Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Noboru Nakashima

Yoshihide Kanakubo

Takuya Ishii

Tomoya Shigemi

Yoshitaka Ikeuchi

A current controller for generating a control signal which controls supply current flowing from a power source to a load includes an interface circuit which sets a threshold based on an instruction from an outside of the current controller, a threshold setting circuit which stores and outputs the threshold, a sensing circuit which determines a current or a temperature of a sensing element, and outputs a signal indicating that the supply current should be interrupted as the control signal if a determined current or a determined temperature exceeds the threshold, and a sensing control circuit which generates a clock signal including pulses with a predetermined period. The sensing circuit determines the current or the temperature of the sensing element during an active period of the clock signal.

Current controller and protection circuit

A protection device detects a temperature in a predetermined monitoring place in an electronic apparatusto protect the electronic apparatus, and includes an oscillating circuitfor generating a clock signal Vck having a predetermined cycle and a predetermined ON time, and a temperature detection circuitfor detecting the temperature in the monitoring place during the ON time of the clock signal Vck. The protection device shuts off supply of electric power to the electronic apparatus, when the temperature in the monitoring place exceeds a predetermined temperature.

Protection device, protection method using the same, method for processing signal using the same, and method for detecting quantity of electricity using the same

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Kanagawa, Japan

Noboru Nakashima