公开(公告)号：US20150257218A1

公开(公告)日：2015-09-10

申请号：US14639843

申请日：2015-03-05

Applicant: Cirrus Logic, Inc.

Inventor： Erik J. Mentze ,  Karl Thompson

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H02M1/36 ,  H02M2001/0045 ,  H05B33/0812 ,  H05B33/0845 ,  H05B33/0851 ,  H05B33/0887 ,  H05B37/00

Abstract: Power consumption in a start-up circuit for a LED-based light bulb may be reduced by digitally switching a transistor of the start-up circuit coupled to the input voltage. When the transistor is digitally switched between on and off, a reduced amount of power is dissipated by the transistor, because it may not enter a saturation region of operation where the resistance of the transistor between drain and source terminals increases. The transistor may be coupled to a voltage regulator for generating one or more output voltages, including a supply voltage for a host controller IC. The transistor may be switched on and off by a digital signal generated by logic circuitry, which may decide to switch the transistor on and off based on a voltage level at an output of the voltage regulator.

Abstract translation: 通过数字地切换耦合到输入电压的启动电路的晶体管，可以减少基于LED的灯泡的启动电路中的功耗。 当晶体管在导通和截止之间进行数字切换时，晶体管消耗的功率减少，因为它可能不会进入饱和的工作区域，其中漏极和源极端子之间的晶体管的电阻增加。 晶体管可以耦合到电压调节器，用于产生一个或多个输出电压，包括用于主机控制器IC的电源电压。 晶体管可以由逻辑电路产生的数字信号导通和截止，逻辑电路可以基于电压调节器的输出端的电压电平决定开关晶体管。

公开(公告)号：US20150257231A1

公开(公告)日：2015-09-10

申请号：US14639925

申请日：2015-03-05

Applicant: Cirrus Logic, Inc.

Inventor： Erik J. Mentze ,  Karl Thompson

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H02M1/36 ,  H02M2001/0045 ,  H05B33/0812 ,  H05B33/0845 ,  H05B33/0851 ,  H05B33/0887 ,  H05B37/00

Abstract: Power consumption in a start-up circuit for a LED-based light bulb may be reduced by digitally switching a transistor of the start-up circuit coupled to the input voltage. When the transistor is digitally switched between on and off, a reduced amount of power is dissipated by the transistor, because it may not enter a saturation region of operation where the resistance of the transistor between drain and source terminals increases. The transistor may be coupled to a voltage regulator for generating one or more output voltages, including a supply voltage for a host controller IC. The transistor may be switched on and off by a digital signal generated by logic circuitry, which may decide to switch the transistor on and off based on a voltage level at an output of the voltage regulator.

Abstract translation: 通过数字地切换耦合到输入电压的启动电路的晶体管，可以减少基于LED的灯泡的启动电路中的功耗。 当晶体管在导通和截止之间进行数字切换时，晶体管消耗的功率减少，因为它可能不会进入饱和的工作区域，其中漏极和源极端子之间的晶体管的电阻增加。 晶体管可以耦合到电压调节器，用于产生一个或多个输出电压，包括用于主机控制器IC的电源电压。 晶体管可以由逻辑电路产生的数字信号导通和截止，逻辑电路可以基于电压调节器的输出端的电压电平决定开关晶体管。