Elmos Semiconductor SE

Regulatory Filings • Jun 19, 2012

News Details

Media | 19 June 2012 14:00

ELMOS Semiconductor AG: Contactless high-precision current sensing

ELMOS Semiconductor AG / Key word(s): Products/Innovation/

19.06.2012 / 14:00

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Sensor system E524.50 for up to 500 kHz AC

With the E524.50, ELMOS presents a sensor system for precise current
measurement. The system features a compact size, galvanic isolation from
the primary current, high dynamics, and it integrates an overcurrent alarm
output configurable by the customer. Assembly tolerances can be compensated
at application level by calibrating zero point and sensitivity, reaching
high system precision. The sensor system includes the sensor cell, signal
processing, and two permanent magnets for generating a magnetic field in
support of the sensor element.

Potential applications are electric vehicles and battery management as well
as power inverters for solar and wind power stations.

The E524.50 is based on the anisotropic magneto-resistive effect (AMR). The
system measures the magnetic field generated by the primary conductor, with
the sensitive axis being located at the level of the sensor element. The
scale of the AMR effect makes a flux concentrator redundant. The fast
amplifiers used in the feedback controlled circuit (closed-loop principle)
allow for the wide measurement bandwidth from DC to beyond 500 kHz AC,
making the fast detection of the actual quantities of pulse edges possible
in particular. Typical total error is 1.5% FS (full scale, max. output
signal) over the entire temperature range from -40 C to +125 C, thus below
the typical tolerance of about 5% FS shown by current sensors based on the
Hall effect.

A special leadframe together with advanced packaging technology enable a
'system-in-package' solution (SIP): All system components for sensing the
primary current are integrated into a JEDEC compatible SOIC16 package in a
standard molding process. Additional mounting (through-hole technology) or
soldering processes (e.g. wave soldering) for manufacturing the printed
circuit board are unnecessary.

The magnetic field differential is created by leading the primary conductor
in a U shape below the sensor package. The sensor is situated on the U's
axis of symmetry. By varying the geometry of the primary conductor, the
differential magnetic field desired at the sensor location can be adjusted
and optimized for different current ranges and applications. Thus only one
current sensor is required, covering a wide range of different primary
currents.

For more information, datasheets, application descriptions and samples,
please send an e-mail with the subject 'E524.50' to sales@elmos.com, visit
our website www.elmos.com on the Internet, or call us at: + 49 231 7549
100.

ELMOS Semiconductor AG is a developer and manufacturer of system solutions
on semiconductor basis. For more than 25 years, our chips have made
automobiles as well as industrial and consumer goods more performance and
power efficient.

Contact: ELMOS Semiconductor AG, Mathias Kukla, Heinrich-Hertz-Str. 1,
44227 Dortmund, Phone: +49 231-7549-0, Extension: -199, Fax: +49
231-7549-548, info@elmos.com, www.elmos.com

End of Media Release

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Language: English
Company: ELMOS Semiconductor AG
Heinrich-Hertz-Str. 1
44227 Dortmund
Germany
Phone: +49 (0)231 7549-575
Fax: +49 (0)231 7549-548
E-mail: invest@elmos.com
Internet: http://www.elmos.com
ISIN: DE0005677108
WKN: 567710
Listed: Regulierter Markt in Frankfurt (Prime Standard);
Freiverkehr in Berlin, Düsseldorf, Hamburg, München,
Stuttgart

End of News DGAP-Media

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