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公开(公告)号：US4602323A
公开(公告)日：1986-07-22
申请号：US667965
申请日：1984-11-05
CPC分类号： H02M3/338
摘要： A single-ended transformer drive circuit includes a transformer having a primary winding and a secondary winding and a switching transistor connected to the primary winding of the transformer and adapted to turn on and drive the transformer in the forward direction along its hysteresis curve, whereby an output voltage is generated in the secondary circuit of the transformer. An auxiliary transistor circuit is coupled to the transformer for driving it in the reverse direction along its hysteresis curve when the switching transistor turns off, whereby the transformer is reset and prepared for the next cycle of operation when the switching transistor turns on again.
摘要翻译： 单端变压器驱动电路包括具有初级绕组和次级绕组的变压器和连接到变压器的初级绕组的开关晶体管，并且适于沿着其滞后曲线在正向上导通和驱动变压器，由此， 在变压器的次级电路中产生输出电压。 辅助晶体管电路耦合到变压器，当开关晶体管截止时，沿着其滞后曲线在相反方向上驱动它，由此当开关晶体管再次接通时，变压器被复位并准备用于下一个工作周期。
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公开(公告)号：US4595974A
公开(公告)日：1986-06-17
申请号：US649071
申请日：1984-09-10
CPC分类号： H02M3/3385
摘要： A circuit for controlling the base drive of switching transistor in a power supply wherein the switching transistor is coupled to the primary winding of a transformer linking the primary and secondary circuits of the power supply. Optimum operation of the switching transistor implies a desired level of saturation thereof. Base drive for the switching transistor is provided by a second conducting transistor. An excess of current flowing in the switching transistor is sensed, thereby effecting a reduction in the current flow in the second transistor. The latter condition causes a diminution in the base drive of the switching transistor and a return to its desired level of saturation.
摘要翻译： 一种用于控制电源中的开关晶体管的基极驱动的电路，其中开关晶体管耦合到连接电源的一次电路和次级电路的变压器的初级绕组。 开关晶体管的最佳操作意味着期望的饱和程度。 用于开关晶体管的基极驱动由第二导电晶体管提供。 检测到在开关晶体管中流过的电流的过量，从而降低了第二晶体管中的电流。 后一种情况导致开关晶体管的基极驱动减小并恢复到其期望的饱和水平。
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13.发明授权公开(公告)号：US08242704B2
公开(公告)日：2012-08-14
申请号：US12207353
申请日：2008-09-09
CPC分类号： H05B33/089 , H05B33/0806 , H05B33/0809 , H05B33/0815 , H05B33/083 , H05B33/0845 , H05B37/0227
摘要： An apparatus, method and system are disclosed for supplying power to a load such as a plurality of light emitting diodes. A representative apparatus comprises a primary module, a first secondary module couplable to a first load, and a second secondary module couplable to a second load. The primary module comprises a transformer having a transformer primary. The first secondary module comprises a first transformer secondary magnetically coupled to the transformer primary, and the second secondary module comprises a second transformer secondary magnetically coupled to the transformer primary, with the second secondary module couplable in series through the first or second load to the first secondary module.
摘要翻译： 公开了一种用于向诸如多个发光二极管的负载供电的装置，方法和系统。 代表性装置包括主模块，可耦合到第一负载的第一辅助模块和可耦合到第二负载的第二辅助模块。 主模块包括具有变压器初级的变压器。 第一次级模块包括磁耦合到变压器初级的第一变压器，并且第二次级模块包括磁耦合到变压器初级的第二变压器次级，其中第二次级模块可通过第一或第二负载串联连接到第一变压器 二级模块
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公开(公告)号：US07319232B1
公开(公告)日：2008-01-15
申请号：US11146667
申请日：2005-06-06
申请人： Robert Bell , Brad Benson , Patrice R. Lethellier
发明人： Robert Bell , Brad Benson , Patrice R. Lethellier
IPC分类号： G02B27/00
CPC分类号： H04B10/6911
摘要： An opto-coupler interface is provided. The opto-coupler interface includes a current mirror and a resistor. The opto-coupler interface is arranged such that a relatively fixed voltage is provided across the photodetector. At one end of the photodetector, the voltage is relatively fixed because the photodetector is coupled to the input of a current mirror. Because the voltage across the opto-coupler is relative fixed, the opto-coupler interface is a current interface rather than a voltage interface. Current from the photodetector is mirrored by the current mirror to provide an output mirror current. The output mirror current is provided to a resistor such that the resistor provides a voltage that is based on the output mirror current.
摘要翻译： 提供光耦合器接口。 光耦合器接口包括电流镜和电阻。 光耦合器接口被布置成使得在光电检测器两端提供相对固定的电压。 在光电检测器的一端，电压相对固定，因为光电检测器耦合到电流镜的输入端。 因为光耦合器两端的电压是相对固定的，所以光耦合器接口是电流接口而不是电压接口。 来自光电检测器的电流由电流镜反射以提供输出镜电流。 输出镜电流被提供给电阻器，使得电阻器提供基于输出镜电流的电压。
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公开(公告)号：US6094038A
公开(公告)日：2000-07-25
申请号：US340575
申请日：1999-06-28
CPC分类号： H02M3/1588 , Y02B70/1466
摘要： A DC--DC power converter circuit for converting relatively high input voltages to relatively low output voltages employs a buck-type circuit topology with a multiple winding inductor. An optional winding is provided to the inductor to clamp a voltage spike appearing on the drain of one of the switching devices. Optionally, two inductor windings may be capacitively coupled for better efficiency.
摘要翻译： 用于将相对高的输入电压转换为相对低的输出电压的DC-DC功率转换器电路采用具有多绕组电感器的降压型电路拓扑。 将一个可选的绕组提供给电感器以钳位出现在一个开关装置的漏极上的电压尖峰。 可选地，两个电感器绕组可以电容耦合以获得更好的效率。
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公开(公告)号：US4654538A
公开(公告)日：1987-03-31
申请号：US667953
申请日：1984-11-05
CPC分类号： H02M1/10 , Y10T307/675 , Y10T307/858
摘要： A power supply circuit including A.C. input of either 110 volts or 220 volts coupled to a full diode bridge, across the output of which are provided series connected capacitors across which the desired system operating voltage appears. A voltage-controlled current generator for driving a diac and triac is connected between the input supply and the bridge capacitors. At 110 volt input, the current generator closes the triac and the circuitry operates as a voltage doubler to provide the desired system voltage. At 220 volt input, the triac remains open, and the full bridge and capacitors provide the same desired system voltage.
摘要翻译： 包括耦合到全二极管电桥的110伏特或220伏特的交流输入的电源电路跨越其输出端提供串联连接的电容器，出现期望的系统工作电压。 用于驱动双向可控硅和三端双向可控硅开关元件的压控电流发生器连接在输入电源和桥式电容器之间。 在110伏输入时，电流发生器关闭三端双向可控硅开关元件，电路作为倍压器工作，以提供所需的系统电压。 在220伏输入时，三端双向可控硅开关保持断开，全桥和电容器提供相同的所需系统电压。
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