rev 2.1 ?2012 advanced linear devices, inc. 415 tasman drive, sunnyvale, ca 94089-1706 tel: (408) 747-1155 fax: (408) 747-1286 www.aldinc.com general description eh300/EH301 series epad ? energy harvesting tm modules can accept energy from many types of electrical energy sources and store this energy to power conventional 3.3v and 5.0v electrical circuits and systems. eh300/EH301 series modules are com- pletely self-powered and always in the active mode. they are intended for low power intermittent duty cycle sampled data or condition-based monitoring/ extreme lifespan applications. these modules can accept instantaneous input voltages ranging from 0.0v to +/-500v ac or dc, and input currents from 200na to 400ma from energy harvesting sources that produce electrical energy in either a steady or an intermittent and irregular manner with vary- ing source impedances. eh300/EH301 series modules condition the stored energy to provide power at output voltage and current levels that are within the limits of a particular electronic system power supply specifications. for example, 1.8v and 3.6v is a useful voltage range for many types of ic circuits, such as microproces- sors. eh300/EH301 series modules are designed to continuously and actively operate to capture, accumulate, and conserve energy from an external energy source. each individual eh300/EH301 series module is set to operate between two supply voltage thresholds, +v_low dc and +v_high dc, corresponding to the minimum (v l ) and maximum (v h ) supply voltage values for the intended appli- cation. when an energy source starts to inject energy into the inputs of an eh300/EH301 series module in the form of electrical charge impulses, these charge packets are collected, accumulated and stored onto an internal storage capacitor bank. for most com- mon energy harvesting applications, the electrical energy charge packets arrives in the form of input voltage spikes that are uncon- trolled and unpredictable. often these cover a wide range of volt- ages, currents and timing waveforms. eh300/EH301 series mod- ules are designed to accommodate such conditions with excep- tional efficiency and effectiveness . as an example, a eh300 mod- ule can cycle within 4 minutes at an average input current of 10 m a and within 40 minutes at an average input current of just 1.0 m a. benefits ? eliminates manual and elaborate system trimming procedures ? remote controlled automated trimming ? in-system programming capability ? no external components ? no internal clocking noise source applications ? sensor interface circuits ? transducer biasing circuits ? capacitive and charge integration circuits ? biochemical probe interface ? signal conditioning ? portable instruments e epad tm ? n a b l e d e eh300/301 epad ? energy harvesting tm modules eh300/eh300a/EH301/EH301a a dvanced l inear d evices, i nc. ordering information part number description eh300 4.6 mj module / 1.8v to 3.6v operation eh300a 30 mj module / 1.8v to 3.6v operation EH301 8.3 mj module / 3.1v to 5.2v operation EH301a 55 mj module / 3.1v to 5.2v operation ehj1c 6 inch cable / j1connector (input) ehj2c 6 inch cable / j2 connector (output) note: eh300a and EH301a are high energy output versions j1 j2 socket adapter cable: j1: hirose socket, 2 position p/n : df13-2s j2: hirose socket, 4 position p/n : df13-4s +input -input ground v r (ready) v p (output) +v mechanical specifications ? outline dimensions: w x l x h : 0.55 in. x 2.00 in. x 0.70 in. ? 4 mounting holes: 0.085 in. diameter ? weight: 0.5 ounce (14 grams) nominal
eh300/eh300a/EH301/EH301a rev 2.1 ?2012 advanced linear devices, inc. 2 of 4 v h v l t 1 t 3 t 2 t 4 + v eh300/EH301 waveforms v h v l v p t 1 t 3 t 2 t 4 output v h v l t 1 t 3 t 2 t 4 v r ready environmental specifications ? leadfree (rohs) compliant ? operating temperature range: 0 to 70 c ? max. average operating temperature : 50 c ? storage temperature: -40 to +85 c ? humidity: to 90% (no condensation) ? protection: conformal and epoxy coated functional description the eh300/EH301 series module's voltage on the onboard storage capacitor bank is +v, which is also the positive sup- ply voltage switched to power the output power load. ini- tially, +v voltage on an eh300/EH301 series module starts at 0.0v. during the initial charge period, +v starts charging from 0.0v. the module's internal circuit monitors and de- tects this +v voltage. when +v reaches v h , the module output (v p ) is enabled and turned to the on state and is then able to supply power to a power load, such as a micro- processor and/or a sensor circuit. the amount of useful en- ergy available is a function of the capacity of the storage capacitor bank. meanwhile, an eh300/EH301 series mod- ule continues to accumulate any energy generated by ex- ternal energy sources. if external energy input availability is high, output v p remains in an on state continuously, until such time that external energy availability is lower than the power demand required by the power load. as external en- ergy input exceeds power loading, +v increases until inter- nal voltage clamp circuits limit it to a maximum clamp volt- age. during normal operation, as power is drawn from an eh300/ EH301 series module, +v decreases in voltage. when +v reaches v l , output v p switches to an off state and stops supplying any further power to the power load. with built-in hysteresis circuits within the module, v p now remains in the off state, even when the external energy source starts charging the capacitor bank again by importing fresh new impulses of electrical energy. once v h level is reached again, output v p is then turned to the on state again. hence +v voltage cycles between v h to v l voltage levels and then to the off state. when in the on state, v p can supply up to 1a of current for a limited time period as determined by the stored useful energy and the energy demand by the power load. an optional input/ouput pin v r functions as v p on/off control (external input through 1k w ) or as ready logical control (output) signal preceeding output v p switching. input energy charging times t1 and t2 are limited by input energy available minus energy loss by an eh300/EH301 series module. the energy output time period t3 is deter- mined by the rate of energy used by the power load as a function of energy stored. low input energy hold time t4 is typically many orders of magnitude greater than the sum of t1, t2 and t3. initial setup & calibration eh300/EH301 series modules are setup and calibrated at the factory to standard specifications and settings. no user setup is required. optional user control signal and connection to external capacitor or battery storage banks are available at the output port. all eh300/EH301 series modules are shipped ready to use.
eh300/eh300a/EH301/EH301a rev 2.1 ?2012 advanced linear devices, inc. 3 of 4 t a = 25 o c, v in = 6.0v unless otherwise specified max. instantaneous input voltage +/- 500v max. instantaneous input current 400ma max. input/output power 500 mw operating temperature range 0 c to +70 c min. input 0.0v@1na internal voltage clamp 7.0v@10ma max. output current 1a caution: esd sensitive device. use static control procedures in esd controlled environment. absolute maximum and minimum ratings operating electrical characteristics t a = 25 o c, v in = 4.0v unless otherwise specified eh300 eh300a parameter symbol min typ max min typ max unit test conditions output low level v l 1.9 1.9 v output high level v h 3.5 3.5 v charging input v in 4.0/200 4.0/200 v@na power dissipation p d 0.4 0.8 1 2 m w useful energy output e 4.6 30 mj 1 cycle output on-time rating t * i 68/25 75/150 msec@ma 1 cycle v p output resistance r v p 0.15 0.15 w v p = 3.5v v r output sink current i rsink 2.5 2.5 ma v p = 3.5v, v r = 3.5v v r output source current i rsource -1.0 -1.0 ma v p = 3.5v, v r = 0.0v output load r load 3.5 3.5 w i out = 1a output current i out 11ar load = 3.5 w EH301 EH301a parameter symbol min typ max min typ max unit test conditions output low level v l 3.1 3.1 v output high level v h 5.2 5.2 v charging input v in 6.0/300 6.0/300 v@na power dissipation p d 0.9 1.8 1.5 3 m w useful energy output e 3.9 55 mj 1 cycle output on-time rating t * i 80/25 885/150 msec@ma 1 cycle v p output resistance r v p 0.1 0.1 w v p = 5.0v v r output sink current i rsink 5 5 ma v p = 5.0v, v r = 5.0v v r output source current i rsource -2 -2 ma v p = 5.0v, v r = 0.0v output load r load 55 w i out = 1a output current i out 11ar load = 5.0 w
eh300/eh300a/EH301/EH301a rev 2.1 ?2012 advanced linear devices, inc. 4 of 4 typical system applications eh4200* connection to eh300 * eh4200 series of micropower step up low voltage booster modules, e.g. eh4205, eh4295 typical cable connection eh300 test circuit 1 2 3 4 j1 j2 external capacitor 1 2 eh300/EH301 module + energy source 1 2 1 2 3 4 vp gnd j1 j2 +v gnd battery charger eh300/EH301 module energy source 1 2 1 2 3 4 vp gnd j1 j2 +v gnd application load module eh300/EH301 module energy source +v eh300/EH301 module - + in in 1 2 vp vr gnd j1 j2 100 voltage source 6.0v ac or +6.0v dc 1k dc voltmeter 1 2 3 4 dc voltmeter r in 3 1 g eh300/EH301 module 1 2 1 2 3 4 j1 j2 brown brown input cable: ehj1c output cable ehj2c red green yellow black eh300/EH301 module 1 2 1 2 3 4 j1 j2 eh4200 module dc voltmeter dc low voltage energy source + _ cable: ehj3c cable: ehj2c cable: ehj4c 1 2 3 4 j4 1 2 j1 powering application load module add external capacitor impulse power to micro controller with i/o handshake trickle charge a battery or drive a battery charger 1k w r load 1 2 3 4 j1 j2 v+ gnd energy source i/o micro controller 1 2 eh300/EH301 module
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