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公开(公告)号：US10511228B2
公开(公告)日：2019-12-17
申请号：US16259707
申请日：2019-01-28
发明人： Chih-Lien Chang , Min-Rui Lai
摘要： 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.
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公开(公告)号：US11656644B2
公开(公告)日：2023-05-23
申请号：US17396823
申请日：2021-08-09
发明人： Wei-Hsiu Hung , Min-Rui Lai , Chih-Lien Chang
IPC分类号： G05F1/575
CPC分类号： G05F1/575
摘要： 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.
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公开(公告)号：US10587191B2
公开(公告)日：2020-03-10
申请号：US16262917
申请日：2019-01-31
发明人： Chih-Lien Chang , Min-Rui Lai
摘要： 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.
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公开(公告)号：US10574141B2
公开(公告)日：2020-02-25
申请号：US16296454
申请日：2019-03-08
发明人： Chih-Lien Chang , Pei-Ling Hong , Min-Rui Lai
摘要： 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.
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公开(公告)号：US20190356220A1
公开(公告)日：2019-11-21
申请号：US16294942
申请日：2019-03-07
发明人： Chih-Lien Chang , Min-Rui Lai
摘要： 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.
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公开(公告)号：US11616431B2
公开(公告)日：2023-03-28
申请号：US17511813
申请日：2021-10-27
发明人： Chih-Lien Chang , Wei-Hsiu Hung , Chun-Ming Lu , Min-Rui Lai
摘要： 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.
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公开(公告)号：US20190356223A1
公开(公告)日：2019-11-21
申请号：US16262917
申请日：2019-01-31
发明人： Chih-Lien Chang , Min-Rui Lai
摘要： 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.
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