Abstract: A current mirror calibration circuit, coupled to an error amplifier of a pulse-width modulation controller, includes a first voltage generation unit, a second voltage generation unit, a calibration unit and a current mirror circuit. During an initial period, the first voltage generation unit and second voltage generation unit provide a first default voltage and a second default voltage respectively. The current mirror circuit includes a first current unit and a second current unit. The first current unit receives an original current. The second current unit generates a mirror current having a proportional relationship with original current. The first current unit has a first node coupled to the first voltage generation unit and a second node coupled to a third default voltage. The second current unit has a third node coupled to the second voltage generation unit and calibration unit and a fourth node coupled to calibration unit and an output terminal of error amplifier.

Abstract: A DC-DC converting controller coupled to an output stage and an external resistor network and providing a pulse-width-modulation (PWM) signal to control the output stage to provide an output voltage is disclosed. The DC-DC converting controller includes a sensing circuit, a droop current circuit, a first pin and a PWM signal control loop. The sensing circuit, coupled to the output stage, provides a sensing current. The droop current circuit, coupled to the sensing circuit, provides a droop current according to the sensing current. The first pin, coupled to the droop current circuit and external resistor network, provides the droop current to make the external resistor network provide a second reference voltage. The PWM signal control loop, coupled to the external resistor network, generates a PWM signal according to the output voltage and the second reference voltage. The droop current is reduced to a default value with a default time.

Abstract: A dc-dc converting circuit and a method for controlling the same are provided. The dc-dc converting circuit includes an output stage, a mode detection circuit, a PWM signal generating circuit and a ramp signal generating circuit. The output stage provides an output voltage. The mode detection circuit provides a mode detection signal. The PWM generating circuit provides a time signal to the output stage. When the dc-dc converting circuit enters a continuous conduction mode from a discontinuous conduction mode, the ramp signal generating circuit provides a second ramp signal to the PWM signal generating circuit in a preset time according to the mode detection signal. The ramp signal generating circuit provides a first ramp signal to the PWM signal generating circuit after the preset time. A slope of the second ramp signal is greater than a slope of the first ramp signal.

Abstract: A dc-dc controller is provided. The dc-dc controller includes a current sensing pin, a zero-current comparator, a comparison circuit and a threshold adjustment circuit. The current sensing pin is coupled to an output stage to receive a current sensing signal related to the output current. The zero-current comparator is coupled to the current sensing pin, and receives the current sensing signal and a first preset value to provide a zero-current signal. The comparison circuit is coupled to the zero-current comparator and the current sensing pin, and compares the current sensing signal with a second preset value to provide an adjustment signal. The threshold adjustment circuit is coupled to the comparison circuit and the zero-current comparator, and generates the first preset value according to the adjustment signal.

Abstract: A DC-to-DC controller and a control method thereof are provided. The DC-to-DC controller couples to an output stage, and the output stage provides an output voltage and includes an upper bridge switch and a lower bridge switch. The DC-to-DC controller includes a time signal generating unit and a time signal control circuit. The time signal control circuit couples to the time signal generating unit and receives a preset voltage and the output voltage. During a soft start period, if the output voltage is lower than the preset voltage, after the upper bridge switch is turned off and before the upper bridge switch is turned on again, the time signal control circuit turns off the upper bridge switch and the lower bridge switch for a first preset time and turns on the lower bridge switch for a second preset time.

Abstract: A current mirror calibration circuit, coupled to an error amplifier of a pulse-width modulation controller, includes a first voltage generation unit, a second voltage generation unit, a calibration unit and a current mirror circuit. During an initial period, the first voltage generation unit and second voltage generation unit provide a first default voltage and a second default voltage respectively. The current mirror circuit includes a first current unit and a second current unit. The first current unit receives an original current. The second current unit generates a mirror current having a proportional relationship with original current. The first current unit has a first node coupled to the first voltage generation unit and a second node coupled to a third default voltage. The second current unit has a third node coupled to the second voltage generation unit and calibration unit and a fourth node coupled to calibration unit and an output terminal of error amplifier.

Abstract: A pulse-width modulation (PWM) controller including an output pin, a temporary voltage generation circuit and a tri-state voltage generation circuit is disclosed. The temporary voltage generation circuit includes a voltage-dividing unit and a control unit. The voltage-dividing unit is coupled to the output pin and the control unit respectively. The control unit receives an enable signal and a PWM signal. The tri-state voltage generation circuit is coupled to the temporary voltage generation circuit and the output pin and receives the enable signal, the PWM signal and a tri-state input voltage. When the PWM controller is operated in a tri-state mode, the control unit controls the voltage-dividing unit to provide a temporary voltage to the output pin according to the enable signal and PWM signal, and then the tri-state voltage generation circuit provides a tri-state voltage to the output pin according to the enable signal and PWM signal.

Abstract: A DC-DC converting controller is disclosed. The DC-DC controller includes a current sensing unit, a parameter setting pin, a parameter setting unit and an error amplifier. The current sensing unit provides a sensing current. The parameter setting pin is coupled to an external parameter setting unit. The parameter setting unit is coupled to the current sensing unit and the parameter setting pin. The parameter setting unit has an internal parameter setting unit. The parameter setting unit generates a droop current according to the external parameter setting unit and the sensing current. The error amplifier includes a first input terminal and a second input terminal. The first input terminal receives an output feedback voltage and the second input terminal receives a first reference voltage. The second input terminal is coupled to a terminal of the internal parameter setting unit.

Abstract: A DC-DC converting controller coupled to an output stage and an external resistor network and providing a pulse-width-modulation (PWM) signal to control the output stage to provide an output voltage is disclosed. The DC-DC converting controller includes a sensing circuit, a droop current circuit, a first pin and a PWM signal control loop. The sensing circuit, coupled to the output stage, provides a sensing current. The droop current circuit, coupled to the sensing circuit, provides a droop current according to the sensing current. The first pin, coupled to the droop current circuit and external resistor network, provides the droop current to make the external resistor network provide a second reference voltage. The PWM signal control loop, coupled to the external resistor network, generates a PWM signal according to the output voltage and the second reference voltage. The droop current is reduced to a default value with a default time.

Abstract: A DC-to-DC controller, a DC-to-DC power converter and a control method thereof are provided. The controller is coupled to an upper-bridge switch and a lower-bridge switch and includes a time generation unit providing a time signal, a voltage identification (VID) change determining circuit and a time control circuit. The VID change determining circuit provides a determination signal in response to a VID signal. The time control circuit provides a control signal according to the time signal and the determination signal. When the VID signal changes from high to low, the time control circuit turns off the upper-bridge switch for a first preset time according to the determination signal and the time signal, and during the first preset time, the time control circuit controls the lower-bridge switch to be turned on for a second preset time multiple times, and to be turned off for a third preset time multiple times.

Abstract: A DC-to-DC controller, a DC-to-DC power converter and a control method thereof are provided. The controller is coupled to an upper-bridge switch and a lower-bridge switch and includes a time generation unit providing a time signal, a voltage identification (VID) change determining circuit and a time control circuit. The VID change determining circuit provides a determination signal in response to a VID signal. The time control circuit provides a control signal according to the time signal and the determination signal. When the VID signal changes from high to low, the time control circuit turns off the upper-bridge switch for a first preset time according to the determination signal and the time signal, and during the first preset time, the time control circuit controls the lower-bridge switch to be turned on for a second preset time multiple times, and to be turned off for a third preset time multiple times.

Abstract: A DC-to-DC controller and a control method thereof are provided. The DC-to-DC controller couples to an output stage, and the output stage provides an output voltage and includes an upper bridge switch and a lower bridge switch. The DC-to-DC controller includes a time signal generating unit and a time signal control circuit. The time signal control circuit couples to the time signal generating unit and receives a preset voltage and the output voltage. During a soft start period, if the output voltage is lower than the preset voltage, after the upper bridge switch is turned off and before the upper bridge switch is turned on again, the time signal control circuit turns off the upper bridge switch and the lower bridge switch for a first preset time and turns on the lower bridge switch for a second preset time.

Abstract: A method with function parameter setting and an integrated circuit using the same are provided. The integrated circuit includes a function pin coupled to an external setting unit, a switch unit, and first and second function adjustment circuits. The first function adjustment circuit includes first and second current sources. The second function adjustment circuit detects a percentage of a divided voltage at the function pin, to provide a reference value and to set a second function parameter. The first function adjustment circuit uses the first current source to detect a first voltage detecting value at the function pin, and compares the first voltage detecting value with a default value. The switch unit switches the first and second current sources according to a compare result. The present invention adopts an integrated circuit for switching a plurality of current sources and detections, and may determine more resistance value setting intervals.

Abstract: A multi-phase power controller is adapted for operating N power channels and is coupled to M drivers and an external system. The M drivers respectively have an enabling pin, and the multi-phase power controller includes a power state pin and M control pins. The power state pin is coupled to the enabling pin of each of the M drivers and the external system. The M control pins are coupled to the M drivers. In a power start period of the multi-phase power controller, the number of the power channels operated by the multi-phase power controller is less than N. After the power start period, the multi-phase power controller enables the M drivers through the power state pin and notifies the external system that a power start procedure has been completed through the power state pin.

Abstract: A method with function parameter setting and an integrated circuit using the same are provided. The integrated circuit includes a function pin coupled to an external setting unit, a switch unit, and first and second function adjustment circuits. The first function adjustment circuit includes first and second current sources. The second function adjustment circuit detects a percentage of a divided voltage at the function pin, to provide a reference value and to set a second function parameter. The first function adjustment circuit uses the first current source to detect a first voltage detecting value at the function pin, and compares the first voltage detecting value with a default value. The switch unit switches the first and second current sources according to a compare result. The present invention adopts an integrated circuit for switching a plurality of current sources and detections, and may determine more resistance value setting intervals.

Abstract: A method with function parameter setting and an integrated circuit using the same are provided. The integrated circuit includes a function pin coupled to an external setting unit, a switch unit, and first and second function adjustment circuits. The first function adjustment circuit includes first and second current sources. The second function adjustment circuit detects a percentage of a divided voltage at the function pin, to provide a reference value and to set a second function parameter. The first function adjustment circuit uses the first current source to detect a first voltage detecting value at the function pin, and compares the first voltage detecting value with a default value. The switch unit switches the first and second current sources according to a compare result. The present invention adopts an integrated circuit for switching a plurality of current sources and detections, and may determine more resistance value setting intervals.

Abstract: A power converter is disclosed. The power converter includes a comparator and a timing generator. The comparator compares a first input signal with a second input signal to provide a control signal. The timing generator is coupled to the comparator. The timing generator includes a plurality of timing generating units, a logic unit, and a calculation unit. The timing generator generates a plurality of timing signals through the timing generating units and the logic unit according to the control signal, and the calculation unit forms a pulse width modulation (PWM) signal according to the timing signals. At least a part of the timing signals are overlapped.

Abstract: A method with function parameter setting and an integrated circuit using the same are provided. The integrated circuit includes a function pin coupled to an external setting unit, a switch unit, and first and second function adjustment circuits. The first function adjustment circuit includes first and second current sources. The second function adjustment circuit detects a percentage of a divided voltage at the function pin, to provide a reference value and to set a second function parameter. The first function adjustment circuit uses the first current source to detect a first voltage detecting value at the function pin, and compares the first voltage detecting value with a default value. The switch unit switches the first and second current sources according to a compare result. The present invention adopts an integrated circuit for switching a plurality of current sources and detections, and may determine more resistance value setting intervals.

Abstract: A DC-DC controller and a multi-ramp signal operating method thereof are provided. The DC-DC controller includes a ramp generating unit, a comparator, a logic circuit and a switch unit. The ramp generating unit generates a first interior-ramp signal and a second interior-ramp signal alternately. The logic circuit generates the first and second control signals according to a comparison signal of the comparator. The switch unit is configured to switch one of the first interior-ramp signal and the second interior-ramp signal alternately to a second terminal of the comparator according to the first and second control signals. When the second interior-ramp signal is switched to the comparator, the first interior-ramp signal is charged to a first voltage level by the ramp generating unit. In another switch procedure, the second interior-ramp signal is charged to a second voltage level by the ramp generating unit.

Abstract: A power converter including a multi-phase output stage, a comparator, and a time calculating unit is disclosed. The multi-phase output stage includes a plurality of channels. The comparator compares a first input signal with a second input signal to provide a setting signal. The time calculating unit adjusts on time duty cycles of the channels with the variation of the load according to the setting signal. When the load becomes larger, the frequency that the comparator provides the setting signal will be increased to cause that the on time duty cycles of the channels are overlapped.