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EH4295
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MICROPOWER STEP UP LOW VOLTAGE BOOSTER MODULE
GENERAL DESCRIPTION
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
a low DC voltage input to a higher AC or DC voltage output suitable
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. The EH4200 Series draws input power levels starting at as
low as 2µW, which enables an on-board self-starting oscillator.
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.
The EH4295 is designed primarily for driving loads such as the
ALD EH300/EH301 Series Energy Harvesting Modules. The AC
outputs of the EH4295 are connected directly to the input terminals
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.
The EH4295 self-starting oscillator oscillates at a natural fre-
quency of about 400Hz, which depends on the source 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.
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
generating source that only delivers sporadic intermittent amounts
of input power. The combined EH4295 and EH300 Series Modules
can ramp from zero output power to useable levels for operating
FEATURES
• Nominal input impedance of 950Ω@V
IN
=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
operating current levels
• 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
• 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
• Moisture and dust protection
• RoHS compliant
APPLICATIONS
• 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
• 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
• Industrial and Business systems with always-charged
temporary backup power supplies
• 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
• EH based battery substitution and/or remote battery
charging systems
• 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
• System power reliability enhancement
• Intermittent duty cycle remote site applications
ORDERING INFORMATION
Part Number
EH4295
EHJ3C
EHJ4C
EHJ5C
Description
Micropower Step Up Low Voltage Booster
Module, 950Ω Input
6 in. Input Cable for EH4200 Series Modules
6 in. Output Cable for EH4200 Series Modules
with connector to the EH300/EH301
6 in. Output Cable for EH4200 Series Modules
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
ALD [ ADVANCED LINEAR DEVICES ]
