October 2013

© 2010 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN5776

• Rev. 1.1.0

FAN5776

Synchronous Boost and Series / Parallel 10-LED Driver

Features

5 Strings of 2 LEDs in Series

Channels with Individual Enable and PWM Dimming

Control to Support Various Lighting Applications, such as:

o Backlighting of Dual-LCD Displays, LCD Display Plus

Keypad Illumination

Applications

Description

The FAN5776 is a synchronous, constant-current LED driver

capable of efficiently driving up to ten LEDs in a five-string,

two-series LEDs per string configuration. Optimized for small

form-factor applications, the 1.8 MHz switching frequency

allows the use of tiny chip inductors and capacitors.

For safety, the device features integrated over-voltage, short-

circuit, and thermal shutdown protections. In addition, input

under-voltage lockout protection is triggered if the battery

voltage is too low.

The FAN5776 is comprised of low-dropout, high-side current

sources, enabling a high efficiency delivery of power from the

battery to the LEDs. The LED current control is established

with a series RSET resistor, which is connected between the

internal voltage reference on the chip and ground.

During operation,

FAN5776 holds the boost regulator’s voltage

minimize audible noise.

The FAN5776 is available in a very low profile, small-form-

factors 1.42 x 1.66 x 0.50 mm, 12-bump WLCSP package that

is

“green” and RoHS compliant.

Ordering Information

Part Number

Temperature

Range

Package

Packing

FAN5776UCX

-40 to 85°C

12-Bump, Wafer-Level Chip-Scale Package (WLCSP)

1.42 x 1.66 x 0.50 mm, 0.40 mm Pitch

Tape and Reel