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1.发明授权公开(公告)号：US10389249B2
公开(公告)日：2019-08-20
申请号：US16009374
申请日：2018-06-15
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hong-Wei Huang , Yu-Kai Lin , Wei-Chuan Wu
Abstract: A switching regulator having adjustable inductor current threshold employs a control method which includes: (S1) determining whether an output voltage is greater than a reference voltage or determining whether a switching frequency of the power stage is smaller than a predetermined lower frequency limit, and (S2) when it is determined yes in the step (S1), adjusting the inductor current threshold, such that the switching regulator operates under a pseudo discontinuous conduction mode (PDCM) wherein the switching frequency is not smaller than the predetermined lower frequency limit. Consequently, when the switching regulator operates under a light load mode, an optimum balance between a total power consumption and switching noise interference will be ensured.
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2.发明申请公开(公告)号：US20190006946A1
公开(公告)日：2019-01-03
申请号：US16009374
申请日：2018-06-15
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hong-Wei Huang , Yu-Kai Lin , Wei-Chuan Wu
CPC classification number: H02M3/158 , H02M1/088 , H02M2001/0025
Abstract: A switching regulator having adjustable inductor current threshold employs a control method which includes: (S1) determining whether an output voltage is greater than a reference voltage or determining whether a switching frequency of the power stage is smaller than a predetermined lower frequency limit, and (S2) when it is determined yes in the step (S1), adjusting the inductor current threshold, such that the switching regulator operates under a pseudo discontinuous conduction mode (PDCM) wherein the switching frequency is not smaller than the predetermined lower frequency limit. Consequently, when the switching regulator operates under a light load mode, an optimum balance between a total power consumption and switching noise interference will be ensured.
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