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

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 2

µW, which enables an on-board self-starting oscillator.

The EH4295 features nominal input impedance of 950

Ω, 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 950

• 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

• 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

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MICROPOWER STEP UP LOW VOLTAGE BOOSTER MODULE

EH4295

Part Number

Description

EH4295

Micropower Step Up Low Voltage Booster

Module, 950

Ω Input

EHJ3C

6 in. Input Cable for EH4200 Series Modules

EHJ4C

6 in. Output Cable for EH4200 Series Modules

with connector to the EH300/EH301

EHJ5C

6 in. Output Cable for EH4200 Series Modules

ORDERING INFORMATION