HT7465 datasheet(1/11 Pages) HOLTEK

tên linh kiện	HT7465

Giải thích chi tiết về linh kiện	2A Step-Down DC to DC Converter

PDF	11 Pages

Scroll/Zoom	100%

nhà sản xuất	HOLTEK [Holtek Semiconductor Inc]

Trang chủ	http://www.holtek.com

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Rev. 1.00

1

September 02, 2011

Rev. 1.00

PB

September 02, 2011

HT7465

2A Step-Down DC to DC Converter

Feature

• Inputvoltagerange:4.75Vto24V

• Variableoutputvoltagerange:0.92Vto20V

• 2Aoutputcurrent

• Efficiencyupto92%

• Fixed380kHzoperatingfrequency

• 20mAshutdowncurrent

• InternalpowerMOSFETswitch

• StableoperationusinglowESRceramiccapacitors

• Overtemperatureprotection

• Cycle-by-cycleovercurrentprotection

• Soft-startfunction

• Undervoltagelockoutprotection

• 8-pinSOPand10-pinMSOPpackage

Applications

• Batterychargers

• Distributedpowersystems

• LEDpowersupplies

• DSLmodems

• Linearregulatorprepowerprocessing

• Set-Top-Boxes,DVDplayers,LCDdisplays

General Description

TheHT7465isa2Ahighefficiencystep-downDC-

DCconverterwhichincludesafullyintegratedMOS

powertransistor.Thedeviceusesacurrent-mode

controloperatingmethodologyandcanoperateovera

wideinputvoltagerangeof4.75Vto24Vforwhichit

canprovideastableadjustableoutputvoltage.

Thedeviceincludesovertemperatureprotection,

overcurrentprotectionandundervoltagelockout

protection,featureswhichcombinetopreventdevice

damageduetooverloadconditions.Initsshutdown

modetheregulatordrawsamere20uAofsupply

current.

Thedeviceisavailablein8-pinSOPand10-pin

MSOPpackagetypesandprovidesaverycompact

system solution with a minimum of external

components.

Application Circuit

B230A

VIN

EN

SS

GND

COMP

HT7465

BS

SW

FB

22uF

10uF

L

10nF

R2

R1

VIN

VOUT













+

×

=

2

1

R

V

FB

OUT

4.75~24V

C4

C1

C2

C3

R3

C6

C5

Efficiency vs Output Current

Số phần tương tự - HT7465

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Số phần tương tự - HT7465

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