公开(公告)号：US20140028213A1

公开(公告)日：2014-01-30

申请号：US13833587

申请日：2013-03-15

Applicant: CIRRUS LOGIC, INC.

Inventor： Mohit Sood ,  Spencer Isaacson ,  Rahul Singh ,  Zhaohui He

IPC: H03K17/14 ,  H05B33/08

CPC classification number: H02M3/33523 ,  H02M3/335 ,  H03K17/145 ,  H05B33/0815 ,  H05B33/0848 ,  H05B33/0884 ,  Y02B20/341 ,  Y10T307/406 ,  Y10T307/832

Abstract: A system and method include a controller that reduces power dissipated by a switch, such as a source-controlled field effect transistor, when an estimated amount of power dissipated by the switch exceeds a predetermined threshold. Reducing the power dissipated by the switch prevents damage to the switch due to overheating. The controller determines the estimated amount of power dissipated by the switch using actual drain-to-source current and drain voltage data. In at least one embodiment, the controller includes a fail-safe, estimated power dissipation determination path that activates when the drain voltage data fails a reliability test. Additionally, in at least one embodiment, the controller includes a model of thermal characteristics of the switch. In at least one embodiment, the controller utilizes real-time estimated power dissipation by the switch and the model to determine when the estimated power dissipated by the switch exceeds a power dissipation protection threshold.

Abstract translation: 一种系统和方法包括当由开关消耗的估计功率超过预定阈值时，降低由诸如源极控制场效应晶体管的开关消耗的功率的控制器。 降低开关消耗的功率可以防止由于过热而损坏开关。 控制器使用实际的漏极 - 源极电流和漏极电压数据确定开关耗散的功率的估计量。 在至少一个实施例中，控制器包括故障安全的估计功率耗散确定路径，当漏极电压数据失败可靠性测试时激活。 另外，在至少一个实施例中，控制器包括开关的热特性模型。 在至少一个实施例中，控制器利用开关和模型的实时估计的功率消耗来确定由开关消耗的估计功率何时超过功率耗散保护阈值。

公开(公告)号：US09599977B1

公开(公告)日：2017-03-21

申请号：US14198076

申请日：2014-03-05

Applicant: Cirrus Logic, Inc.

Inventor： Jean C. Pina ,  John L. Melanson ,  Robert T. Grisamore ,  Eric J. King ,  Spencer Isaacson

IPC: G05D3/12 ,  G05B19/042 ,  G05B19/05

CPC classification number: G05B19/054 ,  G05B19/0423 ,  G05B19/0428

Abstract: A power train may have a power train input and a power train output, wherein the power train is configured to transfer electrical energy from the power train input to a load coupled to the power train output in conformity with one or more power train control signals. A scheduler may be configured to receive events from the power train and, responsive to each particular event, schedule execution of a thread of control instructions responsive to the particular event, wherein the thread is selected from a plurality of threads. A processor may be configured to execute the threads of control instructions scheduled by the scheduler, such that for each particular event the processor generates one or more power train control signals responsive to the particular event within a first switching cycle of receipt of the particular event or within a second switching cycle immediately subsequent to the first switching cycle.

公开(公告)号：US09184666B2

公开(公告)日：2015-11-10

申请号：US13833587

申请日：2013-03-15

Applicant: Cirrus Logic, Inc.

Inventor： Mohit Sood ,  Spencer Isaacson ,  Rahul Singh ,  Zhaohui He

IPC: H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  H02M3/335 ,  H03K17/14 ,  H05B33/08

CPC classification number: H02M3/33523 ,  H02M3/335 ,  H03K17/145 ,  H05B33/0815 ,  H05B33/0848 ,  H05B33/0884 ,  Y02B20/341 ,  Y10T307/406 ,  Y10T307/832

Abstract: A system and method include a controller that reduces power dissipated by a switch, such as a source-controlled field effect transistor, when an estimated amount of power dissipated by the switch exceeds a predetermined threshold. Reducing the power dissipated by the switch prevents damage to the switch due to overheating. The controller determines the estimated amount of power dissipated by the switch using actual drain-to-source current and drain voltage data. In at least one embodiment, the controller includes a fail-safe, estimated power dissipation determination path that activates when the drain voltage data fails a reliability test. Additionally, in at least one embodiment, the controller includes a model of thermal characteristics of the switch. In at least one embodiment, the controller utilizes real-time estimated power dissipation by the switch and the model to determine when the estimated power dissipated by the switch exceeds a power dissipation protection threshold.

Abstract translation: 一种系统和方法包括当由开关消耗的估计功率超过预定阈值时，减少由诸如源极控制的场效应晶体管等开关消耗的功率的控制器。 降低开关消耗的功率可以防止由于过热而损坏开关。 控制器使用实际的漏极 - 源极电流和漏极电压数据确定开关耗散的功率的估计量。 在至少一个实施例中，控制器包括故障安全的估计功率耗散确定路径，当漏极电压数据失败可靠性测试时激活。 另外，在至少一个实施例中，控制器包括开关的热特性模型。 在至少一个实施例中，控制器利用开关和模型的实时估计的功率消耗来确定由开关消耗的估计功率何时超过功率耗散保护阈值。