Abstract: An operation power source for an operation power source supplying power to a synchronous rectifier controller is charged according to the invention. The synchronous rectifier controller controls a synchronous rectifier in response to a channel signal of the synchronous rectifier, generating SR ON times and SR OFF times. It is determined whether the channel signal resonates in a first SR OFF time, to provide an oscillation record accordingly. In a second SR OFF time after the first SR OFF time, in response to the oscillation record, a portion of resonance energy that causes the channel signal resonating is directed to charge the operation power source.

Abstract: A ripple suppressor includes a constant current generation circuit and a voltage regulation circuit. The constant current generation circuit is coupled to a light-emitting diode chain, wherein the constant current generation circuit is used for generating a detection voltage, and generating a constant current to the light-emitting diode chain. The voltage regulation circuit is coupled to the light-emitting diode chain and the voltage regulation circuit, wherein the voltage regulation circuit makes the constant current generation circuit generate the constant current according to the detection voltage and a compensation value, or makes the constant current generation circuit generate the constant current according to the detection voltage, wherein the compensation value is changed with an average voltage generated by the voltage regulation circuit, and the average voltage corresponds to a voltage of an end of the light-emitting diode chain.

Abstract: A dimming controller is capable of receiving a dimming signal to dim light-emitting device no matter the dimming signal is of DC or of PWM. A type identifier identifies whether the dimming signal received from an input node is of DC or of PWM. A multiplexer with an output is controlled by the type identifier and configured to provide at least a DC signal path and a PWM signal path both coupled between the input node and the output. The type identifier makes the multiplexer enable the DC signal path and interrupt the PWM signal path if the dimming signal is identified as of DC, and makes the multiplexer enable the PWM signal path and interrupt the DC signal path if the dimming signal is identified as of PWM.

Abstract: A ripple suppressor includes a constant current generation circuit and a voltage regulation circuit. The constant current generation circuit is coupled to a light-emitting diode chain, wherein the constant current generation circuit is used for generating a detection voltage, and generating a constant current to the light-emitting diode chain. The voltage regulation circuit is coupled to the light-emitting diode chain and the voltage regulation circuit, wherein the voltage regulation circuit makes the constant current generation circuit generate the constant current according to the detection voltage and a compensation value, or makes the constant current generation circuit generate the constant current according to the detection voltage, wherein the compensation value is changed with an average voltage generated by the voltage regulation circuit, and the average voltage corresponds to a voltage of an end of the light-emitting diode chain.

Abstract: A power delivery controller applied to a power converter includes a voltage compensation circuit and a comparator. The voltage compensation circuit is used for generating a compensation reference voltage, receiving a response signal through a universal serial bus type-C cable, and generating a response voltage when an electronic device coupled to the universal serial bus type-C cable generates the response signal corresponding to a Biphase Mark Coding (BMC) signal, wherein the response voltage and the compensation reference voltage have information relative to an internal resistor of the universal serial bus type-C cable. The comparator is used for generating a comparison signal according to the response voltage and the compensation reference voltage, wherein the power converter transmits power to the electronic device according to a specification corresponding to universal serial bus power delivery (USB-PD) after the comparator generates the comparison signal.

Abstract: A dimming controller is capable of receiving a dimming signal to dim light-emitting device no matter the dimming signal is of DC or of PWM. A type identifier identifies whether the dimming signal received from an input node is of DC or of PWM. A multiplexer with an output is controlled by the type identifier and configured to provide at least a DC signal path and a PWM signal path both coupled between the input node and the output. The type identifier makes the multiplexer enable the DC signal path and interrupt the PWM signal path if the dimming signal is identified as of DC, and makes the multiplexer enable the PWM signal path and interrupt the DC signal path if the dimming signal is identified as of PWM.

Abstract: A dimming controller is capable of receiving a dimming signal to dim light-emitting device no matter the dimming signal is of a first type or of a second type. A type identifier identifies whether the dimming signal received from an input node is of the first type or of the second type, to accordingly generate a selection signal. A signal converter generates a first signal in response to the dimming signal, and the first signal is of the first type. A multiplexer has two inputs receiving the first signal and the dimming signal respectively, and, in response to the selection signal, forwards one of the first signal and the dimming signal to a driver driving the light-emitting device.

Abstract: A dimming controller is capable of receiving a dimming signal to dim light-emitting device no matter the dimming signal is of a first type or of a second type. A type identifier identifies whether the dimming signal received from an input node is of the first type or of the second type, to accordingly generate a selection signal. A signal converter generates a first signal in response to the dimming signal, and the first signal is of the first type. A multiplexer has two inputs receiving the first signal and the dimming signal respectively, and, in response to the selection signal, forwards one of the first signal and the dimming signal to a driver driving the light-emitting device.

Abstract: A power delivery controller applied to a power converter includes a voltage compensation circuit and a comparator. The voltage compensation circuit is used for generating a compensation reference voltage, receiving a response signal through a universal serial bus type-C cable, and generating a response voltage when an electronic device coupled to the universal serial bus type-C cable generates the response signal corresponding to a Biphase Mark Coding (BMC) signal, wherein the response voltage and the compensation reference voltage have information relative to an internal resistor of the universal serial bus type-C cable. The comparator is used for generating a comparison signal according to the response voltage and the compensation reference voltage, wherein the power converter transmits power to the electronic device according to a specification corresponding to universal serial bus power delivery (USB-PD) after the comparator generates the comparison signal.