DescriptionThe STEVAL-ISV001V1 demonstration board implements a 1 kW dual stage DC-AC converter, suitable for use in battery powered uninterruptible power supplies (UPS) or photovoltaic (PV) stand alone systems. The converter is powered from a low DC input voltage varying from 20 V to 28 V and is capable of supplying up to 1 kW output power on a single phase AC load. These features are met with a dual stage conversion topology including an efficient step-up push-pull DC-DC converter, to produce a regulated high voltage DC bus, and a sinusoidal h-bridge PWM inverter to generate a 50 Hz, 230 Vrms output sine wave. Other relevant features of the proposed system are high power density, high switching frequency, galvanic isolation and efficiency greater than 90% over a wide output load range.STEVAL-ISV001V1www.st.comCircuit schematicsSTEVAL-ISV001V12/6 1 Circuit schematicsFigure 1.Converter schematic: the power stage C1 C2VIN GND M5 M1 R1 R2 0GATE A GATE B R92 R91 R90 R87 C5R88 M6 M4 C55 R8 Features Nominal input voltage: 24 VOutput voltage: 230 Vrms, 50 HzOutput power: 1 kWEfficiency: 90%Switching frequency: 100 kHz (DC-DC); 16 kHz (DC-AC) DescriptionThe STEVAL-ISV001V1 demonstration board implements a 1 kW dual stage DC-AC converter, suitable for use in battery powered uninterruptible power supplies (UPS) or photovoltaic (PV) stand alone systems. The converter is powered from a low DC input voltage varying from 20 V to 28 V and is capable of supplying up to 1 kW output power on a single phase AC load. These features are met with a dual stage conversion topology including an efficient step-up push-pull DC-DC converter, to produce a regulated high voltage DC bus, and a sinusoidal h-bridge PWM inverter to generate a 50 Hz, 230 Vrms output sine wave. Other relevant features of the proposed system are high power density, high switching frequency, galvanic isolation and efficiency greater than 90% over a wide output load range.STEVAL-ISV001V1www.st.comCircuit schematicsSTEVAL Data BriefFor further information contact your