Description
The FAN5341 is an asynchronous constant-current LED driver capable of efficiently delivering up to 500mW to a string of up to five LEDs in series. Optimized for small formfactor applications, the 1.2MHz fixed sw itching frequency allow s the use of small chip inductors and capacitors.
The FAN5341 uses a simple single-w ire 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-shutdow n protection. In addition, input under-voltage lockout protection is triggered if the battery voltage is too low .
The FAN5341 is available in a very low profile, small formfactor 2mm x 2mm x 0.55mm 6-lead UMLP package that is green and RoHS compliant.

FEATUREs
■ Asynchronous Boost Converter
■ Internal Schottky Diode
■ Up to 500mW Output Pow er
■ Drives 3 to 5 LEDs in Series
■ 2.7V to 5.5V Input Voltage Range
■ Single-Wire Digital Control Interface to Set LED
   Brightness Levels
    32 Linear Steps
■ 1.2MHz Fixed Sw itching Frequency
■ Soft-Start Capability
■ Input Under-Voltage Lockout (UVLO)
■ Output Over-Voltage Protection (OVP)
■ Short-Circuit Detection
■ Thermal Shutdow n (TSD) Protection
■ Low Profile 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