STEVAL-ISA174V1 STMicroelectronics

STEVAL-ISA174V1 Data brief 7 W dual output offline flyback converter for home appliances using VIPer0P Features Zero-power input consumption ratified as per IEC62301 Clause 4.5 (P < 5 IN ZPM mW at 230 V ) AC Negative output voltage easily set through the voltage divider Five-star energy efficiency when operating with no load (P < 10 mW at IN no load 230 V ) AC 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 Description The key feature of this offline converter is Zero-Power Mode (ZPM). It is an idle state during which the device is totally shut down and the residual consumption from the Product summary table mains at 230 V is kept below 10 mW. The IC enters ZPM by pulling the OFF pin to AC 7 W dual output SGND for more than 10 ms and exits ZPM (resuming normal switching) by pulling the offline flyback ON pin to SGND for more than 20 s. This function can be tested by acting on the converter for STEVAL-ISA174V1 tactile switches connected to the ON and OFF pins. home appliances The negative voltage setup is extremely simplified thanks to an embedded error using VIPer0P amplifier, whose accurate 1.2 V internal reference (FB pin) is referred to a separate VIPerPlus family: ground (EAGND pin) that can drift down to -12.5 V with respect to the signal ground Zero-power off- VIPer0P of the IC (SGND). The negative output (OUT1) is obtained by just connecting line high voltage EAGND to the negative rail and a voltage divider between FB, EAGND and SGND. converter 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 V voltage high enough (> 4.5 V) to CC prevent the activation of the internal HV current source. DB2654 - Rev 4 - February 2018 www.st.com For further information contact your local STMicroelectronics sales office.STEVAL-ISA174V1 Specifications 1 Specifications Topology: Flyback Isolation: no Input power consumption: Less than 5 mW at 230 V in Zero-Power Mode AC Less than 10 mW at 230 V in no-load condition AC Less than 400 mW at 230 V with 250 mW load AC Input Voltage: 85 - 265 V AC 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 DB2654 - Rev 4 page 2/5