公开(公告)号：US20150326125A1

公开(公告)日：2015-11-12

申请号：US14706587

申请日：2015-05-07

Applicant: Cirrus Logic, Inc.

Inventor： Eric J. King ,  John L. Melanson ,  Siddharth Maru

IPC: H02M3/158

CPC classification number: H03F1/083 ,  G05F1/575 ,  H02M3/158 ,  H03F1/0277 ,  H03F3/181 ,  H03F3/217 ,  H03F3/2178 ,  H03F2200/03 ,  H03F2200/372

Abstract: In accordance with embodiments of the present disclosure, a system may include an impedance estimator configured to estimate an impedance of a load and generate a target current based at least on an input voltage and the impedance, a voltage feedback loop responsive to a difference between the input voltage and an output voltage of the load, and a current controller configured to, responsive to the voltage feedback loop, the impedance estimator, and the input voltage, generate an output current to the load.

Abstract translation: 根据本公开的实施例，系统可以包括阻抗估计器，其被配置为基于至少基于输入电压和阻抗来估计负载的阻抗并产生目标电流，电压反馈环路响应于 输入电压和负载的输出电压;以及电流控制器，被配置为响应于电压反馈环路，阻抗估计器和输入电压，产生到负载的输出电流。

公开(公告)号：US09178444B2

公开(公告)日：2015-11-03

申请号：US13715914

申请日：2012-12-14

Applicant: Cirrus Logic, Inc.

Inventor： Siddharth Maru ,  Zhaohui He ,  Mohit Sood

IPC: H05B37/02 ,  H02M7/217 ,  H02M1/44 ,  H02M3/335 ,  H02M5/257 ,  H05B33/08 ,  H02M1/42 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M1/4258 ,  H02M1/44 ,  H02M3/33523 ,  H02M3/33561 ,  H02M3/33576 ,  H02M5/2576 ,  H02M7/217 ,  H02M2001/0006 ,  H02M2001/0048 ,  H05B33/0815 ,  H05B33/0845 ,  H05B37/02 ,  Y02B20/346 ,  Y02B20/347 ,  Y02B70/126 ,  Y02B70/1491

Abstract: In at least one embodiment, an electronic system and method includes a controller to control a switching power converter in at least two different modes of operation depending on whether the controller detects a dimmer or not and/or whether a load requests more power than either of the two operational modes can provide. In at least one embodiment, the controller detects whether a dimmer is phase cutting an input voltage to a switching power converter. The controller operates the switching power converter in a first mode if the dimmer is detected, and the controller operates the switching power converter in a second mode if the dimmer is not detected. The controller also transitions between operating the switching power converter in the first mode and the second mode if a status of detection of the dimmer changes.

Abstract translation: 在至少一个实施例中，电子系统和方法包括控制器，用于根据控制器是否检测到调光器和/或负载是否要求比任何一个调光器更多的功率来控制至少两种不同的操作模式的开关功率转换器 两种操作模式可以提供。 在至少一个实施例中，控制器检测调光器是否相位切割到开关功率转换器的输入电压。 如果检测到调光器，则控制器以第一模式操作开关功率转换器，并且如果未检测到调光器，则控制器在第二模式下操作开关功率转换器。 如果调光器的检测状态改变，则控制器还在第一模式中操作开关功率转换器和第二模式之间转换。

公开(公告)号：US09735671B2

公开(公告)日：2017-08-15

申请号：US14280539

申请日：2014-05-16

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Ramin Zanbaghi ,  Jieyeon Choi ,  Firas Azrai ,  Rahul Singh ,  Siddharth Maru

IPC: H05B33/08 ,  H02M3/07 ,  H02M1/08 ,  H03K17/64 ,  H02M3/335 ,  H02M1/00

CPC classification number: H02M3/07 ,  H02M1/08 ,  H02M3/335 ,  H02M2001/0006 ,  H03K17/64 ,  H05B33/0815 ,  H05B33/0845

Abstract: A bipolar junction transistor (BJT) may be used to generate a supply voltage for operating a controller, such as a lighting controller for a LED-based light bulb. A base of the BJT may receive current generated from the supply voltage to control operation of the BJT. Although the base of the BJT would be at a lower voltage than the emitter, a base drive circuit may be coupled between the emitter and the base of the BJT to increase the voltage. As one example, the base drive circuit may be a charge pump. In another example, the BJT may function as its own charge pump. In yet another example, a positive and a negative base current of the BJT may be independently controlled to regulate an output supply voltage VDD from the BJT.

公开(公告)号：US09166485B2

公开(公告)日：2015-10-20

申请号：US14203792

申请日：2014-03-11

Applicant: Cirrus Logic, Inc.

Inventor： Siddharth Maru ,  Zhaohui He

IPC: H05B37/02 ,  H02M3/335 ,  H05B33/08 ,  H02M1/42 ,  H02M3/156

CPC classification number: H02M3/33507 ,  H02M1/4258 ,  H02M3/156 ,  H05B33/0815 ,  H05B33/0848 ,  Y02B20/347 ,  Y02B70/126

Abstract: An electronic system and method includes a controller to control a switching power converter in at least two different modes of operation, a normal mode and an error reduction mode. The controller controls an amount of charge pushed (i.e. delivered) by the switching power converter to a load to reduce a charge quantization error. The charge quantization error represents an amount of charge pushed to the load beyond a target charge amount. The controller determines an amount of charge to be pushed to the load. Based on the amount of charge to be pushed to the load, the controller generates a current control signal that controls a current control switch in the switching power converter. Determination of the control signal depends on whether the controller is operating in normal mode or error reduction mode. The controller attempts to reduce the charge quantization error to avoid power fluctuations.

Abstract translation: 一种电子系统和方法包括：控制器，其以至少两种不同的操作模式，正常模式和误差降低模式来控制开关功率转换器。 控制器控制由开关功率转换器推送（即传送）到负载的电荷量，以减少电荷量化误差。 电荷量化误差表示被推到负载超过目标电荷量的电荷量。 控制器确定要向负载推送的电量。 基于将被推送到负载的电荷量，控制器产生控制开关电力转换器中的电流控制开关的电流控制信号。 控制信号的确定取决于控制器是在正常模式还是误差降低模式下运行。 控制器尝试降低电荷量化误差以避免功率波动。

公开(公告)号：US20150028764A1

公开(公告)日：2015-01-29

申请号：US14444087

申请日：2014-07-28

Applicant: Cirrus Logic, Inc.

Inventor： Siddharth Maru ,  John L. Melanson ,  Rahul Singh ,  Eric King ,  Thirumalai Rengachari ,  Ramin Zanbaghi ,  Arnab Kumar Dutta

IPC: H03K4/48 ,  H05B33/08

CPC classification number: H03K4/48 ,  H05B33/0815 ,  H05B37/02 ,  Y02B20/347

Abstract: A bipolar junction transistor (BJT) may be used in a power stage DC-to-DC converter, such as for LED-based light bulbs. The BJT may be switched on and off from a controller coupled to two terminals of the BJT. Through the two terminals, the control IC may dynamically adjust a reverse recovery time period of the BJT. The reverse recovery time period may be adjusted by changing an amount of base charge that accumulates on the BJT. Additional, the reverse recovery may be controlled through the use of a reverse base current source applied to the BJT after beginning switching off the BJT.

Abstract translation: 双极结型晶体管（BJT）可用于功率级DC-DC转换器，例如用于基于LED的灯泡。 BJT可以从耦合到BJT的两个端子的控制器接通和断开。 通过两个端子，控制IC可以动态地调整BJT的反向恢复时间段。 可以通过改变在BJT上积累的基本电荷的量来调整反向恢复时间段。 此外，可以通过在开始关闭BJT之后使用施加到BJT的反向基极电流源来控制反向恢复。

公开(公告)号：US20140252990A1

公开(公告)日：2014-09-11

申请号：US14203792

申请日：2014-03-11

Applicant: CIRRUS LOGIC, INC.

Inventor： Siddharth Maru ,  Zhaohui He

IPC: H02M3/335 ,  H05B33/08

CPC classification number: H02M3/33507 ,  H02M1/4258 ,  H02M3/156 ,  H05B33/0815 ,  H05B33/0848 ,  Y02B20/347 ,  Y02B70/126

Abstract: An electronic system and method includes a controller to control a switching power converter in at least two different modes of operation, a normal mode and an error reduction mode. The controller controls an amount of charge pushed (i.e. delivered) by the switching power converter to a load to reduce a charge quantization error. The charge quantization error represents an amount of charge pushed to the load beyond a target charge amount. The controller determines an amount of charge to be pushed to the toad. Based on the amount of charge to be pushed to the load, the controller generates a current control signal that controls a current control switch in the switching power converter. Determination of the control signal depends on whether the controller is operating in normal mode or error reduction mode. The controller attempts to reduce the charge quantization error to avoid power fluctuations.

Abstract translation: 一种电子系统和方法包括：控制器，其以至少两种不同的操作模式，正常模式和误差降低模式来控制开关功率转换器。 控制器控制由开关功率转换器推送（即传送）到负载的电荷量，以减少电荷量化误差。 电荷量化误差表示被推到负载超过目标电荷量的电荷量。 控制器确定要向蟾蜍推送的费用。 基于将被推送到负载的电荷量，控制器产生控制开关电力转换器中的电流控制开关的电流控制信号。 控制信号的确定取决于控制器是在正常模式还是误差降低模式下运行。 控制器尝试降低电荷量化误差以避免功率波动。