SP6682_06 Datasheet

IC型號(hào)：
SP6682_06
PDF描述：
High Efficiency Charge Pump Regulator for White LEDs
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505.84KB
PDF頁數(shù)：
12頁
芯片廠家：
SIPEX

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SP6682

High Ef鏗乧iency Charge Pump

Regulator for White LEDs

FEATURES

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Ideal For White LED Driver

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Low Profile, Inductorless Regulator

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Output Current up to 200mA

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X1.5 and X2 Modes for Highest Efficiency

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+2.7V to +5.5V Input Voltage Range

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Fast Turn-On Time, 175碌S

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1mA Quiescent Current

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<1.5碌A(chǔ) Shutdown Current

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600kHz Oscillator

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Programmable Output Current or Voltage

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PWM Dimming Control with Enable Pin

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Shutdown to Disconnect Output from Input

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Soft Start to Eliminate In-Rush Current

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Industry Standard 10-pin MSOP Package

and Small 10-pin DFN Package

OUT

C1P

MODE

C2P

C1N

GND

C2N

EN/PWM

SP6682

10 Pin DFN

Now Available in Lead Free Packaging

APPLICATIONS

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Next Generation Mobile Phones

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PDAs

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3.3V to 5.0V Conversion

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Palmtop Computers

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Color LCD Modules

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 V

MODE

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碌A(chǔ) current. The SP6682 is offered in a 10-pin MSOP package, and

a small 10-Pin DFN Package.

TYPICAL APPLICATION SCHEMATIC

LCD BACKLIGHT

APPLICATION

2.7 - 4.2V

0.1碌F

2.2碌F

廬

Lithium-Ion

2.2碌F

C2P 10

SP6682

C1N 9

GND

MODE

C2N

EN/PWM

1 V

OUT

2 C1P

2.2碌F C5

2.2碌F

White

LED

ENABLE/PWM DIMMING

Date: 7/19/06 Rev

SP6682 High Ef鏗乧iency Charge Pump Regulator for White LEDs

漏 2006 Sipex Corporation

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