Press Release | 3 May 2011 11:40
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ELMOS Semiconductor AG / Key word(s): Products/Innovation/
Boost and buck converters for efficient energy control and CO 2 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 CO 2 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@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@elmos.de, www.elmos.de End of Media Release 03.05.2011 Dissemination of a Press Release, transmitted by DGAP – a company of EquityStory AG. The issuer is solely responsible for the content of this announcement. DGAP’s Distribution Services include Regulatory Announcements, Financial/Corporate News and Press Releases. Media archive at www.dgap-medientreff.de and www.dgap.de |
| 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@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 |