HT7L2102 datasheet(1/11 Pages) HOLTEK

номер детали	HT7L2102

подробное описание детали	Anti-EMI, High Efficiency Dimmable LED Lighting Driver with Green Mode and Integrated Protections

PDF	11 Pages

Scroll/Zoom	100%

производитель	HOLTEK [Holtek Semiconductor Inc]

домашняя страница	http://www.holtek.com

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1 / 11 page

Rev. 1.00

1

November 4, 2011

Rev. 1.00

PB

November 04, 2011

HT7L2102

Anti-EMI, High Efficiency Dimmable

LED Lighting Driver with Green Mode

and Integrated Protections

Feature

• FrequencyJitterforEMIRestriction

• IntegratedSoft-StartFunction

• VeryLowOperatingCurrentandStart-upCurrent

(<20mA)forsatisfyingEnergy-Star2.0"No-Load

Mode"(Stand-by)Powerstandard

• ±5%TrimmedOscillatorforPreciseFrequency

• Non-Audible-NoiseGreenModeControlto

maintainefficiencyforbothLightandHeavy

Loads

• LEB(Leading-EdgeBlanking)onCSPin

• InternalSlopeCompensation

• Cycle-by-CycleCurrentLimiting

• Short-Circuit-Protection(SCP)forShort-Circuit

andOver-LoadCondition

• Over-Voltage-Protection(OVP)onVCCPin

• Over-Temperature-Protection(OTP)onTSpinfor

ExternalThermistorSensing

• 1~99%PWMDimmingRange

• 8-pinSOPpackage

Applications

• IsolationAC-DCLEDLighting

• AC-DCSwitchingPowerSupply/Adapter

General Description

TheHT7L2102isanadvanced,highlyintegratedLED

LightingdriverusinganAC-DCisolationtopology.

Thedeviceprovidesmanyprotectionfunctionsand

usesultralowpowercircuitdesign,andisoptimized

torestrictEMI.ByintegratingaNon-AudibleNoise

GreenModeControlStructure,userscanimplement

asinglecircuitfordifferentLEDloadlevelsfor

variousseries/parallelconfigurationsbutstillmaintain

highefficiencyfordifferentloadconditions.This

devicealsointegratesvariousprotectionfunctionsfor

LEDLightingrequirementssuchasCycle-by-Cycle

CurrentLimiting,Short-CircuitProtection(SCP),

Over-VoltageProtection(OVP),Over-Temperature

Protection(OTP)forexternalthermistorsensing,and

aSoft-Startfunctiontoreduceinrushcurrentsduring

LEDpowersysteminitializationforthepreventionof

deviceburn-out.

TheHT7L2102providesa1~99%PWMDimming

Rangewithduty-cyclescaleprecisionlowerthan1%.

Application Circuits

R3

R7

D4

D3

R4

R19

C12

GD

VCC

TS

ISENSE

COMP/FB

C19

GND

RT

Vref

R11

C15

D1

R20

Vout

C14

T1

Q1

U2

U1

C2

BD1

Vac=85V~265V

L

N

1

5

4

3

7

8

Q3

C4

Rts

R28

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