公开(公告)号：US09285814B1

公开(公告)日：2016-03-15

申请号：US14472110

申请日：2014-08-28

Applicant: Cirrus Logic, Inc.

Inventor： Shatam Agarwal

IPC: G05F1/56 ,  G05F1/575

CPC classification number: G05F1/575

Abstract: A feedback path may be provided within the voltage regulator to reduce the effect of a current step or load transient on the output of a voltage regulator. The feedback path may provide a fast path for stabilizing the voltage regulator after the load transient. The feedback path may be configurable to be activated or de-activated during operation of the voltage regulator. The feedback path may be activated when the voltage regulator takes over generation of an output voltage from another voltage regulator. The feedback path may then be de-activated to allow normal operation of the voltage regulator after a steady-state condition is reached.

Abstract translation: 可以在电压调节器内提供反馈路径，以减小电流步进或负载瞬变对电压调节器的输出的影响。 反馈路径可以提供用于在负载瞬变之后稳定电压调节器的快速路径。 反馈路径可以被配置为在电压调节器的操作期间被激活或去激活。 当电压调节器从另一个电压调节器接收输出电压的产生时，可以激活反馈路径。 然后反馈路径可以被去激活，以便在达到稳态条件之后允许电压调节器的正常工作。

公开(公告)号：US09209685B2

公开(公告)日：2015-12-08

申请号：US14088637

申请日：2013-11-25

Applicant: Cirrus Logic, Inc.

Inventor： Alfredo R. Linz ,  Shatam Agarwal ,  Kan Wang

IPC: H02M5/42 ,  H02M3/156 ,  H05B37/02 ,  H02M7/04 ,  H05B33/08

CPC classification number: H02M3/156 ,  H02M7/04 ,  H05B33/0851 ,  H05B37/0227

Abstract: A variable resistance device may be used in a dimmer compatibility circuit to reduce power dissipation in an integrated circuit of the dimmer compatibility circuit. For example, the integrated circuit may include switches coupled to resistors external to the integrated circuit. The integrated circuit may operate the switches to commutate among the external resistors and select a voltage drop that reduces a voltage at a drain voltage of the switches. The reduced drain voltage reduces power dissipation in the switches and instead dissipates the power in the external resistors.

Abstract translation: 可变电阻器件可用于调光器兼容性电路中以减少调光器兼容性电路的集成电路中的功率耗散。 例如，集成电路可以包括耦合到集成电路外部的电阻器的开关。 集成电路可以操作开关以在外部电阻器之间进行换向，并选择降压开关漏极电压的电压降。 降低的漏极电压降低了开关中的功耗，并消除了外部电阻器的电源。

公开(公告)号：US20150145438A1

公开(公告)日：2015-05-28

申请号：US14088637

申请日：2013-11-25

Applicant: Cirrus Logic, Inc.

Inventor： Alfredo R. Linz ,  Shatam Agarwal ,  Kan Wang

IPC: H02M3/156 ,  H02M7/04 ,  H05B33/08

CPC classification number: H02M3/156 ,  H02M7/04 ,  H05B33/0851 ,  H05B37/0227

Abstract: A variable resistance device may be used in a dimmer compatibility circuit to reduce power dissipation in an integrated circuit of the dimmer compatibility circuit. For example, the integrated circuit may include switches coupled to resistors external to the integrated circuit. The integrated circuit may operate the switches to commutate among the external resistors and select a voltage drop that reduces a voltage at a drain voltage of the switches. The reduced drain voltage reduces power dissipation in the switches and instead dissipates the power in the external resistors.

Abstract translation: 可变电阻器件可用于调光器兼容性电路中以减少调光器兼容性电路的集成电路中的功率耗散。 例如，集成电路可以包括耦合到集成电路外部的电阻器的开关。 集成电路可以操作开关以在外部电阻器之间进行换向，并选择降压开关漏极电压的电压降。 降低的漏极电压降低了开关中的功耗，并消除了外部电阻器的电源。

公开(公告)号：US09504118B2

公开(公告)日：2016-11-22

申请号：US14624475

申请日：2015-02-17

Applicant: Cirrus Logic, Inc.

Inventor： Shatam Agarwal ,  Rahul Singh

IPC: H05B33/08

CPC classification number: H05B33/0887 ,  H05B33/0815

Abstract: A bipolar junction transistor (BJT) may be used in a power stage DC-to-DC converter, such as a converter in LED-based light bulbs. The power stage may be operated by a controller to maintain a desired current output to the LED load. A resistor may be coupled to the BJT through a switch at the emitter of the BJT. The switch may regulate operation of the BJT by allowing current flow to ground through the resistor. The controller may perform measurements of the resistor to allow higher accuracy determinations of the current through the BJT and thus improve regulation of current to the LED load.

Abstract translation: 双极结型晶体管（BJT）可用于功率级DC-DC转换器，例如基于LED的灯泡中的转换器。 功率级可以由控制器操作以保持对LED负载的期望的电流输出。 电阻器可以通过BJT的发射极处的开关耦合到BJT。 开关可以通过电流流过地电流来调节BJT的工作。 控制器可以执行电阻的测量，以允许通过BJT的电流的更高的精度确定，从而改善对LED负载的电流的调节。

公开(公告)号：US20160242258A1

公开(公告)日：2016-08-18

申请号：US14624475

申请日：2015-02-17

Applicant: Cirrus Logic, Inc.

Inventor： Shatam Agarwal ,  Rahul Singh

IPC: H05B33/08

CPC classification number: H05B33/0887 ,  H05B33/0815

Abstract: A bipolar junction transistor (BJT) may be used in a power stage DC-to-DC converter, such as a converter in LED-based light bulbs. The power stage may be operated by a controller to maintain a desired current output to the LED load. A resistor may be coupled to the BJT through a switch at the emitter of the BJT. The switch may regulate operation of the BJT by allowing current flow to ground through the resistor. The controller may perform measurements of the resistor to allow higher accuracy determinations of the current through the BJT and thus improve regulation of current to the LED load.

Abstract translation: 双极结型晶体管（BJT）可用于功率级DC-DC转换器，例如基于LED的灯泡中的转换器。 功率级可以由控制器操作以保持对LED负载的期望的电流输出。 电阻器可以通过BJT的发射极处的开关耦合到BJT。 开关可以通过电流流过地电流来调节BJT的工作。 控制器可以执行电阻的测量，以允许通过BJT的电流的更高的精度确定，从而改善对LED负载的电流的调节。