公开(公告)号：US20240413755A1

公开(公告)日：2024-12-12

申请号：US18813423

申请日：2024-08-23

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yoshihiro FUJIWARA ,  Tatsuya HOSOTANI

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/32 ,  H02M3/157

Abstract: A signal extension circuit is electrically connected between an MPU and a drive circuit and outputs a second drive signal generated by adjusting a phase of a first drive signal. A low-voltage malfunction prevention circuit is connected between the input end of the drive circuit and the output ends of the MPU and the signal extension circuit. The first drive signal is a three-state signal having one of first, second and third voltages in ascending order. The low-voltage malfunction prevention circuit includes a detection comparison circuit that detects an output voltage and determines whether the output voltage is less than or equal to a threshold value representing a voltage value that is less than a predetermined output voltage. When the output voltage is less than the threshold value, the low-voltage malfunction prevention circuit outputs the first drive signal as the second drive signal to the drive circuit.

公开(公告)号：US20240195282A1

公开(公告)日：2024-06-13

申请号：US18583563

申请日：2024-02-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Tatsuya HOSOTANI ,  Yoshihiro FUJIWARA

IPC: H02M1/00 ,  H02M1/088 ,  H02M3/155

CPC classification number: H02M1/0048 ,  H02M3/155 ,  H02M1/088

Abstract: A power supply system includes an MPU, multiple power conversion circuits, and multiple extended-control circuits. The MPU supplies a digital switching driving signal to the power conversion circuit, and supplies a digital switching driving signal to the power conversion circuit. The extended-control circuit, which includes a CR circuit, generates a switching driving signal which is delayed with respect to the digital switching driving signal, and supplies the switching driving signal to the power conversion circuit. The extended-control circuit, which includes a CR circuit, generates a switching driving signal which is delayed with respect to the digital switching driving signal, and supplies the switching driving signal to the power conversion circuit.