SP6699 datasheet(1/12 Pages) EXAR

номер детали	SP6699

подробное описание детали	27V Step Up White LED Driver

PDF	12 Pages

Scroll/Zoom	100%

производитель	EXAR [Exar Corporation]

домашняя страница	http://www.exar.com

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1 / 12 page

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SP

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27

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October 2011

Rev. 2.1.0

Exar Corporation

www.exar.com

48720 Kato Road, Fremont CA 94538, USA

Tel. +1 510 668-7000 – Fax. +1 510 668-7001

GENERAL DESCRIPTION

The SP6699 is an inductor-based DC/DC

converter designed to drive up to five white

LEDs in series for LCD modules and keypad

backlighting functions.

Only one feedback resistor is needed to

control the LED current and obtain the desired

brightness. A 1.0MHz constant frequency PWM

control scheme is used, enabling the usage of

small

external

components.

A

typical

application needs a 1mm tall inductor and a

0.22μF output capacitor. Additionally, the

boost circuit Schottky diode is integrated,

further reducing the overall foot print.

A logic controlled enable pin allows this device

to be placed in a low current consumption

mode of a few microamps. Furthermore, the

SP6699 is equipped with an over voltage

output protection circuit which clamps the

output voltage to 27 volts when any LED fails

or in other abnormal conditions.

The SP6699 is offered in a smal lead free,

RoHS compliant 6-pin SOT23 package.

APPLICATIONS

 LCD Modules

 Keypad Backlighting

 Digital Cameras

 GPS Receivers

 Portable Media Players

FEATURES

 High Output Voltage: Up to 27V

 Drives 2 to 5 LEDs @ 20mA

 High Efficiency up to 84%

 Integrated Schottky Diode

 Fast 1.0MHz Switching Frequency

 200mV Feedback Voltage

 PWM Dimming Capability up to 1KHz

 Over Output Voltage Protection

 Internal Soft Start Circuit

 Small SOT23-6 Package Sub feature

TYPICAL APPLICATION DIAGRAM

Fig. 1: SP6699 Application Diagram

Аналогичный номер детали - SP6699

производитель	номер детали	датащи	подробное описание детали
Exar Corporation	SP6699EK-L-TR	569Kb / 13P	27V Step Up White LED Driver

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Аналогичное описание - SP6699

производитель	номер детали	датащи	подробное описание детали
Allegro MicroSystems	A8431	331Kb / 10P	White LED Driver Constant Current Step-up Converter April 5, 2005
Allegro MicroSystems	A8430	329Kb / 10P	White LED Driver Constant Current Step-up Converter
Silicon Touch Technolog...	PC112	380Kb / 14P	Step Up Converter for White LED Driver
Taiwan Semiconductor Co...	TS1520	1,011Kb / 12P	Step-Up DC-DC Converter, White LED Driver
Monolithic Power System...	MP3389	391Kb / 16P	12?밪tring, Step-up White LED Driver
YOBON TECHNOLOGIES,INC.	YB1518	1Mb / 12P	Step-up DC-DC Converter White LED Driver
STMicroelectronics	STLED25	2Mb / 30P	5 channels step-up white LED driver 11-May-2012
Exar Corporation	SP6699EK-L-TR	569Kb / 13P	27V Step Up White LED Driver
Will Semiconductor Ltd.	WD3139	1Mb / 13P	High Efficiency, 38V Step-Up White LED Driver
SHENZHEN FUMAN ELECTRON...	A3127	191Kb / 7P	Step-up DC/DC converter white LED driver

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