CEATEC2013-09 e A4 (210mm×297mm) Bidirectional DC-DC Converter CEATEC2013-09 EZA Series: Isolated Type Bidirectional DC-DC Converter with 2.5kW Output Power and 94% Efficiency This isolated DC-DC converter can do power conversion in both directions. Serial communication can be used to implement voltage and current control. The conversion direction can be switched externally, and autonomous operation is also possible. Features • Digitally optimized control realizes conversion efficiency of 94% or better in both directions. • Autonomous operation allows automatic switching of conversion direction to keep input voltage or output voltage constant. • Fast conversion direction switching without stopping operation minimizes bus voltage fluctuations. • Input/output isolation enhances safety and facilitates noise countermeasures. • Serial interface (RS485) allows control of current, voltage, and conversion direction, as well as status monitoring. Major Applications • Electrical storage systems (charge/discharge control of lithium ion battery connected to DC bus) • Various energy regeneration setups • Motor energy regeneration & peak assist systems • Energy regeneration systems in battery-equipped equipment and in equipment manufacturing process, etc. Advantages • Easy configuration of energy management systems involving a combination of solar or other power generation and battery storage < System configuration example > System power supply ・Stabilization of DC bus with storage battery ・Regeneration of energy from storage battery Power receiving equipment Solar power generation Wind power generation Fuel cells Converter 300–380V DC bus AC ⇔ DC inverter Electrical or electronic equipment (DC input) Control via external communication Electrical supply in case of power failure, peak-time power cut etc. Normal electrical supply Discharging Secondary batteries Electrical or electronic equipment (AC input) Charging Storage battery 48V Bidirectional DC-DC converter EZA2500 • High-speed charge/discharge switching helps to • Basic Specifications suppress voltage fluctuations in high-voltage DC bus Discharge → Charge → Discharge switching characteristics Current waveform on 48V side Seamless switchover Charge +42A Seamless switchover Charging Discharging Output voltage 48VDC（36-60VDC） 320VDC（300-380VDC） 320VDC（300-380VDC） 48VDC（36-60VDC） Input voltage Max. efficiency Max. output power OA Discharge 20A/Div -42A 20ms 20mS/Div Discharge 20ms EZA2500-32048 Product name Item Dimensions 94% 94% 2.5kW W:422.8mm H43.6mm（1U）D:400mm External control RS485 Operation mode External/autonomous (external control via RS485) Other items Input/output isolation, expansion by parallel operation possible