SP6683 Datasheet, PDF (1/10 Pages) Sipex Corporation – High Power LED Driver for Parallel Configuration

®
Preliminary
SP6683
High Power LED Driver for Parallel Configuration
FEATURES
■ Drives up to 8 WLEDS
V_OUT 1
10 C2P
■ Low Profile Inductorless Regulator
■ 1x/1.5x Mode Charge Pump
■ 200mA Output Using 1µF Ceramic Caps
■ +2.7V to +5.5V Input Voltage Range
C1P 2
V_IN 3
V_MODE 4
SP6683
10 Pin DFN
9 _C1N
8 _GND
7 _C2N
■ 0.9mA Quiescent Current
FB 5
6 _EN/PWM
■ 1µA Shutdown Current
■ Built-in 1.2MHz Oscillator
Now Available in Lead Free Packaging
■ 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
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
C2
1µF
Lithium-Ion
R1
C1
1µF
R5
R5
ENABLE/PWM DIMMING 1M
®
1 _VOUT
C2P ¹⁰
2 _{C1P SP6683 C1N} 9
3 _VIN
4 _VMODE
5 _FB
GND ⁸
C2N ⁷
6
EN/PWM
C3 0.1µF
C4
1µF _C5
1µF
Date: 07/07/04
SP6683 White LEDs Driver for Parallel Configuration
1
White
LED
© Copyright 2004 Sipex Corporation