公开(公告)号：US20010033504A1

公开(公告)日：2001-10-25

申请号：US09814176

申请日：2001-03-21

Applicant: STMicroelectronics S.r.I.

Inventor： Ezio Galbiati ,  Maurizio Nessi ,  Marco Palestra

IPC: H02M003/24

CPC classification number: H02M7/53873

Abstract: A feedback control circuit is for the current in a load formed by a winding in series with a current sensing resistor, coupled to a full-bridge output stage, an amplifier coupled to the terminals of the sensing resistor, and a controller fed with the output of the amplifier and with a voltage reference and producing a correction signal. The circuit has a PWM converter for generating a pair of control signals. The PWM converter includes an up/down counter producing a count value and logic circuitry that produces the twos-complement of the correction signal. A pair of registers are coupled to the outputs of the controller and of the logic circuitry. A first comparator coupled to the outputs of the counter and of the first register produces the first control signal, if the count signal exceeds the value stored in the first register. A second comparator coupled to the counter and to the second register produces the second control signal, if the count signal overcomes the value stored in the second register.

Abstract translation: 反馈控制电路用于由负载形成的负载中的电流，该绕组与耦合到全桥输出级的电流感测电阻串联，耦合到感测电阻的端子的放大器和馈送有输出的控制器 并具有电压基准并产生校正信号。 该电路具有用于产生一对控制信号的PWM转换器。 PWM转换器包括产生计数值的上/下计数器和产生校正信号的二进制补码的逻辑电路。 一对寄存器耦合到控制器和逻辑电路的输出端。 如果计数信号超过存储在第一寄存器中的值，则耦合到计数器和第一寄存器的输出的第一比较器产生第一控制信号。 如果计数信号克服存储在第二寄存器中的值，则耦合到计数器和第二寄存器的第二比较器产生第二控制信号。