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公开(公告)号：US20250038669A1
公开(公告)日：2025-01-30
申请号：US18777716
申请日：2024-07-19
Applicant: ROHM CO., LTD.
Inventor： Yukihiro WATANABE
IPC: H02M3/158
Abstract: The present disclosure provides a semiconductor device, including: a synchronous input terminal; a synchronous output terminal; a functional circuit, having a reference clock signal generating circuit operable to generate a reference clock signal; a signal output circuit, connected to the synchronous output terminal; and a mode setting circuit, for setting an operation mode of the functional circuit and the signal output circuit to a first mode or a second mode through a mode determination process. The functional circuit is operable to perform a predetermined functional operation in synchronization with the reference clock signal in the first mode, and perform the functional operation in synchronization with an input clock signal transmitted to the synchronous input terminal from another semiconductor device in the second mode. The signal output circuit is operable to output a clock signal based on the reference clock signal from the synchronous output terminal in the first mode.
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公开(公告)号：US20180278045A1
公开(公告)日：2018-09-27
申请号：US15933826
申请日：2018-03-23
Applicant: Rohm Co., Ltd.
Inventor： Yukihiro WATANABE
CPC classification number: H02H7/1213 , G01R19/16538 , G01R31/025 , H02H1/0007 , H02M1/08 , H02M1/32 , H02M1/36 , H02M3/157 , H02M3/1588 , Y02B70/1466
Abstract: A switching power supply detects a short circuit to ground, for example, by comparing a soft-start voltage Vss with a feedback voltage Vfb while securing an offset voltage ΔV. The switching power supply includes, for example, a short-circuit-to-ground detection circuit which detects a short circuit to ground at a monitoring target terminal. When a short circuit to ground occurs for the first time, the output of the short-circuit-to-ground detection circuit is masked for a first period. When a short circuit to ground occurs for the second or any succeeding time, the output of the short-circuit-to-ground detection circuit is masked for a second period shorter than the first period.
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公开(公告)号：US20250030346A1
公开(公告)日：2025-01-23
申请号：US18750055
申请日：2024-06-21
Applicant: ROHM CO., LTD.
Inventor： Yukihiro WATANABE
IPC: H02M3/158
Abstract: A power supply controller provided in a switching power supply which generates output voltage from input voltage and configured to control operation of the switching power supply includes: an output stage including an output element between an application terminal for the input voltage and a switch terminal, and a rectifier element between the switch terminal and a reference potential terminal; a control circuit to generate control signal according to the output voltage; and an output element drive circuit to turn on or off the output element according to the control signal by drive voltage for turning on the output element, wherein when switching the output element from an off state to an on state, the output element drive circuit switches the output element from the off state to the on state by the drive voltage having first voltage and increases the drive voltage to second voltage.
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公开(公告)号：US20210382510A1
公开(公告)日：2021-12-09
申请号：US17283389
申请日：2019-10-21
Applicant: ROHM CO., LTD.
Inventor： Isao Takobe , Yuhei Yamaguchi , Yukihiro WATANABE , Shingo Hashiguchi
Abstract: A linear power supply circuit according to the present invention is provided with: an output transistor provided between an input end to which an input voltage is applied and an output end to which an output voltage is applied; a driver for driving the output transistor; and a feedback unit for feeding, back to the driver, information about an output electrical current that is output from the output end. The driver drives the output transistor on the basis of the difference between a voltage based on the output voltage and a reference voltage, as well as the information.
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