STEVAL-ISS001V1 Line interactive 450 W UPS reference design - 120 V / 60 Hz model Data Brief Features ■ Output rating power: 700 VA / 450 W ■ Input voltage: 83 Vac ± 3% - 153 Vac ± 3% ■ Input frequency: 60 Hz ■ Output voltage: 96 - 138 Vac ± 3 Vac ■ Output frequency: 60 Hz ± 0.1 Hz ■ On battery output waveform: quasi-sine (square wave) ■ Transfer time: Class 3 [EN62040-3] ■ Typical recharge time: 8h ■ Backup time (full load): 2.5 - 3 min. ■ Battery quantity: 2 pieces ■ Battery nominal voltage: 12 V ■ Battery capacity: 7.2 Ah ■ Battery recharge: two steps ■ Operating temperature: 0 °C to + 40 °C ■ Storage temperature: - 20 °C to + 60 °C ■ Size (H x W x D): 175 mm x 120 mm x 430 mm ■ Weight: 11 kg ■ Shipping weight: 11.5 kg ■ EMI classification: EN 62040-2 STEVAL-ISS001V1 The UPS was designed with RS-232 joint signal and USB interfaces (USB for RS-232 converter). It is possible to connect the UPS to a PC using an RS-232 or USB cable and control the UPS status through the "UPS Monitor 3.0x" software that must be installed on the same PC. Description This UPS reference design was built employing off-line topology with AVR boost and buck regulation of the mains. The inverter module contains the push-pull DC-DC converter and the DC-AC output full bridge generating a quasi-sine waveform. A microcontroller controls all UPS functions. It monitors the mains parameters (input/output mains voltage and phase, output inverter voltage, battery voltage, output current and output power) in order to ensure the proper level of the output voltage. April 2008 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 Board schematic 1 STEVAL-ISS001V1 Board schematic Figure 1. Schematic D C B RFIEMI12st05v031.sch 1 RXD RXD INP_LEV VCC VCC VCC VDD VDD PHASE PHASE AC_IN2 AC_IN1 AC_IN1 AC_IN2 Input Voltage & Phase Measurement BUTTON INP_LEV INP_LEV AC_IN1 AC_IN2 PHASE InputVoltage12st05v031.sch ACI! ACI! ACF ACF ACF ACL! ACL! ACH! ACH! ACH! OUT_REL! OUT_REL! OUT_REL! OUT_LEV OUT_LEV ACL! INV_A INV_B INV_B HVDC VDD VDD INV_OUT1 GND AC/DC Charger ACDC12st05v031.sch GND CHOFF VDD AC_1 AC_2 VDD +VOUT AC_1 AC_1 AC_2 AC_2 VDD +VOUT +VOUT VDD VBAT AKK_LEV Power Supply VBAT GND VCC Battery Voltage VCCPU VCCPU VCC VCC AC_IN1 AC_IN1 AC_IN1 AC_IN2 AC_IN2 AC_IN2 GND VCC AKK_LEV INV_OUT2 VBAT VBAT VCCPU VCC GND VCC AKK_LEV GND Protection BatteryVoltage12st05v031.sch AC_2 INV_OUT1 VDD GND VAKK BatOver12st05v031.sch GND Battery Overcurrent GND BATTERY VBAT AC_1 AC_2 DC/AC Invverter HVDC VAKK CHOFF CHOFF VDD AC_1 AC_2 INV_OUT2 VDD GND GND HVDC INV_A INV_B SHD VAKK SHD AC_1 DCAC12st05v031.sch VDD VDCDC OUT_LEV DC/DC converter DCDC12st05v031.sch VDCDC GND AVR TRAFO INV_A SHD Output Voltage Inverter InverterVoltage12st05v031.sch GND Microcontroller12st05v031.sch ACI! VDCDC Power Relays RXD AC_IN2 TXD GND TXD AC_IN1 USB_IN! TXD Relays12st05v031.sch GND USB_IN! UPS_OFF! AC_IN1 AC_IN2 ACF1! UPS_OFF! EMI/RFI FILTER AC_IN2 FUSE AC_IN1 ACF1! INPUT USB_IN! BAT_LOW ACF! Inerface unit ACF! ACF1! UPS_OFF! GND BAT_LOW ACF! Interface12st05v031.sch GND BAT_LOW VCC GND LED INDICATIONS Microcontroller unit VCC VCC GND FUSE GND VPP VPP ON/OFF ON/OFF ON/OFF SW_ONP SW_ONP SW_ONP PowerSupply12st05v031.sch VCC IOUT_1 PWR_LEV PWR_LEV IOUT_1 IOUT_1 IOUT_2 IOUT_2 PWR_LEV IOUT_2 GND GND GND Output Current Measurement OutputCurrent12st05v031.sch GND 8 OUTPUT D C B 2/4 STEVAL-ISS001V1 2 Revision history Revision history Table 1. Document revision history Date Revision 14-Apr-2008 1 Changes Initial release. 3/4 STEVAL-ISS001V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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