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FAN5701

Compact 6-LED Driver for Mobile Platforms

Fairchild Semiconductor 

August 2010

FAN5701 — Compact 6-LED Driver for Mobile Platforms

Features

ƒ Six (6) Parallel LEDs (up to 30mA each)

ƒ Total Package Load Current Capability: 180mA

ƒ Two Default Groups of Four (4) and Two (2) LEDs for

Main and Sub-Display Lighting with Individual PWM

Dimming Controls that Operate up to 20kHz

ƒ >600:1 Dimming Ratio for 100Hz PWM Frequency

ƒ Up to 92% Efficiency

ƒ Built-in 1.5x Charge Pump with Low-Dropout Bypass

Switch

ƒ Wide Input Range: 2.7V to 5.5V

ƒ VOUT Over-Voltage and Short-Circuit Protection

ƒ Over-Temperature Protection

ƒ 1.2MHz Switching Frequency for Small-Sized

Capacitors

ƒ 16-Bump 1.61mm x 1.61mm WLCSP (0.6mm Height)

ƒ 16-Lead 3.0mm x 3.0mm UMLP (0.55mm Height)

Applications

ƒ LCD Backlighting

ƒ Keypad Backlighting

ƒ Mobile Handsets

ƒ Portable Media Player

Description

The FAN5701 is a highly integrated and efficient charge-

pump-based multi-LED driver. The device can drive up to six

LEDs in parallel with a total output current of 180mA.

The FAN5701 is capable of driving a primary display

backlight requiring four to six LEDs. When more than four

LEDs are needed for backlighting, the FAN5701’s two PWM

dimming inputs can be connected together to provide the

proper dimming control for all six LEDs. When a primary and

sub-display is needed, the FAN5701 can be controlled such

that each group can be dimmed independently. For candy-

bar phones requiring a primary display and keypad lighting,

the FAN5701 offers a simple, and compact lighting solution.

Regulated internal current sinks deliver excellent current and

brightness matching to all six LEDs. The device provides

excellent efficiency without an inductor by operating the

charge pump in 1.5x or pass-through modes.

The FAN5701 can be ordered with ISET values of 30mA,

20mA, 15mA, or 8mA and available in WLCSP or ultra-thin

UMLP package types. The default ISET is always determined

by the part number purchased (see Ordering Information)

.

Ordering Information

Part Number

FAN5701UC30X

FAN5701UC20X

FAN5701UC15X

FAN5701UC08X

FAN5701UMP30X

FAN5701UMP20X

FAN5701UMP15X

FAN5701UMP08X

LED Current (ISET)

30mA

20mA

15mA

8mA

30mA

20mA

15mA

8mA

Temperature Range

Package

-40°C to 85°C

WLCSP-16, 0.4mm Pitch

-40°C to 85°C

WLCSP-16, 0.4mm Pitch

-40°C to 85°C

WLCSP-16, 0.4mm Pitch

-40°C to 85°C

WLCSP-16, 0.4mm Pitch

-40°C to 85°C

UMLP-16, 3.0 x 3.0 x 0.55mm

-40°C to 85°C

UMLP-16, 3.0 x 3.0 x 0.55mm

-40°C to 85°C

UMLP-16, 3.0 x 3.0 x 0.55mm

-40°C to 85°C

UMLP-16, 3.0 x 3.0 x 0.55mm

Packing

Tape and Reel

Tape and Reel

Tape and Reel

Tape and Reel

Tape and Reel

Tape and Reel

Tape and Reel

Tape and Reel

© 2009 Fairchild Semiconductor Corporation

FAN5701 • Rev. 1.0.3

www.fairchildsemi.com

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