公开(公告)号：US20180123446A1

公开(公告)日：2018-05-03

申请号：US15789975

申请日：2017-10-21

申请人： Microsemi Corporation

发明人： Bruce FERGUSON

IPC分类号： H02M1/32 ,  H02M3/156 ,  H02H9/02 ,  H02M1/08

CPC分类号： H02M1/32 ,  G05F1/5735 ,  H02M1/08 ,  H02M3/156 ,  H02M2001/0025

摘要： A dual level current limit apparatus constituted of: an electronically controlled switch coupled between a load and a line voltage; and a control circuitry arranged to alternately: control said electronically controlled switch to limit the magnitude of current flowing therethrough responsive to the difference between a predetermined first function of the current magnitude and a predetermined reference voltage, and control said electronically controlled switch to limit the magnitude of current flowing therethrough responsive to the difference between said first function of the current magnitude and a predetermined second function of the load voltage.

公开(公告)号：US20150276812A1

公开(公告)日：2015-10-01

申请号：US14666326

申请日：2015-03-24

申请人： MICROSEMI CORPORATION

发明人： Bruce FERGUSON

IPC分类号： G01R1/30 ,  G01R19/00

CPC分类号： G01R1/30 ,  G01R19/0023 ,  G01R19/0092 ,  H03F3/217 ,  H03F3/343 ,  H03F3/68

摘要： A current sensing system constituted of: an impedance element; a switching network arranged to alternately couple a first end of the impedance element between a supply voltage and return, the impedance element arranged to develop a voltage there across reflecting a current flow to a load coupled to the second end of the impedance element; a first stage amplifier, a first and second input thereof respectively coupled to the first and second end of the impedance element, a power supply input thereof coupled to a voltage greater than the supply voltage and a return thereof coupled to the first end of the impedance element, the amplifier having a first and second output, the potential difference reflecting the impedance element voltage times a first stage gain; and a second stage amplifier, a first and second input thereof respectively coupled to a first and second output of the first stage amplifier.

摘要翻译： 一种电流感测系统，包括：阻抗元件; 交换网络，布置成在电源电压和返回之间交替地耦合阻抗元件的第一端，所述阻抗元件布置成在其上产生电压，以反映电流到耦合到阻抗元件的第二端的负载; 第一级放大器，其第一和第二输入分别耦合到阻抗元件的第一和第二端，其电源输入耦合到大于电源电压的电压，以及耦合到阻抗的第一端的返回 所述放大器具有第一和第二输出，反映所述阻抗元件电压的电位差乘以第一级增益; 以及第二级放大器，其第一和第二输入分别耦合到第一级放大器的第一和第二输出。