FEATURES
s Inherently Matched LED Current s Drives Up to 8 LEDs from a 3.6V Supply s No External Schottky Diode Required s 1.2MHz Switching Frequency s Automatic Soft-Start s Open LED Protection s High Efficiency: 81% s Requires Only 0.22uF Output Capacitor s Low Profile (1mm) SOT-23 Packaging APPLICATION s Cellular Phones s PDAs, Handheld Computers s Digital Cameras s MP3 Players s GPS Receivers DESCRIPTIO Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors. Additional features include output voltage limiting when LEDs are disconnected, onepin shutdown and dimming control. The FSP3307has internal soft-start. TheFSP3307switches at 1.2MHz, allowing the use of tiny external components. Constant frequency switching results in low input noise and a small output capacitor. Just 0.22µF is required for 4-, 6- or 8-LED applications. The FSP3307 is available in low profile(1mm)6-lead TYPICAL APPLICATION FSP3307 Figure 1. Li-Ion Powered Dri...
Linear Technology
