DN75 ZXSC310 Solar powered garden light reference design Description This design note shows a typical ZXSC310 LED driver circuit for a solar powered garden light. The input voltage ranges from 0.4V to 1.6V with a maximum output current of 43mA at 1V input. A typical schematic diagram is shown in Figure 1. D1 L1 VIN U1 C3 Q1 VCC VDRIVE C1 C2 Stdn ISENSE Gnd ZXSC310 R1 Figure 1 Ref. Value Schematic diagram Part Number Manufacturer Comments U1 ZXSC310E5 Zetex LED Driver in SOT23-5 Q1 FMMT617 Zetex Low sat NPN in SOT23 ZHCS1000 Zetex 1A Schottky in SOT23 0805 size D1 1A L1 37H R1 100m⍀ Generic Generic C1 1F Generic Generic C2 22F Generic Generic C3 10F Generic Generic Table 1 Issue 2 - July 2006 © Zetex Semiconductors plc 2006 Bill of materials 1 www.zetex.com DN75 Typical operating characteristics (For typical application circuit where Tamb = 25°C unless otherwise stated) Figure 2 Performance graphs 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 2 - July 2006 © Zetex Semiconductors plc 2006