HT7A6005 datasheet(1/11 Pages) HOLTEK

номер детали	HT7A6005

подробное описание детали	Low Power, Wide Temperature Range General Purpose Current Mode PWM Controller

PDF	11 Pages

Scroll/Zoom	100%

производитель	HOLTEK [Holtek Semiconductor Inc]

домашняя страница	http://www.holtek.com

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Rev. 1.10

1

July 17, 2013

Rev. 1.00

PB

July 17, 2013

HT7A6005

Low Power, Wide Temperature Range General

Purpose Current Mode PWM Controller

Feature

• HighPerformance,LowCostCurrentModePWM

ControllerespeciallydesignedforEnergyStar5.0

• VeryLowStartupCurrent(<20μA)andOperating

Current

• High-VoltageCMOSProcesswithExcellentESD

protection(>3KV)

• ±5%TrimmedOscillatorforPreciseFrequency

Control

• LEB(Leading-EdgeBlanking)onCSPin

• InternalSlopeCompensation

• ProgrammableSwitchingFrequency

• InternallyTrimmedReferencewithUVLO(Under

VoltageLockout)

• Cycle-by-CycleCurrentLimiting

Applications

• SwitchingAC-DCAdaptors

• DC-DCSwitchingBuck/BoostConverters

• LEDBacklightsforLCD/LEDTVs

General Description

TheHT7A6005isacontrollerICthatincludesthe

necessaryfeaturestoimplementoff-lineorDC-DC

currentmodecontrolschemeswithaminimalexternal

partscount.Internalcircuitsincludeaspecially

designedMixed-Mode/AnalogInterfaceformulti-

functionandmulti-topologycontrolschemes(DC-DC

Buck/Boost,Off-lineAC-DC),atrimmedoscillator

forpreciseduty-cyclecontrolundervoltagelockout

withastart-upcurrentoflessthan0.5mA,awide

temperaturerange,precisevoltagereference,internal

SlopeCompensationandLeading-EdgeBlanking.

TheHT7A6005featuresbasicsystemprotection

functionssuchasCycle-by-CycleCurrentLimiting

andUnderVoltageLock-Out(UVLO).

AMulti-FunctionPincanbeusedasadimming

functionforLEDdriving,andasaprimaryfeedback

control for Primary-Side Feedback AC-DC

applications.

Application Circuits

GD

VCC

MF

CS

COMP/FB

GND

RT

VREF

2.2kW

0.1mF

470mF/50V

10W

1N4148

20W

0.22W

10kW

IRF540

0.22W

1nF

470kW

33pF

HFB20HJ20C

0.1mF/100V

46mH

2kW

40kW

470mF

/63V

820W

220pF

Vo=55V/75W

VIN=24V

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