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0,9V-Treiber für weiße LEDs - benötigt nur ein externes Bauteil

(PresseBox) (Mainz, )
Kern des neuen Treiber-ICs PR4401 ist ein Aufwärtswandler mit Stromausgang, der die für weiße LEDs typische Ausgangsspannung von 3,6V bei Eingangsspannungen ab ca. 0,9V zur Verfügung stellt. Die niedrige Eingangsspannung ermöglicht somit den Einsatz bei einem Einzellen-Batteriebetrieb.

Selbst um drei LEDs in Serie zu betreiben, ist lediglich eine externe Spule notwendig. Auf externe Vorwiderstände für die LEDs zur Einstellung der Helligkeit kann vollkommen verzichtet werden, da ein geregelter Strom von bis zu 23mA je nach Spulenwert zur Verfügung gestellt wird.

Der PR4401 bietet einen hohen Wirkungsgrad von ca. 80% über den gesamten Eingangsspannungsbereich von 0,9V bis etwa 2V. So läßt
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The publisher indicated in each case (see company info by clicking on image/title or company info in the right-hand column) is solely responsible for the stories above, the event or job offer shown and for the image and audio material displayed. As a rule, the publisher is also the author of the texts and the attached image, audio and information material. The use of information published here is generally free of charge for personal information and editorial processing. Please clarify any copyright issues with the stated publisher before further use. In case of publication, please send a specimen copy to service@pressebox.de.