Abstract:
A magnetic sensor integrated circuit includes an electronic circuit arranged on a semiconductor substrate, and input ports and first and second output ports extending out from a housing. The electronic circuit includes a magnetic field detection circuit and an output control circuit. The magnetic field detection circuit is configured to detect an external magnetic field and generate magnetic field detection information. The first output port outputs the magnetic field detection information to an outside of the housing. The output control circuit is configured to control, based at least on the magnetic field detection information, the integrated circuit to operate in at least one of a first state in which a current flows from the second output port to an outside of the integrated circuit and a second state in which a current flows from the outside of the integrated circuit to the second output port.
Abstract:
An application device, a motor component and a motor driver circuit are provided according to the invention. The motor driver circuit includes: a controllable bi-direction alternating current switch connected in series with a motor across an external alternating current power source; a switch control circuit configured to control the controllable bi-direction alternating current switch to be turned on or turned off in a preset manner; and a delay circuit configured to delay a turn-on for the controllable bi-direction alternating current switch for a preset time to decrease a phase difference between a current flowing through the motor and a counter electromotive force. The motor driver circuit can improve a power efficiency of the motor.
Abstract:
A magnetic sensor integrated circuit, a motor and an application apparatus. The magnetic sensor includes a magnetic sensor, a signal processing unit, an output control circuit and an output port. The magnetic sensor receives a constant current sense a magnetic polarity of an external magnetic field and output a differential signal. The signal processing unit amplifies the differential signal and eliminates an offset of the differential signal to obtain a magnetic field detection signal. The output control circuit control, at least based on the magnetic field detection signal, the magnetic sensor integrated circuit to operate in at least one a first state in which a current flows from the output port to the outside and a second state in which a current flows from the outside into the output port.
Abstract:
A motor driving circuit and an application device are provided. In an embodiment, an AC switch is connected between first and second nodes. A rotational direction control circuit connects to the first and second nodes and is configured to selectively connect the first node to first terminal of an AC power supply through motor winding and connect the second node to second terminal of the AC power supply, or connect the first node to second terminal of AC power supply and connect the second node to first terminal of the AC power supply through the motor winding. A detecting circuit is configured to detect magnetic pole position of the rotor. A switch control circuit is configured to control the AC switch to be turned on or be turned off in a predetermined way based on magnetic pole position signal and potential difference between the first and second nodes.
Abstract:
A step-down circuit has a switch connected in series between a direct current power supply and a load. A switch control circuit is configured to turn the switch off when the voltage across the load is higher than a predetermined first threshold and turn the switch on when the voltage across the load is lower than the first threshold. An energy storage unit is charged by the power supply when the switch is on and supply power to the load when the switch is off An overcurrent protection circuit turns the switch off when the input current of the switch is higher than a predetermined second threshold.
Abstract:
A drive circuit for an electric motor, has a driving source unit, configured to generate a driving source signal and a driving unit, connected to the motor and configured to drive the motor according to the driving source signal. A sensing unit senses the actual speed of the motor. A control unit stops operation of the motor when the actual speed of the motor falls below a predetermined level. A timing unit counts a predetermined time period from the time the motor stops operation. The motor resumes operation at the end of the predetermined time period.