STMicroelectronics Innovation Cuts the Cost of Meeting
- Patented energy-recovery circuit enables ultra-high efficiency using competitively priced silicon diodes
Legislation governing energy efficiency and power quality already requires many types of mains-powered equipment to be fitted with Power Factor Correction (PFC) circuitry to minimize energy loss and distortion. These PFC circuits typically combine a power MOSFET, a rectifier diode, an inductor, and a capacitor. Historically, engineers required expensive technology, such as silicon carbide (SiC) for the rectifier diode, to meet high efficiency certification levels such as 80 Plus Bronze, Silver or Gold.
ST’s new design, called BC2 (Back-Current Circuit), now allows competitively priced silicon diodes to be used in preference to SiC devices in boost or buck converters inside solar inverters or SMPS applications such as desktop PCs, servers, telecom base stations. Where the low recovery current of an SiC boost diode helps to minimize the MOSFET switching-on losses, BC2 fully removes these losses and recycles the energy linked to the recovery of the boost diode. Compared to a standard circuit, the new topology requires one additional inductor and three optimized diodes. This approach increases the efficiency by as much as 2% at approximately half the price of a solution using SiC devices.
To enable designers to implement BC2 in new power supply designs, ST has announced a family of six silicon-based rectifiers and free-wheel diodes optimized for this application:
·STTH8BC060D/STTH8BC065DI, STTH10BC065CT and STTH16BC065CT - 600V and 650V rectifier diodes, offering current ratings of 8A, 10A and 16A, respectively;
·STTH3BCF060U and STTH5BCF060 - 600V free-wheel diodes offering current ratings of 3A and 5A, respectively.
Used in kits, these diodes permit the design of competitive high-efficiency circuits up to 2kW. ST provides full design support for the new topology, to help designers achieve the best performance and efficiency. Prices begin at $1.70 for an 8A kit in quantities of 1000 units. Alternative pricing options are available for larger quantities.
ST마이크로일렉트로닉스 개요
ST마이크로일렉트로닉스는 혁신적인 반도체 솔루션을 다양한 전자 애플리케이션 분야의 고객들에게 제공하고 있는 세계적인 선도업체이다. ST는 자사의 방대한 기술, 설계 전문기술 및 IP 포트폴리오 통합, 전략적 협력업체와 강력한 제조시설 등을 활용하여 멀티미디어 컨버전스 및 전력 애플리케이션 분야에서 명실상부한 선도업체가 되는 것을 목표로 하고 있다. ST의 2010년도 매출은 103억 5,000만 달러이다. ST에 대한 보다 상세한 정보는 www.st.com를 참조하라.
웹사이트: http://www.st.com
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2012년 1월 26일 13:19