Unity power factor rectifiers find applications in modern utility systems and consumer electronic devices. However, a dedicated rectifier is required for a given load. In this study, a Unity Power Factor (UFP) power block is described which can generate two DC outputs, one buck and one boost, with a reduced number of switches and associated driver circuits. The topology adapts well with conventional control as it retains the dynamic behaviour of a buck and boost topology. While supplying simultaneous loads it exhibits minimal cross-regulation interference between the outputs. The controller implementation for the proposed power block is described and its difference with the conventional Power Factor Correction (PFC) controller is outlined. The topology along with its control to regulate the outputs and force UPF operation are validated using a 200 W prototype with 110 V utility input and 180–24 V DC outputs.

中文翻译：

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双输出单位功率因数整流器电源块

Unity功率因数整流器可在现代公用事业系统和消费电子设备中找到应用。但是，对于给定的负载，需要专用的整流器。在这项研究中，描述了一种单位功率因数（UFP）电源块，该电源块可以产生两个DC输出，一个降压和一个升压，并减少开关和相关的驱动器电路的数量。该拓扑结构很好地适应了常规控制，因为它保留了降压和升压拓扑结构的动态行为。同时提供负载时，输出之间的交叉调节干扰最小。描述了针对所提出的功率块的控制器实现，并概述了其与常规功率因数校正（PFC）控制器的区别。