Abstract: A battery pack includes a group of cells, a current path switch coupled to the group of cells, and a current monitoring system. The current monitoring system includes a signal detection unit, a logic unit and a current path control unit. The signal detection unit is coupled to the group of cells and/or a positive terminal of the battery pack, and used to detect at least one voltage signal of the group of cells and/or of the positive terminal of the battery pack. The logic unit is coupled to the signal detection unit, and used to generate a calculated value of a voltage signal of the at least one voltage signal and generate a logic signal according to the calculated value. The current path control unit is coupled to the logic unit and the current path switch, and used to control the current path switch according to the logic signal.

Abstract: A charging system includes a source terminal and a sink terminal. The control method of the charging system includes transmitting a bus voltage by the source terminal, determining whether the sink terminal has entered a sink attached state when the sink terminal receives the bus voltage, enabling a message transceiver of the sink terminal if the sink terminal has entered the sink attached state, transmitting a source message to the transceiver of the sink terminal by the source terminal, transmitting a request message to the source terminal by the message transceiver of the sink terminal while the source terminal transmits the source message, and continuing to enable a communication function for communicating with the sink terminal and continuing to transmit the bus voltage to the sink terminal by the source terminal when the source terminal receives the request message.

Abstract: A power converter includes first to fourth switches, a flying capacitor, an inductor, an output capacitor and a control circuit. The first to fourth switches are sequentially coupled in cascode. The first switch is used to receive an input voltage. The flying capacitor is coupled across the second switch and the third switch, the inductor is coupled to the second switch, the third switch and the output capacitor. The output capacitor is used to output an output voltage. When the input voltage is less than an input voltage threshold, the control circuit is used to switch the first to fourth switches according to a resonant frequency. When the input voltage exceeds the input voltage threshold, the control circuit switch is used to the first to fourth switches according to a regulated frequency exceeding the resonant frequency.

Abstract: A power converter includes first to fourth switches, a flying capacitor, an inductor, an output capacitor and a control circuit. The first to fourth switches are sequentially coupled in cascode. The first switch receives an input voltage, and the fourth switch is further coupled to a ground terminal. The flying capacitor is coupled across the second switch and the third switch, the inductor is coupled to the second switch, the third switch and the output capacitor. The output capacitor is used to output an output voltage. In a non-regulated mode, the control circuit switches the first to fourth switches according to a resonant frequency. In a regulated mode, the control circuit switches the first to fourth switches according to a regulated frequency exceeding the resonant frequency. When the flying capacitor is coupled to the inductor, the flying capacitor and the inductor can form a resonant circuit having the resonant frequency.

Abstract: A dimmer circuit includes a light emitting module, a first current source, a digital-to-analog converter, a switch, a second current source and a pulse width modulation generator. The light emitting module is for emitting light according to a driving current. The first current source includes a first terminal coupled to a second terminal of the light emitting module. The digital-to-analog converter is for generating a DC voltage according to a DC dimming code signal to control the first current source. The switch includes a first terminal coupled to a second terminal of the light emitting module. The second current source includes a first terminal coupled to a second terminal of the switch. The PWM generator is for generating a PWM voltage according to the PWM dimming code signal to control the second current source.

Abstract: A buck converter includes a quick response circuit, a compensator coupled to an output node, an interleaving logic circuit coupled to the compensator, a plurality of on-time generators, a plurality of OR gates coupled to the corresponding on-time generator, a plurality of power stages coupled to the corresponding OR gates, a plurality of inductors and an output capacitor. Each on-time generator is coupled to the interleaving logic circuit, an input node and the output node. The quick response circuit includes a voltage droop sensor coupled to the output node, a load frequency sensor coupled to the output node, a quick response signal generator coupled to the voltage droop sensor, a maximum quick response signal generator coupled to the voltage droop sensor and the load frequency sensor, an AND gate coupled to the quick response signal generator, the maximum quick response signal generator and the plurality of OR gates.

Abstract: A charging system includes a source terminal and a sink terminal. The control method of the charging system includes transmitting a bus voltage by the source terminal, determining whether the sink terminal has entered a sink attached state when the sink terminal receives the bus voltage, enabling a message transceiver of the sink terminal if the sink terminal has entered the sink attached state, transmitting a source message to the transceiver of the sink terminal by the source terminal, transmitting a request message to the source terminal by the message transceiver of the sink terminal while the source terminal transmits the source message, and continuing to enable a communication function for communicating with the sink terminal and continuing to transmit the bus voltage to the sink terminal by the source terminal when the source terminal receives the request message.

Abstract: A DC-DC power conversion system includes a resonant switched-capacitor converter and a controller. The resonant switched-capacitor converter is switched between a first state and a second state to generate an output voltage, and includes an input terminal, a resonant tank, an output capacitor, a first set of switches and a second set of switches. The input terminal is used to receive an input voltage. The output capacitor is used to generate the output voltage. The first set of switches is turned on in the first state and turned off in the second state according to a first control signal. The second set of switches is turned on in the second state and turned off in the first state according to a second control signal. The controller adjusts the first control signal and the second control signal according to the output voltage.

Abstract: A timing generator includes a first current source, a first switch, a second current source, a second switch, a third switch, a capacitor, a signal synthesizer, and a timing difference extractor. The first current source is for generating a first current according to the input voltage. The second current source is for generating a second current according to the input voltage. The first switch includes a control terminal for receiving a charging signal. The second switch includes a control terminal for receiving a timing difference signal. The third switch includes a control terminal for receiving a reset signal. The capacitor is coupled between a charging terminal and a ground terminal. The signal synthesizer is for generating a timing signal according to a charging voltage and a reference voltage. The timing difference extractor is for generating a timing difference signal according to the timing signal and a deformed timing signal.

Abstract: A dimmer circuit includes a light emitting module, a first current source, a digital-to-analog converter, a switch, a second current source and a pulse width modulation generator. The light emitting module is for emitting light according to a driving current. The first current source includes a first terminal coupled to a second terminal of the light emitting module. The digital-to-analog converter is for generating a DC voltage according to a DC dimming code signal to control the first current source. The switch includes a first terminal coupled to a second terminal of the light emitting module. The second current source includes a first terminal coupled to a second terminal of the switch. The PWM generator is for generating a PWM voltage according to the PWM dimming code signal to control the second current source.

Abstract: A buck converter includes a quick response circuit, a compensator coupled to an output node, an interleaving logic circuit coupled to the compensator, a plurality of on-time generators, a plurality of OR gates coupled to the corresponding on-time generator, a plurality of power stages coupled to the corresponding OR gates, a plurality of inductors and an output capacitor. Each on-time generator is coupled to the interleaving logic circuit, an input node and the output node. The quick response circuit includes a voltage droop sensor coupled to the output node, a load frequency sensor coupled to the output node, a quick response signal generator coupled to the voltage droop sensor, a maximum quick response signal generator coupled to the voltage droop sensor and the load frequency sensor, an AND gate coupled to the quick response signal generator, the maximum quick response signal generator and the plurality of OR gates.

Abstract: A wireless charging system includes a wireless power transmitter and N wireless power receivers. The wireless power transmitter includes a power input terminal for receiving an input power, and M transmission modules. Each transmission module includes a power controller, a power management unit, a bridge driver, and a transmission unit. The N wireless power receivers are for receiving N wireless power signals from N transmission units of N transmission modules respectively, and wirelessly transmitting the N communication signals to the N transmission units of the N transmission modules respectively. The M power management units of the M transmission modules are coupled to each other and transmit control signals for handshaking communication.

Abstract: A DC-DC power conversion system includes a resonant switched-capacitor converter and a controller. The resonant switched-capacitor converter is switched between a first state and a second state to generate an output voltage, and includes an input terminal, a resonant tank, an output capacitor, a first set of switches and a second set of switches. The input terminal is used to receive an input voltage. The output capacitor is used to generate the output voltage. The first set of switches is turned on in the first state and turned off in the second state according to a first control signal. The second set of switches is turned on in the second state and turned off in the first state according to a second control signal. The controller adjusts the first control signal and the second control signal according to the output voltage.

Abstract: A power converter determines a feedback signal according to a voltage signal related to an output voltage of the power converter and a reference voltage, thereby regulating the output voltage. A control circuit and method for programming the output voltage of the power converter utilize an offset current generator to inject a current or sink a current for changing the voltage signal or the reference signal, thereby adjusting the output voltage. As a result, it gets rid of complicated circuitry but provides more steps adjustment, which reduces related costs.

Abstract: A power converter determines a feedback signal according to a voltage signal related to an output voltage of the power converter and a reference voltage, thereby regulating the output voltage. A control circuit and method for programming the output voltage of the power converter utilize an offset current generator to inject a current or sink a current for changing the voltage signal or the reference signal, thereby adjusting the output voltage. As a result, it gets rid of complicated circuitry but provides more steps adjustment, which reduces related costs.

Abstract: A multiphase power converter has a plurality of phase circuits, each of which provides a phase current when being active. During single-phase operation of the multiphase power converter, an enhanced phase control circuit and method monitor the summation of the phase currents, and when the summation becomes higher than a threshold, switch the multiphase power converter to a higher power zone to increase the number of active phases. A high efficiency and high reliability multiphase power converter is thus accomplished.

Abstract: A power management unit, adapted to a wireless power system, includes: a rectifier, converts an AC power received by an input port thereof to a direct-current (DC) voltage outputted by a rectifying output terminal thereof; a first switch, wherein a first protecting capacitor is coupled between one terminal of the input port and a channel thereof; a second switch, wherein a second protecting capacitor is coupled between the other terminal of the input port and a channel thereof; a reference voltage terminal, for providing a reference voltage; and, a comparator, including two input terminals coupled to the rectifying output terminal and the reference voltage terminal respectively, and including an output terminal coupled to both the control terminals of the first switch and the second switch.

Abstract: A control chip of a driving circuit for driving a LED array shares a ground terminal with the LED array so that, without an additional winding, the driving circuit can provide a supply voltage for the control chip, implement a zero-current switching function, and implement an over-voltage protection function. Since no additional windings are needed, the related costs and the size of the driving circuit are decreased.

Abstract: A feedback signal stabilized by a capacitor and related to an output voltage of a power converter is used to acquire the output power information of the power converter, and a control circuit uses a second clock not related to the switching frequency of the power converter to count a duration time of the feedback signal being higher than a threshold. When the duration time is higher than a preset time, an abnormal output power of the power converter is distinguished and the power converter will be turned off. The feedback signal will not vary severely even if the output terminal of the power converter is interfered, and the counted duration time will not be influenced when the switching frequency is changing caused by a load changing.

Abstract: A method for reading/writing a chip in a USB type-C cable comprises converting a read/write command into unstructured vendor defined message (UVDM) that is conforming to a USB power delivery specification. Such UVDM will be delivered to the chip via a type-C configuration channel interface. The chip analyzes the UVDM to acquire the read/write command and reads or modifies the content of a non-volatile memory in the chip according to the read/write command. Due to use of the type-C configuration channel interface, which is inherent in the USB type-C cable, to read/write the chip, it needs no extra interface which otherwise increases costs.