STEVAL-ISA117V1 Wide range isolated flyback demonstration board, single output 12 V/4.2 W based on the VIPER16LN Data brief Description This board implements a 4 W single-output wide range mains power supply set in flyback isolated topology, using the VIPER16LN, an off-line high voltage converter by STMicroelectronics. STEVAL-ISA117V1 GIPD1712121716FSR Features Universal input mains range: input voltage 90 - 264 VAC frequency 45 - 65 Hz Single output voltage: 12 V at 0.35 A continuous operation Stand-by mains consumption: < 30 mW at 230 VAC Average efficiency: > 75 % Fully protected against faults (overload, feedback disconnection and overheating) EMI: according to EN55022-Class-B May 2013 The features include an 800 V avalanche rugged power section, PWM operation at 60 kHz with frequency jittering for lower EMI, current limiting with adjustable set point, on-board soft-start, a safe auto-restart after a fault condition and a low stand-by power. The device does not require a biasing circuit to operate because the IC can be supplied by an internal current generator, therefore saving the cost of the transformers auxiliary winding. If the device is biased through an auxiliary winding, the demonstration board can reach very low standby consumption (< 30 mW at 230 VAC, with output load disconnected). The IC implements several protections that considerably increase end-product safety and reliability: thermal shutdown with hysteresis, delayed overload protection, open loop failure protection (the last one available only if the device is biased through the auxiliary winding). DocID024074 Rev 1 This is information on a product in full production. 1/13 www.st.com Contents STEVAL-ISA117V1 Contents 1 Adapter features .............................................................................. 3 2 BOM and schematic ........................................................................ 4 3 Layout .............................................................................................. 6 4 5 Transformer ..................................................................................... 7 Electrical performances .................................................................. 9 6 Revision history ............................................................................ 12 2/13 DocID024074 Rev 1 STEVAL-ISA117V1 1 Adapter features Adapter features The electrical specifications of the demonstration board are listed below: Table 1: Electrical specification Parameter Symbol Value Input voltage range VIN [90VAC; 265VAC] Output voltage VOUT 12V Max output current IOUT 0.35A Precision of output regulation ΔVOUT_LF ±5% High frequency output voltage ripple ΔVOUT_HF 50mV Max. ambient operating temperature TAMB 60 ºC DocID024074 Rev 1 3/13 BOM and schematic 2 STEVAL-ISA117V1 BOM and schematic Table 2: Bill of material 4/13 Reference Part Description Manufacturer D0 DF06M Diode bridge VISHAY C1, C2 4.7μF, 400V Electrolytic capacitor, NHG series PANASONIC C3 Not mounted C4 10μF, 35V Electrolytic capacitor, GA series PANASONIC C5 100nF, 50V Ceramic capacitor, SR series AVX C8 3.3nF, 100V Ceramic capacitor C9 470μF, 25V Ultra-low ESR electrol. Cap., ZL serie C10 Not mounted Electrolytic capacitor C11 33nF, 50V Ceramic capacitor B3798x serie EPCOS C12 2.2nF Y1 capacitor 440L serie VISHAY C13 100nF, 50V Ceramic capacitor, SR serie AVX D1 Not mounted Clamp diode D2 STPS2H100 Output diode 2A, 100V STMicroelectronics D3 BAT46 Small signal diode STMicroelectronics Dz 18V Zener diode Rz 6.8kΩ 1/4W resistor R1 4.7Ω 1W resistor R4 Not mounted 1/4W resistor R5 Not mounted 1/2W resistor R8 8.2kΩ 1/4 W resistor R9 15kΩ 1/4 W resistor R10 680kΩ 1/4W resistor R11a 120kΩ 1/4W resistor R11b 27kΩ 1/4W resistor R12a 15kΩ 1/4W resistor R12b 1.8kΩ 1/4W resistor IC1 VIPER16LN PWM controller STMicroelectronics IC2 TS431 Voltage reference STMicroelectronics IC3 PC817 Optocoupler L1 1mH Filter inductor BC type L2 Short-circuit L3 1µH Small signal inductor DocID024074 Rev 1 Rubycon TYCO Electronics EPCOS STEVAL-ISA117V1 BOM and schematic Reference Part Description Manufacturer T1 1335.0062 Transformer MAGNETICA J Jumper R12b R10 IC2 2 GND R4 LIM C8 COMP CONTROL AC IN AC IN - R1 D0 + C1 + L1 C2 + Rz Dz C4 + C5 J FB L3 VDD IC1 D3 R5 DRAIN D1 C3 4 1 5 T1 C12 8 D2 7 + C9 R8 IC3 L2 R9 C10 + C13 C11 R11a R11b R12a - Vout Figure 1: Application schematic GIPD131212 1123FSR DocID024074 Rev 1 5/13 Layout 3 STEVAL-ISA117V1 Layout Figure 2: Board layout GIPD1312121146FSR 6/13 DocID024074 Rev 1 STEVAL-ISA117V1 4 Transformer Transformer The transformer characteristics are listed in the table below. Table 3: Transformer characteristics Parameter Value Test conditions Manufacturer MAGNETICA Part number 1335.0062 Primary inductance 1.2mH ±15% Measured at 1kHz 0.1V Leakage inductance 2.9% Measured at 10kHz 0.1V Primary to secondary turn ratio (4 - 5)/(7, 8) 7.85 ±5% Measured at 10kHz 0.1V Primary to auxiliary turn ratio (4 - 5)/(1 - 2) 7.33 ±5% Measured at 10kHz 0.1V The following figures show size and pins distances (mm) of the transformers. Figure 3: Transformers pins distances GIPD1312121647FSR DocID024074 Rev 1 Figure 4: Transformer electrical diagram GIPD1312121654FSR 7/13 Transformer STEVAL-ISA117V1 Figure 5: Transformer side view Figure 6: Transformer size and pin diagram GIPD1312121806FSR 8/13 DocID024074 Rev 1 GIPD1312121810FSR STEVAL-ISA117V1 Electrical performances Figure 7: Standby consumption at no/light load: IC externally biased (J selected) Figure 8: Standby consumption at no/light load: IC self biased (J not selected) 250 350 0 200 300 25mW 250 PIN [mW] PIN [mW] 50mW 150 100 200 150 0 100 50 25mW 50 50mW 0 0 80 105 130 155 180 205 230 80 255 105 130 VIN [VAC] 155 180 205 VIN [VAC] GIPD1412121346FSR 230 255 GIPD1412121422FSR Figure 9: Line regulation Figure 10: Load regulation 12.3 12.3 12.2 12.2 0 25% 50% 12.1 75% V OUT [V] Vout[V] 5 Electrical performances 90 115 12.1 230 100% 265 12 12 11.9 11.9 105 130 155 180 205 230 255 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 IOUT [A] Vin[V] GIPD1412121446FSR DocID024074 Rev 1 GIPD1412121459FSR 9/13 Electrical performances STEVAL-ISA117V1 Figure 12: Efficiency @ PIN= 1W, IC self biased 80 80 75 75 70 70 65 65 eff [%] eff [%] Figure 11: Efficiency @ PIN= 1W, IC externally biased 60 60 55 55 50 50 45 45 40 40 80 110 140 170 200 VIN [VAC] 230 260 80 110 140 170 200 VIN [VAC] GIPD1412121516FSR 230 260 GIPD1412121518FSR Figure 13: PIN @ POUT = 0.25W, IC externally biased Figure 14: PIN @ POUT = 0.25W, IC self biased 0.5 0.8 0.75 0.45 0.4 P IN [W] PIN [W] 0.7 0.65 0.35 0.6 0.55 0.5 0.3 0.45 0.4 0.25 80 110 140 170 200 VIN [VAC] 230 260 GIPD1412121521FSR 10/13 DocID024074 Rev 1 80 110 140 170 200 V IN [V AC] 230 260 GIPD1412121528FSR STEVAL-ISA117V1 Electrical performances Figure 15: Active mode efficiency and comparison with energy efficiency standards (IC externally biased) 81 79 77 eff [%] 75 73 DOE limit 71 69 67 CoC 4 limit 115 230 av @ 115 Vac av @ 230 Vac 65 0.4 0.6 0.8 Iout [% IOUT ] DocID024074 Rev 1 1 GIPD1412121535FSR 11/13 Revision history 6 STEVAL-ISA117V1 Revision history Table 4: Document revision history 12/13 Date Revision Changes 21-May-2013 1 First release. 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