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. 1/14 www.st.com 14 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 2/14 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 Doc ID 024120 Rev 1 3/14 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. - 4/14 Doc ID 024120 Rev 1 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 Doc ID 024120 Rev 1 5/14 Schematic, bill of material and layout Figure 2. STEVAL-ISA112V1 Demonstration board layout AM11625v1 6/14 Doc ID 024120 Rev 1 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 8/14 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 Doc ID 024120 Rev 1 AM11637v1 9/14 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 10/14 Doc ID 024120 Rev 1 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 Doc ID 024120 Rev 1 AM11645v1 11/14 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 12/14 Doc ID 024120 Rev 1 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 13/14 STEVAL-ISA112V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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