1. www.zetex.com Zetex Lighting Solutions June 2007

2. www.zetex.com 2 Agenda Lighting –LED Lighting –Applications - today and tomorrow –What is required for LED drive –Zetex Lighting Solution High Power LED Drivers- Integrated Switches – High Current –ZXLD13xx Summary –ZXLD1360 Introduction Portable applications Part I - External switch –Portable LED Driver Solution Overview –ZXSC310 Solution –ZXSC380 Solution –ZXSC400 Solution Design Tools

3. www.zetex.com 3 LED Applications - Overview Illumination - General, Object/Task, Decorative, Home/Garden, Commercial/Industrial, Indoor/Outdoor… Emergency and security - Signage, Torch, Hazard flash lights, Emergency lights… Signage - General, Traffic lights and signs… Portables - Camera/Mobile Backlight, Torch/Flash, Effect, Projector, Toys… Displays - LED displays, Backlight, Projector, RGB Direct TV etc Architectural and Effect - Colour, Patterns, Mood lighting, Bridges/Monuments/Buildings, Addressable RGB points etc Street lights Automotive Many more… All pictures copyright acknowledge

4. www.zetex.com 4 ZXSC300 / 310ZXLD1350 ZXLD1360 ZXLD400 / 1350 ZXLD1575ZXSC380 SAVING POWER Converting opportunities in real products

5. www.zetex.com 5 Demanding applications in progress ZXSC1350ZXLD1360 ZXLD1362

6. www.zetex.com 6 Programmable LED current High efficiency: 94% –Low 100mV feedback voltage for high efficiency –<5µA shutdown current Simple to use Space efficient Adds value to the LED –Dimming –Thermal control –Good EMC –Robust –Copes with the VF variation of the LED LED Drivers are responsible for driving the CURRENT through the LED! Anything else is an artifact you do not want… Characteristics of a Good LED Driver

7. www.zetex.com 7 Zetex LED Driver ICs Portable Lighting ICs – LED Controllers (Requiring External Switch) ZXSC3xx / 4xx series –Boost LED Driver: ZXLD11xx /19xx series/ZXSC38x –Boost converters for LCD / OLED bias: ZXLB16xx / ZXLD16xx series –Charge-Pump LED Driver for Mobile Phone Backlight: ZXLD1575 Mid Voltage Range for High Power LED Device Vin Switch LED Current/Vout Topology ZXSC3xx 0.8 – 8V External Switch dependent Boost ZXSC4xx 1.8 – 10V External Switch dependent Boost*** ZXLD 1350 7 – 30V* Internal 350mA/<30V Buck ZXLD 1360 7– 30V* Internal 1000mA/<30V Buck ZXLD 1362 7 – 60V** Internal 1000mA/ <60V Buck * Transient capability 40V for 0.5s ** Transient capability 65V for 0.5s *** Can also be operated in buck, buck-boost mode

8. www.zetex.com 8 LED Lighting Solutions LCD- Small and Medium Screens, Portable LCD - Large Screens, Illumination, Architectural, Emergency and Security, Portable, Signage, Automotive etc OLEDs - Hand Portable Equipment ZXLB1600 ZXLD1601 ZXLD1615 ZXLD1101 ZXLD1937 ZXSC300: External switch ZXSC400: External switch ZXLD1350: Vin 30V Iout 350mA ZXLD1360: Vin 30V Iout 1A ZXLD1362: Vin 60V, Iout1A ZXLB1600 ZXLD1601 ZXLD1615 Zetex ASSP LED Products All Photographs Copyright Acknowledged

9. www.zetex.com 9 High Power LED Drivers ZXLD13xx Buck LED Driver ICs – Integrated switch Typical Application circuit Key Features ZXLD1350, ZXLD1360, ZXLD1362… Wide input voltage –ZXLD1350, ZXLD1360: 7V to 30V –ZXLD1362: 7V to 60V Internal NDMOS Switch High LED Current –ZXLD1350: Up to 350mA –ZXLD1360/2: Up to 1000mA Can drive series connected LEDs –ZXLD1350: Up to 8 series connected 1WLEds –ZXLD1360 Up to 8 series connected 3WLEds –ZXLD1362: Up to 16 series connected 3WLEds Low quiescent current ZXLD1350: 250uA typ. Low shutdown current –ZXLD1350: 20uA max –ZXLD1360: 40uA max Brightness control: DC or PWM dimming Internal filter Optional soft-start Up to 1Mhz switching frequency Sense resistor Rs: ZXLD1350: 0.3  ; ZXLD1360/62: 0.1  Schottky diode SD1 ZXLD1350: ZHCS1000/ZXLLS1000 Applications General illuminations - Low voltage halogen replacement, industrial lighting etc Automotive LED backlighting for LCD Signage

10. www.zetex.com 10 High Power LED Driver ICs with Integrated Switch - ZXLD13xx Comparison ZXLD1350 ZXLD1360 ZXLD1362 LX Pin drive current 370mA 1 Amp 1A LX on resistance 1.5Ω 0.5Ω 0.5Ω Supply voltage7- 30V 7- 30V 7- 60V Transient capability40V 0.5 sec 40V 0.5 sec 65V 0.5 sec Minimum Sense resistor0R33 0R1 0R1 Package Dissipation450mW 1000mW1000mW Output power capability8 Watts 24 Watts 48 Watts Regulator starts up @ 4.8 Volts 5.6 Volts5.6 Volts Adjust pin clampNo Yes, 1.35V Yes, 1.35V Low Pass Filter4kHz 4kHz 600kHz Switching freq1Mhz 1Mhz1MHz Excel CalculatorYes Yes Yes StatusReleased Released Q3 2007

11. www.zetex.com 11 ZXLD1360 1 Amp LED driver features Low part count 1 Amp output current 7 to 30 Volt operation Adjust pin for DC or PWM current control In-built soft start which can be extended Low value inductors 1 Watt TSOT 23-5 package Can be shut down for power saving Drive capability - 24 watts (8 LEDs in series) Pin compatible with ZXLD1350 Under voltage lockout (5.5V) Leakage current protected ADJ pin

12. www.zetex.com 12 Basic circuit configuration Vin 7 to 30V Inductor - typical value for 2 K2 LEDs at 1A from 12V supply – 33uH will oscillate around 450kHz Input capacitor needs to be 4.7uF X7R Schottky diode needs to be low leakage and high power rated

13. www.zetex.com 13 LED Drivers ICs Portable Applications DeviceVin Vout Switch Vfb &or IsensePkg ZXLB1600 1.6 - 5.5V Vin to 28V Internal 1.23 MSOP10 ZXLD1100 * 2.5 – 5.5V to 28V Internal 100mVSC70-6 ZXLD1101 2.5 – 5.5V 28V max Internal 100mVTSOT23-5 ZXLD1937 2.5 – 5.5V 28V max Internal 100mVTSOT23-5 ZXLD1575 2.7 – 5.5V 5.5V InternalQFN16 ZXLD1601 * 2.5 - 5.5V to 28V ** Internal 1V SC70-6 ZXLD1615 2.5 -5.5V Vin to 28V Internal 1VTSOT23 ZXSC380 0.8 - 6V Vin to 20V Internal 20mVSOT23 ZXSC300/310 0.8 – 8V - External NA / 20mVSOT23-5 ZXSC400 0.8 – 10V - External 20mV/300mVSOT23-6 * Open load protected ** Default value but can be programmed for lower output value

14. www.zetex.com 14 Simple Solution, output current tapers down as input voltage falls LED Current not fed back to controller Switch current is monitored Key Features Boost controller Very high efficiency: >80% 0.8V to 8V input voltage Constant power drive Small size: SOT23-5 Simple circuit – low part counts Low cost and easy to use Many reference designs available ZXSC310 Solution Single AA Cell to 1W Solution

15. www.zetex.com 15 Very simple solution, output current tapers down as input voltage falls Target market – toys, flashlights, garden lighting LED current not fed back to controller Switch current is monitored ZXSC380 Solution Overview Key features: Very high efficiency: >80% 0.8V to 6V input voltage –– single cell operation capable 200mA integrated switch Constant power drive to LED Small size: SOT23 Simple circuit – low parts count Low cost Reference designs and evaluation boards available Key applications: LED solar garden lights and effects Toys, Instruments etc Single cell applications

16. www.zetex.com 16 ZXSC400 Solution Overview Simple Solution drive multiple LEDs Regulates LED current Key Features Simple boost controller Very high efficiency: >80% 1.8V to 8V input voltage Regulated LED current: ±3% Constant power drive to LED Small size: SOT23-6 Dual Transistor and Schottky combination available Can be configured in buck, buck-boost mode also Simple low cost circuit – low part counts Many reference designs available

17. www.zetex.com 17 Design Tools –Standard and ASSP ICs and building block Datasheet and brochures – pdf, web –Samples –Application and design notes –Reference designs –Demonstration boards –Spice models –Design calculators –Package and environmental information –Related websites and documents –Exhibition panels –Zetex application engineers –www.zetex.comwww.zetex.com

18. 18 Lighting Evaluation Boards Product Part NumberDescriptionEV Order Number ZXLB1600X10ZXLB1600 LCD & OLED Bias#ZXLB1600EV1 ZXLD1100H6ZXLD1100 LED driver board#ZXLD1100EV1 ZXLD1100H6Mobile LED Flash Unit - Osram LED#ZXLD1100EV2 ZXLD1615ET5ZXLD1615 LCD & OLED Bias#ZXLD1615EV1 ZXLD1937ET5ZXLD1937 LED driver boards#ZXLD1937EV1 ZXSC310E5ZXSC310 25mA LED driver board#ZXSC310EV1 ZXSC410EV1ZXSC410 DC-DC 5V/100mA Output#ZXSC410EV1 ZXSC400E225W LED Driver Vin 24V I out 350mA boost#ZXSC400EV2 ZXSC400E41W LED Driver - Osram LED#ZXSC400EV4 ZXSC400E6ZXSC400 LED 25mA 2 cell driver board#ZXSC400EV1 ZXSC400E625W LED Driver Vin 24V I out 350mA boost#ZXSC400EV2 ZXSC400E61W LED Driver - Lumileds LED#ZXSC400EV3 ZXSC440X8ZXSC440 Photoflash Charger#ZXSC440EV1

19. www.zetex.com 19 Lighting Evaluation Boards Product Part NumberDescriptionEV Order Number ZXLD1350EV23 X 1W LED Driver – step down 30V#ZXLD1350EV2 ZXLD1350EV43 X 1W LED Driver – step down 30V#ZXLD1350EV4 ZXLD1350EV6LED Driver – step down 30V no LEDs#ZXLD1350EV6 ZXLD1360EV11 X 3W LED Driver – step down 30V#ZXLD1360EV1 ZXLD1360EV2OSTAR with heat sink#ZXLD1360EV2

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