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Date: 07/07/04

SP6683 White LEDs Driver for Parallel Configuration

© Copyright 2004 Sipex Corporation

SP6683

DESCRIPTION

The SP6683 is a high power current regulated charge pump ideal for converting a Li-Ion

battery input for driving up to 8 white LED’s used in backlighting color displays. The SP6683

operates with an internal 1.2MHz clock, enabling the use of small external components.

Output current can be accurately regulated by modulating the switcher between the charge

pump and output capacitor. In shutdown mode, the SP6683 discharges the output to ground

and draws less than 1µA current. The SP6683 utilizes 1µF capacitors to deliver up to 200mA

current regulated WLED drive capability. The SP6683 is offered in 10-pin DFN or MSOP

package.

®

TYPICAL APPLICATION SCHEMATIC

FEATURES

■ Drives up to 8 WLEDS

■ Low Profile Inductorless Regulator

■ 1x/1.5x Mode Charge Pump

■ 200mA Output Using 1µF Ceramic Caps

■ +2.7V to +5.5V Input Voltage Range

■ 0.9mA Quiescent Current

■ 1µA Shutdown Current

■ Built-in 1.2MHz Oscillator

■ Programmable Output Current or Voltage

■ PWM Dimming Control via Enable Pin

■ Shutdown to Disconnect Output from Input

via Shutdown

■ Soft Start to limit In-Rush Current

■ Space Saving 10-pin 3 x 3mm DFN Package

APPLICATIONS

■ Mobile Phone

■ PDA

■ Digital Still Camera

■ Digital Camcorder

■ Palmtop Computer

■ Color LCD Module

High Power LED Driver for Parallel Configuration

Preliminary

SP6683

10 Pin DFN

10

9

8

7

6

C2P

C1N

GND

C2N

EN/PWM

1

2

3

4

5

C1P

FB

SP6683

C1P

FB

®

C2P

C1N

GND

C2N

EN/PWM

1

2

3

4

5

10

9

8

7

6

C2

1µF

C4

1µF

C5

1µF

C1

1µF

Lithium-Ion

ENABLE/PWM DIMMING

White

LED

C3 0.1µF

R5

R1

R5

1M

Now Available in Lead Free Packaging