FAN5606 - Fairchild Semiconductor

FAN5606 Serial LED Driver

The FAN5606 LED driver generates regulated output currents from a battery with input voltage varying between 2.7V to 5V. An internal NMOS switch drives an external inductor, and a Schottky diode delivers the inductor’s stored energy to the load. Soft start circuitry prevents excessive current drawn from the supply during power on. Any number of LEDs can be c.

Features

• Drives Up to Six LEDs in Series
• Pulse Skip PWM Mode of Operation of the Boost Circuit
• Up to 90% Peak Efficiency
• No External Schottky Diode Required
• Up to 25mA Output
• Built-in DAC for Digital Brightness Control
• LED’s Current Can be Duty-Cycle-Modulated
• Digital, Analog, and PWM Brightness Control
• 2.7V to 5.5V Input Voltage Range
• 0.5MHz Operating Frequency (8MHz internal clock)
• Soft Start
• Low Shutdown Current: ICC < 1µA
• LED Short Circuit Protection
• Minimal External Components Needed
• Available in an 8-lead MLP Package Applications
• Cell Phones
• Handheld Computers
• P.