Thermal map at VIN = 230 VAC,
Iout = 350 mA, TAMB = 25 ° C:
IC self supplied (J1 not selected)
AM11642v1
Figure 21. Thermal map at VIN = 265 VAC,
Iout = 350 mA, TAMB = 25 ° C:
IC supplied from the output
(J1 selected)
AM11643v1
Figure 22. Thermal map at VIN = 265 VAC,
Iout = 350 mA, TAMB = 25 ° C:
IC self supplied (J1 not selected)
AM11644v1
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AM11645v1
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Thermal performances
5.1
STEVAL-ISA112V1
EMI performance
Figure 23. Average measurements at VIN = 115 Figure 24. Average measurements at VIN = 230
VAC, full load, TAMB = 25 °C;
VAC, full load, TAMB = 25 °C;
IC supplied from the output
IC supplied from the output
AM11646v1
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AM11647v1
STEVAL-ISA112V1
6
Revision history
Revision history
Table 4.
Document revision history
Date
Revision
08-Jan-2013
1
Changes
Initial release.
Doc ID 024120 Rev 1
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STEVAL-ISA112V1
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