HT7963 datasheet(1/11 Pages) HOLTEK

tên linh kiện	HT7963

Giải thích chi tiết về linh kiện	LED Backlight Driver

PDF	11 Pages

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nhà sản xuất	HOLTEK [Holtek Semiconductor Inc]

Trang chủ	http://www.holtek.com

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1 / 11 page

Rev. 1.00

1

August 14, 2015

Rev. 1.00

PB

August 14, 2015

HT7963

LED Backlight Driver

Features

• IntegratedhighpowerboostDC-DCcontroller

• Wideinputvoltagerangefrom9Vto30V

• HighVoltageGate-DriveprovideslowerRDS(ON)

andhigherefficiencies

• Dimmingfrequencyfrom100Hzto1kHz

• 0.3VLEDfeedbackcurrentsensingvoltagewith

±3%tolerance

• Deviceprotectionfeaturesinclude:

Soft-start,OCP,UVLO,OVP,OTPandoutput

shortprotection–OSP

• LEDprotection:LEDOpen/ShortProtection

• Packagetype:8-pinSOP

Applications

• LEDBacklightingforLCDTV/Monitor

• LEDlighting

General Description

TheHT7963isahighefficiencyboostconverterwith

afixedoscillatorfrequencyforLEDbacklightingand

LEDlightingapplication.ThewhiteLEDcurrentis

setupusinganexternalcurrentsettingresistor,which

hasalowfeed-backvoltageofonly0.3V.TheDIM

inputallowsawiderangeofdimmingcontrolforLED

backlightingorLEDlighting.Thedeviceoffersafull

rangeofprotectionfunctionssuchaspowerMOSFET

overcurrentprotection(OCP),ICpowersupplyunder

voltagelockout(UVLO),over-voltageprotection

(OVP),outputvoltageshortcircuitprotection(OSP)

andovertemperatureprotection(OTP).

Typical Application Circuit

DIM

GND

CS

OVP

DRV

FB

COMP

VIN

1

8

6

3

2

4

7

5

HT7963

VIN = 12V~24V

220uF

L

47uH

CIN

RC

47KΩ

RCS

D1

47uF

COUT

RFB

VOUT

optional

R1

100Ω

470pF

CFB

optional

100Ω

51Ω

0.1uF

CC

33nF

10kΩ

10pF

PWM

0.3V

ILED=

RFB

R2

Note:TheVOUT/VINratioissuggestedtobelowerthan5togainbetterdimminglinearity.

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