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1. 发明申请

US20110148324A1 METHODS AND SYSTEMS FOR LED DRIVER HAVING CONSTANT OUTPUT CURRENT 有权
标题翻译：具有恒定输出电流的LED驱动器的方法和系统
公开(公告)号：US20110148324A1
公开(公告)日：2011-06-23
申请号：US12698829
申请日：2010-02-02
申请人： Hongyue Du , Xinfeng Liu , Wei Zhang , Jiusheng Zhang , Hongbo Zhang
发明人： Hongyue Du , Xinfeng Liu , Wei Zhang , Jiusheng Zhang , Hongbo Zhang
IPC分类号： H05B41/36
CPC分类号： H05B33/0812 , Y02B20/345
摘要： A control circuit for a switched mode power supply includes a transconductance amplifier circuit for receiving a voltage signal related to a current from an input of the power supply and producing a first signal, an analog signal processor coupled to the amplifier circuit for receiving the first signal and a second signal from the input of the power supply and a third signal from an output of the power supply. The analog signal processor is configured to produce a fourth signal as a function of the first, the second, and the third signals. An adder circuit is coupled to the fourth signal and a dimmer control signal, and the adder circuit is configured to output a fifth signal. A comparator circuit is coupled to the adder circuit for providing a control signal to a power transistor that controls current flow in the power supply based on comparison of the fifth signal and a reference signal.
摘要翻译：用于开关模式电源的控制电路包括跨导放大器电路，用于从电源的输入端接收与电流相关的电压信号并产生第一信号;耦合到放大器电路的模拟信号处理器，用于接收第一信号以及来自电源的输入的第二信号和来自电源的输出的第三信号。模拟信号处理器被配置为产生作为第一信号，第二信号和第三信号的函数的第四信号。加法器电路耦合到第四信号和调光控制信号，并且加法器电路被配置为输出第五信号。比较器电路耦合到加法器电路，用于根据第五信号和参考信号的比较，向控制电源中的电流的功率晶体管提供控制信号。

2. 发明授权

US08344656B2 Methods and systems for LED driver having constant output current 有权
标题翻译：具有恒定输出电流的LED驱动器的方法和系统
公开(公告)号：US08344656B2
公开(公告)日：2013-01-01
申请号：US12698829
申请日：2010-02-02
申请人： Hongyue Du , Xinfeng Liu , Wei Zhang , Jiusheng Zhang , Hongbo Zhang
发明人： Hongyue Du , Xinfeng Liu , Wei Zhang , Jiusheng Zhang , Hongbo Zhang
IPC分类号： H05B37/02
CPC分类号： H05B33/0812 , Y02B20/345
摘要： A control circuit for a switched mode power supply includes a transconductance amplifier circuit for receiving a voltage signal related to a current from an input of the power supply and producing a first signal, an analog signal processor coupled to the amplifier circuit for receiving the first signal and a second signal from the input of the power supply and a third signal from an output of the power supply. The analog signal processor is configured to produce a fourth signal as a function of the first, the second, and the third signals. An adder circuit is coupled to the fourth signal and a dimmer control signal, and the adder circuit is configured to output a fifth signal. A comparator circuit is coupled to the adder circuit for providing a control signal to a power transistor that controls current flow in the power supply based on comparison of the fifth signal and a reference signal.
摘要翻译：用于开关模式电源的控制电路包括跨导放大器电路，用于从电源的输入端接收与电流相关的电压信号并产生第一信号;耦合到放大器电路的模拟信号处理器，用于接收第一信号以及来自电源的输入的第二信号和来自电源的输出的第三信号。模拟信号处理器被配置为产生作为第一信号，第二信号和第三信号的函数的第四信号。加法器电路耦合到第四信号和调光控制信号，并且加法器电路被配置为输出第五信号。比较器电路耦合到加法器电路，用于根据第五信号和参考信号的比较，向控制电源中的电流的功率晶体管提供控制信号。

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