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HT7L2103

更新时间： 2022-11-07 20:29:17

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		驱动器
页数	文件大小	规格书
11页	906K
描述
Anti-EMI, High Efficiency Dimmable LED Lighting Driver with Primary-Side Constant Control and Green Mode

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HT7L2103 数据手册

HT7L2103

Application Information

Operation Overview

TheꢀHT7L2013ꢀisꢀaꢀhighlyꢀfunctionallyꢀintegratedꢀ

PWMꢀcontrollerꢀforꢀLEDꢀlightingꢀandꢀisꢀoptimizedꢀtoꢀ

restrictꢀEMI.ꢀTheꢀdeviceꢀusesꢀaꢀprimaryꢀsideꢀfeedbackꢀ

designꢀwithꢀconstantꢀcurrentꢀcontrolꢀtoꢀreduceꢀexternalꢀ

componentꢀrequirementsꢀandꢀtoꢀmaintainꢀcurrentꢀ

accuracy.ꢀItꢀisꢀrecommendedꢀforꢀE27ꢀretrofitꢀlampꢀ

use.ꢀTheꢀPWMꢀdimmingꢀrangeꢀisꢀ1%ꢀtoꢀ99%ꢀandꢀ

providesꢀlessꢀthanꢀ1%ꢀdimmingꢀprecision.ꢀItsꢀinternalꢀ

featuresꢀincludeꢀGreenꢀmodeꢀ(Non-Acoustic-Noise),ꢀ

internalꢀslopeꢀcompensation,ꢀhighꢀefficiencyꢀunderꢀ

differentꢀloadꢀconditionsꢀwithinꢀaꢀwideꢀoperatingꢀ

temperatureꢀrangeꢀofꢀ-40°Cꢀtoꢀ85°C.ꢀTheꢀdevicesꢀ

alsoꢀincludesꢀaꢀrangeꢀofꢀprotectionꢀfunctions,ꢀSCP,ꢀ

OVP,ꢀUVLO,ꢀcurrentꢀlimit,ꢀLEB,ꢀsoftꢀstart,ꢀOTPꢀforꢀ

internalꢀthermalꢀsensingꢀ,notꢀonlyꢀenhanceꢀsystemꢀ

excellentꢀperformance,ꢀbutꢀalsoꢀensureꢀhighꢀstabilityꢀ

ofꢀꢀtheꢀwholeꢀcircuitꢀapplicationꢀevenꢀunderꢀextremeꢀ

environmentalꢀconditionsꢀsuchꢀasꢀhighꢀtemperatureꢀorꢀ

highꢀEMIꢀlevels.

Figure 8. Oscillator Behavior Compared with

Advanced Precision Oscillator for

Green-Mode Switching and Non-Acoustic

Noise Requirement

HT7L2103 and Other Green Mode PWM Controller

Frequency Jitter for EMI Restriction

AꢀTrimmedꢀPrecisionꢀGreenꢀModeꢀOscillatorꢀisꢀ

implementedꢀinꢀtheꢀdeviceꢀtoꢀenhanceꢀtheꢀconversionꢀ

efficiencyꢀunderꢀlightꢀloadꢀconditions.ꢀAsꢀFigureꢀ7ꢀ

shows,ꢀtheꢀefficiencyꢀdifferenceꢀbetweenꢀlightꢀloadsꢀ

andꢀheavyꢀloadsꢀisꢀlessꢀthanꢀ1%,ꢀwhileꢀtheꢀaverageꢀ

efﬁciencyꢀisꢀonlyꢀ89.5%,ꢀtheꢀpeakꢀefﬁciencyꢀisꢀ90%.

EMIꢀrestrictionꢀisꢀaccomplishedꢀusingꢀaꢀFrequencyꢀ

Jitterꢀfunction,ꢀwhichꢀspreadsꢀtheꢀenergyꢀoverꢀaꢀwiderꢀ

frequencyꢀrangeꢀthanꢀtheꢀbandwidthꢀmeasuredꢀbyꢀ

theꢀEMIꢀtestꢀequipment.ꢀAnꢀinternalꢀFrequencyꢀJitterꢀ

circuitꢀchangesꢀtheꢀswitchingꢀfrequencyꢀbetweenꢀ+4%ꢀ

andꢀ-4%ꢀofꢀtheꢀcentralꢀfrequencyꢀwithꢀaꢀperiodꢀofꢀ

4ms.

Figure 7 Efﬁciency Performance between

Light-Load and Heavy-Load

TheꢀGreenꢀModeꢀOscillatorꢀtypesꢀsuppliedꢀbyꢀotherꢀ

PWMꢀControllerꢀprovidersꢀareꢀplaguedꢀbyꢀAcoustic-

Noiseꢀproblems.ꢀThisꢀisꢀbecause,ꢀunderꢀlightꢀloadꢀ

conditions,ꢀtheꢀfrequencyꢀwillꢀkeepꢀdecreasingꢀ

throughꢀtheꢀHumanꢀAcousticꢀRangeꢀ(fromꢀ20Hzꢀ

toꢀ20kHz),ꢀandꢀtheseꢀaudioꢀfrequenciesꢀmayꢀcreateꢀ

audibleꢀnoiseꢀinꢀtheꢀtransformer.ꢀHoltek’sꢀHT7L2103ꢀ

patentedꢀGreenꢀModeꢀOscillatorꢀdesignedꢀusingꢀanꢀ

advancedꢀNon-AcousticꢀNoiseꢀstructureꢀpreventsꢀ

theꢀgenerationꢀofꢀfrequenciesꢀinꢀtheꢀaudioꢀfrequencyꢀ

band,ꢀthusꢀeliminatingꢀanyꢀtransformerꢀnoise.

Figure 9 Frequency Jitter Function Spreads Energy

Over a Period to Accomplish EMI Restraining

Rev. 1.00

November 04, 2011

1 2 3 456 7 8...11

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HT7L4091	HOLTEK	Universal Step-Down PWM Control For High Brightness LED Lighting Control	获取价格
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HT7L4091-1	HOLTEK	Universal Step-Down PWM Control For High Brightness LED Lighting Control	获取价格
HT7L4091V110	ETC	Universal Step-Down PWM Control For High Brightness LED Lighting Control	获取价格
HT7L5502	HOLTEK	Primary-Side Regulation Dimmable LED Driver with Active PFC	获取价格
HT7L5503	HOLTEK	Primary-Side Regulation Dimmable LED Driver with Active PFC	获取价格

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