Abstract: A control circuit of a power converter and a control method thereof are provided. The control circuit includes an error amplifier, a controller, a digital filter, and a digital pulse width signal modulator. The error amplifying circuit is coupled to an output terminal of the power converter and provides a digital error signal. The controller provides a first working parameter corresponding to the first external control command when receiving a first external control command. The digital filter generates a current digital compensation value. The digital pulse width signal modulator generates a pulse width modulation signal. The controller provides a second working parameter corresponding to the second external control command when receiving a second external control command. The controller calculates a transition value according to the second working parameter and the current digital compensation value. The controller provides the second working parameter and the transition value to the digital filter.

Abstract: A level shifter circuit of a driving device includes first and second pulse generators, first and second level shifters, and a determination circuit. The first pulse generator provides a first input signal according to a high-voltage signal. The first input signal includes a pulse signal having a first current level and a sustain signal having a second current level following the pulse signal. The first level shifter receives the first input signal to generate a first indication signal. The second pulse generator provides a second input signal according to the high-voltage signal. The second input signal includes the pulse signal and the sustain signal following the pulse signal. The second level shifter receives the second input signal to generate a second indication signal. The determination circuit generates a low-voltage signal according to the first indication signal and the second indication signal.

Abstract: A current sensing circuit includes a filtering circuit, an amplifier, a first resistor, a first transistor and a second transistor. The filtering circuit is coupled to two terminals of a sensing resistor. The amplifier has a first input terminal, a second input terminal and an output terminal. The second input terminal is coupled to the filtering circuit. The first resistor is coupled between the filtering circuit and the first input terminal of amplifier. A control terminal of the first transistor is coupled to the output terminal of amplifier, and its first terminal is coupled to the first input terminal of amplifier and its second terminal is grounded through a second resistor. A control terminal of the second transistor is coupled to the output terminal of amplifier, and its first terminal is coupled to the second input terminal of amplifier and its second terminal is grounded through a third resistor.

Abstract: A level shifter circuit of a driving device includes first and second pulse generators, first and second level shifters, and a determination circuit. The first pulse generator provides a first input signal according to a high-voltage signal. The first input signal includes a pulse signal having a first current level and a sustain signal having a second current level following the pulse signal. The first level shifter receives the first input signal to generate a first indication signal. The second pulse generator provides a second input signal according to the high-voltage signal. The second input signal includes the pulse signal and the sustain signal following the pulse signal. The second level shifter receives the second input signal to generate a second indication signal. The determination circuit generates a low-voltage signal according to the first indication signal and the second indication signal.

Abstract: A power switch circuit with current sensing is disclosed. The power switch circuit is coupled between an input voltage and an output terminal. The power switch circuit includes a power switch, a first sensing switch, an adjusting circuit and a second sensing switch. The power switch is coupled to the input voltage. The first sensing switch is coupled in series between the power switch and the output terminal. There is a first node between the first sensing switch and the power switch. The adjusting circuit is coupled to the first node. The second sensing switch is coupled between the adjusting circuit and the output terminal. A control terminal of the power switch is coupled to a first control voltage. Control terminals of the first sensing switch and the second sensing switch are coupled to a second control voltage. The second control voltage is different from the first control voltage.

Abstract: An emulated current generation circuit of a power converting circuit, providing an emulated current includes an AC component current and a DC component current, includes a first current circuit, a second current circuit, a combination circuit and a calibration circuit. The first current circuit generates a ramp signal as the AC component current. The second current circuit is coupled to an output stage of power converting circuit to provide a sensing current. The DC component current is generated after performing a sample-and-hold processing on the sensing current. The combination circuit is coupled to the first current circuit and second current circuit respectively to combine the AC component current and DC component current into an emulated sensing current. The calibration circuit is coupled to the first current circuit, second current circuit and combination circuit to dynamically adjust the ramp signal according to the emulated sensing current and sensing current.

Abstract: A control circuit of a power converter includes a first sensing circuit, a reference voltage generation circuit, an error amplifying circuit and a PWM circuit. The first sensing circuit, coupled to a first output circuit, provides a first current sensing signal. The reference voltage generation circuit, coupled to the first sensing circuit, provides a reference voltage according to the first current sensing signal. The error amplifying circuit, coupled to the reference voltage generation circuit, receives the reference voltage and an output feedback voltage of the power converter to provide an error amplifying signal. The PWM circuit, coupled between the error amplifying circuit and the first output circuit, receives the error amplifying signal and provides a control signal to control the first output circuit. The reference voltage generation circuit further receives the error amplifying signal and adjusts the reference voltage it generates according to the error amplifying signal.

Abstract: A control circuit of a power converter and a control method thereof are provided. The control circuit includes an error amplifier, a controller, a digital filter, and a digital pulse width signal modulator. The error amplifying circuit is coupled to an output terminal of the power converter and provides a digital error signal. The controller provides a first working parameter corresponding to the first external control command when receiving a first external control command. The digital filter generates a current digital compensation value. The digital pulse width signal modulator generates a pulse width modulation signal. The controller provides a second working parameter corresponding to the second external control command when receiving a second external control command. The controller calculates a transition value according to the second working parameter and the current digital compensation value. The controller provides the second working parameter and the transition value to the digital filter.

Abstract: A control circuit of a power converter includes a sensing circuit, a ramp signal generator, an error amplifier, a comparator and a PWM circuit. The sensing circuit, coupled to a first output circuit, provides a current sensing signal. The ramp signal generator, coupled to the sensing circuit, receives the current sensing signal to provide a ramp signal. The error amplifier receives a reference voltage and an output feedback voltage of the power converter to provide an error amplification signal. The comparator, coupled to the ramp signal generator and the error amplifier, provides a control signal according to the ramp signal and the error amplification signal. The PWM circuit, coupled between the comparator and the first output circuit, receives the control signal and provides a PWM signal to control the first output circuit. The ramp signal generator adjusts a slope of the ramp signal according to the current sensing signal.

Abstract: A control circuit of a power converter includes a sensing circuit, a ramp signal generation circuit and a PWM circuit. The sensing circuit, coupled to an output circuit, provides a current sensing signal. The ramp signal generation circuit includes a transient circuit and a signal generation circuit. The transient circuit receives the current sensing signal and generates a variable reference voltage. The signal generation circuit provides a ramp signal according to the variable reference voltage. The PWM circuit provides a PWM signal to the output circuit according to the ramp signal. When current sourcing occurs, it continues for a first default time. A transient state during current sourcing continues for a second default time less than first default time. The variable reference voltage is changed from a default value to an adjusted value during the second default time and restored to the default value after the second default time.

Abstract: Provided is a method of forming a trench gate MOSFET. A hard mask layer is formed on a substrate. The substrate is partially removed by using the hard mask layer as a mask, so as to form a trench in the substrate. A first insulating layer and a first conductive layer are formed in the lower portion of the trench. A sacrificial layer is formed on the side surface of the upper portion of the trench, and the sacrificial layer is connected to the hard mask layer. An interlayer insulating layer is formed on the first conductive layer by a thermal oxidation process when the sacrificial layer and the hard mask layer are present. A second insulating layer and a second conductive layer are formed in the upper portion of the trench. A trench gate MOSFET is further provided.

Abstract: A control circuit of a power converter is coupled to an output stage and controls it to convert an input voltage into an output voltage and generate an output current. The control circuit includes a ripple generation circuit, a synthesis circuit, an error amplifier, a comparator and a PWM circuit. The ripple generation circuit generates a ripple signal according to an input voltage, an output voltage and output current. The synthesis circuit receives the ripple signal and a first feedback signal related to output voltage to provide a second feedback signal. The error amplifier receives the second feedback signal and a reference voltage to generate an error signal. The comparator receives a ramp signal and error signal to generate a comparison signal. The PWM circuit generates a PWM signal to control output stage according to the comparison signal. A slope of ripple signal is changed with the output current.

Abstract: A battery secondary protection circuit and a mode switching method thereof are disclosed. The battery secondary protection circuit is coupled in series with a battery primary protection circuit and has a power pin and a sensing pin. The switching method includes steps of: (S1) determining whether a voltage difference between the power pin and the sensing pin is greater than a default value; and (S2) selectively switching the battery secondary protection circuit to a first mode or a second mode according to a determination result of the step (S1). The battery secondary protection circuit delays a first delay time and a second delay time in the first mode and the second mode respectively and then performs a circuit protection operation. The first delay time is longer than the second delay time.

Abstract: A power switch circuit is disclosed. The power switch circuit includes an input terminal, an output terminal, a first switch, a second switch, a sensing switch and an adjusting circuit. The first switch is coupled to the input terminal. The second switch is coupled to the first switch and the output terminal. A first node between the first switch and the second switch has a first node voltage. A breakdown voltage of the second switch is higher than that of the first switch. The sensing switch is coupled to the input terminal and the first switch. The adjusting circuit is coupled to the first node and the sensing switch. A second node between the adjusting circuit and the sensing switch has a second node voltage. The adjusting circuit adjusts the second node voltage according to the first node voltage to make it equal to the first node voltage.

Abstract: A time signal generating circuit of a power converter and a control method thereof are provided. The time signal generating circuit includes a reference frequency generating circuit, an on-time circuit and a frequency tracking circuit. The reference frequency generating circuit provides a reference frequency signal. The on-time circuit provides an on-time signal according to a first reference signal and a second reference signal. The second reference signal is related to an output voltage of the power converter. The frequency tracking circuit is coupled to the reference frequency generating circuit and the on-time circuit, and compares frequencies of the reference frequency signal and the on-time signal within a default time to generate a tracking signal. The on-time circuit adjusts the second reference signal according to the tracking signal, so that the on-time circuit adjusts the frequency of the on-time signal.

Abstract: The disclosure provides a power conversion circuit with a multi-function pin and a multi-function setting method thereof. The multi-function pin is coupled to an external setting circuit. The power conversion circuit includes a first function circuit, a second function circuit, and a judging circuit. The first function circuit is coupled to the multi-function pin. The second function circuit is coupled to the multi-function pin. The judging circuit is coupled to the multi-function pin, the first function circuit, and the second function circuit. The judging circuit provides a setting current to the multi-function pin, so that the external setting circuit generates a voltage according to the setting current. The judging circuit judges the type of external setting circuit according to voltage so as to activate the first function circuit or the second function circuit accordingly.

Abstract: A simulation current signal generation circuit applied to a power conversion circuit is disclosed. The power conversion circuit has an output terminal and includes an output stage, a PWM circuit and an impedance component. One terminal of impedance component is coupled to the output terminal. The generation circuit includes a first current signal circuit, a second current signal circuit and a switching circuit. The first current signal circuit, coupled to another terminal of impedance component, provides a first current signal. The second current signal circuit, coupled to the output stage, senses a current of a power switch in the output stage to provide a second current signal. The switching circuit, coupled to the first current signal circuit, second current signal circuit and PWM circuit respectively, selectively outputs the first current signal or second current signal according to a PWM signal provided by the PWM circuit.

Abstract: A switched-capacitor power converting apparatus and an operating method thereof are disclosed. The switched-capacitor power converting apparatus includes an output stage, a determination circuit, a switch control circuit and a voltage regulation circuit. The output stage has an output terminal. The determination circuit is coupled to the output terminal, and generates a mode switching signal according to an output voltage of the output terminal and a reference voltage. The switch control circuit is coupled to the output stage and the determination circuit and controls the output stage to operate in a default voltage mode or an operation mode according to the mode switching signal. The voltage regulation circuit is coupled to the output terminal and the determination circuit and maintains the output voltage of the output terminal at a default value in the default voltage mode.

Abstract: A current sensing circuit is provided. The current sensing circuit includes an amplifier, an input resistor, a sensing resistor, and a feedback circuit. The amplifier has a first input terminal, a second input terminal, a third input terminal, and an output terminal. The input resistor is coupled between the first input terminal and the second input terminal of the amplifier. The sensing resistor is coupled between the second input terminal and the third input terminal of the amplifier. The feedback circuit is coupled between the first input terminal and the output terminal. When an input current flows through the sensing resistor, a voltage across the sensing resistor is equal to a voltage across the input resistor, and the feedback circuit correspondingly outputs a sensing voltage according to the input current.

Abstract: A power switch circuit is disclosed. The power switch circuit includes an input terminal, an output terminal, a power switch, a control circuit and a voltage holding circuit. The power switch is coupled between the input terminal and the output terminal. The power switch has a control terminal. The control circuit is coupled to the input terminal and the output terminal respectively. The control circuit compares a first voltage of the input terminal with a second voltage of the output terminal to generate a control signal. The voltage holding circuit is coupled to the control circuit and the control terminal. The voltage holding circuit provides a default voltage larger than 0 V to the control terminal according to the control signal.