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Date: 11/15/05

SP6687 4Channel Charge Pump White LED Driver

© Copyright 2005 Sipex Corporation

SP6687

FEATURES

■ High Efficiency > 90%

■ Support up to 4 White LEDs with current

matching

■ Three Charge Pump Modes: X1, X1.5, X2

■ Soft Start Function

■ Short Circuit Protection

■ Output Overvoltage Protection

■ Thermal Shutdown

■ Programmable LED drive capability

■ PWM Dimming Control

■ 1MHz Fixed Frequency Oscillator

■ Pin Compatible with SC604

4 Channel Charge Pump White LED Driver

The SP6687 is a compact, highly efficient and highly integrated 4 channel charge pump white LED

driver. It can support from 1 to 4 White LEDs and is optimized for Li-Ion battery applications.

Current matching allows all 4 LEDs to maintain consistent brightness. Users can control White

LEDs by three programming bits. Each channel can support up to 30mA of current. This device

is available in a 4mm x 4mm, 16 pin QFN package.

®

TYPICAL APPLICATION CIRCUIT

Now Available in Lead-Free Packaging

APPLICATIONS

■ Mobile phones

■ White LED Backlighting

■ Camera Flash LED lighting

Typical Application Circuit for 4-White LEDs

DESCRIPTION

VOUT

ISET

SP6687

16 Pin QFN

8

7

6

5

4

3

2

1

16

15

14

13

12

11

10

9

C1P

VIN

LED4

LED3

LED2

LED1

Pin 1

Orientation

EN

CTRL0

CTRL1

CTRL2

C1P

C1N

C2P

C2N

GND

LED1

LED2

LED3

LED4

Li-ion

Battery

C1 1µF

C2 1µF

2

1

3

4

5

6

7

89

10

11

12

13

14

15

16

SP6687

®

1µF

1µF