公开(公告)号：US20150285843A1

公开(公告)日：2015-10-08

申请号：US14707528

申请日：2015-05-08

Applicant: ST-Ericsson SA

Inventor： Vratislav MICHAL

IPC: G01R19/165 ,  G01R19/00

CPC classification number: G01R19/16552 ,  G01R19/0084 ,  G01R19/0092 ,  H02M3/156 ,  H02M3/1588 ,  H02M2001/0009 ,  H02S50/10 ,  Y02B70/1466

Abstract: It is proposed a system for measuring an output current ÎOUT of a DC-to-DC converter, the DC-to-DC converter comprising a transistor power stage. The system comprises: a voltage measuring circuit, connected to the output of the power stage of the DC-to-DC converter, for measuring an average voltage drop VAVG′ on impedances RDS(P,N) of the transistors of the power stage; an impedance RComposite, connected to an output of the voltage measuring circuit providing a current IOUT′, the impedance RComposite reproducing the impedances RDS(P,N) of the transistors of the power stage and being traversed by the current IOUT′ such that ÎOUT=VAVG/(G·k·RComposite)=IOUT′/(G·k) wherein G·k is a scaling ratio.

Abstract translation: 提出了一种用于测量DC-DC转换器的输出电流ÎOUT的系统，DC-DC转换器包括晶体管功率级。 该系统包括：电压测量电路，连接到DC-DC转换器的功率级的输出，用于测量功率级的晶体管的阻抗RDS（P，N）上的平均电压降VAVG'; 阻抗RC复合器，连接到提供电流IOUT'的电压测量电路的输出，阻抗RC复合器再现功率级的晶体管的阻抗RDS（P，N）并且由电流IOUT'穿过，使得θOUT= VAVG /（G·k·RC复合）= IOUT'/（G·k）其中G·k是缩放比。