1 On-Bright confidential LED BLU Driving and Challenge Q4, 2010 Allen Zhang

1On-Bright confidentialOn-Bright confidential

LED BLULED BLU

Driving and ChallengeDriving and ChallengeQ4 2010Q4 2010

Allen ZhangAllen Zhang


Outline Outline

1 LED to CCFL Replacement

LED backlight benefits analysis

CCFLLED market share trend

2 Small amp Middle Size Driving Topology

LED notebookNetbook

LED monitor

Low-end display

3 LED TV Driving Topology

4 OB LED Driver Roadmap

5 QampA


TV Products Innovations TV Products Innovations

Internet Internet ConnectivityConnectivity

3D3DDisplayDisplay

HumanHumanInterfaceInterface

LEDLEDBacklightBacklight

TV Products InnovationsTV Products Innovations

LED backlight is very hot


LED Type LED Type W

hite

Lig

ht

Current Capability Standard LED - drive current lt50mA

High current LED - drive current 50-150mA

High power LED - drive current 150-1000mA+

Color White LEDs

Red Green and Blue LEDs (Combined white)

Forward voltage depends on color Red ~2V Green ~35V BlueWhite ~35-4V


Benefits of LED Backlight Benefits of LED Backlight

Power saving (30~40 saving for 12~14rdquo NB)

Longer life time (+50000 hrs vs ~20000hrs of CCFL)

0~100 wide dimming range (up to 20KHz PWM dimming audio noise free)

Low voltage driver reduces complexity power design

Environmental friendly (CCFL contains Hg)

Local dimming for power saving and higher CR (Large size direct type backlight only)

Wide color gamut (NTSC CCFL ~78 WLED ~80 RGB LED gt110)

Light weight and thin profile


Power Saving of LED BLU Power Saving of LED BLU

Low drive voltage to ensure safety operation

The relationship between LED intensity and drive current is liner

Lower current is operated to perform the same brightness level that CCFL module

Power saving of 30~50 of CCFL power consumption


Local Dimming of TV LED BLU Local Dimming of TV LED BLU


NTSC coverbull CCFL ~78 bull WLED ~80 bull RGB LED gt110)

Wide Color Gamut Wide Color Gamut


NB PC

LCD MNT

LCD TV

bull1048707 Power Savingbull1048707 Light weightbull1048707 Thin profilebull Small cost premium

bull1048707 None

bull1048707 Power Savingbull1048707 Dynamic BLU control

bull1048707 Costbull1048707 Reliabilitybull1048707 Huge LED Amountbull Thermal compensation

bull1048707 Power Savingbull Thin profile

bull1048707 Costbull1048707 Inputoutput interface

AdvantageAdvantage ChallengeChallenge

LED BLU Market Potential LED BLU Market Potential

ApplicationApplication

High

Low


LED BLU Market Share LED BLU Market Share

0 00

20 00

40 00

60 00

80 00

100 00

2008 2009 2010 20112008 2009 2010 2011

Share Rate (NB) 2190 6670 8940 9520

Share Rate (MNT) 030 190 1890 3510

Share Rate (TV) 030 268 2126 4529

Samsung MP LED TV at 2009 Q2Kick off LED TV market

Low cost Edge type become main stream Help to rise the share rate from CCFL

Power saving features Easy to meet EPA50

Will break 50 share ~2012Source Display Search


LED Driving Topology-NB LED Driving Topology-NB

6 X 10 LED

20mA

15rdquo panel for example15rdquo panel for example6 strings 10 LED per string 20mA6 strings 10 LED per string 20mAVout ~33V Pout ~4WVout ~33V Pout ~4W

OB3360 FeaturesOB3360 FeaturesBuild-in 60V MOSFETBuild-in 60V MOSFET8 string output8 string outputWith 60mA current capability per stringWith 60mA current capability per string160K320K620K12MHz frequency160K320K620K12MHz frequency0~100 wide range dimming0~100 wide range dimming3 channel to channel current matching3 channel to channel current matching

OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH

LED Driving Topology-MNT LED Driving Topology-MNT

2 X 15 LED

100mA

12 X 15 LED

20mA24rdquo panel for example (1)24rdquo panel for example (1)12 strings 15 LED per string 20mA12 strings 15 LED per string 20mAVout ~50V Pout ~12WVout ~50V Pout ~12W

OB3362 FeaturesOB3362 Features12 string output12 string outputWith 60mA current capability per stringWith 60mA current capability per string150~500kHz frequency150~500kHz frequency0~100 wide range dimming0~100 wide range dimming3 channel to channel current matching3 channel to channel current matching

24rdquo panel for example (2)24rdquo panel for example (2)12 strings 15 LED per string 20mA12 strings 15 LED per string 20mAVout ~33V Pout ~4WVout ~33V Pout ~4W

parallel connection to support larger current application


OB3372GND

VDD

DIM

VIN

LED Driving Topology-Low End Display LED Driving Topology-Low End Display

OB337XOB337X02V reference benefits efficiency02V reference benefits efficiencyInternal burst and external PWM dimmingInternal burst and external PWM dimmingOutput over voltage protectionOutput over voltage protection

OB3372OB3372BoostDIP8 built in 60V MOSFETBoostDIP8 built in 60V MOSFETOB3370NOB3370NBoost SOP8 ControllerBoost SOP8 ControllerOB3370POB3370PBuck SOP8 Controller Buck SOP8 Controller

26rdquo panel for example (2)26rdquo panel for example (2)Single string 400mASingle string 400mAVout ~40V Pout ~16WVout ~40V Pout ~16W

All strings parallel connection


LED vs CCFL Cost Comparison LED vs CCFL Cost Comparison

66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43


LED TV Market Share Growth LED TV Market Share Growth

20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70

Samsung LG Sony Toshiba Sharp Vizio

2010 2011

Source Display Search


LED Backlight for Large Size TV Panel LED Backlight for Large Size TV Panel

Direct type with Local dimming

Direct type without Local dimming

Edge type backlight

High Performance Slim Profile

RGB LED White LED White LED

RGB amp Local dimming has power saving and high-CR feature High-end use

Edge type solution has low cost feature Main stream

Direct BacklightBetter emission

Allowing independently dimming block by block

Edge BacklightAllowing slim design

Fewer LED number and lower cost


LED TV Cost Down Trend LED TV Cost Down Trend

Direct type Edge type Advanced edge type Advanced edge type

2008 2009 2010 2011

structure Direct type Edge type Edge type Edge type

LED 960 576 400 176

40 inch LED TV


LED TV Driving Topology LED TV Driving Topology

OB3376OB3376Dual channel boost controllerDual channel boost controller150300kHz switching frequency150300kHz switching frequencyMulti chip syncMulti chip syncCost effectiveCost effective

42rdquo panel for example42rdquo panel for example4 strings4 strings150mA per string150mA per stringVout ~150V Pout ~90WVout ~150V Pout ~90W

150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2


LED TV Power Optimize LED TV Power Optimize

LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution

bullReduce DCDC Booster （ Cost ）bullEfficiency improvement


Headroom voltage Headroom voltage feedback for efficiency feedback for efficiency and thermal improvementand thermal improvement

On-Bright LED TV Total Solution On-Bright LED TV Total Solution

TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203

LLC ControllerComing Soon

LED DriverOB3368 (Q1 2011)

Flyback ControllerOB2273

Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input


作者简介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驱动市场的产品规划及技术研究张先生于 2005 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全权负责公司电管理芯片之应用团队及管理张昌山先生在相关领域拥有丰富的实际应用经验在 LED 照明驱动背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


Outline Outline

1 LED to CCFL Replacement

LED backlight benefits analysis

CCFLLED market share trend

2 Small amp Middle Size Driving Topology

LED notebookNetbook

LED monitor

Low-end display

3 LED TV Driving Topology

4 OB LED Driver Roadmap

5 QampA




3D3DDisplayDisplay






LED Type LED Type W

hite

Lig

ht




Color White LEDs

























NB PC

LCD MNT

LCD TV


bull1048707 None








High

Low



0 00

20 00

40 00

60 00

80 00

100 00

2008 2009 2010 20112008 2009 2010 2011

Share Rate (NB) 2190 6670 8940 9520

Share Rate (MNT) 030 190 1890 3510

Share Rate (TV) 030 268 2126 4529







6 X 10 LED

20mA



OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input






3D3DDisplayDisplay






LED Type LED Type W

hite

Lig

ht




Color White LEDs

























NB PC

LCD MNT

LCD TV


bull1048707 None








High

Low



0 00

20 00

40 00

60 00

80 00

100 00

2008 2009 2010 20112008 2009 2010 2011

Share Rate (NB) 2190 6670 8940 9520

Share Rate (MNT) 030 190 1890 3510

Share Rate (TV) 030 268 2126 4529







6 X 10 LED

20mA



OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input




LED Type LED Type W

hite

Lig

ht




Color White LEDs

























NB PC

LCD MNT

LCD TV


bull1048707 None








High

Low



0 00

20 00

40 00

60 00

80 00

100 00

2008 2009 2010 20112008 2009 2010 2011

Share Rate (NB) 2190 6670 8940 9520

Share Rate (MNT) 030 190 1890 3510

Share Rate (TV) 030 268 2126 4529







6 X 10 LED

20mA



OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input

























NB PC

LCD MNT

LCD TV


bull1048707 None








High

Low



0 00

20 00

40 00

60 00

80 00

100 00

2008 2009 2010 20112008 2009 2010 2011

Share Rate (NB) 2190 6670 8940 9520

Share Rate (MNT) 030 190 1890 3510

Share Rate (TV) 030 268 2126 4529







6 X 10 LED

20mA



OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input















NB PC

LCD MNT

LCD TV


bull1048707 None








High

Low



0 00

20 00

40 00

60 00

80 00

100 00

2008 2009 2010 20112008 2009 2010 2011

Share Rate (NB) 2190 6670 8940 9520

Share Rate (MNT) 030 190 1890 3510

Share Rate (TV) 030 268 2126 4529







6 X 10 LED

20mA



OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input









NB PC

LCD MNT

LCD TV


bull1048707 None








High

Low



0 00

20 00

40 00

60 00

80 00

100 00

2008 2009 2010 20112008 2009 2010 2011

Share Rate (NB) 2190 6670 8940 9520

Share Rate (MNT) 030 190 1890 3510

Share Rate (TV) 030 268 2126 4529







6 X 10 LED

20mA



OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input







NB PC

LCD MNT

LCD TV


bull1048707 None








High

Low



0 00

20 00

40 00

60 00

80 00

100 00

2008 2009 2010 20112008 2009 2010 2011

Share Rate (NB) 2190 6670 8940 9520

Share Rate (MNT) 030 190 1890 3510

Share Rate (TV) 030 268 2126 4529







6 X 10 LED

20mA



OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input




NB PC

LCD MNT

LCD TV


bull1048707 None








High

Low



0 00

20 00

40 00

60 00

80 00

100 00

2008 2009 2010 20112008 2009 2010 2011

Share Rate (NB) 2190 6670 8940 9520

Share Rate (MNT) 030 190 1890 3510

Share Rate (TV) 030 268 2126 4529







6 X 10 LED

20mA



OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input





0 00

20 00

40 00

60 00

80 00

100 00

2008 2009 2010 20112008 2009 2010 2011

Share Rate (NB) 2190 6670 8940 9520

Share Rate (MNT) 030 190 1890 3510

Share Rate (TV) 030 268 2126 4529







6 X 10 LED

20mA



OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input





6 X 10 LED

20mA



OB3360GND

END

DIM

VIN


OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input




OB3362GND

END

DIM

VIN

12CH


2 X 15 LED

100mA

12 X 15 LED






OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input




OB3372GND

VDD

DIM

VIN








66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input





66

41

38

22

95

66

54

28

0 50 100 150

55

46

40

32

CCFL LED

Q3 2010

$USD

｝ premium 28

｝ premium 41

｝ premium 61

｝ premium 43



20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input





20 18

30

40

20

4550 50

62

4034

60

0

10

20

30

40

50

60

70


2010 2011






Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input







Edge type backlight












2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input






2008 2009 2010 2011


LED 960 576 400 176

40 inch LED TV





150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input







150mA

OB3376GND

END

DIM

100V

100V

VDD

OB3376GND

END

DIM

100V

100V

VDD

SYNC

SYNC

FB1FB2

FB1FB2



LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input





LLC

PFC

Standby Power

Digital amp Audio

DCDCBooster

LED Balance

LLC

PFC

Flyback

Digital amp Audio

LED Balance

Standby

DCDCReduced

Current S

olution

Optimized Solution





TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input






TM PFCOB6563

CCM PFCOB6573

QR FlybackOB2203




Lower Standby

24V2A for audio

5V3A for system

5V1A for standby

AC input





Documents

1 On-Bright confidential LED BLU Driving and Challenge Q4, 2010 Allen Zhang