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廬

Preliminary

SP6683

High Power LED Driver for Parallel Configuration

FEATURES

V

OUT

1

10

C2P

鈻?/div>

Drives up to 8 WLEDS

鈻?/div>

Low Profile Inductorless Regulator

C1P

2

SP6683

9

C1N

鈻?/div>

1x/1.5x Mode Charge Pump

8

GND

V

IN

3

鈻?/div>

200mA Output Using 1碌F Ceramic Caps

10 Pin DFN

7

C2N

V

MODE

4

鈻?/div>

+2.7V to +5.5V Input Voltage Range

6

EN/PWM

FB

5

鈻?/div>

0.9mA Quiescent Current

鈻?/div>

1碌A(chǔ) Shutdown Current

Now Available in Lead Free Packaging

鈻?/div>

Built-in 1.2MHz Oscillator

鈻?/div>

Programmable Output Current or Voltage

APPLICATIONS

鈻?/div>

PWM Dimming Control via Enable Pin

鈻?/div>

Mobile Phone

鈻?/div>

Shutdown to Disconnect Output from Input

鈻?/div>

PDA

via Shutdown

鈻?/div>

Digital Still Camera

鈻?/div>

Soft Start to limit In-Rush Current

鈻?/div>

Digital Camcorder

鈻?/div>

Space Saving 10-pin 3 x 3mm DFN Package

鈻?/div>

Palmtop Computer

鈻?/div>

Color LCD Module

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鈥檚 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 1碌A(chǔ) current. The SP6683 utilizes 1碌F 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

C2

1碌F

廬

1 V

OUT

2 C1P

Lithium-Ion

C1

1碌F

R1

C2P 10

SP6683

C1N 9

3

8

V

IN

GND

4

7

V

MODE

C2N

5

6

FB

EN/PWM

C4

1碌F

C5

1碌F

White

LED

R5

C3 0.1碌F

ENABLE/PWM DIMMING

R5

1M

Date: 07/07/04

SP6683 White LEDs Driver for Parallel Configuration

1

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