FAN5343 Datasheet | Fairchild Semiconductor

Features - Asynchronous Boost Converter - VOUT up to 24V - Internal Schottky Diode - Up to 500m W Output Power - 2.7V to 5.5V Input Voltage Range - Single-Wire Digital Control Interface to Set LED Brightness Levels - 32 Linear Steps - Fixed Switching Frequency: 1.2MHz - Soft-Start Capability - Input Under-Voltage Lockout (UVLO) - Output Over-Voltage Protection (OVP) - Short-Circuit Detection - Thermal Shutdown Protection (TSD) - Small 6-Lead 2.0 x 2.0 x 0.55mm UMLP Package Applications - Cellular Mobile Handsets - Mobile Internet Devices - Portable Media Players - PDA, DSC, MP3 Players Description The FAN5343 is an asynchronous constant-current LED driver capable of efficiently delivering up to 500m W to a string of six (6) LEDs in series. Optimized for small form factor applications, the 1.2MHz fixed switching frequency allows the use of small chip inductors and capacitors. The FAN5343 uses a single-wire digital control interface to program the brightness levels of the LEDs in 32 linear steps by applying digital pulses. For safety, the device features integrated over-voltage, overcurrent, short circuit detection, and thermal shutdown protection. In addition, input under-voltage lockout protection is triggered if the battery voltage is too low. The FAN5343 is available in a very low profile, small form factor 2mm x 2mm x 0.55mm 6-lead UMLP package that is green and Ro HS pliant. Ordering Information Part Number Temperature Range FAN5343UMPX -40 to 85 °C Package 6-Lead, Ultra-Thin Molded Leadless (UMLP) Package Packing Tape and Reel © 2009 Fairchild Semiconductor Corporation FAN5343 - Rev. 1.0.4 .fairchildsemi. - 6-LED Series Boost LED Driver with Integrated Schottky Diode and Single-Wired Digital Interface Typical Application Diagram Block...