公开(公告)号：US10917013B2

公开(公告)日：2021-02-09

申请号：US16692072

申请日：2019-11-22

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John L. Melanson ,  Eric J. King ,  Jason W. Lawrence

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/40 ,  H02M1/44 ,  H01F27/28 ,  H01F38/02

Abstract: A boost converter may include a first stage comprising a first dual anti-wound inductor constructed such that its windings generate opposing magnetic fields in its magnetic core, and a second stage comprising a second dual anti-wound inductor constructed such that its windings generate opposing magnetic fields in its magnetic core. The boost converter may also include control circuitry for controlling the first stage and the second stage to have a plurality of phases comprising a first phase wherein a first coil of the first dual anti-wound inductor and a second coil of the second dual anti-wound inductor are coupled in parallel between a power supply and a ground voltage and a second phase wherein the first coil of the first dual anti-wound inductor and the second coil of the second dual anti-wound inductor are coupled in series between the power supply and the ground voltage.

公开(公告)号：US10212514B2

公开(公告)日：2019-02-19

申请号：US15918705

申请日：2018-03-12

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Roger Serwy ,  Jason W. Lawrence ,  Firas Azrai ,  Jeffrey Allen May ,  Jie Su

IPC: H04R3/00 ,  H04R29/00 ,  H03F3/21 ,  H03F3/183 ,  H04R1/10 ,  H03F1/52 ,  H03G3/20

Abstract: A predictive brownout prevention system may be configured to prevent brownout of an audio output signal. Particularly, the brownout prevention system may be configured to receive information indicative of adaptive estimates of power supply conditions, wherein the information indicative of adaptive estimates of the power supply conditions comprises information regarding a voltage component and a resistive component received from an adaptive battery model of a battery for providing electrical energy to a power supply for generating the power supply voltage and adapt the adaptive battery model based on a monitored battery voltage output by the battery and loading events of the signal path and excluding loading events of components other than the signal path which are powered from the battery.