Abstract: A controller of a power converter is provided. The controller is coupled to a power output stage, provides a control signal thereto to generate an output voltage, and includes an analog-to-digital conversion circuit, a search circuit, a compensation circuit, and a pulse width modulation circuit. The analog-to-digital conversion circuit is coupled to the power output stage and is configured to output an error signal according to a feedback voltage related to the output voltage and a reference voltage. The search circuit is coupled to the analog-to-digital conversion circuit and searches according to the error signal to obtain search values. The compensation circuit is coupled to the search circuit and generates a duty cycle signal according to the search values. The pulse width modulation circuit is coupled to the compensation circuit and generates the control signal according to the duty cycle ratio signal to be provided to the power output stage.

Abstract: A power switch circuit is provided. The power switch circuit includes a power switch, a sensing circuit, a selecting circuit and a modulating circuit. The power switch has an output terminal for providing an output voltage and an output current. The sensing circuit is coupled to the power switch, senses the output current and outputs a current sensing signal. The selecting circuit is respectively coupled to the output terminal and the sensing circuit. The selecting circuit controls the sensing circuit according to the output voltage, so that the sensing circuit selectively outputs a first sensing current or a second sensing current as the current sensing signal. The modulating circuit is coupled to the sensing circuit and a control terminal of the power switch. The modulating circuit outputs a controlling voltage to the control terminal of the power switch, and modulates the controlling voltage according to the current sensing signal.

Abstract: A smart power stage module includes an output stage and a driving circuit. The output stage includes a low-side switch and provides an output current. The driving circuit controls an operation of the output stage according to a PWM signal. The driving circuit includes a determination circuit generating a control signal according to the PWM signal and a signal combination circuit providing a current monitoring signal representing the output current. The current monitoring signal is a combination of a simulated current signal and an actual sensed current signal. The signal combination circuit includes a switching circuit switching according to the control signal to adjust a proportion of simulated current signal and actual sensed current signal. When the on-time period part of low-side switch is shorter than a default time period, the switching circuit shortens duration of simulated current signal in the current monitoring signal according to the control signal.

Abstract: A controller of a buck-boost conversion circuit and a mode switching method thereof are provided. The controller control operations of multiple switches of the buck-boost conversion circuit to convert an input voltage into an output voltage and provide an output current. The controller includes a slope compensation circuit, a control loop, and a mode switching circuit. The slope compensation circuit generates a slope compensation signal according to a mode switching signal of a current cycle. The control loop is coupled to the slope compensation circuit and the switches respectively, and is configured to generate multiple switch control signals according to the slope compensation signal, a feedback voltage related to the output voltage, and a current sense signal related to the output current to control the operations of the switches respectively. The mode switching circuit is coupled to the slope compensation circuit and the control loop.

Abstract: A battery secondary protection circuit includes a first pin, a second pin, a first sensing circuit, a first current source, a first enabling circuit and a first protection circuit. The first pin and the second pin are coupled to two terminals of a first battery. The first sensing circuit, coupled between the first pin and second pin, provides a first sensing signal and a second sensing signal. The first current source, coupled between the first pin and second pin, provides a first current. The first enabling circuit, coupled to the first sensing circuit and first current source, generates a first enabling signal according to the first sensing signal. The first protection circuit is coupled to the first sensing circuit. When the first enabling signal enables the first current source, the first protection circuit generates a first protection signal according to a second sensing signal changed with the first current.

Abstract: A smart power stage (SPS) circuit of a power converter and a current monitoring circuit thereof are disclosed. The SPS circuit includes an output stage circuit and a driver. The output stage circuit receives an input voltage and the power converter provides an output voltage and an inductor current. The driver includes a driving circuit, a monitoring signal generation circuit and a compensation circuit. The driving circuit receives a PWM signal and provides a driving signal to the output stage circuit. The monitoring signal generation circuit receives the PWM signal, input voltage and output voltage for generating a monitoring signal related to the inductor current. The monitoring signal includes a simulated current signal. The compensation circuit is coupled to the monitoring signal generation circuit. When the simulated current signal is greater than a default value, the compensation circuit generates a compensation signal superposing to the simulated current 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 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.