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LINEAR TECHNOLOGY GmbH Oskar-Messter-Straße 24 85737 Ismaning, Germany http://www.linear.com
Contact Doug Dickinson +1 408-432-1900 ext. 2233
Company logo of LINEAR TECHNOLOGY GmbH
LINEAR TECHNOLOGY GmbH

Hochspannungs-"Ideale-Diode"-OR-Controller bietet höheren Wirkungsgrad und sanftes, schwingungsfreies Umschalten

(PresseBox) (Ismaning, )
Der neue LTC4357 von Linear Technology ist ein Einkanal-Hochspannungs-"Ideale-Diode"-OR-Controller, der als einfacher, verlustarmer Ersatz für Schottky-OR-Verknüpfungsdioden in Mehrfach-N+1-redundanten Stromversorgungen und Hochverfügbarkeitssystemen vorgesehen ist. Der LTC4357 steuert einen externen n-Kanal-MOSFET, der sich wie eine Diode mit sehr kleiner Durchlassspannung verhält. Dadurch ist die Verlustleistung kleiner als bei Verwendung einer Schottky-Diode, und man erzielt in Hochleistungsanwendungen nicht nur einen höheren Wirkungsgrad, sondern spart auch noch Platz, weil kein Kühlkörper benötigt wird. Der LTC4357 steuert den Durchlassspannungsabfall über dem MOSFET in der Weise, dass beim Umschalten von einem Pfad auf den anderen keine Oszillationen oder Rückströme auftreten.

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