Abstract: A circuit for detecting a knee of waveform is disclosed in the present invention. The circuit detects the knee and a total oscillation time of a voltage waveform as a load switch of load circuit is turned off. In the circuit, a filter filters the voltage waveform to transmit a reference voltage to a first and a second comparator. When the first and the second comparator determine that the voltage waveform achieves a sum of the reference voltage and a set voltage, the first and the second comparator transmit a first and a second signal to a knee detection module. When the knee detection module receives the first signal rather than the second signal in an oscillation time, or receives the second signal rather than the first signal in the oscillation time, the knee detection module records the knee and trigger a time recorder computes the total oscillation time.

Abstract: A method of a charging calibration system is mainly to charge/discharge a reference touch pad, then to compute a reference charging time needed for a number of accumulated reference supply duties to reach a reference charging number, then to base on the reference charging time to charge/discharge one of operation touch pads repeatedly by a calibration supply duty, finally to count a number of the experienced calibration supply duties within the reference charging time. Thereupon, a reference charged number of an individual operation touch pad within the reference charging time can be obtained. Thus, the operation touch pad can adjust the reference charging time to meet various environmental requirements. Also, the reference supply duty is greater than the calibration supply duty.

Abstract: A driver circuit for switching switch according to capacitor voltage is disclosed in the present invention. The driver circuit is provided to drive a load circuit which includes a load resistor under a continuous conduction mode (CCM). In the driver circuit, a first current module which electrically connected to the load resistor is provided to generate a variable current. A second current module which electrically connected to the first switch and the first current module is provided to generate a constant current. A processing module is electrically connected to the first capacitor, the second capacitor and a gate of the first and the second switch. The processing module is provided to conduct one of the first switch and the second switch according to a size of the variable current and the constant current, a voltage of the first capacitor, and a voltage of the second capacitor.

Abstract: In a driving switching system, an H-bridge circuit includes a first P-type MOSFET, a first N-type MOSFET, a second P-type MOSFET and a second N-type MOSFET. The first N-type MOSFET connects to the first P-type MOSFET so as to have a first connection terminal. The second N-type MOSFET connects to the second P-type MOSFET so as to have a second connection terminal, wherein the first connection terminal and the second connection terminal are connected to a coil. A first and a second kickback voltage detection module respectively detect a first kickback voltage at the first connection terminal and a second kickback voltage at the second connection terminal. In the accompanying method, a first and a second driving module are selectively used to switch the first and second P-type MOSFET and the first and second N-type MOSFET once the first and second kickback voltages reach a first or a second threshold voltage.

Abstract: A circuit for controlling load switch is disclosed in the present invention. The circuit is applied to a load circuit which includes a load switch and a working element. The circuit includes a first comparator, a second comparator, and a third comparator. When an inductance current achieves the average current, the first comparator triggered to conduct a first switch. When the inductance current achieves a default ripple current, the second comparator is triggered to conduct a second switch. When either one of the first switch and the second switch is conducted, the load switch is turned off to make a variable voltage be increased. When the first switch is conducted, a capacitance voltage of a controlled capacitance is increased to increase a turned-off time. When the second switch is conducted, the capacitance voltage is decreased to decrease the turned-off time to control the load switch.

Abstract: A current regulation system for generating a charging current curve for charging a rechargeable battery is provided, the system including a current regulation module coupled to a power converter to output a conversion current in a constant current mode and a constant voltage mode, a voltage-to-current regulation module coupled to the rechargeable battery to output a voltage conversion current in the constant voltage mode, a temperature-to-current regulation module and a resistance. The temperature-to-current regulation module outputs a temperature conversion current in the constant current mode and the constant voltage mode. The resistance is coupled to the current regulation module, the voltage-to-current regulation module and the temperature-to-current regulation module to regulate the voltage conversion current or the temperature conversion current, the conversion current is weakened by maintain a constant value so the charging current curve is regulated when the power of the rechargeable battery is full.

Abstract: A driving switching system includes an H-bridge circuit, at least a kickback voltage detection module and at least a driving module. The H-bridge circuit includes a first P-type MOSFET, a first N-type MOSFET, a second P-type MOSFET and a second N-type MOSFET. The first N-type MOSFET connects the first P-type MOSFET to have a first connection terminal, and the second N-type MOSFET connects the second P-type MOSFET to have a second connection terminal, in which both the terminals are connected to a coil. The kickback voltage detection module is used to detect a first kickback voltage at the first connection terminal and a second kickback voltage at the second connection terminal. The driving module switches the P-type MOSFET and the N-type MOSFET so as to drive a motor as the first or the second kickback voltage reaches a first or a second threshold.

Abstract: A light load current detection system including a detection process module and a control circuit is provided for detecting a current value of a light load current of a load in a light load mode; the detection process module including a power save unit and a voltage detection module. The power save unit sends a power save signal, wherein a cycle of the power save signal corresponds to a switch state. The voltage detection module detects an input voltage value to generate and output a detection signal. The control circuit includes a data table and a threshold, the data table showing a relation among the cycle, the current value and the input voltage value. The control circuit determines if the current value reaching the threshold, the switch is turned off in the light load module.

Abstract: A semiconductor structure for electromagnetic induction sensing and a method for manufacturing the same are provided: forming the Hall sensor in a first semiconductor fabrication; forming the passivation layer above the Hall sensor to cover the Hall sensor according to the first semiconductor fabrication; and forming the current-carrying layer above the passivation layer in a second semiconductor fabrication to form the semiconductor structure for electromagnetic induction sensing. The current-carrying layer carries the current to be sensed; and the Hall sensor senses the magnetic field generated. The Hall sensor generates a voltage or a current signal proportional to the strength of the current to be sensed.

Abstract: A detection control system includes a sensing unit, a control module and a driving module for a motor including a rotor and a stator. The sensing unit electrically connects the motor to sense a first and a second magnetic pole of the rotor cross a chip disposed between the rotor and the stator; a third magnetic pole is alternated to a forth magnetic pole of the stator to generate a sensing signal. A detection unit of the control module detects a kickback voltage value generated by a first current value changing to a second current value to calculate a minimum current value to generate a detecting signal. A timing unit receives the sensing and the detecting signal to calculate a first and a second period of time, and a discharging time. The driving module drives the rotor by receiving a control signal the control unit generates by controlling an alternating time.

Abstract: A current regulation system for generating a charging current curve for charging a rechargeable battery is provided, the system including a current regulation module coupled to a power converter to output a conversion current in a constant current mode and a constant voltage mode, a voltage-to-current regulation module coupled to the rechargeable battery to output a voltage conversion current in the constant voltage mode, a temperature-to-current regulation module and a resistance. The temperature-to-current regulation module outputs a temperature conversion current in the constant current mode and the constant voltage mode. The resistance is coupled to the current regulation module, the voltage-to-current regulation module and the temperature-to-current regulation module to regulate the voltage conversion current or the temperature conversion current, the conversion current is weakened by maintain a constant value so the charging current curve is regulated when the power of the rechargeable battery is full.

Abstract: A detection control system includes a sensing unit, a control module and a driving module for a motor including a rotor and a stator. The sensing unit electrically connects the motor to sense a first and a second magnetic pole of the rotor cross a chip disposed between the rotor and the stator; a third magnetic pole is alternated to a forth magnetic pole of the stator to generate a sensing signal. A detection unit of the control module detects a kickback voltage value generated by a first current value changing to a second current value to calculate a minimum current value to generate a detecting signal. A timing unit receives the sensing and the detecting signal to calculate a first and a second period of time, and a discharging time. The driving module drives the rotor by receiving a control signal the control unit generates by controlling an alternating time.

Abstract: A method for controlling a direct current (DC) brushless motor, and a control circuit thereof are provided. The DC brushless motor is sensorless. In response to a digital output signal that is applied to drive the direct current brushless motor, detection of a back electromotive force (BEMF) is ceased in a predetermined time interval, so as to avoid detecting erroneous BEMF and keep normal operation of the direct current brushless motor.

Abstract: An adaptive pulse width control power conversion device includes a pulse width adjustable pulse frequency module (PFM) control circuit, a pulse width modulation (PWM) control circuit, a PWM/PFM switching unit, a switching circuit, and a load status detection circuit. When the power conversion device is to be switched from a PWM mode to a PFM mode, pulse width of a series of PFM control signals is sequentially adjusted from a low value to a high value according to a predetermined pulse width increment until an optimum pulse width is determined and thereafter, an output voltage is supplied to a load in the PFM mode, whereby ripple of output voltage in the PFM mode can be improved and improved stability of output of the power conversion device is realized.

Abstract: The control circuit for power supplying includes a driving module and a control module, wherein the driving module includes a first switch, a second switch, a third switch, and a fourth switch. In a first power supply mode, the first switch and the second switch are turned on, and the third switch and the fourth switch are turned off. The load current flows to the ground terminal via the first switch, the inductive load, and the second switch. When the control module sends a switching signal to the driving module, the first switch and the second switch are turned off and the third switch and the fourth switch are turned on, and the load current flows to the high potential terminal via the fourth switch, the inductive load, and the third switch due to the current inertia.

Abstract: An apparatus for starting a direct current brushless motor and a method thereof are provided. The direct current brushless motor comprises a plurality of windings. The control apparatus comprises a sense amplifier, a differential circuit, and a control circuit. The sense amplifier is configured to detect a first back electro-motive force of a non-electrified first winding. The differential circuit is configured to calculate a differential value of the first back electro-motive force. The control circuit is configured to provide a current to two of the windings and to switch the current to another two of the windings to start the direct current brushless motor.

Abstract: A switching regulation circuit for a dual-winding motor apparatus is provided. The switching regulation circuit comprises a gate-controlled device and a driving circuit. When one of the two windings generates an induced voltage signal greater than a threshold value, the driving circuit generates an output signal for turning on the gate-controlled transistor. Thereby, a parasitic diode of the gate-controlled device will not be turned on and damage the entire circuit.

Abstract: The connection system of the present invention includes a human-machine interface device and a host device. The human-machine interface device includes a signal generating module and a control module. The host device includes an operation module, an identification module and a system module. After the signal generating module generates an original working signal, the original working signal is sent to the operation module to generate a transforming signal via control module, and then the operation module sends the transforming signal back to the control module such that the control module generates a final working signal meeting an identification condition. Finally, the control module sends the final working signal to the identification module for identification such that the system module executes a predetermined work.

Abstract: The control circuit for power supplying includes a driving module and a control module, wherein the driving module includes a first switch, a second switch, a third switch, and a fourth switch. In a first power supply mode, the first switch and the second switch are turned on, and the third switch and the fourth switch are turned off. The load current flows to the ground terminal via the first switch, the inductive load, and the second switch. When the control module sends a switching signal to the driving module, the first switch and the second switch are turned off and the third switch and the fourth switch are turned on, and the load current flows to the high potential terminal via the fourth switch, the inductive load, and the third switch due to the current inertia.

Abstract: A switching regulation circuit for a dual-winding motor apparatus is provided. The switching regulation circuit comprises a gate-controlled device and a driving circuit. When one of the two windings generates an induced voltage signal greater than a threshold value, the driving circuit generates an output signal for turning on the gate-controlled transistor. Thereby, a parasitic diode of the gate-controlled device will not be turned on and damage the entire circuit.