SAN DIEGO, 19 Aug. 2016. TDK-Lambda Americas Inc. in San Diego is introducing board-style EVS constant-current AC-DC power supplies for battery charging in energy storage systems, or for other applications requiring constant current outputs such as water purification or plating.
The board-style 300-Watt-rated models can operate without forced-air cooling; the enclosed 600-Watt models have an internal cooling fan. These five-year warranty power supplies will accept a 85-to-265-volt AC input and has nominal 18-volt (300-Watt only), 36-volt and 57-volt outputs for use with 12-volt, 24-volt, and 48-volt lithium ion, nickel hydride and lead acid batteries.
The float voltage is user-adjustable down to the nominal battery voltage and the charging current can set from 50 percent to 100 percent of the rated current. Parallel operation is possible.
The units can operate in ambient temperatures ranging from -20 to 70 degrees Celsius with model dependent derating. The 300-Watt supplies measure 3.31 by 1.65 by 7.09 inches and have an optional perforated cover. The 600-Watt measures 4.72 by 2.4 by 7.48 inches. A remote on/off function is available for both power levels.
Related: 1000-Watt power supplies for ground-based satellite equipment introduced by TDK Lambda
An external stand-alone reverse-protection module is available, preventing backflow of current into the power supply from the battery. Rated at 20 amps and 7-to-60 volts DC, the EVS-RP6020 uses a low-resistance MOSFET to reduce the voltage drop to less than 200 millivolts.
This module is available as a board assembly or with a mounting bracket, measuring 1.97 by 1.02 by 3.05 inches and 2.36 by 1.26 by 3.68 inches respectively.
The power supplies have 3 kilovolts AC input to output, 2 kilovolts AC input to ground and 500 volts DC output to ground isolation. All are certified to UL/CSA/IEC/EN 60950-1 and carry the CE mark for the low voltage and RoHS2 directives.
For more information contact TDK Lambda Americas online at www.us.tdk-lambda.com.
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