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公开(公告)号：US20210099080A1
公开(公告)日：2021-04-01
申请号：US16924981
申请日：2020-07-09
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hsuan-Ju Chen
Abstract: An inductor current emulator circuit includes a ramp signal generation circuit and an emulator control circuit. The inductor emulator circuit generates a ramp signal for emulating an inductor current flowing through an inductor of a power stage circuit. The ramp signal generation circuit generates the ramp signal according to a first signal and a second signal. A current sense signal is related a high side switch current flowing through the high side switch or a low side switch current flowing through the low side switch. The emulator control circuit obtains a first difference integration value and a second difference integration value of differences between the current sense signal and the ramp signal during a first duration and a second duration, respectively, to generate the first signal and the second signal, respectively. Center time points of the first duration and the second duration are different from each other.
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公开(公告)号：US11418113B2
公开(公告)日：2022-08-16
申请号：US16924981
申请日：2020-07-09
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hsuan-Ju Chen
Abstract: An inductor current emulator circuit includes a ramp signal generation circuit and an emulator control circuit. The inductor emulator circuit generates a ramp signal for emulating an inductor current flowing through an inductor of a power stage circuit. The ramp signal generation circuit generates the ramp signal according to a first signal and a second signal. A current sense signal is related a high side switch current flowing through the high side switch or a low side switch current flowing through the low side switch. The emulator control circuit obtains a first difference integration value and a second difference integration value of differences between the current sense signal and the ramp signal during a first duration and a second duration, respectively, to generate the first signal and the second signal, respectively. Center time points of the first duration and the second duration are different from each other.
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公开(公告)号：US10594209B2
公开(公告)日：2020-03-17
申请号：US16171397
申请日：2018-10-26
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hsuan-Ju Chen
Abstract: A switching power converter circuit includes a power switch for operating an inductor to convert the input voltage to the output voltage to drive a load circuit; and a control circuit, including: a pulse width modulation circuit comparing an output related signal with a ramp signal to generate a pulse width modulation signal for controlling the power switch, wherein the output related signal is related to the output voltage; an error amplifier circuit generating an error amplified signal according to a difference between the output related signal and a reference signal; and a ramp signal generation circuit generating the ramp signal, wherein an amplitude of the ramp signal is determined according to the input voltage and the output voltage; and/or the slope of the ramp signal is determined according to the error amplified signal.
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公开(公告)号：US20190229612A1
公开(公告)日：2019-07-25
申请号：US16171397
申请日：2018-10-26
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hsuan-Ju Chen
Abstract: A switching power converter circuit includes a power switch for operating an inductor to convert the input voltage to the output voltage to drive a load circuit; and a control circuit, including: a pulse width modulation circuit comparing an output related signal with a ramp signal to generate a pulse width modulation signal for controlling the power switch, wherein the output related signal is related to the output voltage; an error amplifier circuit generating an error amplified signal according to a difference between the output related signal and a reference signal; and a ramp signal generation circuit generating the ramp signal, wherein an amplitude of the ramp signal is determined according to the input voltage and the output voltage; and/or the slope of the ramp signal is determined according to the error amplified signal.
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