公开(公告)号：US20040032756A1

公开(公告)日：2004-02-19

申请号：US10387119

申请日：2003-03-12

Applicant: STMicroelectronics N.V.

Inventor： Luc Jozef Louis Van Den Bossche

IPC: H02M007/00

CPC classification number: H02M7/219 ,  H02M7/217

Abstract: AC/DC converters comprise rectifiers for rectifying AC signals into DC signals. By providing these AC/DC converters with voltage dividing capacitors located between converter-input, a resistor, added to voltage dividing capacitor for filtering peak signals, and a rectifier, the rectifier can be better integrated, as it no longer receives the entire input voltage present at the converter-input of the AC/DC converter, without a conventional transformer comprising an iron core and windings being required. Such an AC/DC-converter is small sized, of light-weight and low costly made. Preferably, the converter-input is symmetric, the rectifier comprises two diodes and two transistors and a zero-cross detector for switching the transistors, the AC/DC converter comprises a down-converter located between the rectifier and converter-output for further down-converting purposes and comprising an inductor and a regulator for regulating inductor/capacitor-energies, with buffer capacitors being present in parallel to the down-converter for stabilising purposes, to get a transformerless wall plug adapter.

Abstract translation: AC / DC转换器包括用于将AC信号整流为DC信号的整流器。 通过为这些AC / DC转换器提供位于转换器输入端之间的分压电容器，添加到用于滤波峰值信号的分压电容器的电阻器和整流器，整流器可以更好地集成，因为它不再接收整个输入电压 存在于AC / DC转换器的转换器输入端，而不需要包括铁芯的常规变压器和绕组。 这种AC / DC转换器体积小巧，重量轻，成本低廉。 优选地，转换器输入是对称的，整流器包括两个二极管和两个晶体管和用于切换晶体管的零交叉检测器，AC / DC转换器包括位于整流器和转换器输出之间的下变频器， 转换目的，并且包括用于调节电感器/电容器能量的电感器和调节器，其中缓冲电容器与下变频器​​并联存在用于稳定目的，以获得无变压器壁插头适配器。