描述 Description

The FP6737/A is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive two to seven LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED current resulting in uniform brightness and eliminating the need for ballast resistors. The FP6737/A switches at 1.2MHz, allowing the use of tiny external components. The output capacitor can be as small as 0.22μF for saving space and cost versus alternative solutions. A low 250mV/104mV feedback voltage minimizes power loss in the current setting resistor for better efficiency. The FP6737/A is available in low profile SOT-23-6 and TSOT-23-6 packages.

特性 Features

● Inherently Matched LED Current
● High Efficiency: 87%
● Drives up to Seven LEDs from a 3.2V Supply
● 33V Internal Switch
● Fast 1.2MHz Switching Frequency
● Use Tiny 1mm Tall Inductors
● Need only 0.22μF Output Capacitor
● Low Profile SOT-23-6 and TSOT-23-6 Packages
● Built-In Open Circuit Protection
● Over Voltage Protection
● RoHS Compliant

應(yīng)用 Application

● Cellular Phone
● Digital Camera
● MP3 Player
● GPS Receiver
● PDA, Handheld Computer