公开(公告)号：US20030133313A1

公开(公告)日：2003-07-17

申请号：US10331155

申请日：2002-12-27

Applicant: STMicroelectronics S.r.I.

Inventor： Marcello Criscione

IPC: H02M003/335

CPC classification number: H02M3/1588 ,  Y02B70/1466

Abstract: A synchronous rectifier circuit operates as a high-efficiency DC/DC converter for mixed step-up/step-down applications, and includes an input terminal receiving a voltage signal, a second input terminal node connected to an external inductor, and an output terminal. A power switch may be connected between the second input terminal node and the output terminal to generate on its output a voltage at one terminal of the inductor. A driver circuit is provided for driving the power switch, and a comparator senses the potential difference between the output and input terminals and produces an enable signal for the driver circuit. The comparator may be a wide pass-band comparator forcing prompt triggering of the regulation loop in the rectifier.

Abstract translation: 同步整流电路用作用于混合升压/降压应用的高效率DC / DC转换器，并且包括接收电压信号的输入端子，连接到外部电感器的第二输入端子节点和输出端子 。 电源开关可以连接在第二输入端子节点和输出端子之间，以在其输出端产生电感器一端的电压。 提供驱动电路用于驱动电源开关，比较器检测输出端和输入端之间的电位差，产生驱动电路的使能信号。 比较器可以是宽的通带比较器，迫使整流器中调节回路的触发迅速。