HT7939A datasheet(1/13 Pages) HOLTEK

tên linh kiện	HT7939A

Giải thích chi tiết về linh kiện	Performance White LED Driver

PDF	13 Pages

Scroll/Zoom	100%

nhà sản xuất	HOLTEK [Holtek Semiconductor Inc]

Trang chủ	http://www.holtek.com

Logo

1 / 13 page

Rev. 1.00

1

April 19, 2012

Rev. 1.00

PB

April 19, 2012

HT7939A

High Current and

Performance White LED Driver

Feature

• Inputvoltagerange:2.6V~5.5V

• Highefficiency-upto90%

• IntegratedN-chMOSFET

• Candriveupto39WLEDsfroma5Vinput

• Lowstandbycurrent:0.1mA(typ.)

• Built-inOVP,OCP,OTP,UVLOprotection

• ENpindimmingfrequencyupto200kHz

• 1.2MHzfixedswitchingfrequency

• SOT23-6package

Applications

• Displaybacklighting

– Automatic

– DVDplayer

– Digitalphotoframe

– Handheldcomputer

General Description

TheHT7939Aisahighefficiencyboostconverter

fordrivingmultipleWhiteLEDsusingcurrentmode

operation.Thedeviceisdesignedtodriveupto39

WhiteLEDsfroma5Vpowersupply.TheWhite

LEDcurrentissetupusinganexternalcurrentsetting

resistor,whichhasalowfeedbackvoltageof0.2Vto

minimiseresistorpowerlossesandthusimproving

efficiency.

TheHT7939Ahasadimmingfrequencyofupto

200kHz,whichhasexcellentlinearperformance

overthisdimmingfrequencyrange.Theovervoltage

functionpreventsdevicedamagebyturningoffthe

convertershouldtheLEDloadbecomeopencircuit.

Thedevicealsoincludesovercurrentprotection,over

temperatureprotectionandundervoltageprotection

preventingdamagetothedeviceshouldtheoutputbe

overloaded.

Selection Guide

Part No.

Package

Marking

HT7939A

SOT23-6

39A-1 (OVP=17.6V)

39A-2 (OVP=32.0V)

Note:Bothleadfreeandgreencompounddevicesareavailable.

Số phần tương tự - HT7939A

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Holtek Semiconductor In...	HT7939A	3Mb / 12P	High Current and Performance White LED Driver

More results

Mô tả tương tự - HT7939A

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Holtek Semiconductor In...	HT7939	714Kb / 13P	High Current and Performance White LED Driver November 3, 2009
	HT7938	469Kb / 11P	High Current and Performance White LED Driver
	HT7939	320Kb / 13P	High Current and Performance White LED Driver
	HT7938A	2Mb / 13P	Performance White LED Driver
	HT7938A	2Mb / 13P	High Current and Performance White LED Driver
	HT7938	914Kb / 11P	High Current and Performance White LED Driver June 25, 2016
	HT7938A	1Mb / 12P	High Current and Performance White LED Driver
	HT7939	2Mb / 12P	High Current and Performance White LED Driver
	HT7939A	3Mb / 12P	High Current and Performance White LED Driver
uPI Group Inc.	UP6007	599Kb / 10P	43V High Performance White LED Driver

More results

HT7939A bảng dữ liệu(PDF) 1 Page - Holtek Semiconductor Inc

HT7939A bảng dữ liệu(HTML) 1 Page - Holtek Semiconductor Inc

Số phần tương tự - HT7939A

Mô tả tương tự - HT7939A

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13

bảng dữ liệu tải về

Link URL