A family of industry-standard half brick dc-dc converters sports a super-wide 8:1 input voltage range of 18 to 135 V, which doubles the existing ultra-wide 4:1 input ratio standard. With one converter, designers can satisfy EN50155 requirements for 36-V, 48-V, and 72-V railway systems. The IQ64 family uses a patented two-stage topology with a constant mid-bus voltage, which enables an optimized isolation stage design based on synchronous rectifiers. The result is reduced heat loss and operation at up to 90% efficiency at full load. The converter family offers nine output voltages ranging from 1.8 V to 48 V, and power levels ranging from 90 to 200 W. For each output voltage there are two converters: one with a power ranting in the 200-W range, and a second cost-optimized unit in the 150-W range for lower power requirements. Fully encased and ruggedized, the isolated dc-dc converters are ideal for industrial and transportation applications. The IQ64 series is available from stock for evaluation and qualification. Production quantities have eight- to 12-week lead times. SYNQOR, Boxborough, MA. (978) 849-0600.
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