Texas Instruments Tech Day 2007

TI Solutions for LED Lighting

Setting LED Current Voltage Controlled Cheap Simple Extremely Poor regulationCurrent Controlled More expensive Excellent regulation

Multiple LED ConfigurationsEasiest to implement andControl Limited by converter topology or possibly Safety voltage limitationsCurrent matchingLow CostPoor RegulationLossy w/o Op AmpBest Parallel ControlMost ExpensiveNeed matching MOSFETsLinear (lossy)

Analog vs PWM DimmingAnalogChanging the LEDs DC current changes LED intensityi.e.,25% brightness by running a 400mA LED at 100mAImplemented with digital programming of IC or with an external voltage100mA200mA300mA400mA0.25TTAnalog DimmingPWM Dimming100mA200mA300mA400mAPWMChanging duty cycle of applied current i.e., 25% brightness by running 400mA for only 25% of the time.PWM frequency should be greater than response time of human eye (approx 60Hz) Implemented with PWM of IC enable or external voltage

Solutions to ChallengesTI DC to Constant Current LED Driver ExamplesTPS63000 Buck/Boost DriverTPS61050 LED Flash DriverTPS61081 Boost DriverTPS61200 Ultra Low VinTPS62050 800-mA 10V VinTPS62100 500-mA, 9V Vin

TPS40K DC Adjustable Current HB LED DriverTPS5430 DC Integrated FET HB LED DriverTPS43000 Multi-Topology HB LED DriverUCC280x 24Vin Boost HB LED DriverHigh PowerLow PowerOrSingle HB LED

Boost Converters: (Integrated Switch) ProductsInput Voltage0.3 0.8 0.9 1.8V 2.5V 2.7V 3.3V 4.5V 5.5V 6.0V 9.0V 10V 12V 17VTPS6108028VTPS6108128VTPS61050 2.5 to 5.5V 1200mA WLED Flashlight DriverTPS612001.8V to 5.5V4.5A2.0A1.8A1.5A1.3A1.2A1.1A1.0A0.8A0.7A0.6A0.5A0.4ASwitch Current LimitBoost only Buck/BoostKEY CAREABOUTS: High Efficiency Small Solution Size High VOUT & High IOUTHEROHEROHEROHERO

TPS63000 Family 96% Efficient Buck/Boost Driver

Input Voltage: 1.8-V to 5.5VOutput Voltage: 1.2V to 5.5V, 3.3V, 5.0V Output current Switch: 1.7Aup to 1200mA output current in Buck configuration @ 3.3Vup to 800mA output current in Boost configuration @ 3.3V Efficiency: 96% over wide Vin range (max)Package: 3x3 QFNAutomatic Transition between Step Down & Boost ModeDevice Quiescent Current less than 25-APower Save Mode for Improved Efficiency at Low Output PowerForced fixed Frequency Operation possibleLoad Disconnect During ShutdownOver-Temperature Protection

2-Cell and 3-Cell Alkaline, NiCd or NiMH or Single-Cell Li Battery Powered LED Equipmentssmall Inductorlow Vin !Focus ApplicationsKey Features

Smallest solution size, requires only 2.2uH InductorSupports input voltages as low as 1.8V (for 2-cell Alkaline)Highest efficiency over wide Input rangeBenefits

Battery Powered Buck-Boost LED driverActual design used by Cree for demonstration board

Input Voltage: 2.5 to 6.0V Output Voltage: Vin to 5.5V Switch Current Limit: 2A (max) Quiescent Current: 8.5mA Shutdown current: 1.3uA (max) I2C Compatible Interface (up to 400kbps) Five Operational Modes Integrated Over-Voltage Protection (OVP) LED Disconnected in Shutdown Integrated Current Limit, Short-Circuit Protection and Thermal Shutdown Package: 12-bump WCSP or 3x3 QFN-10 Total Solution Circuit Area < 25 mm2

Torch White LED supplyGeneral lighting applicationsAmbient LightingBarcode ReadersFocus Applications

Smallest Total Flashlight Solution Size ! 2MHz switching frequency allows the use of small, low profile 2.2H inductors. Supports up to 5W !BenefitsKey FeaturesTPS610501.2A High-Power DC/DC Boost Converter with I2Csmall InductorI2C Interfaceup to 5W output !Options: TPS61050: TX Masking InputTPS61052: Hardware Voltage Sel.ModeTPS61054: GPIO pins

VOUT

AVIN

SW

CIN

VIN

SW

LED

COUT

PGND

PGND

P

P

P

AGND

L

GPIO

SDA

SCL

I2C I/F

FLASH_SYNC

GND

P

2.2H

10F

TPS61080/1High Vout Boost Driver

Input Voltage: 2.5V to 6.0V Output Voltage: up to 27V (max)Switch current Limit: 0.5A (TPS61080)1.3A (TPS61081)Efficiency: 85% (max) 10 pin 3x3mm QFN packageInput-to-output isolation great for medicalShort circuit protectionOvervoltage protectionThermal protectionAdjustable SoftstartIntegrated power diode600kHz or 1.2MHz fixed switching frequency

Smallest solution sizeHighest EfficiencySeveral Protections Circuits

LCD Bias supplyOLED Bias Power SupplyWhite LED backlightWhite LED flashlightThe differential feature of the device is high reliability. The device can protect itself and external components when theres short between any pins and between any pin to ground.BenefitsKey FeaturesFocus Applications

TPS612000.3V Input Voltage Synchronous Boost Driver

Input voltage: 0.3V to 5.5VStartup into full load at 0.5V input voltage1.8V to 5.5V output voltageSwitch current limit: 1.5A (max)More than 90% efficiency at:600mA output current at 3.3V (VIN 1.2V)600mA output current at 5V (VIN 3.3V)Quiescent current: < 55APackage: 3x3 QFN

1-/2-/3-cell alkaline, NiCd or NiMH battery or 1-cell Li battery powered lampsSingle-solar cell & micro-fuel cell powered lampsPortable solar charger

Integrated DownMode enables continues operation during VIN > VOUT conditionsAutomatic transition between Boost mode & Down Conversion mode Load disconnect during shutdownPerfect for Single Cell Alkaline TorchBenefitsKey FeaturesApplications

TPS62050 800-mA, 10V Vin, Step-Down Driver LED current = VFB / R1

2.7V to 10V (11Vmax) input voltage rangeUp to 800-mA output current, up to 95% efficiency 12-uA (typ) quiescent current, 2-A shutdownPFM power-save mode for light loads850-kHz (typ) operation, synchronizable to external clock up to 1.2MHzForced-PWM mode available Power Good and low-battery detectSoft-start limits in-rush currentMSOP-10 packageKey Features

Industrys best combo of high efficiency, low power and output currentWhy Buy

Suitable for 3- to 6-cell alkaline or 1- to 2-cell Li-Ion as well as 9-V wall adapter applications Conserve battery capacity, limit heat dissipation small inductors 10H reduces noiseBenefits

TPS62100 Family500mA, 9V Vin Step-Down DC/CC LED current = VFB / R1

2.5V to 9V Input Voltage Range500mA Output CurrentSwitching frequency: 300kHz, 600kHz, 1MHz, 2MHz100% Duty cycle for lowest dropoutPWM/PFM operation for highest efficiency over wide load current rangesExternal Synchronization8 pin SOICKey Features

Suitable for 3- to 6-cell alkaline or 1- to 2-cell Li-Ion as well as 9-V wall adapter applications Conserve battery capacity, limit heat dissipation small inductors Multiple frequency options available for choice in size or efficiency constraintsBenefits

TPS40200Wide Input, Low Pin Count Driver

4.5V to 52V operationVoltage Mode Control with Feed Forward Compensation 700mV Voltage Reference - 1% accuracyInternal Under-Voltage LockoutProgrammable Frequency (35kHz-500 kHz) Programmable Overcurrent ProtectionFrequency SynchronizationClosed Loop Soft StartIntegrated DriverPackage - 8 pin SOICKey Features

Wide input range for use in many applicationsVoltage feed forward great line regulation, fast transient response Programmable features allows flexible design; frequency, overcurrent protection, under voltage lockoutSoftstart provides smooth, well controlled power upSimple configuration- minimal external componentsBenefits

Adjustable Current HB LED Driver

Wide Vin Buck Boost LED DriverBuilt and tested with Avago ADJD-MJ50/51 & ADJD-MJ60/61

TPS5430 - 5.5V to 36V Input, 3-A Step Down LED Driver

High Efficiency Up to 95%Small Output Inductor & CapacitorHigh PerformanceLimits Start-up Inrush CurrentReduced External ComponentsEasy On/Off ControlSelf-Protected from Fault ConditionsLow Power Consumption when Switched OffReliable & Robust at Extreme TemperaturesSmall with Good Thermal PerformanceQuick & Easy Design www.ti.com/swiftBenefits

Integrated 110m N-channel MOSFETFixed 500kHz Switching FrequencyOutput Voltage to 1.23V with 2% accuracy Internal Slow Start CircuitInternal CompensationEnable PinCurrent limit & Thermal ShutdownOnly 17uA Shutdown Quiescent Current-40C~125C Operating Junction Temp.Thermally Enhanced 8 pin HSOICSWIFTTM Software ToolFeatures

Driving High Current LEDs with the TPS54304 LEDs @ 500mA

Wide Input Voltage Range: 5.5 V to 36 VMax 3A drive currentBuck Converter Output up to 87% VinInternally Compensated, eliminates componentsHigh Efficiency with Integrated 110mOhm MOSFETFeatures

TPS43000Multi-Topology High Frequency PWM Controller

2 MHz Switching FrequencyVoltage Mode Control High Efficiency Synchronous Rectification Drivers Fully functional from 1.8V through 9VWorks with Buck, Boost SEPIC & Flyback TopologiesFixed Frequency Operation or Pulse Frequency Modulation (PFM) ModeBuilt-In Soft StartUser Programmable Discontinuous or Continuous Conduction ModesFeatures

2 to 4 Cell Alkaline or Nickel, 2 Cell Lithium LampsHigh current boost from 5V wall adapterApplications

TPS43000 LED Driver Vin=1.8V to 8V350mA LED current

UCC280x - Current Mode PWM Controllers

100-A Typical Starting Supply Current 500-A Typical Operating Supply Current Operation to 1 MHz Internal Soft Start Internal Fault Soft Start Internal Leading-Edge Blanking of the Current Sense Signal 70-ns Typical Response from Current-Sense to Gate Drive Output 1.5% Tolerance Voltage Reference Same Pinout as UC3842 and UC3842APWM controllers with Peak Current Mode or Average Current control methodology use a dual-loop control circuit to adjust the regulating pulse width in response to load changes. Current Mode controllers provide a fast transient response with built-in current limiting.Features

Part NumberMax Duty CycleRef. VoltageTurn-On ThresholdTurn-Off ThresholdUCC2800100%5V7.2V6.9VUCC280150%5V9.4V7.4VUCC2802100%5V12.5V8.3VUCC2803100%4V4.1V3.6VUCC280450%5V12.58.3VUCC280550%4V4.1V3.6V

24Vin Boost LED Driver

General LED Lighting System QuestionsLED VfLED CurrentNumber of LEDsLED configuration (series, parallel, series & parallel)Input voltage rangeCurrent Matching RequirementsEfficiency RequirementApplication (backlight, active display)Dimming (Y/N; Analog or PWM)AC/CC Transformer Height Profile, PFC if > 25W, Isolation

Why current sink solution? (1)SOURCE: SLVS441B3 TLC5940 in parallelDC-DC solution:High current rippleLow current accuracy between dc-dcPriceSlow rise time at high current, rise time depends on switching frequency of dc-dc Current sink solution:Fast rise and fall timeHigh current accuracy from each channel to each channelHight current accuracy from PWM pulse to PWM pulseOnly one power supply neededLow costLow dc voltage possible

LEDs are current driven devices. Any change and ripple in current visible(2)

TLC59xx RGB LED Driver Portfolio

1024 G/S, 12 CH24Pin HTSSOPNon G/S10-bit + G/S8-bit G/S16 CHLOD Support 32 TSSOPTLC59404096 G/S, 16 CHDot Correction (EEPROM)28 PIN DIP & TSSOP

TLC59414096 G/S, 16 CH28 PIN DIP & TSSOP

TLC593016 CHDot Correction 32 TSSOPTLC5922TLC5923TLC592116 CHLOD & Dot Correction 32 TSSOPTLC5904256 G/S, 8/16 CH100 PIN HTQFP

TLC5905256 G/S, 8/16 CH64 PIN HTQFP

TLC592416 CHLOD & Dot CorrectionPre Charge FET 32 TSSOP / QFNHEROKEY CAREABOUTS: Display Quality System Reliability LOD: LED Open Detection

TLC5924 Multiplexing LED Display Driver80mA Constant CurrentTLC5924TLC5924Pre-charge FET

Fast data transfer ratesSuperior sharpness with 128 adjustable stepsIncreased system reliability with thermal shutdown & LOD FlagIntegrated pre-charge FET for improving image quality & space savings with reduced component count Space saving high-power thin (PowerPAD) packageBenefits

16 Channels7-bit (128 steps) Dot CorrectionPre-charge FET3.0V to 5.5V input voltage rangeChannel voltage up to 15V input80mA Constant Current/ChannelChip to Chip Accuracy: 4% typCH to CH Accuracy: 1%typ Two built-in Error flags (LED Open & Thermal error)Controlled in-rush currentFeatures

Multiplexing type LED Display ( , Duty Cycle )In Door Display using Dynamic ScanningApplicationsSmaller, Highly integrated , Spike Noise free solution ideal for multiplex type LED display.

Multiplexing LED DisplayIn low brightness, low current applications sequencing can be used to reduce number of LED-drivers. In above example 8 scan lines controlled by the control unit has been added. Each scan-line is a power source for a LED-line and will be multiplexed with the LED-driver.

Ghosting 5VGND5VGNDTLC59xx+ VLED1-- VLED2 +VoutStray board andCable capacitanceGhosting is unwanted momentary illumination of LED Appears as affects in multiplex systems Mismatch in diode forward voltage Stray board capacitance Current spike in D2 when VLED1>VLED2

TLC5940 RGB LED Driver w/Dot Correction & PWM Grayscaling EEPROM120mA Constant CurrentTLC5940TLC5940TLC5941 - Low-cost TLC5940 w/o EEPROM

High integration level; grayscale & Dot Correction; high accuracy; fast data transfer rates; wide input voltage rangeWhy Buy

Superior display quality through PWM Grayscaling & Dot CorrectionIncreased system reliability with LOD & Thermal ShutdownBenefits

16 Channels12-bit (4096 steps) PWM Grayscaling6-bit (64 steps) Dot Correction3.0V-5.5V Input Voltage Range120mA Constant Current/Channel30MHz Transfer RateChip to Chip Accuracy: 2.7% typChannel to Channel Accuracy: 1%typIntegrated EEPROMFeatures

Mono-color, Multi-color, Full color LED DisplaysLED SignboardsDisplay BacklightingApplications

TLC5917 / 27 Constant Current LED driver

16 constant current sink outputs (0mA 120mA)Current output programmable by external resistor Programmable current gain (8-bit)Current accuracy between channels 3% (typ)Diagnostic Open load (On) Overload / Overtemperature (On)Protection Individual channel over-temperature shutdownSerial communications interface (4 wire, cascadable) Thermally enhanced packaging concept for efficient heat management (20 pin HTSSOP or QFN)Supply 3.3V or 5VFeatures

LED illumination and intensity controlApplications

Programmable constant load current Fault reporting

Benefits

Constant Current LED System DiagramGNDD0Vcc6x TLC5917D1D2D3D4D5D6D7IreguCDC/DC5VGNDD0Vcc6xTLC5917D1D2D3D4D5D6D7IregGNDD0Vcc6xTLC5917D1D2D3D4D5D6D7Ireg555DC/DCVsupply redDC/DCVsupply greenDC/DCVsupply blueMounted on PCB as autonomous ModuleSeveral modules combined for up to 500k points

RGB Video Wall Power SupplyPower Modules are the most popular means of driving LEDs

PTV Series of Vertical SIP DC/DC Power ModulesCompact size single inline package (SIP)Output current 8A or 18AEfficiencies up to 90%Output voltage adjust Over-current protection provides non-latching (auto-reset) operationPOLA compatible

ModelInput VoltageOutput VoltageOutput CurrentPTV12010W12V1.2V to 5.5V8APTV12020W12V1.2V to 5.5V16A

8A & 18A PTV Series Efficiency Used for Red LEDsUsed for Blue & Green LEDs

Upcoming ReleasesTLC594580mA 12 bit PWM, 6 bit Dot Correction, w/o output delayRGB LED Video walls needing quick frame rate

UCC28060Two-Phased Interleaved Transition Mode PFC ControllerLarge white LED Lights needing > 200W Frequency dithering reduces EMI

New TI Lighting websitehttp://www.ti.com/lighting TI LED Drivers Overview Presentation in ESP

TPS61040/128-V Boost Driver in SOT-23SOT-23small inductorSmall cap

Ideal for LCD bias & White LED Backlight applications Extends battery life Enables ultra-small solutions Suitable for: 2- & 3-cell alkaline + 1-cell Li-IonBenefits

Industrys highest efficiency, lowest quiescent current in SOT-23 for ultra-small implementationsWhy Use

LCD Bias Supply, White-LED Supply for LCD BacklightsApplications

Output voltage up to 28V 400/250-mA switch current limit (TPS61040/1) High Efficiency: >85%, 28-A no-load quiescent current typical SOT23-5 package, small inductors, low value capacitors & low overall component count Input voltage range 1.8V to 6.0V TPS61040EVM-001 TPS61040EVM-002 (White LED) TA -40 to 85C

Features

TPS61040 28-V Boost LED Driver

White LED backlight supplyPWM brightness control at ENEfficiency@Vin=3.0V and 15mA = 86%

White LED backlight supplyanalog / PWM brightness control at FBC14.7uFC2100nFVinENSWFBGNDL110uHRs110

D1Vin2.7V to 6.0VR1120kR2=160kAnalogue brightness control3.3V Led Off0V Iled =20mAAlternatively a PWM signal up to 5kHzcan be used swinging from 0V to 3.3V

D224V(optional)

TPS6104228-V Constant-Current White LED DriverMLP-8small inductorSmall cap

1.8V to 6.0V input voltage range, output up to 28V 500-mA switch current limit Precise LED current programming with sense resistor High efficiency: >85% due to low VREF and RDSON 35-uA (typ) quiescent current, 1.0-A shutdown Precise brightness control with PWM signal to avoid chromaticity shift 8-pin MLP package (3x3 mm2), small 100-nF output cap, small 3.3-H inductors, low component count Disconnects LEDs during shutdown Over-voltage protection Up to 1MHz switching frequency TPS61042EVMFeatures

Suitable for: 2- & 3-cell alkaline + 1-cell Li-Ion Drives up to 6 white LEDs Accurately regulated LED current Extends battery life Easy to implement Enables ultra-small solutionsBenefits

White-LED Supply for LCD Backlights: PDA, SmartphonesOutdoor lightingApplications

High-efficiency, small implementationWhy Use

TPS61058/59: White LED Flashlight Boost Converter

Input Voltage: 2.7V to 5.5V Output Voltage: 2.5V to 5.5V Output Current: -1100mA Switch Current Limit (TPS61058)- 500mA LED Current from 3.3-V Input- 1500mA Switch Current Limit (TPS61059)- 800mA LED Current From 3.3-V Input Efficiency: 80% (max) Package: 3x3 QFN-10 Fixed Frequency 650kHz (typ) Operation LED Disconnect During Shutdown Open/Shorted LED Protection Low EMI-Converter (Integrated Anti-ringing Switch) Internal Soft-Start Over-temperature Protection Low Shutdown Current: 100nA (typ)Features

Torch/Camera Flashlight White LED Backlight Generic Lighting ApplicationsApplications

Minimizing external component count with total solution size of ~80mm2Benefits

TPS6106xConstant-Current white LED Driver in CSP

Small inductive-based implementation Ultra-small COutWCSP 2x1 mmDigital or PWM dimming

2.7V to 6.0V input voltage range 400-mA switch current limit 1 MHz fixed frequency Integrated P-channel MOSFET rectifier 8-pin QFN package (3x3mm) or CSP Low value components, minimal count Precise LED current programming (sense resistor) Digital or PWM dimming Disconnects LEDs during shutdown Over-voltage protection:15V on TPS61060 Short-circuit protection on OUT19V on TPS6106124V on TPS61062FeaturesWhy Buy

White-LED Supply for LCD Backlights: PDA, Smartphones

Applications

Suitable for: 1 cell Li-ion, 3-cell NiMH/Alkaline Drives up to 5 white LEDs Enables small inductive solution Accurately regulated LED current Flexible dimming control with integrated DAC Conserves battery power Enables use of lowest voltage output capBenefits

TPS6115xDual Output single Inductor - LED Driversmall Inductor4.7H - 10Hsmall 3x3 QFN packageAnalog or PWM dimming

LED driver for up to: - 12 LED (4.0V forward voltage)- 14 LED (3.5V forward voltage)

Applications

Input Voltage: 3.0V to 6.0V Output Voltage: up to 27V each (max) Switch current Limit: 0.7A (max) Efficiency: 83% (max) Package: 3x3 QFN-10 2 Individual programmable, regulated current Outputs build in Power Diode & Soft-start Input to Output isolation Overvoltage & Short circuit protection Built in 1.2MHz fixed switching frequencyFeatures

Controls 2 strings with only 1 Inductor both strings can be on at the same time up to 30kHz dimming frequencyBenefits

Best in class backlight driver performance, dimming capabilities & total solutions sizeWhy Buy

LDO LED Driver with PWM Bright ControlTPS7510XTypical Device Specifications

Regulated Output Current With 4% LED-to-LED Matching Over Temperature Drives up to 4 LEDs at 25mA each in a Common Cathode Topology 50mV typical Dropout Voltage extends usable supply range in Li-Ion battery applications. Brightness Control Using PWM Signals Two 2-LED Banks with independent Enable and PWM brightness control per bank No Internal Switching Signals Eliminates EMI Default LED Current Eliminates External Components Default values from 3mA to 10mA (in 1 mA increments) available using innovative factory EEPROM programming Optional external resistor can be used for high-accuracy, user-programmable current Over-Current and Over-Temperature Protection Available in Wafer Chip Scale Package (Sept 06) and 3mmx3mm SON-16 (Q4 06)Features

Keypad, Navigation and Display Backlighting Cellular Handsets PDAs and Smartphones MP3 Players

Applications

DeviceLEDsIDXVDOIDXPackageTPS7510X2x225 mA50 mV4%WCSP3x3 SON

TPS60230: 3-channel, Current-regulated 125-mA WLED Charge PumpSupports up to 5 wLEDsMax 25mA per ChannelNo Resistors needed LED Current Setting LED Brightness controlHigh Efficiency (86%): Fractional Conversion, 1x & 1.5x2.7V~6.5V Input Range4C 1R Only

Small, easy-to-use white LED backlight solutionWhy Buy

2.7V to 6.5V input voltage range 3x3 mm2 QFN-16 package, only 5 components Current source for each LED, 25mA per LED High efficiency through fractional 1x & 1.5x conversion PWM dimming 1-MHz switching frequency 160-A quiescent currentFeatures

White LED backlight for color displays in Cell Phones, PDA, Media Players, Digital CamerasApplications

LED Current AdjustmentEN2EN1Mode : VISETLED Current00SD001200mV1/310400mV2/311600mVFull

TPS60231: 3-channel, Current-regulated75-mA WLED Charge Pump in 3x3 QFN-16

2.7V to 6.5V input voltage range 3x3 mm2 QFN-16 package, only 5 components Current source for each LED, 25mA per LED High efficiency through fractional 1x & 1.5x conversion PWM or digital dimming 1-MHz switching frequency 200-A quiescent current TPS60231EVM-047Supports up to 3 wLEDsTPS60230 (up to 5 LEDs)Max 25mA per ChannelNo Resistors needed LED Current Setting LED Brightness controlHigh Efficiency (86%): Fractional Conversion, 1x & 1.5x2.7V~6.5V Input Range4C 1R Only

Small, easy-to-use white LED backlight solutionWhy Buy

White LED backlight for color displays in Cell Phones, PDA, Media Players, Digital CamerasApplicationsFeatures

LED Current AdjustmentEN2EN1Mode : VISETLED Current00SD001200mV1/310400mV2/311600mVFull

TL4242 Constant Current LED driverIn Development

Adjustable constant current up to 500 mA (5%) Wide input voltage range up to 42 V Open load detection Over temperature protection Short circuit proof Reverse polarity proof Wide temperature range: -40 C to 150 CKey Features

Supply voltage independent constant current / brightness PWM capability for dimming No external power resistor required Diagnostic capabilityBenefits

LED illumination and intensity controlExterior: DRLs, fog light, turn lamp, headlamp, Interior: vanity light, map light, courtesy light, Applications

QuestionsObrigado!

Para mais informaesVISITE:http://www.ti.com/lighting

Voltage source Non regulated current. Small changes in either the input voltage or LED forward voltage result in poor current regulation. Battery voltage varies significantly. LED Vf varies between LEDs and with temperature. Regulation can be as poor as +/- 25%.Current source Active current feedback. Compensates for all variations and provides very tight tolerances.At 700mA, the current sense resistor dissipation would be 350mW if 500mV was used as the sense voltage. With the shunt reference to divide up to it is 70mW. It isnt needed, but for battery power a lower feedback voltage is easy to do this way to extend battery life.With less precision, a simple zener could be used. Tolerance of the reference has a huge impact on regulated current though.Main difference to our existing TPS61045 or TPS6106x series is the much larger Power FET which enables higher output currents. Second key feature is the build in Input-to-Output isolation which enables us to support also DINs within the Medical and Industrial world. Great for mid sized medical OLED TFT biasSHORT FORM DESCRIPTIONThe TPS6205x series of 95% efficient, low quiescent current (12A) synchronous step-down dc/dc converters delivers up to 800mA of output current from a 3x5mm2 MSOP-10 package and generates output voltages in the range of 0.7V to 6V.The wide operating input voltage range of 2.7V to 10V makes the device very versatile and very low quiescent current along with high conversion efficiency are ideal for 1- & 2-cell Li-Ion battery or 3- to 6-cell NiMH / NiCd / Alkaline applications. WHY BOTHER / ADVANTAGES OVER COMPETITIONThe TPS6205x fills a gap in the TI portfolio and offers three key improvements over the last generation part TPS6200x:1.) higher input voltage range: Allows the use in 2-cell Li-Ion and 9V wall adapter applications.2.) higher output current (800 vs 600mA).3.) lower quiescent current (12 vs 50A) for longer battery stand-by time.Various competitive solutions from LTC, Sipex, Torex, Vishay and Maxim offer similar performance characteristics at widely varying prices. The key strength of the TPS6205x is the combined performance of input voltage range, output current and low quiescent current coupled with a very attractive price.

All spins of the TPS6205x have a suggested resale price of $1.74 in quantities of 1000. 100ku direct for $1.01. For evaluation purposes evaluation modules TPS6205xEVM will be available by Q103 via the PIC, Distributor or Sample Room. Resale price is $50.ADJD-MJ50/51 & ADJD-MJ60/61

LED VfMaximum output voltageSolution Topology (boost, buck)LED CurrentTopology (switcher, charge pump, current mirror)LED configuration (series, parallel, series & parallel)TopologyInput voltage rangeTopology (buck, boost)Current Matching RequirementsTopology (series, parallel)Efficiency Requirement

SHORT FORM DESCRIPTIONThe TLC5940 is a 16 channel constant-current sink LED Driver. Each channel offers individually adjustable 4096-step (12-bit) grayscale PWM brightness control and 64-step constant current sink (dot-correction). EEPROM is integrated into the IC. Industry leading channel-to-channel accuracy and chip-to-chip accuracy improves display quality. Multiple devices can be cascaded serially to allow for full control through a single GPIO.The TLC5940 features two error information circuits. The LED Open Detection (LOD) indicates a broken or disconnected LED at an output terminal. The Thermal Error Flag (TEF) indicates an over-temperature condition.

WHY BOTHER / ADVANTAGES OVER COMPETITIONThe TLC5940 is the leading product of its kind on the market, offering the highest level of integrated functionality on the market. Key advantages over the competition are as follows:12-bit PWM Grayscale improves pictures quality through 4096 steps of shading per LED6-bit Dot-Correction allows uniform display brightness through dynamic current controlIntegrated EEPROM only LED Driver in the market with integrated EEPROM30MHz Data transfer rate no LED driver offers faster data transfer rateProtection: LOD & TEF integrated system diagnosticsChannel to Channel of 1% typ Industry leading accuracyChip to Chip Accuracy of 2.7% typ Industry leading accuracy120mA Peak Current/Channel Highest peak current/channel for a driver with this type of funct.Small QFN Package smallest package in the industry; excellent for displays with tight pixel pitchAdd Note Page Text here. Put in writing what will be said at the live presentation. Write so that people who could not be at the live session will get all of the information presented. Add Note Page Text here. Put in writing what will be said at the live presentation. Write so that people who could not be at the live session will get all of the information presented. SHORT-FORM DESCRIPTION The TPS6104x series of low-power DC/DC boost converters features an output voltage up to 28V from an input voltage in the range of 1.8V to 6.0V. Both TPS61040 (400-mA switch limit) and TPS61041 (250-mA switch limit) feature an efficiency greater than 85%, low 28-uA quiescent current, space-saving SOT-23 package and are ideal for LCD bias and white LED backlight applications. WHY WAS THIS PRODUCT DEVELOPED? The TPS61040/1 marks TIs entry point into the huge and fast-growing market for LCD and white LED backlight supplies. Up to now TI didnt offer a device that could step up a voltage to this level. The TPS61040/1 fills a gap in the portfolio and was originally developed to take share from the pin-compatible LT1615. More advanced TPS6104x devices will follow.OTHER SOLUTIONS & HOW TO SELL A couple of LTC and Maxim devices (LT1615/1613/1930, MAX1605 all ~$1.70/1ku) are already existing in the market for these applications. You will also occasionally encounter the Microsemi LX1992 controller (external FET), Toko TK11850 or On Semi NCP1403. However, the TPS61040/1 features a very competitive combination of highest efficiency and low quiescent current out of a SOT-23 package, coupled with the need for only very small inductors and capacitors which enables the most cost-efficient and smallest implementations. Flexibility for component selection is very high. For lower power applications TPS61041 works with smaller inductor values and a 100-nF cap. Competition may require >1F. To compete, win the socket first or displace existing solutions meeting the competitions solution price with the aggressive TPS6104x pricing (100ku @ ~ $0.70). Also offer the EVM to facilitate the design.FACTORY Contacts Product Marketing - Patrick Heyer +1 214 480 3444Product Space Champion Guenter Sporer+49 (0) 8161 80-4047 SHORT-FORM DESCRIPTION The TPS6104x series of low-power DC/DC boost converters features an output voltage up to 28V from an input voltage in the range of 1.8V to 6.0V. Both TPS61040 (400-mA switch limit) and TPS61041 (250-mA switch limit) feature an efficiency greater than 85%, low 28-uA quiescent current, space-saving SOT-23 package and are ideal for LCD bias and white LED backlight applications. WHY WAS THIS PRODUCT DEVELOPED? The TPS61040/1 marks TIs entry point into the huge and fast-growing market for LCD and white LED backlight supplies. Up to now TI didnt offer a device that could step up a voltage to this level. The TPS61040/1 fills a gap in the portfolio and was originally developed to take share from the pin-compatible LT1615. More advanced TPS6104x devices will follow.OTHER SOLUTIONS & HOW TO SELL A couple of LTC and Maxim devices (LT1615/1613/1930, MAX1605 all ~$1.70/1ku) are already existing in the market for these applications. You will also occasionally encounter the Microsemi LX1992 controller (external FET), Toko TK11850 or On Semi NCP1403. However, the TPS61040/1 features a very competitive combination of highest efficiency and low quiescent current out of a SOT-23 package, coupled with the need for only very small inductors and capacitors which enables the most cost-efficient and smallest implementations. Flexibility for component selection is very high. For lower power applications TPS61041 works with smaller inductor values and a 100-nF cap. Competition may require >1F. To compete, win the socket first or displace existing solutions meeting the competitions solution price with the aggressive TPS6104x pricing (100ku @ ~ $0.70). Also offer the EVM to facilitate the design.FACTORY Contacts Product Marketing - Patrick Heyer +1 214 480 3444Product Space Champion Guenter Sporer+49 (0) 8161 80-4047 SHORT-FORM DESCRIPTION The TPS6104x series of low-power DC/DC boost converters features an output voltage up to 28V from an input voltage in the range of 1.8V to 6.0V. Both TPS61040 (400-mA switch limit) and TPS61041 (250-mA switch limit) feature an efficiency greater than 85%, low 28-uA quiescent current, space-saving SOT-23 package and are ideal for LCD bias and white LED backlight applications. WHY WAS THIS PRODUCT DEVELOPED? The TPS61040/1 marks TIs entry point into the huge and fast-growing market for LCD and white LED backlight supplies. Up to now TI didnt offer a device that could step up a voltage to this level. The TPS61040/1 fills a gap in the portfolio and was originally developed to take share from the pin-compatible LT1615. More advanced TPS6104x devices will follow.OTHER SOLUTIONS & HOW TO SELL A couple of LTC and Maxim devices (LT1615/1613/1930, MAX1605 all ~$1.70/1ku) are already existing in the market for these applications. You will also occasionally encounter the Microsemi LX1992 controller (external FET), Toko TK11850 or On Semi NCP1403. However, the TPS61040/1 features a very competitive combination of highest efficiency and low quiescent current out of a SOT-23 package, coupled with the need for only very small inductors and capacitors which enables the most cost-efficient and smallest implementations. Flexibility for component selection is very high. For lower power applications TPS61041 works with smaller inductor values and a 100-nF cap. Competition may require >1F. To compete, win the socket first or displace existing solutions meeting the competitions solution price with the aggressive TPS6104x pricing (100ku @ ~ $0.70). Also offer the EVM to facilitate the design.FACTORY Contacts Product Marketing - Patrick Heyer +1 214 480 3444Product Space Champion Guenter Sporer+49 (0) 8161 80-4047