TI LED Lighting Solution Overview - Texas Instruments€¦ · Agenda • Basics of LEDs • AC/DC LED Lighting Solutions – Residential and retrofit lighting driver solutions TI

TI LED Lighting Solution Overview

Daniel Gomez

FAE Avnet

Agenda

• Basics of LEDs

• AC/DC LED Lighting Solutions

– Residential and retrofit lighting driver solutions

TI Confidential2

– Residential and retrofit lighting driver solutions

• TPS92xxx based LED lighting drivers

– Commercial lighting driver solutions

• UCC28810EVM-002 based LED lighting driver

– Outdoor and infrastructure lighting driver solutions

• SIMPLEDrive (UCC28810EVM-003) multi-string driver

The Basics of LEDs

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Why do LEDs need Drivers?

• LEDs are low DC voltage

devices

• Most LEDs are relatively low

current devices (less than 1A)

• LED light modules consist of a

combination or series and

parallel strings

• Control is needed for LED

current regulation and dimming

functions

• Hence LED lighting luminaires

need Drivers

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parallel strings

• Input power sources rarely

match the voltage and current

requirements of the LED Array

LED Driver

LED Array (Module),

Package or Lamp

. . .

. . .

. . .

. . .

. . .

Control

Power Source

or

or

or ?Power

Supply

Driving LEDs – series, parallel or both?

TI Confidential

Single Series LED string

� Always preferred method

� Good for residential and

commercial applications

� Voltage and Safety issues

with higher # of LEDs

Series-Parallel LED Strings

� Cost Effective way to drive

more light with low cost and component impact on LED Driver

Parallel LED strings

� Best performance for high

lumens applications

(Outdoor and High Bay)

� Most Expensive Driver

Solution

LEDs connected in Series

Pros

• Perfect current matching per LED

• Single constant current driver

• Lowest component count and cost

Cons

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• Will generate high voltages for high # of LEDs

• Complicates thermal design and safety certification

• Hence limited to low power applications

• Open string loses all light output

LEDs connected in Series-Parallel

Pros• Drives multiple strings with single constant current driver

• Keeps LED current driver component count low

• Maintains reasonably low voltage per string

• Simplifies thermal design and safety certification

• opens string will cause will cause more current in the good string (some compensation for light output)

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string (some compensation for light output)

Cons• Current sharing per string is not perfect

• Open string will put more burden on remaining LEDs

LEDs connected in Parallel

Pros

• Each string maintains programmed LED current

• Most flexibility to control individual string



• Open string will result in only that string failing, the rest of luminaire is lit

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• Open string will result in only that string failing, the rest of luminaire is lit

up.

Cons

• Require one constant current driver per string

• Increases component count, cost and failure rate

Analog TI “Offline” LED Lighting

Solutions (AC/DC)

TI Confidential

LED General Illumination Applications

LED Lighting

Residential

< 25W or

3,000 lm

Commercial

15W – 75W or

1000 lm - 10000 lm

Outdoor and Infrastructure

35W – 250W

2500 lm - 30,000 lm

TI Confidential10

Driver Topologies Driver Topologies Driver Topologies

Buck, Boost, Buck Boost, SEPIC

and Flyback

Buck, Boost, Buck Boost, SEPIC

and Flyback

PFC Boost, Flyback Half-Bridge,

Buck, Multi-string

Street Light Area Light Flood LightE14 E27/A19 PAR38

LED String configuration

single string


single string, some parallel


single string, some parallel,

Individual control of many strings

MR16 ArchitecturalDisplay Case Retail Display

LED General Illumination Applications

LED Lighting

Residential

< 25W or

3,000 lm

Commercial

15W – 75W or

1000 lm - 10000 lm

Outdoor and Infrastructure

35W – 250W

2500 lm - 30,000 lm

TI Confidential11

Low Cost, TRIAC Dimming,

PFC, High Efficiency, Color

Quality, Safety, Long Life

PFC, High Efficiency,

Dimming, Early Payback, Color

Quality, Safety, Maintenance,

Eco-friendly

PFC, High Efficiency,

Early Payback, High

Brightness, Safety,

Maintenance, Eco-friendly

TPS92010

TPS92210

TPS92001/2

UCC28810

UCC28811

UCC28810

UCC28811

Street Light Area Light Flood LightE14 E27/A19 PAR38

TPS92010EVM-592 (110V)

TPS92010EVM-631 (230V)

TPS92210EVM-613

UCC28810EVM-002

UCC28810EVM-003UCC28810EVM-003

MR16 ArchitecturalDisplay Case Retail Display

Residential

Lighting LED Driver Solutions

Key Factors

• Low Cost

• High Efficiency

• Power Factor Correction

(<25W Applications)

TI Confidential12

• Power Factor Correction

• TRIAC Dimmer Compatible

• Color Quality

• Long Life

The Trouble with TRIACs

Light

Bulb

R1 C1

TRIAC

Wall dimmer

AC

Input

Dimmer

Output

L

N

DIAC

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• Start of AC cycle TRIAC initially off

– C1 charges through R1 and light bulb

• When voltage on C1 exceeds DIAC threshold voltage the TRIAC conducts

– R1 controls when TRIAC turns ON, dimming function

• Light bulb load must maintain TRIAC holding current

– TRIAC turns off close to zero crossing and cycle repeats

• LED lights do not always consume enough power to keep TRIAC ON

– Need to solve this with extra circuitry

Special care is required when making LED lighting compatible to standard TRIAC dimmers

• High Efficiency LED Lighting Current

• Quasi resonant and low power modes

• High Performance TRIAC Dimming with

Application Circuit

• Programmable Overvoltage Protection

• Internal Over-temperature Protection

• Current Limit Protection

� Cycle-by-Cycle Power Limit

� Primary Side Overcurrent Hiccup

TPS92010High Efficiency Offline LED Lighting Controller

• 87% Achievable Efficiency – Higher than

Standard Flyback Topologies

• Less than 400mW Standby Current Allows

Efficient Deep Dimming

• 20% More Efficient Dimming compared with

Other Methods

• Safely Shuts Down Driver if Open or Over

Temperature Condition is present

• Protects Driver from Abnormal Conditions

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� Primary Side Overcurrent Hiccup

Restart Mode

• TrueDrive Gate Drive 1A sink, 0.75A Source

• Residential LED Lighting Drivers

• Drivers for Wall Sconces, Pathway and Overhead

Lighting

• Drivers for Wall Washing, Architectural and

Display Lighting


• Lower Switching Losses Reducing System Cost

TPS92010EVM 6Watt LED Lighting Driver

Key Features

• 120V and 230V input designs

• Tightly Regulated LED current

• Compatible with standard TRIAC

Dimmers

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Dimmers

• Near Lossless Deep Dimming

• High Efficiency

– Maintained during dimming

TPS92010EVM-592 Specification

Specification Value Unit

LED configuration 5 Ser.

Input Voltage 100 - 130 VAC

Efficiency 84 %

Power 6 W


Dimming Input Triac

Dimming Level 0-100 %

Current Sensing Res.

Current Ref

Accuracy

3 %

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Power Factor 0.55

Output Voltage 14 - 18 VDC

Output Current 325 mA

LF Output Ripple 0 mVpp

Isolation Yes

Temp. Range -20 to 50 oC

Lifetime* 35000 Hrs

Turn on time 150 mS

EMC Regulation FCC B

Safety Regulation No

Driver Dimensions 60 X 20 mm

Note: *Lifetime assumes 35oC internal temp. rise from ambient.

TPS92010EVM-631 Specification


LED configuration 5 Ser.

Input Voltage 185 - 265 VAC

Efficiency 85 %

Power 6 W


Dimming Input Triac


Current Sensing Res.

Current Ref

Accuracy

3 %

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Power Factor 0.55

Output Voltage 14 - 17 VDC



Isolation Yes


Lifetime* 35000 Hrs

Turn on time 150 mS



Driver Dimensions 60 X 20 mm


TPS92010EVM Schematic

LM385

Input Filter

Flyback

Power Stage

LED Current

Control

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Near Lossless

Dimming Trigger LM385

Set Point

Generation

• Efficiency Measured with

a 5 LED Series String at

300mA

• Voltage across the string

is approximately 16.25V

• Dimming Efficiency

TPS92010EVM Efficiency

TI Confidential

• Dimming Efficiency

includes TRIAC losses

• Flat efficiency down to less

than 1/3 load

• Maintains high efficiency

down to 0.5W of delivered

power to LED loads

TPS92010EVM Dimming Performance

• Traditional problems TRIAC

triggering and holding

currents with LED lighting are

solved.

• Dimmer triggering provides

loading of the TRIAC at AC

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loading of the TRIAC at AC

line crossover for proper

dimmer operation.

• DC current during dimming

– No audible noise

• Steady deep dimming

– Two Step dimming pleasing to

eye

TPS92010EVM EMC Performance

• Conducted EMI Results at 120V input

• Measurement used peak detector.

– Upper limit line is Class B Quasi-Peak, Lower is Class B Average.

TI Confidential

Passes EMI FCC Class B Quasi-Peak Level – Can be optimized further

TPS92010Reference Designs Available

PMP # Device D.S. # LEDS VIN VOUT IOUT(mA) TRAIC Dimming ISO Topology

3522 TPS92010 INDIA 6 90-300 21 350 � � SEPIC

3526 TPS92010 INDIA 5 120-300 20 350 � � SEPIC

3527 TPS92010 INDIA 5 120-288 18 350 � � SEPIC

3529 TPS92010 INDIA 6 120-275 21 350 � � SEPIC

3530 TPS92010 INDIA 4 120-275 16 700 � � Isolated SEPIC



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- TPS92010EVM-592 LPP 5 110-130 16.5 325 � � Flyback

- TPS92010EVM-631 LPP 5 185-265 16.5 325 � � Flyback

TPS92010 Lighting Solution Summary

Triac Dimmable for light bulb replacement applications

• Small form Factor - 3W to 12W applications

• High efficiency

• Deep Dimming Capability

Key Differentiator

For low power lighting applications that

Do Not require Power Factor Correction

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Key Differentiator

• Licensed IP for Lossless Dimming Circuit

Competitors dimming techniques dissipate more power at deep dimming levels than the power consumed driving the LEDs!

The Losses in the dimming circuit also adds to the heat which reduces system life and reliability

• Ideal for Single Stage LED Driver Designs

• Isolated and Non-isolated Topologies

• TRIAC Dimmable Application Circuit

• 30% Fewer external components

• Convenient 5V Reference Output

• Under-voltage Lockout for Safe Operation

• 0.4A Source/0.8A Sink FET Driver

TPS92001/2General Purpose LED Lighting PWM Controller

• Power Factor > 0.7

• Adds LED Load Flexibility

• Low Cost Deep Dimmable Solution

• High Density-Small Form Factor

• Power For µController or Linear Circuits


TI Confidential24

• Retrofit LED bulbs – A19, PAR30/38, GU10



Lighting

GND

REF

RTC GD

VDD

CS

RTD

SS

5

6

7

81

2

3

4

TPS92001

Linear

RegEMI

Filter

TRIAC

Dimming

Control

TPS9200111W LED lighting Driver

• 120V input design

• Regulated LED Power

• Compatible with TRIAC Dimmers

– 0% to 100% Range

– Maintains TRIAC holding current

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• High Efficiency

– Maintained when dimmed

– Flat over line input range

• Design available with no Aluminum Electrolytic capacitors

TPS92001PMP5163 Reference Design Spec

Specification Value** Unit

LED configuration 5 (9)

Input Voltage 108-132 VAC

Efficiency 80 (84) %

Power 6 (11) W


Dimming Input TRIAC


Current Sensing Res

Current Ref

Accuracy

N/A %

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Power Factor 0.74 (0.82)

Output Voltage 15.2 VDC



Isolation None VAC


Lifetime* 40,000 Hrs

Turn on time 150 mS



Driver Dimensions 32x60 mm

Note: * Lifetime assumes 35oC internal temp. rise from ambient.

** Values in brackets are for 9 LED load

Current Control

Low Side Buck

+

+

TPS92001PMP5163 Reference Design Schematic

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Deep Dimming Circuit

Dummy Load Added During

Deep Dimming

TPS92001

TPS92001PMP5163 Reference Design Schematic

No Aluminum Electrolytic Capacitors

TI Confidential28

TPS92001


PMP # Device D.S. # LEDs VIN VOUT IOUT(mA) TRAIC Dimming ISO Topology

3021 TPS92001 US 100-305 80 700 Boost-Flyback

3155 TPS92001 US 85-132 51 350 Buck-Boost

3220 TPS92001 US 85-132 51 Buck-Boost

3239 TPS92001 US 85-132 51 Buck-Boost

4150 TPS92001 US 17 85-132 51 350 Buck-Boost

4157 TPS92001 US 1 250-400 4.5 4.7-2 Flyback

4547 TPS92001 US 1-4 180-265 4-15 700 Buck

4872 TPS92001 US 10 108-132 30 350 Buck

TI Confidential

4885 TPS92001 US 108-132 350 Buck

4886 TPS92001 US 108-132 350 Buck

4981 TPS92001 US 108-132 350 Buck

5013 TPS92001 US 10 108-132 350 Upside Down Buck

5014 TPS92001 US 6 108-132 700 Upside Down Buck

5100 TPS92001 US 6 500 Inverted Buck

5101 TPS92001 US 12 350 Inverted Buck

5163 TPS92001 US 108-132 350 � � Buck

5198 TPS92001 US 250-305 28 350 Buck

For low to medium power lighting applications

that require Power Factor Correction

Isolated and Non-isolated versions available

TPS92001PMP5163 Lighting Solution Summary


• Non Isolated Single Stage Solution for Lowest System cost

(PFC + LED Current Regulation)


• High efficiency

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• Deep TRIAC Dimming Capability

• Power factor excellent due to power modulation scheme.

• Very Low THD

• No electrolytic capacitors option

Key Differentiator

• Single power conversion stage meets regulatory power factor requirements and

provides tight LED current regulation with deep TRIAC dimming, lower total system

cost!

TPS92210PFC LED lighting driver controller

• Flexible Operation Modes: Peak Primary Current,

Constant On-Time or both

• Cascoded MOSFET Configuration

• Works with TRIAC dimmers

• Transformer Zero Energy Detection

• DCM or TM operation

• Advanced Over-current Protection

• Over-voltage protection

• Constant On-Time implements single stage PFC

• Fast and easy start up

• Line Surge Ruggedness better than Internal HV FET

• Continuous linear dimming

• Proven applications with TRIAC dimmers

• High Efficiency, low EMI

• No reverse recovery loss in output rectifier

• Smaller Size and Lower System Cost

TI Confidential31


•A19 (E27/26, E14), PAR30/38, GU10


Lighting

• Drivers for Wall Washing, Architectural and

Display Lighting

• Commercial Troffers and Downlights

TPS92210EVM Specification


LED configuration 9-11

Input Voltage 90-130 VAC

Efficiency 85 %

Power 12.5 W


Dimming Input TRIAC


Current Sensing Res

Current Ref

Accuracy

3 %

TI Confidential32

Power Factor 0.99

Output Voltage 38 VDC



Isolation 2500 VAC


Lifetime* 35000 Hrs

Turn on time 150 mS


Safety Regulation

Driver Dimensions 34 dia mm




3649 TPS92210 INDIA 5-9 85-280 16-30 350 � � Flyback

3661 TPS92210 INDIA 24 85-270 80 350 � � Flyback

4956 TPS92210 US 6 100-305 20 800 � � Buck

5170 TPS92210 US 14 320-410 42 700 � � Flyback

6001 TPS92210 LPP 11 90-265 38 350 � � FlybackNew

New

New

TI Confidential

For low to medium power lighting applications

that require Power Factor Correction

TPS92210EVM Lighting Solution Summary


• Single Stage Solution (PFC + LED Current Regulation)


• Deep TRIAC Dimming Capability

• Isolation is optical – compatible with safety standards

TI Confidential34

• Excellent efficiency even during dimming

• Life Limited by the Elec Caps

• Power factor excellent due to power modulation scheme.

• Very Low THD

Key Differentiator

• Single power conversion stage meets regulatory power factor requirements and provides tight LED current regulation with deep TRIAC dimming, lower total system cost!

Low Power Light Bulb Replacement

Cost/Performance Matrix

Solution Power Safety

Output Ripple

Current

Power

Factor

TRIAC Dimming

TPS92210EVM 15W Isolated ~ 25%

Depends on Output

Capacitance

0.99 Standard

Performance/Cost

TI Confidential35

TPS92010EVM 6W Isolated DC 0.55 Lossless

PMP5163

(TPS92001)

6W- 11W Non-Isolated 100% - 120Hz 0.72 StandardPerformance/Cost

Features

Commercial, Outdoor and Infrastructure

Lighting LED Driver Solutions

Key Factors

• PFC

• High Efficiency

• Dimming

(15W to 250W Applications)

TI Confidential36

• Early Payback (low cost)

• Uniform Intensity

• Safety

• Low Maintenance

UCC28810/1

LED Lighting Power Controller

• Transformer Zero Energy Detection

• Transition Mode Control

• Implements Single Stage Power Factor Correction

• Application circuit implements industry standard

phase-cut dimming

• Advanced Transient Response, Accurate Internal

Vref, Low Startup Current, 750 mA gate drive current

• UVLO, OVP and Open Loop Detection

• Low Cost, High Efficiency and Low EMI

• Achieves lighting standards requirements,

reduces cost and size

• Dimming of LED fixture achieved without

changing wall dimmer

• Cost Effectively improves performance of LED

driver

• Improves reliability and life time of lighting fixture

TI Confidential37

• AC input General Illumination HB LEDs Applications

• Commercial, Residential, Industrial Lighting Fixtures

• Outdoor Lighting: Street, Roadway, Area, Parking

• UVLO, OVP and Open Loop Detection • Improves reliability and life time of lighting fixture

UCC28810/11Reference Designs Available


2731 UCC28810 US 90-264 40 700 PFC SEPIC

3976 UCC28810 US 150-264 275 350 PFC SEPIC

4501 UCC28810 US 180-265 48 700 PFC Flyback





4601 UCC28810 US 85-265 6.5 2200 PFC Flyback

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UCC28810/11Reference Designs Available



4719 UCC28810 US 90-264 300 350 TM Boost + TM Buck

4722 UCC28810 US 90-265 24 2000 PFC Flyback/Buck

4731 UCC28810 US 90-264 50 700 PFC Boost+LLC

4833 UCC28810 US 90-264 275 350 PFC SEPIC

4862 UCC28810 US 3 x 24 150-264 350 PFC Flyback/Buck

5039 UCC28810 US 85-265 275 350 PFC SEPIC


TI Confidential


5112 UCC28810 US 95-305 150 500 PFC SEPIC

5242 UCC28810 US 85-265 208 110 PFC SEPIC

5405 UCC28811 US 30-60 85-265 350 PFC SEPIC

5434 UCC28810 US 150-264 275 350 PFC SEPIC

UCC28810EVM-002 100W LED Lighting

Driver • Universal input non isolated design

• Regulated LED current

• PWM Dimming, 200Hz to 1kHz

• High Efficiency

– Maintained during dimming

• Active power factor correction

TI Confidential40

• Active power factor correction

UCC28810EVM-002 Specification


LED configuration 15 to 30

Input Voltage 90 to 264 VAC

Efficiency 93 %

Power 100 W


Dimming Input PWM

Dimming Level 10 to 100 %

Current Sensing Res



TI Confidential41

Power Factor 0.97

Output Voltage 109 VDC



Isolation None

EMC Regulation No


Driver Dimensions 265 x 51 mm


UCC28810EVM-002 Block Diagram

1st stage: TM Boost for PFC 2nd stage: TM Buck for LED current

TI Confidential42

Applications

• LED Street & Roadway Lighting

• LED High Bay Industrial Lighting

• DTV LED backlighting

High-Power Multiple

String Architectures

43

High-Light Output Drivers

Traditional ImplementationSupply with PFC, Low Voltage DC output LED Strings Driven with Multiple Buck Regulators

Power Supply (with PFC)

TI Confidential44

PFC Stage -> Required in any implementation

DC-DC Stage -> Provides constant voltage and isolation stage

Multiple Bucks -> Provides constant current to each LED string

Benefit:

• Allows for individual string dimming

Drawbacks:

• Controller and MOSFET and Inductor required for each LED string

• Decreased reliability due to many extra converters

High-Light Output Drivers

PFC + Buck + Multiple StringsSIMPLEDrive: PFC + DC-DC + Multiple Buck stages

TI Confidential45

PFC Stage -> Required in any implementation

Low Side Buck -> Provides constant LED Current and main control

Series Transformers -> Provides constant current to each LED string

Benefit:

• One control section for all string currents,

• Lower part count, higher reliability and lower cost

Drawback:

• All strings will be dimmed simultaneously (if individual dimming is required)

Series Input, Multiple Parallel Equivalent LED Drive (SIMPLEDrive )

UCC28810EVM-003 - SIMPLEDrive™

1st stage:

TM Boost for PFC

2nd stage:

TM Buck for LED current

3rd stage:

Resonant Current Half Bridge

TI Confidential46

http://focus.ti.com/docs/toolsw/folders/print/ucc28810evm-003.htm

l

LEDs connected in ParallelPros• Each string maintains programmed LED current

• Most flexibility to control individual string



• Open string will result in only that string failing, the

Recalling the Pros and Cons of LED Strings connected in parallel

TI Confidential

• Open string will result in only that string failing, the

rest of luminaire is lit up.

Cons• Require one constant current driver per string

• Increases component count, cost and failure rate

SIMPLEDrive™ features

• Better than 1% LED current matching between strings

• Highest quality Uniform light output

• High Efficiency (~90%), Resonant Topology

– Higher efficiency achievable through narrower - non universal input voltage range

• Readily scalable to higher or lower power levels (ideal for modular solution)

• Isolated topology – String voltage safety within SELV levels

• More cost effective than constant voltage + 1 Buck per string architecture

• No secondary to primary feedback required (no opto) – (closed loop on primary side)

TI Confidential48

• No secondary to primary feedback required (no opto) – (closed loop on primary side)

• PWM or Amplitude modulation dimming

• Active Power Factor Correction.

• Improved reliability through simple open LED string protected

Patent Pending architecture

Applications

• LED Street & Roadway Lighting

• LED High Bay Industrial Lighting

• DTV LED backlighting

UCC28810EVM-002 / 003 Design Tool

TI Confidential

UCC28810EVM-003 Specification


LED configuration 4 x 15

Input Voltage 90 to 264 VAC

Efficiency 90 %

Power 100 W


Dimming Input PWM

Dimming Level 10 to 100 %

Current Sensing Res



TI Confidential50

Power Factor 0.97

Output Voltage 54.5 VDC



Isolation Yes

EMC Regulation No

Safety Regulation Yes**

Driver Dimensions 370 x 51 mm


** Designed with reinforced isolation to UL60950 but not certified

UCC28810EVM-003 using SIMPLEDrive

Efficiency

86

87

88

89

90

91 Efficiency - %

TI Confidential51

80

81

82

83

84

85

25 50 75 100

Load - % PWM Dimming

Efficiency - %

VIN = 90V

VIN = 115V

VIN = 230V

VIN = 264V

UCC28810EVM-003 Open String Protection

• If one string fails the other remain on.

• Each output incorporates a zener and SCR crowbar circuit

– D2, SCR1, R1 and R2

• When string fails, zener voltage is exceeded and SCR latches on

• Transformer continues to deliver current to SCR and LED String #2

TI Confidential52

Waveforms During Normal Operation

Questions / Answers

TI Confidential

Documents

TI LED Lighting Solution Overview - Texas Instruments€¦ · Agenda • Basics of LEDs • AC/DC LED Lighting Solutions – Residential and retrofit lighting driver solutions TI