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反激式稳压器作为隔离电源的首选
反激变换器很少是工程师寻找合适的开关DC/DC转换器(“调节器”)的第一个想法,因为它们在设计上可能很麻烦。但是,如果应用程序要求高电压(相对较低的功率),则反激式进入自己的状态。
由于它是用来产生高电压的,所以反激式调节器采用了变压器以确保安全隔离,取代了传统开关升压/降压(“降压”/“升压”)调节器中的(非隔离)电感。然而,变压器的使用确实使这种调节器不适合大功率应用。
本文将仔细研究反激式稳压器,探讨其优点和缺点,并描述这种类型的稳压器最适合的应用类型。
The need for isolaTIon
A switching buck/boost voltage regulator is something of a workhorse for the power conversion engineer. Reliable, efficient, relaTIvely easy-to-design in (although not as simple as a linear regulator —see the TechZone arTIcle “Understanding the Advantages and Disadvantages of Linear Regulators”), and in plenTIful supply, buck/boost regulators such as Fairchild Semiconductor‘s KA34063A — a monolithic 100 Hz to 100 kHz switching power supply — often top the designer’s shortlist for his/her next project.