DN71

www.DataSheet4U.com DN71 ZXSC400 Solution for Luxeon® V Star high powered LED Description This design note shows the ZXSC400 driving a Luxeon® V Star LED. The input voltage ranges from 4.2V to 5.4 V with a maximum output current of 790mA at 5V input. A typical schematic diagram is shown in Figure 1. VIN=4.2V to 5.4V L1 D1 Q1 C2 U1 Vcc Stdn Vdrive Isense VFB C1 Gnd ZXSC400 R1 R2 Figure 1 # Schematic diagram Manufacturer Zetex Zetex Zetex Generic Generic Generic Generic Generic Comments LED driver in SOT23-6 Low sat NPN in SOT23 2A Schottky in SOT23 ISAT = 3A 0805 size 0805 size Ref. U1 Q1 D1 L1 R1 R2 C1 C2 Value Part number ZXSC400E6 FZT1049 2A 22mH 22mV 350mV 220mF 450mF ZHCS2000 Generic Generic Generic Generic Generic Table 1 Bill of materials Issue 5 - July 2006 © Zetex Semiconductors plc 2006 1 www.zetex.com DN71 Typical operating characteristics (For typical application circuit where Tamb = 25°C unless otherwise stated) Figure 2 Performance graphs Europe Zetex GmbH Streitfeldstraße 19 D-81673 München Germany Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 [email protected] Americas Zetex Inc 700 Veterans Memorial Highway Hauppauge, NY 11788 USA Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 [email protected] Asia Pacific Zetex (Asia Ltd) 3701-04 Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Telephone: (852) 26100 611 Fax: (852) 24250 494 [email protected] Corporate Headquarters Zetex Semiconductors plc Zetex Technology ...