-
1.发明授权公开(公告)号：US11674987B1
公开(公告)日：2023-06-13
申请号：US16685574
申请日：2019-11-15
Applicant: RENESAS ELECTRONICS AMERICA INC.
Inventor： Zhihong Yu
CPC classification number: G01R22/066 , H02J9/061 , H02J9/068 , H02J2310/12
Abstract: One or more embodiments relate to a switch-mode power supply control circuit that can be used to provide power to regular single phase or three phase energy meter, while also offering a simple low cost method to detect a magnetic tampering event that usually occurs on energy meter. In one example, the switch-mode power supply for the energy meter is a flyback type switch mode power supply comprising a power switch, a switching controller, and a slew rate based magnetic field detection circuit which is configured to enable a magnetic tampering detection signal that can be communicated to the switching controller. Upon detection of a magnetic tampering event, the power supply and the supporting circuitry can raise the switching frequency of the power switch in order to provide more power to the output or cutoff power to the consumer's power outlet and even report the tampering event to the power station.
-
公开(公告)号：US11081876B2
公开(公告)日：2021-08-03
申请号：US16742703
申请日：2020-01-14
Applicant: Renesas Electronics America Inc.
Inventor： Zhihong Yu
Abstract: One or more embodiments relate to a control circuit for an input filter circuit in a switch mode power supply comprising a power switch and a switch controller to control the power switch to provide a regulated output voltage and current to a load. The control circuit, also referred to as a filter control circuit, can be used to detect a high voltage surge at its input and disconnect a capacitor in the input filter circuit from an input return, thereby protecting the input filter capacitor and the SMPS from damage. According to certain aspects, the control circuit can be integrated with the switch controller. Additionally, the control circuit can provide power to the switch controller at start-up.
-
公开(公告)号：US20200328590A1
公开(公告)日：2020-10-15
申请号：US16742703
申请日：2020-01-14
Applicant: Renesas Electronics America Inc.
Inventor： Zhihong Yu
Abstract: One or more embodiments relate to a control circuit for an input filter circuit in a switch mode power supply comprising a power switch and a switch controller to control the power switch to provide a regulated output voltage and current to a load. The control circuit, also referred to as a filter control circuit, can be used to detect a high voltage surge at its input and disconnect a capacitor in the input filter circuit from an input return, thereby protecting the input filter capacitor and the SMPS from damage. According to certain aspects, the control circuit can be integrated with the switch controller. Additionally, the control circuit can provide power to the switch controller at start-up.
-
-
Search Results
3
records
(took 0.011 seconds)
