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    • 2. 发明申请
    • POWER SUPPLY APPARATUS
    • 电源设备
    • US20120300502A1
    • 2012-11-29
    • US13480505
    • 2012-05-25
    • Takae SHIMADAKimiaki TANIGUCHIHiroyuki SHOJI
    • Takae SHIMADAKimiaki TANIGUCHIHiroyuki SHOJI
    • H02M3/335
    • H02M1/4258Y02B70/126
    • A high-efficiency power supply apparatus is provided in light of the reduction of the switching loss. The power supply apparatus connected between the AC power supply and the DC load converts the AC power supplied from the AC power supply to the DC power and supplies it to the DC load. The power supply apparatus comprises the first switching circuit for outputting the switched positive and negative voltages to the primary winding of the transformer, a second switching circuit for supplying the DC power induced in the secondary winding of the transformer and switched to the DC load connected to the second AC terminals, a resonance inductor serial-connected to the primary winding, and a control unit for controlling the switching operations performed by the first and second switching circuits. The control unit substantially short-circuits the second AC terminals by controlling the switching operations performed by the second switching circuit.
    • 鉴于开关损耗的降低,提供了高效率的电源装置。 连接在AC电源和DC负载之间的电源装置将从AC电源提供的AC电力转换为DC电力并将其提供给DC负载。 电源装置包括:第一开关电路,用于将开关正电压和负电压输出到变压器的初级绕组;第二开关电路,用于提供在变压器的次级绕组中感应的直流电力,并切换到连接到 第二AC端子,串联连接到初级绕组的谐振电感器,以及用于控制由第一和第二开关电路执行的开关操作的控制单元。 控制单元通过控制由第二开关电路执行的开关操作来使第二AC端子短路。
    • 6. 发明申请
    • LED DRIVER CIRCUIT AND LED LIGHTING DEVICE USING THE SAME
    • LED驱动电路和使用其的LED照明装置
    • US20120043902A1
    • 2012-02-23
    • US13198929
    • 2011-08-05
    • Atsushi KANAMORITakayuki SHIMIZUHirohisa WARITAHiroyuki SHOJI
    • Atsushi KANAMORITakayuki SHIMIZUHirohisa WARITAHiroyuki SHOJI
    • H05B37/02
    • H05B33/0815H02M1/4225H02M3/33523Y02B70/126
    • Provided is an LED driver circuit, to be connected to an AC power supply via a phase-control dimmer, for driving an LED load, including: a switching power supply part including a switching element and a switching current detection part; an LED current detection part; a first control part for controlling and switching the switching element so that a switching current has a desired current value based on a detection signal of the switching current detection part; a second control part for controlling and switching the switching element so that an LED current has a desired current value based on a detection signal of the LED current detection part; and a switch part for switching between control performed by the first control part when the phase-control dimmer is set to high brightness dimming and control performed by the second control part when the phase-control dimmer is set to low brightness dimming.
    • 提供一种LED驱动电路,其经由相位控制调光器连接到AC电源,用于驱动LED负载,包括:开关电源部分,包括开关元件和开关电流检测部分; LED电流检测部分; 第一控制部分,用于基于开关电流检测部分的检测信号来控制和切换开关元件,使得开关电流具有期望的电流值; 第二控制部分,用于基于LED电流检测部分的检测信号来控制和切换开关元件,使得LED电流具有期望的电流值; 以及开关部,用于当相位控制调光器被设置为当相位控制调光器被设置为低亮度调光时由第二控制部分执行的高亮度调光和控制时,切换由第一控制部执行的控制。