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ON Semiconductor stellt 6-W-LED-Treiber mit integriertem DC/DC-Boost-Wandler für große LCD-Panel-Hintergrundbeleuchtungen vor  Chinese Japanese Korean

Kanal-LED-Treiber CAT4106 mit On-Chip-Diagnostik für maximalen Wirkungsgrad

CAT4106 6-Watt LED driver with Integrated dc-dc boost converterON Semiconductor (Nasdaq: ONNN), ein führender Anbieter hochleistungsfähiger, energieeffizienter Halbleiterlösungen, stellt mit dem CAT4106 einen 6-W-LED-Treiber mit integriertem, hochleistungs-fähigem DC/DC-Boost-Wandler und On-Chip-Diagnosefähigkeiten vor, mit dem sich der Wirkungsgrad in größeren, universellen LCD-Panel-Hintergrundbeleuchtungen maximieren lässt.

Als erster Mehrkanal-Boost-Baustein des Unternehmens kann der CAT4106 bis zu 40 weiße LEDs ansteuern – oder vier Stränge mit 10 LEDs; mit bis zu 36 V pro Strang – was insgesamt 6 W LED-Ausgangsleistung entspricht. Der Baustein ermöglicht es Entwicklern auch, den Wirkungsgrad der Hintergrundbeleuchtung zu maximieren und deren Platzbedarf zu verringern. Integrierte Diagnosefunktionen justieren automatisch die Ausgangsspannung des Treibers, um den Strang mit der höchsten Durchlassspannung mit minimaler Spannungsreserve anzusteuern.

Der integrierte Diagnoseschaltkreis erlaubt über externe Programmierwiderstände das Einstellen minimaler und maximaler Spannungsgrenzwerte für den zulässigen Betriebsbereich der LED-Stränge. Jeder Kanal, der nicht innerhalb des eingestellten Bereichs zwischen offenem Schaltkreis und Kurzschluss regelt, wird erkannt und am FAULT-Logikausgang (active-low, open-drain) angezeigt. Der Baustein bietet auch Abschaltung bei Übertemperatur und Überspannungsschutz.

Der CAT4106 bietet Low-Dropout-LED-Kanäle mit 500 mV bei 175 mA und eine HF-fähige PWM-Schnittstelle, die Frequenzen bis zu 2 kHz unterstützt. Damit ergibt sich eine präzise, hochauflösende Dimmerregelung während der Baustein weiterhin im Full-Biased-Zustand bleibt.

Leistungsmerkmale

  • vier angepasste LED-Ausgangskanäle
  • integrierter DC/DC-Boost-Wandler
  • bis zu 6 W LED-Gesamtausgangsleistung
  • Low-Dropout-LED-Kanäle, 500 mV bei 175 mA
  • HF-PWM-Schnittstelle bis zu 2 kHz
  • On-Chip-Diagnostik mit justierbarer LED-Kurzschluss-/Leerlauferkennung
  • Gehäuse:
    16-poliges TQFN, 4 mm x 4 mm
    16-poliges TSSOP, 4,4 mm, Exposed Thermal Pad

Preis und Verfügbarkeit
Der LED-Treiber CAT4106 wird im Platz sparenden 16-poligen, 4 mm x 4 mm TQFN- oder im 16-poligen TSSOP-Gehäuse mit freigelegtem Thermal Pad für eine bessere Wärmeableitung ausgeliefert. Bei Abnahme in Einheiten zu 10.000 Stück kostet der Baustein 1,06 US-$. Samples und Evaluierungsboards sind ab sofort verfügbar. Die Lieferzeit für hohe Stückzahlen beträgt etwa 6 bis 8 Wochen.

Weitere technische Informationen unter www.onsemi.com oder über Fabien Franc, Applikationsmanager: fabien.franc@onsemi.com.

Über ON Semiconductor
Mit seinem weltweiten Logistiknetzwerk und umfangreichen Produktangebot ist ON Semiconductor (Nasdaq: ONNN) ein führender Anbieter hochleistungsfähiger und energieeffizienter Halbleiterlösungen für die Bereiche Stromversorgung, Automotive, Kommunikation, Computer, Consumer, Medizintechnik, Industrie, Mobilfunk und Verteidigungs-/ Luft-/Raumfahrttechnik. Zum Portfolio des Unternehmens zählen Leistungselektronik- und Analog-Bausteine, DSPs, Mixed-Signal-ICs, fortschrittliche Logik-Bausteine, Taktmanagement-ICs und Standardbauteile. Der Unternehmenssitz befindet sich in Phoenix, Arizona. ON Semiconductor verfügt über ein Netzwerk an Fertigungsstätten, Vertriebsniederlassungen und Design-Centern in den wichtigen Märkten Nordamerika, Europa und im asiatisch-pazifischen Raum. Weitere Informationen unter: http://www.onsemi.com.

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