DC-DC converter series provides extended voltage and temperature ranges

TDK Corporation has introduced the EZA2500W-32048 TDK-Lambda brand bi-directional DC-DC converter model to its EZA series. The extended high voltage range now comprises 260VDC to 400VDC and the lower voltage 36VDC to 65VDC. The operating temperature has been extended to -10C to +50C. Double-sided protective board coating and long-life dust resistant fans have also been incorporated.

Created for energy storage systems with rechargeable batteries, this 2500W digitally controlled, compact 1U power supply can seamlessly switch conversion direction from high voltage DC sources, powered by solar or wind, to 48VDC batteries and vice versa. Other applications comprise lithium-ion battery testing as well as the usage of regenerated energy from cranes, robots, autonomous ground vehicles and lifts. The device can be employed to replace large power resistors currently utilised for lift braking and employ that previously dissipated energy to charge batteries. That stored energy can be employed to either offer peak power for high torque demands or as battery back-up for power cuts.

The output voltage and current can be programmed and monitored utilising the RS-485 communications port. Multiple units can be run in parallel by employing the RS-485 interface to set units for 'droop mode' current share. Alarm signals are also available, as well as remote on/off and under/over voltage functionality. The high voltage (grid) to low voltage (battery) isolation is 3,000VAC, grid to ground 2,000VAC and battery to ground 500VAC.

The dimensions for the device is 43.6mm (1U) high, 423mm wide and 400mm deep. All models in the series are certified to the IEC/EN/UL 60950-1 and IEC/EN/UL 62368-1 safety standards with CE marking for the Low Voltage, EMC and RoHS Directives. A five-year warranty is supplied as standard.