公开(公告)号：US08674605B2

公开(公告)日：2014-03-18

申请号：US13354389

申请日：2012-01-20

Applicant: Voravit Puvanakijjakorn ,  Sean Lei ,  Arunava Dutta

Inventor： Voravit Puvanakijjakorn ,  Sean Lei ,  Arunava Dutta

IPC: H05B37/00

CPC classification number: H05B33/0845 ,  H05B33/0809

Abstract: A solid state light source driver circuit, system and method are provided. The driver circuit includes a rectifier circuit, an energy storage element coupled thereto, a current bleeder circuit coupled thereto, and a switch. The rectifier circuit receives AC input and provides unregulated DC voltage. The switch closes to couple some of the unregulated DC voltage to the energy storage element, and opens to transfer energy to drive the light source. A power factor controller circuit provides an output signal to control the switch. The current bleeder circuit provides supply voltage to the power factor controller circuit within a range and maintains a current flow associated with the AC input that exceeds a predetermined threshold. A constant off-time controller circuit provides a switching frequency control signal to the power factor controller circuit. An EMI filter reduces generated EMI noise.

Abstract translation: 提供固态光源驱动电路，系统和方法。 驱动器电路包括整流器电路，与其耦合的能量存储元件，耦合到其上的电流泄放电路和开关。 整流电路接收交流输入并提供未调节的直流电压。 开关闭合以将一些未调节的DC电压耦合到能量存储元件，并且打开以传递能量以驱动光源。 功率因数控制器电路提供输出信号来控制开关。 电流泄放电路在一个范围内向功率因数控制器电路提供电源电压并维持与超过预定阈值的AC输入相关联的电流。 恒定的关断时间控制器电路向功率因数控制器电路提供开关频率控制信号。 EMI滤波器可降低产生的EMI噪声。

公开(公告)号：US20120286663A1

公开(公告)日：2012-11-15

申请号：US13354389

申请日：2012-01-20

Applicant: Voravit Puvanakijjakorn ,  Sean Lei ,  Arunava Dutta

Inventor： Voravit Puvanakijjakorn ,  Sean Lei ,  Arunava Dutta

IPC: H05B37/02

CPC classification number: H05B33/0845 ,  H05B33/0809

Abstract: A solid state light source driver circuit, system and method are provided. The driver circuit includes a rectifier circuit, an energy storage element coupled thereto, a current bleeder circuit coupled thereto, and a switch. The rectifier circuit receives AC input and provides unregulated DC voltage. The switch closes to couple some of the unregulated DC voltage to the energy storage element, and opens to transfer energy to drive the light source. A power factor controller circuit provides an output signal to control the switch. The current bleeder circuit provides supply voltage to the power factor controller circuit within a range and maintains a current flow associated with the AC input that exceeds a predetermined threshold. A constant off-time controller circuit provides a switching frequency control signal to the power factor controller circuit. An EMI filter reduces generated EMI noise.

Abstract translation: 提供固态光源驱动电路，系统和方法。 驱动器电路包括整流器电路，与其耦合的能量存储元件，耦合到其上的电流泄放电路和开关。 整流电路接收交流输入并提供未调节的直流电压。 开关闭合以将一些未调节的DC电压耦合到能量存储元件，并且打开以传递能量以驱动光源。 功率因数控制器电路提供输出信号来控制开关。 电流泄放电路在一个范围内向功率因数控制器电路提供电源电压并维持与超过预定阈值的AC输入相关联的电流。 恒定的关断时间控制器电路向功率因数控制器电路提供开关频率控制信号。 EMI滤波器可降低产生的EMI噪声。