SAN DIEGO – TDK-Lambda Americas Inc. in San Diego is introducing the HQA85 isolated DC-DC converters for commercial off-the-shelf (COTS) military and harsh-environment industrial power electronics applications. Rated at 85 Watts, the HQA85 has been qualified with methods consistent with MIL-STD-883 and MIL-STD-202.
Initially available with 12-, 24-, and 28-volt outputs, the encapsulated quarter bricks accept DC inputs of 9 to 40 volts, withstanding a 50-volt surge for 10 seconds.
With typical efficiencies to 90 percent, internal heating is minimized allowing the HQA85 converters to operate in high ambient temperatures to 115 degrees Celsius and a minimum of -40 C.
No opto-couplers are used in the design for enhanced reliability at high temperatures and the switching frequency is fixed at 270 kHz for simplified noise filtering.
The converter pinout follows the industry standard five-pin quarter brick footprint with negative logic remote on/off and +/- remote sense.
The power converter comes in two package styles: a flanged type measuring 2.39 by 2.2 by 0.5 inches, and a non-flanged version measuring 2.39 by 1.54 by 0.5 inches.
Input-to-output and input to baseplate isolation is 2,250 volts DC (basic insulation), and the converters are safety certified to UL/CSA/EN 60950-1, with the CE marking in accordance with the LV Directive and RoHS Directives.
For more information contact TDK Lambda online at www.us.tdk-lambda.com.
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