The document discusses an LED solar garden lighting solution from STMicroelectronics. It provides an overview of different types of garden lights, solar cells, batteries, LED drivers, and other components. The solution involves using LED lights powered by a solar panel and rechargeable battery system with an LED driver circuit to control the lights.

1. LED Solar Garden Lighting Solution From STMicroelectronics

2. Agenda Purpose Solution for LED Solar Garden Lighting from STMicroelectronics Outline Different Types of Garden Lights Types of Silicon Solar Cells, Solar Battery Charging system Overview of Current Battery Technology, Primary and Rechargeable Simple LED Driver Circuit, Analog and Digital LED Driver Garden Lighting Solution From STMicroelectronics Content 23 pages

3. Different Types of Garden Lights Spotlights : To light certain details or features in the garden you can choose spotlights. These spotlights can be directed and are available in various models and materials Uplights/Orientation lighting: Another way to illuminate certain features is to apply uplights, fittings which illuminate details from a fixed position. (e.g. from the ground) Post lighting: Straight standing lighting can be placed along pathways, on lawns and between plants. These models are available with halogen lamps, light bulbs and LED’s Wall lighting: Wall lighting is fitted with LED or halogen lightsource. Simple to fix to fences/walls etc.

4. Solar Cells Convert solar energy into electricity Typical efficiency of 50-100mW/in2 Useful in recharging batteries at remote locations Limited by availability of direct sunlight, size, and fragility Solar cells are often electrically connected and encapsulated as a module Batteries are used to store the energy that is not needed immediately.

5. Types of Silicon Solar Cells Indirect semiconductor efficiency: 20 % lifetime: 25-30 years Indirect semiconductor efficiency: 15 % lifetime: 25-30 years Indirect semiconductor efficiency: 8 % only short range order

6. Solar Battery Charging System Block Diagram of Solar Battery Charging system

7. Overview of Current Battery Technology Two Types of Batteries Primary Rechargeable Different Types of Primary Batteries Carbon-Zinc Alkaline Silver Oxide Zinc Air (ZiO2) Lithium (LiFeS2 and LiMnO2) Different Types of Rechargeable Batteries NiCad NiMH Li-Ion

8. Comparison of Primary Battery Types Chemistry Cell Voltage (V) Cell Capacity (mAh) Gravimetric Energy Density (WHr/kg) Volumetric Energy Density (WHr/l) Capacity loss per YEAR (@ 20C) Carbon- Zinc 1.5 10 - 5000 105-195 100-180 5% Alkaline 1.5 10 - 5000 125-225 150-440 4% Silver Oxide 1.5 5-200 155-285 250-500 3% Zinc Air 1.4 30-1000 245-455 470-1450 5% (sealed) Lithium 1.5, 3.0 10 - 3000 32-260 340-500 1%

9. Comparison of Rechargeable Battery Types

10. Simple LED Driver Circuit

11. Analog LED Driver Block Diagram of LED Driver: Analog AC IN Bridge Rectifier Power Factor Correction Buck / Boost Controller DC / DC Converter Dimming control Input LED String

12. Digital LED Driver Block Diagram of LED Driver: Digital AC IN Bridge Rectifier Voltage Regulator MCU MOSFET Gate Driver LED String MOSFET Gate Driver MOSFET Gate Driver ADC PWM LIN / CAN Transceiver and Connectivity Brake Lights Rear Lights Fog Lamps

13. PWM Dimming Control Many portable LED applications require Dimming i.e. brightness control. In applications such as LCD backlighting, dimming provides brightness and contrast adjustment. Two types of dimming are available: 1) Analog 2) PWM method With analog dimming, 50% brightness is achieved by applying 50% of the maximum current to the LED PWM dimming is achieved by applying full current to the LED at a reduced duty cycle. For 50% brightness, full current is applied at a 50% duty cycle. The Frequency of the PWM signal must be above 100 Hz to ensure that the PWM pulsing is not visible to the human eye To provide the most flexibility and ease of integration, the LED driver should be able to accept PWM frequencies as high as 50 kHz. PWM Signal

14. Garden Lighting Solution From STMicroelectronics 10W Dimmable LEDs driver board layout

15. Light Sources Higher energy efficiency, in terms of lumens per watt Direct light beam for increasing system performance Dynamic colour control technology Full dimmable without colour variation No mercury and no UV or heat in light beam Low voltage operation, suitable for safety purpose in SELV systems.

16. Schematic Diagram for VIPer22A-E

17. Dimming Control Circuit Dimming technique using series switch Dimming technique using the new methodology

18. High Power LED Selection Guide Manufacturer Part Number Farnell # Newark # Color Lumen (lm) Viewing Angle VF (V) P_rating Avago ADJD-WM40-NKKZ0 1618704 58M3623 Cool White 60 110° 4 12*1W Avago ASMT-JN11-NST01 1698191 71P7899 Neutral White 65 140 3.5 1W Avago ASMT-MW00-NJKZ0 1618674 58M3698 Cool White 73 120° 4 1W Avago ASMT-JN31-NTV01 1718401 14R8743 Neutral White 150 140° 4.3 3W Cree MCE4WT-A2-0000-000M01 1688706 40P1429 Cool White 430 110° 3.9 3W Cree XR7090WT-G1-0003 1440711 59M3595 White 57 100° 4 3W Cree XREWHT-L1-0000-006E6 1440723 59M3588 Neutral White 62 90° 3.5 4W OPTEK OVSPWBCR4 1498003 29M9862 White 75 120° 3.6 1W OPTEK OVSPWBCR44 1498004RL 45M7033 White 52 60° 2.8 1W OPTEK OVTL01LGAWWS 1498017 27M3299 Warm White 30 135° 3.7 1W OSRAM DP3-W3-733 1472632 61M5860 Warm White 20° 3.6W OSRAM DX1-W3-733-L30W 1472644 61M5937 Warm White 30° 1.2W OSRAM LECWE2A-LYNX-URVU 1680588 33P7257 Warm White 230 120° 16.4 4*4.5W OSRAM LECWE2B-MZPY-MRNU 1680592 33P7262 Warm White 240 130° 16.4 4*4.5W Lumileds LXHL-BW02 1106643 93K5789 Cool White 45 110° 3.99 1W Lumileds LXHL-PW01 1106548 93K5864 Cool White 45 140° 3.99 1W Lumileds LXML-PWC1-0100 1555331 08N2482 Cool White 100 140° 3.15 3W CML Innovative Technologies ILL3A0004I 1228926 05M0419 Warm White 120 25° 3*3W CML Innovative Technologies ILL3B0001I 1228892 05M0377 White 40 50° 3W Weldon Technologies 9900-1201-371 1649503 89M5420 White 80 110° 4.1 1W Lumex SML-LX1610UWC 1325163 22M4357 White 30 70° 3.5 1W Lumidrives LK1-1-W 1242360 20M5533 Cool White 45 3.42 1W

19. MCU Selection Guide Manufacturer Part Number Farnell # Newark # Description Flash (KB) RAM (Byte) I/O ADC Clock (MHz) Atmel ATTINY10-TSHR 1748538 26R5645 MCU, 8Bit, AVR, 1K Flash, 6SOT-23 1 32 4 4 12 Atmel ATTINY13-20PU 9171550 96K6521 8Bit1K Flash MCU, DIP8 1 64 6 4 20 Atmel ATTINY13-20SSU 1455133 58M3771 AVR MCU, 1K Flash, 64B RAM, SOIC8 1 64 6 4 20 Atmel ATTINY13A-MMU 1715516 15R0298 MCU, 8Bit, AVR, 1K Flash, 10MLF 1 64 6 4 20 Atmel ATTINY13V-10PU 9171576 96K6523 8Bit 1K Flash MCU, DIP8 1 64 6 4 10 Atmel ATTINY25-20PU 1455142 58M3778 AVR MCU, 2K Flash, 128B RAM, DIP8 2 128 6 4 20 Atmel ATTINY45-20PU 1288352 23M5072 8Bit MCU, 4K Flash, 5V, PDIP8 4 256 6 4 20 Freescale MC68HC908QT4CPE 8613567 25K5943 8Bit MCU 4K Flash, ADC, 68HC908 4 128 5 4 12.8 Freescale MC68HC908QY4CPE 8613656 25K5959 8Bit MCU 4K Flash, ADC, 68HC908 4 128 13 4 12.8 Freescale MC908GR4CDWE 1148422 62K5279 8Bit MCU 4K Flash, 908GR4, SOIC28 4 384 17 4 8 Freescale MC9S08QD2CPC 1579711 22M5760 MCU, 8Bit, 2K Flash PDIP8 2 128 4 4 16 Microchip PIC18F1230-I/P 1332230 88K5938 8Bit Flash MCU, SMD, 18F1230, DIP18 4 256 16 4 8 Microchip PIC18F1230-I/SO 1332231 34M8009 8Bit Flash MCU, SMD, 18F1230, SOIC18 4 256 16 4 8 ST STM32F101R6T6 1447628 59M2177 32-Bit MCU,SMD,32K Flash 32 6K 51 2 36

20. Battery Charger Selection Guide Manufacturer Part Number Farnell # Newark # Description I_out (A) Output(V) Dimension (mm) L*W*H ICP Solar Tec CC-10000 1702992 10R2868 Charge Controller, 10A, Sunsei 10 +12/24V 70*57*28 ICP Solar Tec CC-25000 1702994 10R7222 Charge Controller, 25A, Sunsei 25 +12/24V 101.6*79.5*35.1 ICP Solar Tec SE-CC25 1096183 Charge Controller, 25A, Sunsei 25 +12/24V -- RALOSS CMP-10A 1462503 58M4322 Charge Controller, 10A, Sunsei 10 +24V -- RALOSS CMP-20A 1462504 58M4323 Charge Controller, 20A, Sunsei 20 +24V --

21. Lead-acid Battery Selection Guide Manufacturer Part Number Farnell # Newark # Description Capacity(Ah) Output(V) Dimension (mm) L*W*H Hawker Energy 9800-0115 1218984 Battery,12V,5AH,2X3,S/W LDS 5 +12 133*90*77 Hawker Energy 9819-0020 1218977 Battery,12V,2.5AH,2X3,CYCLON 2.5 +12 113*90*70 Sonnenschein A512/1.2S 463401 Battery,12V,1.2AH 1.2 +12 97.5*51*49.5 Sonnenschein A512/40G 463486 Battery,12V,40AH 40 +12 210*175*175 Sonnenschein A512/65G 463498 Battery,12V,65AH 65 +12 353*190.175 Camden Electronics BEG120075 5085329 Battery,Europa+GEL,12V,7.5AH 7.5 +12 151*99*65 Camden Electronics BEG120120 5085330 Battery,Europa+GEL,12V,12AH 12 +12 150*100*97 Camden Electronics BEG120180 5085342 Battery,Europa+GEL,12V,18AH 18 +12 181*167*76 Enersys G12V13AH10EP 89C2821 Lead Acid Battery 13 +12 175.5*129.8*83.6 Enersys G12V26AH10EP 89C2825 Lead Acid Battery 26 +12 175.7*166.7*125.9 Dantona Industries LC-1217P 15C9863 Lead Acid Battery 17 +12 7.13''*6.57''*2.99'' Dantona Industries LC-LA1233P 15C9855 Lead Acid Battery 33 +12 7.7''*7.09''*5.12'' Dantona Industries LC-R127R2P1 14C4016 Lead Acid Battery 7 +12 5.95''*3.94''*2.54'' Dantona Industries LCRA1212P1 72C7107 Lead Acid Battery 12 +12 5.95''*3.9''*3.86'' Eaton Powerware PW5130N1750-EBM2U 50P9301 Lead Acid Battery 9 +12 441*509*86.2

22. Peripheral Selection Guide Farnell Newark Light Sensor Link Link MosFET Link Link Crystal Link Link LED Driver Link Link Capacitor Link Link Inductor Link Link Temperature Sensor Link Link

23. Additional Resource For ordering Solution Related Solution on LED Solar Garden Lighting , please click the part list or Call our sales hotline For more product information go to http://www.element-14.com/community/docs/DOC-18705/l/technology-primer--led-solar-garden-lighting-solution Visit Element 14 to post your question www.element-14.com For additional inquires contact our technical service hotline or even use our “Live Technical Chat” online facility Newark Farnell