ACT6310 Datasheet | Active-Semi

Datasheet Rev 0, 1/2005 PRELIMINARY White LED Step-Up Converter Features Inherently Matched LED Current Pin patible with ‘1937 with Higher Efficiency (Up to 86%) 30V High Voltage Switch 1.2MHz Switching Frequency Uses 0.22µF Output Capacitor SOT23-5 Package APPLICATIONS Cellular Phones Digital Cameras PDAs, Handheld puters MP3 Players GPS GENERAL DESCRIPTION The ACT6310 step-up DC/DC converter drives white LEDs with a programmable constant current. The device is capable of driving two, three or four white LEDs in series from a Lithium-Ion battery. Current matching and uniform brightness is inherent in series connection. The ACT6310 incorporates a 30V high voltage...