Description
The FAN5346 is an asynchronous constant-current LED driver that drives LEDs in series to ensure equal brightness for all the LEDs. FAN5346S20X has an output voltage of 20V and can drive up to 5 LEDs in series. FAN5346S30X has an output voltage of 30V and up to 8 LEDs in series. Optimized for small form-factor applications, the 1.2MHz fixed switching frequency allows the use of small inductors and capacitors.

Features
■ Asynchronous Boost Converter
■ Drives LEDs in Series:
    − FAN5346S20X: 20V Output
    − FAN5346S30X: 30V Output
■ 2.5V to 5.5V Input Voltage Range
■ PWM Dimming for LED Brightness Control
■ 5kHz to 100kHz PWM Dimming Frequency Range
■ 1.2MHz Fixed Switching Frequency
■ Soft-Start Capability
■ Input Under-Voltage Lockout (UVLO)
■ Output Over-Voltage Protection (OVP)
■ Short-Circuit Detection
■ Thermal Shutdown (TSD) Protection
■ Small Form-Factor 6-Lead SSOT23 Package

Applications
■ Cellular Mobile Handsets
■ Mobile Internet Devices
■ Portable Media Players
■ PDA, DSC, MP3 Players