A driver circuit includes three sub-circuits. A first sub-circuit is configured to generate a drive current output by the driver circuit through an output node during first and second regions of operation and includes: a diode coupled to the output node and a first transistor, and a second transistor coupled to the first transistor and a current mirror. A second sub-circuit is configured to generate the drive current during the first and second and a third region of operation and includes: a third transistor coupled to the output node; and a fourth transistor. A third sub-circuit is configured to generate the drive current during the third region of operation and includes: a current source coupled to the current mirror and a buffer; and a fifth transistor coupled to the third transistor and the fourth transistor and configured to receive an output of the buffer.

The present invention provides an anti-pinch detection method and system comprising: determining a first current change rate according to a current collected in a present period and a previous period; determining a second current change rate according to the current collected in the present period and a target period, there being N periods between the target period and present period; detecting whether a closure component encounters an obstacle according to the second current change rate. If yes, determining the stiffness of the obstacle according to the first current change rate; determining a real-time obstacle compression distance according to a contact position zero point and a motor position collected in real time; and determining a real-time anti-pinch force according to the stiffness of the obstacle and the real-time obstacle compression distance, and controlling a motor to reverse when the real-time anti-pinch force is greater than a preset anti-pinch detection threshold.

A device for supplying power to an inductive load, including an H-bridge switching structure, the switching structure being designed to drive a current in the inductive load through a first control output and a second control output, an anomaly detector designed to generate an item of anomaly detection information about the detection of an anomaly at the switching structure, the anomaly detector including a first voltage generator, a second voltage generator, a first current measuring device, a second current measuring device designed to measure a current at the output of the second voltage generator, a third current measuring device, a fourth current measuring device, a fifth current measuring device and a sixth current measuring device, the current measuring devices being designed to respectively measure the currents of the switches.

A system includes a remote electronic tilt phase shifter module, a motor, a mechanical linkage that connects the motor to the remote electronic tilt phase shifter module, a current management circuit that generates a motor control signal responsive to a current control signal, and a driver circuit that is configured to selectively connect the motor to a power supply in response to the motor control signal.

An opening/closing body drive device includes: a motor which opens or closes an opening/closing body; a drive unit which rotates the motor; and a control unit which controls the drive unit. The drive unit includes a first and second integrated circuits having first and second switching elements and third and fourth switching elements which are connected to each other in series with respect to a power source and connection points of which are connected to one and the other terminals of the motor, respectively. The control unit turn-on drives the first and fourth switching elements or the second and third switching elements when driving the motor to be rotated forward or reversely. The control unit turn-on drives any one of the second and third switching elements when braking the motor during the forward rotation of the motor.

An embodiment driver circuit comprises a power supply pin configured to receive a power supply voltage, and a set of control pins configured to provide a set of control signals for controlling switching of a set of switches of an h-bridge circuit comprising a pair of high-side switches and a pair of low-side switches. The driver circuit comprises control circuitry coupled to the control pins and configured to generate the control signals, and sensing circuitry coupled to the power supply pin and configured to generate a detection signal indicative of the power supply voltage exceeding a threshold value. The control circuitry is sensitive to the detection signal and is configured to generate the control signals to activate one of the pair of high-side switches and the pair of low-side switches and de-activate the other of the pair of high-side switches and the pair of low-side switches.

A motor system with an input for coupling to a motor control signal that, when presented in a predetermined state, indicates a motor receiving power should be disabled from rotating. The system also includes controller circuitry for providing a disabling signal to motor rotation, independent of processor software control signaling and the power, in response to the control signal.

An electromotive furniture drive includes an adjustment drive for the electromotive movement of a movable furniture component relative to a further furniture component, a control device, and an operating unit. A motor of the adjustment drive is actuated as a function of signals from the operating unit. The control device includes a semiconductor power switch for switching a motor current of the motor, with a voltage dropping across the semiconductor power switch being supplied to an evaluation unit in order to detect commutation edges of the motor.

A motor controller configured to reduce the motor noise by detecting the zero point of the motor current is disclosed. The motor controller comprises a switch circuit, a pre-driver, a phase detecting unit, a control unit, a comparator, a first resistor, and a second resistor. The switch circuit is an H-bridge circuit. The switch circuit includes a first upper-side switch, a second upper-side switch, a first lower-side switch, and a second lower-side switch. When the motor controller performs the last pulse width modulation driving with respect to the first lower-side switch before phase switching, the second upper-side switch is turned off and the first lower-side switch is kept turning on, so as to facilitate the detection of the zero point of the motor current.

An integrated circuit includes an H-bridge circuit having a first output node for coupling to a high-side terminal of an inductor and a second output node for coupling to a low-side terminal of the inductor. A current source is coupled in series with a current sense FET between a digital upper supply voltage and the first output node, wherein during a fast decay mode, a gate of the current sense FET is coupled to be turned on. A current-sense comparator includes a first input coupled to a sensing node between the current source and the current sense FET, a second input coupled to the lower supply voltage and an output coupled to a driver control circuit.