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S P 6 6 8 2
H i g h E f f i c i e n c y W h i t e L E D C h a r g e P u m p R e g u l a t o r
February 2009
GENERAL DESCRIPTION
The SP6682 is a current regulated charge
pump ideal for converting a Li-Ion battery
input for driving white LEDs used in
backlighting color displays or cell phone
camera flash applications.
The charge pump automatically switches
between x1.5 and x2 modes based on the
program-mable VMODE voltage, providing
improved efficiency over traditional methods
using charge pump doubler followed by LDO.
This input voltage threshold can be externally
programmed by a resistor divider network for
optimized efficiency at specific output voltages
and currents.
The SP6682 operates with an internal 600kHz
clock, which reduces switching noise and
improves V OUT ripple. Output current or
voltage can be accurately regulated by
modulating the switcher between the charge
pump and output capacitor. In shutdown
mode, the IC disconnects the output from the
input and draws less than 1.5 μ A current.
The SP6682 is offered in a 10-pin MSOP
package, and a small 10-Pin DFN Package.
Rev. 2.0.0
APPLICATIONS
? Mobile Phones & PDAs
? 3.3V to 5V Conversion
? Palmtop Computers
? Color LCD Modules
FEATURES
? 200mA Output Current
? Low Profile Inductorless Regulator
? 600KHz Oscillator
? x1.5 and x2 Conversion Modes
? 2.7V to 5.5V Input Voltage Range
? Fast Turn-on Time 175μs
? 1mA Quiescent Current
? Adjustable Output Current and Voltage
? PWM Dimming Control
? True Shutdown Disconnect
? Soft Start
? 10-pin MSOP and 10-pin DFN Packages
TYPICAL APPLICATION DIAGRAM
Fig. 1: SP6682 LCD Backlighting Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
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相关代理商/技术参数
SP6682ER 制造商:Exar Corporation 功能描述:Driver, Other
SP6682ER/TR 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Efficiency Charge Pump Regulator for White LEDs
SP6682ER-L 功能描述:电荷泵 White LEDs RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube
SP6682ER-L/TR 功能描述:电荷泵 High Efficiency for White LEDs RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube
SP6682EU 制造商:Exar Corporation 功能描述:Driver, Other
SP6682EU/TR 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Efficiency Charge Pump Regulator for White LEDs
SP6682EU-L 功能描述:电荷泵 2.5V-16V 600kHz temp -40C to 85C RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube
SP6682EU-L/TR 功能描述:电荷泵 High Efficiency for White LEDs RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube