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    • 7. 发明申请
    • LIGHT-EMITTING DIODE LIGHTING DEVICE
    • 发光二极管照明设备
    • US20100097007A1
    • 2010-04-22
    • US12579784
    • 2009-10-15
    • Masahiko KamataHajime OsakiHirokazu OtakeShinya HakutaTakuro HiramatsuToshiyuki HiraokaNaoko Iwai
    • Masahiko KamataHajime OsakiHirokazu OtakeShinya HakutaTakuro HiramatsuToshiyuki HiraokaNaoko Iwai
    • H05B41/36
    • H05B33/089H05B33/0887
    • There is provided an LED lighting device having a satisfactory temperature characteristic and a small amount of variation in output current. The step-down chopper is provided with a first circuit including the switching element, the impedance means and a first inductor connected in series and a second circuit including the first inductor and a diode connected in series. A self-excited drive signal generation circuit is provided with a second inductor magnetically coupled with the first inductor and applies a voltage induced in the second inductor to the switching element to keep the switching element on. A turn-off circuit outputs an output voltage when the voltage of the impedance means detected by a comparator exceeds the reference value, and the output voltage allows a switching element to turn on to short-circuit the output terminals of the self-excited drive signal generation circuit, resulting in that the switching element is turned off.
    • 提供了具有令人满意的温度特性和少量的输出电流变化的LED照明装置。 降压斩波器设置有包括开关元件,阻抗装置和串联连接的第一电感器的第一电路和包括串联连接的第一电感器和二极管的第二电路。 自激驱动信号产生电路具有与第一电感器磁耦合的第二电感器,并将在第二电感器中感应的电压施加到开关元件以保持开关元件导通。 当由比较器检测到的阻抗装置的电压超过参考值时,关断电路输出输出电压,并且输出电压允许开关元件导通以使自激驱动信号的输出端短路 导致开关元件断开。