Powercast Overview - RF Energy Harvesting and Wireless Power for Micro-Power Applications

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Overview of Powercast technology, products, and applications - wireless power and RF energy harvesting

Overview of Powercast technology, products, and applications - wireless power and RF energy harvesting

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  • 60 deg beam pattern

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  • 1. RF Energy Harvesting and Wireless Power for Low-Power ApplicationsEmerging P2100 TX91501 P2110 P2110Technology Powerharvester® Powercaster® Powerharvester® Powerharvester® www.powercastco.com ©2012 Powercast Corporation April 6 2012 1
  • 2. Powercast Technology Overview• Micro-power over distance using common radio waves – Microwatts (µW) to low milliwatts (mW)• Micro-power is useful for: RF Source Powercast Enabled – Trickle-charging batteries Devices – Powering battery-free devices• Received power is determined by multiple factors: – Power of RF source – Distance from RF source – Size / performance of receiving antenna – Transmission frequency (e.g. 915MHz) www.powercastco.com ©2012 Powercast Corporation 2
  • 3. Why RF-based Wireless Power?Industrial Minimizes Operating Costs Eliminates cost to hard wire or replace batteries – e.g. wireless sensors Eliminates service downtime caused by depleted batteries Reduces battery handling and disposalOEMs Improved Product Design Sealed devices – less expensive enclosures and manufacturing Embedded power – eliminate wires, cables, connectors Reliability – improved durability, reduced product failures, eliminate ESDEnd-Users Convenience and Usability Placement flexibility – no charging mats or charging stations Transparent charging – no user action required Embedded power – eliminate wires, cables, connectors www.powercastco.com ©2012 Powercast Corporation 3
  • 4. Perspective: Communication vs. Power RF Sensitivity of Wireless DevicesPower Requirement mA Communication uA Wake-up Receiver 0 - nA Power Harvesting -100 -75 -50 -25 0 Input Power (dBm) www.powercastco.com ©2012 Powercast Corporation 4
  • 5. RF Power SourcesIntentional Anticipated Unknown ? www.powercastco.com ©2012 Powercast Corporation 5
  • 6. Average Power Consumption Recommended Power Profiles Recommended Profiles for RF-based Wireless Power Low-power Wireless Sensors Hours Days Weeks Months Years Battery Run Time www.powercastco.com ©2012 Powercast Corporation 6
  • 7. Full Suite of Wireless RF SolutionsPowerharvesters RF• Modules Transmitters• Chipset• License Evaluation Engineering Boards Services Development Kits www.powercastco.com ©2012 Powercast Corporation 7
  • 8. Powercast Technology Advantages 80 High efficiency over a broad range 70  Load resistance RF to DC Conversion Efficiency 60  Input power 50  Recharging current 40 (%) No Maximum Power Point Tracking 30 (MPPT) required 20 Example of other solutions 10 Over 850 MHz operating bandwidth 0  Essential for ambient energy harvesting -5 0 5 Input Power (dBm) 10 15 20  Easy scalability for geographic regions P2110 Harvester Efficiency -3dBm (500uW) Input, 1V Load using different frequencies 1.2 1.2 Normalized Efficiency 1.0 1 Normalized Efficiency Result … 0.8 0.8  Better performance 0.6 0.6 0.4 0.4  More power 0.2 0.2  Simplified design-in 0 0 500 500 700 700 900 900 1100 1100 1300 1300 1500 1500 1700 1700 Frequency (MHz) Frequency (MHz) www.powercastco.com ©2012 Powercast Corporation 8
  • 9. Powerharvester® Receivers Low Volume Applications and Prototyping Convert RF input to DC current Power Power/charge management RF I/O Frequency range: 850-950MHz RSSI and Data output RF Power I/O Designed for standard 50Ω antennas Capacitor P1110 P2110 Continuous Power Output Pulsed Power Output• RF range: -5.0dBm to 20dBm • RF range: -11.5dBm to 15dBm• Output voltage: 1.8V to 4.2V • Output voltage: 1.8V to 5.25V (configurable) (configurable and regulated)• Range of at least 3 meters • Range of at least 10 meters www.powercastco.com ©2012 Powercast Corporation 9
  • 10. Powerharvester® Performance Comparison 80RF-to-DC Conversion Efficiency (%) P1110 - 915MHz, 3V 70 P2110 - 915MHz, 1.05V Power 60 50 40 30 20 10 Distance 0 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 Input Power (dBm) www.powercastco.com ©2012 Powercast Corporation 10
  • 11. Bandwidth Increases with Received Power P2110 Harvester Efficiency -3dBm (500uW) Input, 1V Load 1.2 1Normalized Efficiency 0.8 0.6 ±20% over 850MHz 0.4 0.2 0 500 700 900 1100 1300 1500 1700 Frequency (MHz) www.powercastco.com ©2012 Powercast Corporation 11
  • 12. Powerharvester® Chipset / Reference Design High Volume Applications Flexible implementation Output from 2 to 5V (higher with custom design) Wide tunable range: 1MHz to 6GHz RF harvesting down to around -12dBm input Same performance as P1110 / P2110 Estimated BOM: $5-6 @ 3K, $3-5 @100K, <$2 @1M+ Reference designs available for license RF Harvesting Circuit • Powercast chipset (3 custom ICs) • 20-25 other discrete components • Small footprint: 0.2 in2 / 1.3 cm2 www.powercastco.com ©2012 Powercast Corporation 12
  • 13. TX91501 Powercaster® Transmitter 6.25” width • 915 MHz center frequency • FCC and IC certified • RoHS compliant • DSSS modulation (power) • ASK modulation (data)6.75” • 1W or 3W EIRPheight – TX91501-1W-ID – TX91501-3W-ID • ~60 beam pattern • Data broadcast (factory-set) • Plug-and-play installation1.63” depth • Powers virtually unlimited number of Powerharvesters Power Jacks (2) – 5V Status Indicator LED Back – for tabletop placement Green – Transmitting • Design available for license Bottom – for wall mounting Red – Fault Condition www.powercastco.com ©2012 Powercast Corporation 13
  • 14. Lifetime Power® Development Kits P2110-EVAL-01 P2110-EVAL-02 Complete system for battery-free  Complete system for wireless battery wireless applications charging  Jointly developed with Microchip  Developed in conjunction with Infinite  Designed for wireless sensing applications Power Solutions using MiWi protocol  Features IPS THINERGY® Energy Cell • RF Transmitter (TX91501) • RF Transmitter (TX91501) • (2) P2110 Evaluation Boards (P2110-EVB) • P2110 Evaluation Boards (P2110-EVB) • (2) 6dBi Directional Antennas • 6dBi Directional Antenna • 1dBi Omni-directional Antenna • (2) 1dBi Omni-directional Antennas • Battery Charging Board (BAT-EVAL-01) • (2) Wireless Sensor Boards (WSN-EVAL-01) • THINERGY® Micro-Energy Cell Evaluation Card • Microchip 16-bit XLP Development Board • Cable for connecting to THINERGY® ADP • Microchip MRF24J40 PICtail/PICtail Plus • TI eZ430-RF2500 Wireless Development Tool daughter card • Microchip PIC-kit 3 programmer/debugger www.powercastco.com ©2012 Powercast Corporation 14
  • 15. Intentional Transmitter PoweruW Available Power Before Conversion (Estimated)18016014012010080 3W EIRP Transmitter 915MHz60 6 dBi Receiver40 Antenna20 0 0 5 10 15 20 25 30 Distance (meters) www.powercastco.com ©2012 Powercast Corporation 15
  • 16. Intentional Transmitter CoverageCoverage Area – 3W transmitter (TX91501)@ 60 feet ≈ 1900 ft2@ 80 feet ≈ 3300 ft2Average ≈ 2500 ft2 60 ft 80 ft Effective range increases with improved RF sensitivity of the receiver and antenna performance www.powercastco.com ©2012 Powercast Corporation 16
  • 17. Ambient Wi-Fi PoweruW400 Available Power Before Conversion (Estimated)350300 50mW250200 0 dBi150 6 dBi ~4uW Receiver100 Antenna50 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Distance (meters) www.powercastco.com ©2012 Powercast Corporation 17
  • 18. Applications: High-Function RFIDHarvest additional RF power for enhanced functionality • Identification • Sensors • ePaper display RFID Sensor Tags • Battery charging • Low-power radio RFID • LEDsReader • Buzzer High-Function Tag ePaper Signs / LabelsPowercast receivers provides 10X the power vs. traditional RFID chips www.powercastco.com ©2012 Powercast Corporation 18
  • 19. Applications: Wireless SensorsBuilding Automation Structural Monitoring Defense Data Centers Security Industrial Monitoring Energy Management Smart Grid www.powercastco.com ©2012 Powercast Corporation 19
  • 20. Applications: Bulk Trickle Charging  Freedom of placement  Eliminate wires and connectors  Automatic/transparent charging  Multiple battery types/chemistry www.powercastco.com ©2012 Powercast Corporation 20
  • 21. Applications: Consumer ElectronicsMice / Keyboards Game Controllers Media RemotesAudio / Headsets Health / Fitness Low-power Displays mWs to 3ft / >100uW to 10ft www.powercastco.com ©2012 Powercast Corporation 21
  • 22. Wireless Power Calculator • Quick Power Estimates • Available Online • Simple to Use http://www.powercastco.com/power-calculator/ www.powercastco.com ©2012 Powercast Corporation 22
  • 23. For More Informationwww.powercastco.com www.powercastco.com ©2012 Powercast Corporation 23