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1、1On-Bright confidentialOn-Bright confidentialLED BLUDriving and Challenge 2On-Bright confidentialOn-Bright confidentialOutline 1.LED to CCFL ReplacementnLED backlight benefits analysisnCCFL/LED market share trend2.Small & Middle Size Driving TopologynLED notebook/NetbooknLED monitornLow-end display3
2、.LED TV Driving Topology4.OB LED Driver Roadmap 5.Q&A3On-Bright confidentialOn-Bright confidentialTV Products Innovations Internet Internet ConnectivityConnectivity3D3DDisplayDisplayHumanHumanInterfaceInterfaceLEDLEDBacklightBacklightTV Products InnovationsTV Products InnovationsLED backlight is ver
3、y hot4On-Bright confidentialOn-Bright confidentialLED Type White LightCurrent Capabilityn Standard LED - drive current 110%)n Light weight and thin profile6On-Bright confidentialOn-Bright confidentialPower Saving of LED BLU n Low drive voltage to ensure safety operationn The relationship between LED
4、 intensity and drive current is linern Lower current is operated to perform the same brightness level that CCFL modulen Power saving of 3050% of CCFL power consumption7On-Bright confidentialOn-Bright confidentialLocal Dimming of TV LED BLU 8On-Bright confidentialOn-Bright confidentialNTSC cover CCFL
5、 78%, WLED 80%, RGB LED 110%)Wide Color Gamut 9On-Bright confidentialOn-Bright confidential NB PC LCD MNT LCD TV Power Saving Light weight Thin profile Small cost premium None Power Saving Dynamic BLU control Cost Reliability Huge LED Amount Thermal compensation Power Saving Thin profile Cost Input/
6、output interfaceAdvantageAdvantageChallengeChallengeLED BLU Market Potential ApplicationApplicationHighLow10On-Bright confidentialOn-Bright confidentialLED BLU Market Share 2008200920102011Share Rate (NB)21.90%66.70%89.40%95.20%Share Rate (MNT)0.30%1.90%18.90%35.10%Share Rate (TV)0.30%2.68%21.26%45.
7、29%n Samsung MP LED TV at 2009, Q2Kick off LED TV marketn Low cost Edge type become main stream Help to rise the share rate from CCFLn Power saving features Easy to meet EPA5.0n Will break 50% share 2012Source: Display Search11On-Bright confidentialOn-Bright confidentialLED Driving Topology-NB 15” p
8、anel for example15” panel for example6 strings, 10 LED per string 20mA6 strings, 10 LED per string 20mAVout 33V, Pout 4WVout 33V, Pout 4WOB3360 FeaturesOB3360 FeaturesBuild-in 60V MOSFETBuild-in 60V MOSFET8 string output8 string outputWith 60mA current capability per stringWith 60mA current capabili
9、ty per string160K/320K/620K/1.2MHz frequency160K/320K/620K/1.2MHz frequency0100% wide range dimming0100% wide range dimming3% channel to channel current matching3% channel to channel current matching12On-Bright confidentialOn-Bright confidentialLED Driving Topology-MNT 24” panel for example (1)24” p
10、anel for example (1)12 strings, 15 LED per string 20mA12 strings, 15 LED per string 20mAVout 50V, Pout 12WVout 50V, Pout 12WOB3362 FeaturesOB3362 Features12 string output12 string outputWith 60mA current capability per stringWith 60mA current capability per string150500kHz frequency150500kHz frequen
11、cy0100% wide range dimming0100% wide range dimming3% channel to channel current matching3% channel to channel current matching24” panel for example (2)24” panel for example (2)12 strings, 15 LED per string 20mA12 strings, 15 LED per string 20mAVout 33V, Pout 4WVout 33V, Pout 4Wparallel connection to
12、 support larger current application13On-Bright confidentialOn-Bright confidentialLED Driving Topology-Low End Display OB337XOB337X0.2V reference benefits efficiency0.2V reference benefits efficiencyInternal burst and external PWM dimmingInternal burst and external PWM dimmingOutput over voltage prot
13、ectionOutput over voltage protectionOB3372OB3372:Boost,DIP8, built in 60V MOSFET:Boost,DIP8, built in 60V MOSFETOB3370NOB3370N:Boost, SOP8, Controller:Boost, SOP8, ControllerOB3370POB3370P:Buck, SOP8, Controller :Buck, SOP8, Controller 26” panel for example (2)26” panel for example (2)Single string,
14、 400mASingle string, 400mAVout 40V, Pout 16WVout 40V, Pout 16W14On-Bright confidentialOn-Bright confidentialLED vs. CCFL Cost Comparison Q3, 2010$USDpremium 28%premium 41%premium 61%premium 43%15On-Bright confidentialOn-Bright confidentialLED TV Market Share Growth Source: Display Search16On-Bright
15、confidentialOn-Bright confidentialLED Backlight for Large Size TV Panel Direct type with Local dimmingDirect type without Local dimmingEdge type backlightHigh Performance Slim ProfileRGB LED / White LED White LED n RGB & Local dimming has power saving and high-CR feature High-end usen Edge type solu
16、tion has low cost feature Main streamDirect Backlight:Better emissionAllowing independently dimming block by blockEdge Backlight:Allowing slim designFewer LED number and lower cost17On-Bright confidentialOn-Bright confidentialLED TV Cost Down Trend Direct typeEdge typeAdvanced edge typeAdvanced edge
17、 type2008200920102011structureDirect typeEdge typeEdge typeEdge type#LED96057640017640 inch LED TV18On-Bright confidentialOn-Bright confidentialLED TV Driving Topology OB3376OB3376Dual channel boost controllerDual channel boost controller150/300kHz switching frequency150/300kHz switching frequencyMu
18、lti chip sync.Multi chip sync.Cost effectiveCost effective42” panel for example42” panel for example4 strings4 strings150mA per string150mA per stringVout 150V, Pout 90WVout 150V, Pout 90W19On-Bright confidentialOn-Bright confidentialLED TV Power Optimize Current SolutionOptimized SolutionReduce DC/
19、DC Booster（Cost）Efficiency improvement20On-Bright confidentialOn-Bright confidentialHeadroom voltage Headroom voltage feedback for efficiency and feedback for efficiency and thermal improvementthermal improvementOn-Bright LED TV Total Solution 21On-Bright confidentialOn-Bright confidential作者简介：作者简介：
20、 张昌山先生毕业于西南交通大学张昌山先生毕业于西南交通大学电子工程系，长期以来一直致力于背光电子工程系，长期以来一直致力于背光驱动市场的产品规划及技术研究，张先驱动市场的产品规划及技术研究，张先生于生于2005年正式加入昂宝电子（上海）年正式加入昂宝电子（上海）有限公司，期间一直担任系统部总监，有限公司，期间一直担任系统部总监，全权负责公司电管理芯片之应用团队及全权负责公司电管理芯片之应用团队及管理。管理。 张昌山先生在相关领域拥有丰富张昌山先生在相关领域拥有丰富的实际应用经验，在的实际应用经验，在LED照明驱动、背照明驱动、背光驱动均有自己独到的见解，张先生在光驱动均有自己独到的见解，张先生在该领域还拥有多项国内外专利。该领域还拥有多项国内外专利。
