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  Energy Harvester Produces Power from Local Environment, Eliminating Batteries in Wireless Sensors &mdash DN483
  PDF, 253 Kb, 档案已发布: Aug 3, 2010
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  Energy Harvester Produces Power from Local Environment,
  Eliminating Batteries in Wireless Sensors
  Design Note 483
  Jim Drew
  Introduction
  Recent advances in ultralow power microcontrollers
  have produced devices that offer unprecedented levels
  of integration for the amount of power they require to
  operate. These are systems on a chip with aggressive
  power saving schemes, such as shutting down power
  to idle functions. In fact, so little power is needed to run
  these devices that many sensors are going wireless,
  since they can readily run from batteries. Unfortunately,
  batteries must be regularly replaced, which is a costly
  and cumbersome maintenance project. A more effective
  wireless power solution may be to harvest ambient
  mechanical, thermal, or electro-magnetic energy in the
  sensor’s local environment. Ambient Energy Sources
  Ambient energy sources include light, heat differentials,
  vibrating beams, transmitted RF signals or any other
  source that can produce an electrical charge through a
  transducer. For instance, The LTC3588-1 shown in Figure 1 is a complete energy
  harvesting solution optimized for high impedance …

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  Energy Harvester Produces Power from Local Environment, Eliminating Batteries in Wireless Sensors &mdash LT Journal
  PDF, 1.3 Mb, 档案已发布: Apr 1, 2010
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  April 2010 I N T H I S I S S U E our new look 2 dual output step-down
  regulator with DCR sensing
  in a 5mmВ Г—В 5mm QFN 9 accurate battery gas Volume 20 Number 1 Energy Harvester Produces Power
  from Local Environment, Eliminating
  Batteries in Wireless Sensors
  Michael Whitaker gauges with I2C interface 12 dual buck regulator
  operates outside of
  AM radio band 20 eight 16-bit VOUT DACs in a
  4mm Г— 5mm QFN 24 Advances in low power technology are making it easier to create
  wireless sensor networks in a wide range of applications, from
  remote sensing to HVAC monitoring, asset tracking and industrial
  automation. The problem is that even wireless sensors require
  batteries that must be regularly replaced—a costly and cumbersome
  maintenance project. A better wireless power solution would be to
  harvest ambient mechanical, thermal or electromagnetic energy from
  the sensor’s local environment. dual-phase converter for
  1.2V at 50A with DCR
  sensing 28 Typically, harvestable ambient power is on the order of tens of microwatts, so energy harvesting
  requires careful power management in order to successfully capture microwatts of ambient power
  and store it in a useable energy reservoir. One common form of ambient energy is mechanical
  vibration energy, which can be caused by motors running in a factory,
  airflow across a fan blade or even by a moving vehicle. A piezoelectric transducer can be used to convert these forms of vibration energy
  into electrical energy, which in turn can be used to power circuitry. …

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  True Grid Independence: Robust Energy Harvesting System for Wireless Sensors Uses Piezoelectric Energy Harvesting Power Supply and Li-Poly Batteries with Shunt Charger &mdash LT Journal
  PDF, 936 Kb, 档案已发布: Oct 27, 2010
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  True Grid Independence: Robust Energy Harvesting System
  for Wireless Sensors Uses Piezoelectric Energy Harvesting
  Power Supply and Li-Poly Batteries with Shunt Charger
  George H. Barbehenn There is an emerging and potentially large market for wireless sensors. By their very
  nature, wireless sensors are chosen for use in inaccessible places, or for applications
  that require large numbers of sensors—too many to easily hardwire to a data network. In
  most cases, it is impractical for these systems to run off primary batteries. For example,
  a sensor for monitoring the temperature of meat as it is shipped would need to be
  mounted in a tamperproof way. Or, HVAC sensors that are mounted on every source of
  conditioned air would be far too distributed to feasibly use batteries. In these applications,
  energy harvesting can solve the problem of providing power without primary batteries.
  Energy harvesting alone often does not
  produce sufficient power to continuously run the sensor-transmitter—energy
  harvesting can produce about 1mW–10mW,
  where the active sensor-transmitter
  combination may need 100mW–250mW.
  Harvested energy must be stored when
  possible, ready for use by the sensor/transmitter, which must operate at duty cycle
  that does not exceed the energy storage COMPLETE ENERGY
  HARVESTING SYSTEM capabilities of the system. Likewise, the
  sensor/transmitter may need to operate
  at times when no energy is harvested. Figure 1 shows a complete system implementation using an LTC3588-1 energy
  harvester and buck regulator IC, two …

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• Power Management > Energy Harvesting

其他名称:

LTC3588IDD-1PBF, LTC3588IDD-1 PBF, LTC3588IDD1#PBF, LTC3588IDD 1#PBF