TM
A
L
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DVANCED
INEAR
EVICES, INC.
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e
EPAD
EH4295
MICROPOWER STEP UP LOW VOLTAGE BOOSTER MODULE
GENERAL DESCRIPTION
FEATURES
The EH4295 Micropower Step Up Low Voltage Booster Module,
part of the EH4200 Series of Micropower Step Up Low Voltage
Boosters, is a self-powered voltage-booster module that converts
alowDCvoltageinputtoahigherACorDCvoltageoutputsuitable
for many low-power energy harvesting applications using photo-
diodes, thermoelectric or electromagnetic generators as the input
source. The EH4295 does not need a separate power supply to
operate and it derives its power directly from the low input voltage
source. TheEH4200Seriesdrawsinputpowerlevelsstartingatas
low as 2µW, which enables an on-board self-starting oscillator.
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Nominal input impedance of 950Ω@VIN=0.25V
Small footprint and volume less than 1 cu. in.
Simple and easy to use - just connect a 2-wire input source
and 2-wire output load
Ready-to-Use out of the box, no circuit design required
Direct interface to ALD's EH300/EH301 series of Energy
Harvesting Modules
A range of models suitable for a variety of energy gener
ating sources
Self-starting at both very low operating voltage and low
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operating current levels
The EH4295 features nominal input impedance of 950Ω, making
it suitable for many different energy generating sources. The
EH4200 Series is part of a growing family of Micro-power Low
Voltage Booster Modules, Energy Harvesting Modules and En-
ergy Harvesting Integrated Circuits.
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Self-contained booster with all components on-board
Built-in on-board miniature transformer for high-efficiency
energy conversion
Unique custom on-board EPAD MOSFET arrays
Optional user-installed full wave rectifier on board to
produce DC voltages
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The EH4295 is designed primarily for driving loads such as the
ALD EH300/EH301 Series Energy Harvesting Modules. The AC
outputsoftheEH4295areconnecteddirectlytotheinputterminals
of the EH300/EH301 Series Energy Harvesting Modules with a
two-wire cable. They can also be used for trickle-charge applica-
tions such as battery charger or super-cap charger, including
situations where the energy input is not well controlled or regu-
lated. For certain applications, the EH4295 can also be used
without the EH300/EH301 Series Energy Harvesting Modules.
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Compatible with a wide range of voltage sources and a
wide range of source impedances
Adaptable for use with a broad range of applications
No calibration or setup required
Maintenance free operation
Long operating life
Virtually unlimited operating cycles
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Moisture and dust protection
RoHS compliant
The EH4295 self-starting oscillator oscillates at a natural fre-
quencyofabout400Hz, whichdependsonthesource impedance,
the source voltage, the loading at the output and the resonating
components on board the EH4295. The oscillator waveform is
coupled to a transformer inside the module that provides an AC
output signal that is limited in amplitude by the output loading. A
typical output loading is a full wave rectifier that can handle AC
inputs over 20V and input power as limited by the output of the
EH4295.
APPLICATIONS
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Charge EH300/EH301/EH300A/EH301A series
EH Modules from low voltage sources
Energy Harvesting from low-voltage micro-power
energy-generating sources
Direct or Indirect remote-node power supplies for
Wireless Sensor Networks
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Low duty-cycle metering, control and sensing networks
Energy capture from Intermittent energy sources
Trickle-charger for Standby backup power such as
battery-packs or super-capacitor networks
Backup power for switching between different power
sources
For many energy-harvesting applications, the EH4295, combined
with EH300 Series Energy Harvesting Modules, offers a simple
and efficient solution when used with a low-voltage low-energy
generatingsourcethatonlydeliverssporadicintermittentamounts
ofinputpower.ThecombinedEH4295andEH300SeriesModules
can ramp from zero output power to useable levels for operating
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Industrial and Business systems with always-charged
temporary backup power supplies
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Micro-power Self-boosting oscillator
Low DC Voltage Booster to supply operating voltage
for another Step-up DC-DC converter
Extreme life-span power sources
EH energy capture, storage, and power management
from mechanical, thermal, chemical, solar, biological,
and human body sources
ORDERING INFORMATION
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Part Number
Description
EH4295
Micropower Step Up Low Voltage Booster
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EH based battery substitution and/or remote battery
charging systems
Module, 950Ω Input
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Hybrid or alternative power source conditioning
Condition-based monitoring systems
Self-powered remote control switching systems
Hybrid power (dual power) systems with extended
operating lives
EHJ3C
EHJ4C
6 in. Input Cable for EH4200 Series Modules
6 in. Output Cable for EH4200 Series Modules
with connector to the EH300/EH301
EHJ5C
6 in. Output Cable for EH4200 Series Modules
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System power reliability enhancement
Intermittent duty cycle remote site applications
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
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