新型降压稳压器提供更高的效率,处理更多的权力
我们知道一个降压升压DC / DC转换器是一个可靠的组成部分,将提供不同的输入电压条件下,在许多工业和汽车环境,包括电池供电产品为主导的调节输出电压。这么多年来,供应商Intersil,线性技术,德克萨斯仪器和Vicor,其中,不断提高这些设备的性能,扩大其产品portfolios1,2。
现在,这些供应商已经发布了新一代降压升压DC / DC转换器具有许多独特的功能和功能,以迎接新的挑战,克服障碍,限制了他们的使用。此外,损失已被最小化,以实现非常高的效率,具有更宽的输入和输出电压范围和高输出电流。高频操作也使最佳的类功率密度和瞬态响应。因此,这些转换器被设计成一个广泛的高性能应用,包括计算,通信,工业,LED照明和电池系统。
Variable regulated outputs
Vicor, for example, has expanded its buck-boost family with the addition of a new flexible buck-boost converter, PI3749, with a wide input voltage range. Its variable regulated output can be varied over a wide range with a very-high conversion efficiency of 98 percent. A member of the Picor Cool-Power ZVS family, it incorporates the company’s zero-voltage switching (ZVS) topology to minimize switching losses and maintain high efficiency over the specified input-voltage range of 16 V to 34 V. The converter’s regulated output voltage can vary from 12 V to 34 V while output current can go as high 11.5 A for power delivery of over 200 W.
The high-density buck-boost converter comes in a 10.0 x 14.0 x 2.56 mm LGA system-in-package (SiP) that integrates a controller, four power switches, and associated support components as shown in Figure 1. Consequently, the PI3749-00 requires only an external inductor, resistive feedback divider, and minimal capacitors to form a complete DC/DC switching-mode buck-boost regulator.
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