Gate drive transformers use insulation wire on all windings

The P0584/85NL series provides isolation in MOSFET and IGBT drivers in industrial applications such as motor drive circuits and solar inverters and for power supplies in medical devices. The P0584/85ANL versions extend these to applications that require higher levels of safety and isolation with 30% increased isolation capability (to 4250Vrms) and 20% greater volt-second capability.

The transformers, which are RoHS compliant and meet standard EIA481 requirements, come in a robust package with 8mm creepage distance. The P0584/85NL devices are UL recognised/TUV certified to IEC 60950, while the ANL devices are compliant with the requirements of IEC 61558 and IEC 60601 for reinforced insulation. The transformers, which available in tube packaging, are priced at $1.49 for the P0584NL and $1.69 for the P0585NL, with an additional 20% for the ANL versions. Samples are available.

"Existing toroidal gate drive transformers with triple insulated Teflon wire on just one winding are not compliant to certain safety standards which require mechanical support between windings, even when triple insulated wire is used on one winding," commented Gerard Healy, Product Manager, Power Business Unit, Pulse Electronics. "Pulse's P0584/85ANL series uses insulated wires on all windings, making them fully compliant. In addition, by using smaller wire diameters, the company can increase the number of turns to increase volt-second capability within the same platform size."