公开(公告)号：US20150359052A1

公开(公告)日：2015-12-10

申请号：US14713982

申请日：2015-05-15

Applicant: NXP B.V.

Inventor： Leendert van den Broeke ,  Ewold van Geffen ,  Frank Schoofs

IPC: H05B33/08 ,  H02M3/335 ,  H02M3/156

CPC classification number: H05B33/0815 ,  H02M3/156 ,  H02M3/33507 ,  H05B33/0845 ,  Y02B20/346

Abstract: A switched mode power supply comprising: a rectified voltage terminal and a rectified ground terminal for receiving a phase-cut rectified voltage; a power switch and an inductive element connected in series between the rectified voltage terminal and the rectified ground terminal; a switch controller having a floating ground terminal and a dimming input terminal, wherein the dimming input terminal is for receiving a dimming voltage signal indicative of a required dimming level, wherein the switch controller is configured to control the switch in accordance with the dimming voltage signal and wherein the inductive element is connected between the rectified ground terminal and the floating ground terminal; and a dimming level controller configured to set the dimming voltage signal in accordance with the rectified phase-cut voltage with respect to the floating ground terminal.

Abstract translation: 一种开关电源，包括：整流电压端子和整流接地端子，用于接收相切整流电压; 串联在整流电压端子和整流接地端子之间的电源开关和电感元件; 具有浮动接地端子和调光输入端子的开关控制器，其中所述调光输入端子用于接收指示所需调光电平的调光电压信号，其中所述开关控制器被配置为根据所述调光电压信号 并且其中所述电感元件连接在所述整流的接地端子和所述浮置接地端子之间; 以及调光电平控制器，被配置为根据相对于浮动接地端子的整流相切电压来设置调光电压信号。