Miniature step-up transformers focus on energy harvesting applications
The devices are ideal for voltage step-up in energy harvesting applications and have been selected by Linear Technology for the company’s LTC3108 and LTC3109 ultralow voltage step-up converter and power managers.
The compact, shielded parts measure 6 mm square by 3.5 mm high and feature an excellent coupling coefficient (k = 0.95) and are available with five turns ratios from 1:10 to 1:100 for a variety of voltage step-up and step-down applications. The devices offer 300 V winding-to-winding isolation and their combination of high Isat and low DCR provides high efficiency and excellent current handling in a rugged, low-cost design. Coilcraft also offer an even smaller LPR 4012 Series transformer that measures a mere 4 mm square by 1.1 mm high.
Both versions are RoHS compliant and offer a maximum reflow temperature of 260°C. They feature silver-palladium-platinum-glass frit terminations. COTS Plus tin-silver-copper and tin-lead terminations are also available.
More information about the LPR6235 Series coupled inductors and LPR 4012 Series transformer at www.coilcraft.com/lpr6235.cfm and www.coilcraft.com/lpr4012.cfm
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