SP6686 Datasheet

IC型號：
SP6686
PDF描述：
400mA Buck/Boost Charge Pump LED Driver
文件大小：
262.14KB
PDF頁數(shù)：
13頁
芯片廠家：
SIPEX

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SP6686

400mA Buck/Boost Charge Pump LED Driver

FEATURES

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Output Current up to 480mA

OUT

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Up to 94% Efficiency in Torch Mode

SP6686

GND

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Automatic Softstart limits inrush current

GND

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Adjustable FLASH mode

10 Pin DFN

FLASH

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x1 and x2 Automatic Modes for High Efficiency

SET

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Minimum External Components: No Inductors

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High Frequency Operation: 2.4 MHz

Now Available in Lead Free Packaging

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Low 50mV reference for low loss sensing

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1碌A(chǔ) shutdown current

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PWM Dimming Control

APPLICATIONS

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Automatic switchover between buck/boost

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White LED Torch/Flash for Cell

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Over voltage protection on output

Phones, DSCs, and Camcorders

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Over current/temerature protection

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Generic Lighting/Flash/Strobe

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Low Ripple and EMI

Applications

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Space Saving 10-pin 3mm x 3mm DFN

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White LED Backlighting

Package

DESCRIPTION

The SP6686 is a current regulated charge pump ideal for powering high brightness LEDs for

camera flash applications. The charge pump can be set to regulate two current levels for

FLASH and TORCH modes. The SP6686 automatically switches modes between step-up

and step-down ensuring that LED current does not depend on the forward voltage. A low

current sense reference voltage (50mV) allows the use of small 0603 current sensing

resistors. The SP6686 is offered in 10-pin DFN package.

TYPICAL APPLICATION CIRCUIT

(2.7 - 5.5V)

0.47碌F

TORCH/FLASH

ENABLE

FLASH

OUT

400mA FLASH

OUT

1碌F

WLED

廬

2.2碌F

SP6686 P

GND

SET

106K

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SENSE

0.33

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Date: 03/10/06

SP6686 400mA, Buck/Boost Charge Pump LED Driver

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