SP6685ER-L/TR 查看數據表（PDF） - Exar Corporation

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SP6685ER-L/TR

700mA Buck/Boost Charge Pump LED Driver

Exar Corporation 

June 2009

SP6685

700mA Buck/Boost Charge Pump LED Driver

Rev. 2.0.0

GENERAL DESCRIPTION

The SP6685 is a current-regulated charge

pump ideal for powering high brightness LEDs

for camera flash applications.

The charge pump can be set to regulated two

current levels for FLASH and TORCH modes.

The SP6685 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 SP6685 is designed to operate from a

single cell lithium-ion battery or fixed 3.3V or

5.0V power rails and is available in a RoHS

compliant, “green”/halogen free space saving

10-pin 3mmx3mm DFN package.

APPLICATIONS

• White LED Torch/Flash for Cell Phone,

DSCs and Camcorders

• White LED Backlighting

• Generic Lighting/Flash Application

• General Purpose High Current Boost

FEATURES

• Output Current up to 700mA

• Up to 94% Efficiency in Torch Mode

• Minimum External Components:

No Inductor

• Adjustable FLASH Mode Current

• 1x and 2x Charge Pump Operation

• 2.4MHz High Frequency Operation

• IQ < 1µA in Shutdown

• Built-In Soft Start Limit Inrush Current

• Output Overvoltage Protection

• Over current/Temperature Protection

• 10pin 3x3mm DFN Package

TYPICAL APPLICATION DIAGRAM

Fig. 1: SP6685 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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