Description

The FAN5345 is an asynchronous constant-current LED driver that drives LEDs in series to ensure equal brightness for all the LEDs. FAN5345S20X has an output voltage of 20V and can drive up to 5 LEDs in series. FAN5345S30X has an output voltage of 30V and drive 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:

- FAN5345S20X: 20V Output

- FAN5345S30X: 30V Output

■ 2.5V to 5.5V Input Voltage Range

■ Single-Wire Digital Control Interface to Set LED Brightness Levels

- 32 Linear Steps

■ 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