Powerharvester Selection Guide
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The document is a component selection guide for Powerharvester® receivers designed for low volume applications and prototyping, detailing two models: P1110 and P2110, which convert RF input to DC current with varying output voltage and ranges. It also discusses a chipset/reference design for high volume applications, showcasing its features, efficiency, and estimated bill of materials costs. Key specifications include RF harvesting capabilities from -12 dBm input and conversion efficiencies of up to 80%.
Powerharvester Selection Guide
- 2. Powerharvester® Receivers Low Volume Applications and Prototyping Convert RF input to DC current Power/charge management Power RF P1110 I/O Frequency range: 850-950MHz RSSI and Data output RF P2110 Power I/O Designed for 50Ω antennas 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 over-voltage) (configurable and regulated) • Range of at least 3 meters • Range of at least 10 meters
- 3. 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
- 4. High-Efficiency, Wide Operating Range 80 RF-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)
- 5. Component Selection Battery Regulated Output Max RF Input Charging Output Voltage Operating Power Range Distance3 (dBm) P1110 Yes No2 0 - 4.2V 10 feet -5 to 20 Continuous P2110 Yes1 Yes 2 - 5V 40 feet -11 to 10 (Standard) Intermittent6 P2110 Yes1 Yes 2 - 5V 10 feet -5 to 20 (High power)4 Continuous5 Notes: 1. Additional circuitry required (see BAT-EVAL-01 schematic) http://www.powercastco.com/PDF/BAT-EVAL-01-Rev0A-Schematic.pdf 2. Supports configurable over-voltage protection up to 4.2V 3. Based on a 3W source and 6dBi receiving antenna 4. High power version currently only available as a licensed reference design 5. May become intermittent for high load currents or longer ranges 6. May become continuous in close proximity for low load currents