ELMOS Semiconductor AG: System for auto start-stop function in vehicles
(firmenpresse) - ELMOS Semiconductor AG / Key word(s): Products/Innovation/
ELMOS Semiconductor AG: System for auto start-stop function in
vehicles
DGAP-Media / 03.05.2011 / 11:40
System for auto start-stop function in vehicles
Boost and buck converters for efficient energy control and CO2 reduction
ELMOS introduces a set of chips for the implementation of an automatic
start-stop function in vehicles. With ELMOS chips E981.01 and E910.28, the
voltage supply of the automotive on-board system can be maintained when car
and engine stop in front of a red light or while passengers are getting in
or out. This not only saves fuel but also improves the CO2 balance of the
vehicles.
The multiphase boost converter (E981.01) and the synchronous buck converter
(E910.28) reach a very high efficiency level together. The operation of the
boost converter is started as soon as the engine is running and the
generator is supplying power. Due to the possible high output current of
the multiphase boost converter, energy storage is charged within just a few
seconds and provides an intermediate circuit voltage of 24-48V. While the
car is being driven, the buck converters are bypassed and thus out of
operation. When the engine stops and the on-board voltage drops to the
level of the battery voltage, the bypass is removed and the functional
units receive their supply voltage from the buck converters that receive
their input voltage out of the energy storage.
The boost converter (E981.01) works with up to 9 phases and is able,
together with suitable external components (storage choke, N-channel
MOSFET's, diodes), to supply several hundred watts at an efficiency rate of
96% without difficulty. By applying the multiphase principle, a very high
switching frequency of up to 4.5 MHz is achieved. In addition, the
overlapping of the single phases leads to an improvement of electromagnetic
compatibility (EMC). Moreover, system costs can be reduced further by the
use of simple external components for additional filtering.
Due to synchronous rectification and the applied PFM control principle, the
buck converters (E910.28) are able to compensate very fast load
fluctuations at a high overall efficiency rate of up to 95% with high
accuracy. The controller components supply extensive diagnostic information
and are able to communicate with a microcontroller for the control of
energy distribution.
Samples and demo boards are available for both automotive-qualified
components.
For more information, application descriptions, samples, and evaluation
boards, please send an e-mail with the subject 'start-stop' to
sales(at)elmos.de, visit our website www.elmos.de, 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(at)elmos.de, www.elmos.de
End of Media Release
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Language: English
Company: ELMOS Semiconductor AG
Heinrich-Hertz-Str. 1
44227 Dortmund
Deutschland
Phone: +49 (0)231 7549-575
Fax: +49 (0)231 7549-548
E-mail: invest(at)elmos.de
Internet: http://www.elmos.de
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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122698 03.05.2011
Datum: 03.05.2011 - 11:40 Uhr
Sprache: Deutsch
News-ID 33946
Anzahl Zeichen: 0
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Kategorie:
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