STEVAL-ISA111V1

STEVAL-ISA111V1 Wide-range single-output demonstration board based on the VIPER26HN Data brief Features ■ Universal input mains range: – input voltage 90 - 264 VAC – frequency 45 - 65 Hz ■ Single-output voltage: 12 V at 1 A continuous operation ■ Standby mains consumption: < 30 mW at 230 VAC ■ Average efficiency: > 80% ■ Fully protected against faults (overload, feedback disconnection and overheating) ■ EMI: according to EN55022-Class-B ■ RoHS compliant STEVAL-ISA111V1 Description The STEVAL-ISA111V1 demonstration board is a 12 V, 1 A power supply set in non-isolated flyback topology using the VIPER26HN, the new offline high voltage converter by STMicroelectronics. The features include an 800 V avalanche rugged power section, PWM operation at 115 kHz with frequency jittering for lower EMI, current limiting with adjustable set point, onboard soft-start, a safe auto-restart after a fault condition and a low standby power. The protections include thermal shutdown with hysteresis, delayed overload protection, and open loop failure protection. December 2012 Doc ID 023970 Rev 1 For further information contact your local STMicroelectronics sales office. 1/9 www.st.com 9 Adapter features STEVAL-ISA111V1 1 Adapter features Table 1. Electrical specifications Symbol VIN 2/9 Parameter Value [ 90 VAC - 265 VAC] Input voltage range VOUT Output voltage 12 V IOUT Max. output current 1A ΔVOUT_LF Precision of output regulation ± 5% ΔVOUT_HF High frequency output voltage ripple 50 mV TAMB Max. ambient operating temperature 60 oC Doc ID 023970 Rev 1 STEVAL-ISA111V1 Circuit description 3 R5 LIM CONTROL COMP R7 R4b R4a C6 AC IN R3 F NTC C4 + t C5 - C7 D0 C8 + FB C1 VDD + L2 C2 + DRAIN GND D4 D1 1 3 5 T2 VIPER26 D6 8,9 6,7 D3 C10 + C11 + VOUT GROUND Application schematic - simplified for VOUT ≥ 12 V Figure 1. AC IN 2 Circuit description AM11548v1 Doc ID 023970 Rev 1 3/9 Circuit description Table 2. 4/9 STEVAL-ISA111V1 Bill of material Reference Part NTC 2.2 NTC F T2A 250 V Description Thermistor, S236 series Manufacturer Epcos 2 A, 250 Vac fuse, TR5 series Wickmann C1 10 μF, 400 V NHG series electrolytic capacitor Panasonic C2 22 μF, 35 V SMG series electrolytic capacitor Panasonic C4 2.2 μF, 63 V electrolytic capacitor C5, C7 100 nF, 50 V ceramic capacitor C6 2.2 nF, 50 V ceramic capacitor C8 2.2 nF, 50 V ceramic capacitor C10 1000 F, 16 V ultra low ESR electrolytic capacitor ZL series Rubycon C11 680 F, 16 V ultra low ESR electrolytic capacitor ZL series Rubycon D0 DF06M 1 A - 600 V diode bridge D1 STTH1L06 1 A - 600 V ultrafast diode ST D3 STPS3150 3 A - 150 V power Schottky (output diode) ST D4 1.5KE300A Transil ST D6 1N4148 Small signal diode R3 47 k 1% 1/4 W resistor R4a 15 k 1% 1/4 W resistor R4b 2.7 k 1% 1/4 W resistor R5 27 k 1/4 W resistor R7 33 k 1/4 W resistor L2 RFB0807-102 T2 1335.0089 IC1 VIPER26HN Input filter inductor (L = 1 mH, ISAT = 0.3 A; DCRmax = 3.4 Ω) 115 Hz switch mode transformer High voltage 115 kHz PWM Doc ID 023970 Rev 1 Vishay Fairchild Coilcraft Magnetica ST STEVAL-ISA111V1 Measurements Measurements Figure 2. Line regulation Figure 3. 12.1 12.1 12 12 VOUT[V] VOUT[V] 3 11.9 0 Load regulation 11.9 90 25% 11.8 50% 115 11.8 230 75% 265 100% 11.7 11.7 80 105 130 155 180 205 230 255 0 V IN [VAC ] 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Iout[A] Efficiency vs. VIN 1.1 AM13367v1 AM13366v1 Figure 4. 1 Figure 5. Efficiency vs. load 88 100 86 95 84 90 82 eff [%] eff [%] 85 80 80 90 78 75 25% 50% 70 115 76 230 74 265 75% 65 72 100% 70 60 80 110 140 170 200 230 260 0.2 V IN [VAC ] 0.4 0.6 0.8 1 Iout[A] AM13374v1 Doc ID 023970 Rev 1 AM13377v1 5/9 Measurements Figure 6. STEVAL-ISA111V1 Active mode efficiency vs. VIN Figure 7. Input voltage averaged efficiency vs. load 100 89 95 87 90 85 eff [%] eff [%] 85 80 83 75 81 70 79 65 77 75 60 80 110 140 V IN Figure 8. 170 [VAC ] 200 230 260 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 Iout[A] AM13375v1 AM13376v1 PIN vs. VIN at no load and light load Figure 9. 200 Efficiency vs. VIN at PIN = 1 W 90 0 175 85 25mW 80 50mW 125 75 eff [%] Pin [mW] 150 100 70 75 65 50 60 25 55 50 0 80 105 130 155 180 V IN [VAC ] 205 230 255 80 AM11570v1 6/9 Doc ID 023970 Rev 1 110 140 170 200 230 260 V IN [VAC ] AM13378v1 STEVAL-ISA111V1 4 Board layout Board layout Figure 10. Bottom layer & top overlay AM13484v1 Doc ID 023970 Rev 1 7/9 Revision history 5 STEVAL-ISA111V1 Revision history Table 3. 8/9 Document revision history Date Revision 10-Dec-2012 1 Changes Initial release. Doc ID 023970 Rev 1 STEVAL-ISA111V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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