STEVAL-ISA174V1 7 W dual output offline flyback converter for home appliances using VIPer0P Data brief Description The key feature of this offline converter is ZeroPower Mode (ZPM). It is an idle state during which the device is totally shut down and the residual consumption from the mains @ 230 VAC is kept below 10 mW. The IC enters ZPM by pulling the OFF pin to SGND for more than 10 ms and exits ZPM (resuming normal switching) by pulling the ON pin to SGND for more than 20 µs. This function can be tested by acting on the tactile switches connected to the ON and OFF pins. Features Zero-power input consumption ratified as per IEC62301 Clause 4.5 (PIN_ZPM < 5 mW @ 230 VAC) Negative output voltage easily set through the voltage divider Five-star energy efficiency when operating with no load (PIN_no_load < 10 mW @ 230 VAC) Meets ErP Lot 6 Tier 2 requirements for household and office equipment Meets European regulation 1275/2008 regarding eco-design requirements for standby and off-mode electric power consumption for household and office equipment Compliant with the ErP Lot 6 Tier 2 requirements in off-mode Compliant with the 10% load efficiency and 4-point average active-mode efficiency targets prescribed by the European CoC ver. 5 Tier 2 Meets IEC55022 Class B conducted EMI even with reduced EMI filter, thanks to the frequency jittering feature VIPer0P 800 V avalanche rugged technology and its embedded protections ensure enhanced system reliability RoHS compliant November 2015 The negative voltage setup is extremely simplified thanks to an embedded error amplifier, whose accurate 1.2 V internal reference (FB pin) is referred to a separate ground (EAGND pin) that can drift down to -12.5 V with respect to the signal ground of the IC (SGND). The negative output (OUT1) is obtained by just connecting EAGND to the negative rail and a voltage divider between FB, EAGND and SGND. The positive output (OUT2) is obtained from OUT1 through the turn ratio of the secondary windings of the transformer. To achieve extremely low input power consumption, the IC is biased through a diode coming from the OUT2, which maintains the VCC voltage high enough (> 4.5 V) to prevent the activation of the internal HV current source. DocID028199 Rev 3 For further information contact your local STMicroelectronics sales office 1/5 www.st.com Specifications 1 Specifications 2/5 STEVAL-ISA174V1 Topology: Flyback Isolation: no Input power consumption: Less than 5 mW @ 230 VAC in Zero-Power Mode Less than 10 mW @ 230 VAC in no-load condition Less than 400 mW @ 230 VAC with 250 mW load Input Voltage: 85 - 265 VAC Output 1: -5 V , 840 mA Output 2: 7 V, 400 mA Frequency: 60 kHz with jittering (±7%) Max amb temp: 60 °C Automatic restart protections: OLP, VCC clamp, max duty cycle counter, thermal shutdown Pulse-skip protection to prevent the flux-runaway Dimensions: 69.6 mm x 28 mm DocID028199 Rev 3 IN 2 1 10 R1 MRA4007 D6 MRA4007 D1 R4 3.3k R3 10k 1mH L2 DocID028199 Rev 3 1 4 EAGND 2 OFF 18 ON 17 15 0nF PGND SGND C7 Vcc R5 C6 82k 1nF Drain Drain Drain Drain COMP 3 FB 7 8 D5 220pF OFF ON 220pF C9 470uF 16ZLK470M8X16 2 1 ZERO POWER 1 Te connectivity V (RS 680-5129) 2 3 M.3VITE +7V-400mA GND -5V-800mA C11 100uF 25V + C8 470uF 16V ZL R6 16ZLJ470M8X11.5 TBD 4.7uH L3 STPS2L60A TRANSFORMER_WURTH_750314288 IC1 VIPER0P 4 9 D4 STPS1L60A 10 BAT41ZFILM 2 TR1 R2 220k 1/2W D2 MRA4007 C3 1nF 16 15 14 13 6 5 C4 100pF C5 10uF + C1 C2 + 15uF 450V 1mH L1 15uF 450V + C12 1uF C10 1uF M.3VITE OUT 1 2 3 2 D3 STEVAL-ISA174V1 Schematic diagram Schematic diagram Figure 1: STEVAL-ISA174V1 circuit schematic C17 C16 220pF 0 0 C15 GSPG12082015DI1230 3/5 Revision history 3 STEVAL-ISA174V1 Revision history Table 1: Document revision history 4/5 Date Version Changes 07-Aug-2015 1 Initial release. 10-Aug-2015 2 Added: Section Specifications. 20-Nov-2015 3 Updated title on the cover page. 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All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2015 STMicroelectronics – All rights reserved DocID028199 Rev 3 5/5