DN62 ZXSC310 Solution to drive 3 LEDs connected in series Description This solution is optimized for an input voltage range of 4.3V to 3V. The LED current is set to 15mA VIN = 4.3V and 8mA at VIN = 3V. ZXSC310 Issue 3 - July 2006 © Zetex Semiconductors plc 2006 Figure 1 Schematic diagram Figure 2 Performance graphs 1 www.zetex.com DN62 Reference Part no. Value Manufacturer Contact details U1 ZXSC310E5 NA Zetex www.zetex.com Q1 FMMT618 NA Zetex www.zetex.com D1 ZHCS1000 1A Zetex www.zetex.com R1 Generic 510m⍀ Generic NA R2 Generic 510F Generic NA C1 Generic 2.2F Generic NA L1 DO1608P-103 10H Coilcraft www.coilcraft.com LED1-3 NSPMW500BS White LED Nichia www.nichia.com Table 1 Bill of materials Europe Americas Asia Pacific Corporate Headquarters Zetex GmbH Streitfeldstraße 19 D-81673 München Germany Zetex Inc 700 Veterans Memorial Highway Hauppauge, NY 11788 USA Zetex (Asia Ltd) 3701-04 Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Zetex Semiconductors plc Zetex Technology Park, Chadderton Oldham, OL9 9LL United Kingdom Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 [email protected] Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 [email protected] Telephone: (852) 26100 611 Fax: (852) 24250 494 [email protected] Telephone: (44) 161 622 4444 Fax: (44) 161 622 4446 [email protected] For international sales offices visit www.zetex.com/offices Zetex products are distributed worldwide. For details, see www.zetex.com/salesnetwork This publication is issued to provide outline information only which (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contact or be regarded as a representation relating to the products or services concerned. The company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service. www.zetex.com 2 Issue 3 - July 2006 © Zetex Semiconductors plc 2006