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公开(公告)号：US06025999A
公开(公告)日：2000-02-15
申请号：US190953
申请日：1998-11-12
CPC分类号： H02M7/4807 , H02M3/33561 , H02M2001/007 , H02M2001/009
摘要： A power supply and a method of operating the same. In one embodiment, the power supply includes: (1) a DC-DC converter having an isolation transformer that conveys an alternating voltage of about a first frequency between a primary winding and at least one secondary winding thereof and (2) a four-quadrant inverter, coupled to one of the at least secondary winding, that converts a portion of the alternating voltage into a waveform having about a second frequency that is less than the first frequency, including: (2a) a bi-directional switch, coupled between an input and an output of the four-quadrant inverter and (2b) a controller, coupled to the switch, that activates the switch to couple the input to the output during a portion of a switching cycle of the alternating voltage to change voltages in the waveform.
摘要翻译： 电源及其操作方法。 在一个实施例中，电源包括：（1）具有隔离变压器的DC-DC转换器，其在初级绕组和至少一个次级绕组之间传送大约第一频率的交流电压，以及（2）四象限 逆变器，耦合到所述至少次级绕组中的一个，其将所述交流电压的一部分转换成具有小于所述第一频率的约第二频率的波形，所述第二频率包括：（2a）双向开关， 输入和四象限逆变器的输出，以及（2b）耦合到开关的控制器，其在交流电压的开关周期的一部分期间激活开关以将输入耦合到输出，以改变波形中的电压 。
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2.发明授权
公开(公告)号：US6038147A
公开(公告)日：2000-03-14
申请号：US191441
申请日：1998-11-12
CPC分类号： H02M7/4807 , H02M3/33561
摘要： A power supply and method of operation thereof. In one embodiment, the power supply includes: (1) a primary side power switch, (2) an isolation transformer having a primary winding coupled to the primary side power switch, the primary side power switch conducting intermittently to transfer current from an input of the power supply to the isolation transformer, (3) a secondary side power switch, coupled to a secondary winding of the isolation transformer, that is operable to conduct within a conduction period of the primary side power switch to transfer current from the isolation transformer to an output of the power supply, a portion of the current being contained within the power supply during a nonconduction period of the secondary side power switch and (4) a capacitor, coupled to the secondary side power switch, that, circulates the portion toward the output during the nonconduction period.
摘要翻译： 电源及其操作方法。 在一个实施例中，电源包括：（1）初级侧电源开关，（2）隔离变压器，其具有耦合到初级侧电源开关的初级绕组，所述初级侧电源开关间断地传导电流从 隔离变压器的电源，（3）耦合到隔离变压器的次级绕组的次级侧电源开关，其可操作以在初级侧电源开关的导通时段内传导，以将电流从隔离变压器传输到 电源的输出，在次级侧电源开关的非导通期间，电流的一部分被包含在电源内;以及（4）耦合到次级侧电源开关的电容器，其将该部分朝向 产量在非传导期。
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公开(公告)号：US5457379A
公开(公告)日：1995-10-10
申请号：US137682
申请日：1993-10-15
摘要： A switching boost regulator, including auxiliary circuitry having an auxiliary switch and inductor connected to operate the regulator in a zero-voltage transition mode, achieves substantial efficiency improvement by limiting losses in the auxiliary circuitry dedicated to achieving zero-voltage transition operation. Loss reduction circuitry included with the auxiliary circuitry cooperatively operates to limit turn-on and conduction losses and to suppress ringing of the components of the auxiliary circuit.
摘要翻译： 开关升压调节器包括具有辅助开关和电感器的辅助电路，其连接以在零电压转换模式下操作调节器，通过限制专用于实现零电压转换操作的辅助电路中的损耗来实现显着的效率提高。 辅助电路所包括的减少损耗电路协同工作，以限制导通和导通损耗，并抑制辅助电路的组件振铃。
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4.发明授权公开(公告)号：US06198177B1
公开(公告)日：2001-03-06
申请号：US09479514
申请日：2000-01-07
IPC分类号： H02J700
CPC分类号： H02M3/33584 , H02J9/062 , H02M2001/009 , Y10T307/615 , Y10T307/625
摘要： A power supply that provides a source of backup AC voltage and a method of operating thereof. In one embodiment, the power supply includes a transformer having main power and backup power windings and a secondary winding. The power supply also includes multiple stages, namely, (1) a primary power stage coupled to the main power winding, (2) a backup power stage coupled to the backup power winding and having a backup battery, one of the primary and backup power stages acting as a current fed source and (3) an AC power stage, coupled to the secondary winding, that provides a source of AC voltage. The power supply is operable in a normal mode of operation in which the primary power stage supplies power to the secondary winding and further supplies power to the backup power winding to allow the backup power stage to charge the backup battery. The power supply is also operable in a backup mode of operation in which the backup power stage transfers power from the backup battery to the secondary winding via the backup power winding.
摘要翻译： 提供备用交流电压源的电源及其操作方法。 在一个实施例中，电源包括具有主电源和备用电源绕组的变压器和次级绕组。 电源还包括多级，即（1）耦合到主电源绕组的主功率级，（2）备用功率级，耦合到备用电源绕组并具有备用电池，主电源和备用电源之一 作为电流馈电源的级和（3）耦合到次级绕组的AC功率级，其提供AC电压源。 电源可在正常操作模式中操作，其中主功率级向次级绕组提供电力，并且进一步向备用功率绕组供电以允许备用功率级对备用电池充电。 电源还可在备用工作模式下工作，其中备用电源级通过备用电源绕组将备用电池的电力传送到次级绕组。
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5.发明授权Switching controller for a buck+boost converter and method of operation thereof 失效降压+升压转换器的开关控制器及其操作方法
公开(公告)号：US6037755A
公开(公告)日：2000-03-14
申请号：US111010
申请日：1998-07-07
CPC分类号： H02M3/1582 , G05F1/62
摘要： For use in a buck+boost DC/DC power converter having first and second switches, a switching controller, a method of controlling the first and second switches and buck+boost DC/DC power converters employing the switching controller or the method. In one embodiment, the switching controller includes: (1) a regulation circuit that provides a drive signal and (2) a drive signal generator, coupled to the regulation circuit, that generates a pulse of fixed duration based on the drive signal and provides the pulse and the drive signal to the first and second switches. In another embodiment, the switching controller further includes a comparison circuit that compares an input voltage with an output voltage and generates a control signal based thereon to a drive signal generator that routes a pulse and a drive signal to the first and second switches.
摘要翻译： 用于具有第一和第二开关的降压+升压DC / DC电力转换器，开关控制器，采用开关控制器或方法控制第一和第二开关和降压+升压DC / DC电力转换器的方法。 在一个实施例中，切换控制器包括：（1）提供驱动信号的调节电路和（2）耦合到调节电路的驱动信号发生器，其基于驱动信号产生固定持续时间的脉冲，并且提供 脉冲和驱动信号到第一和第二开关。 在另一实施例中，切换控制器还包括比较电路，其将输入电压与输出电压进行比较，并且基于驱动信号发生器产生控制信号，所述驱动信号发生器将脉冲和驱动信号传送到第一和第二开关。
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公开(公告)号：US6038145A
公开(公告)日：2000-03-14
申请号：US167479
申请日：1998-10-06
IPC分类号： H03K17/16 , H03K17/691 , H02M3/335
CPC分类号： H03K17/168 , H03K17/162 , H03K17/691
摘要： A controller for a power switch having an isolated control terminal and coupled to a secondary winding of a drive transformer and a method of preventing spurious turn-on of the power switch. The controller includes: (1) a controllable switch, coupled between the secondary winding and the power switch, that alters a control voltage of the power switch in response to a characteristic of the secondary winding, and (2) a bias circuit coupled to the controllable switch and the power switch that provides a voltage differential between the controllable switch and the power switch to prevent spurious turn-on thereof.
摘要翻译： 一种用于具有隔离控制端并耦合到驱动变压器的次级绕组的电源开关的控制器，以及防止电源开关的虚假接通的方法。 控制器包括：（1）耦合在次级绕组和功率开关之间的可控开关，其响应于次级绕组的特性改变功率开关的控制电压，以及（2）耦合到 可控开关和电源开关，其在可控开关和电源开关之间提供电压差，以防止其虚假接通。
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7.发明授权Asymmetrical half-bridge power converter having reduced input ripple and method of manufacturing the same 失效具有减小的输入纹波的非对称半桥功率转换器及其制造方法公开(公告)号：US06188586B1
公开(公告)日：2001-02-13
申请号：US09553824
申请日：2000-04-21
IPC分类号： H02M3335
摘要： An asymmetrical half-bridge power converter and a method of manufacturing the same. In one embodiment, the asymmetrical half-bridge power converter includes: (1) first and second power switches configured to be controlled by complementary drive signals having nominal first and second duty cycles of D and 1-D, respectively and (2) first and second capacitors, having intrinsic capacitance values proportional to 1-D and D, respectively, and intrinsic equivalent series resistance (ESR) values proportional to D and 1-D, respectively, configured to reduce input ripple current associated with the asymmetrical half-bridge power converter.
摘要翻译： 不对称半桥功率转换器及其制造方法。 在一个实施例中，非对称半桥功率转换器包括：（1）第一和第二功率开关，其被配置为由分别具有D和1-D的标称第一和第二占空比的互补驱动信号控制，以及（2）第一和 分别具有与1-D和D成比例的固有电容值的第二电容器和分别与D和1-D成比例的本征等效串联电阻（ESR）值，其被配置为减少与不对称半桥功率相关联的输入纹波电流 转换器。
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8.发明授权Multiple output flyback converter having improved cross-regulation and method of operation thereof 失效具有改进的交叉调节的多输出反激转换器及其操作方法
公开(公告)号：US6078509A
公开(公告)日：2000-06-20
申请号：US193081
申请日：1998-11-16
CPC分类号： H02M3/33561
摘要： For use with a flyback converter having a modulator for providing a main switch control signal thereto and main and cross-regulated output circuits, the cross-regulated output circuit subject to ringing and resulting voltage excursion, a voltage excursion controller and a method of operating the same. In one embodiment, the controller includes: (1) a delay circuit, coupled to the modulator, that generates a delay signal based on the main switch control signal and (2) an auxiliary switch, associated with the cross-regulated output circuit, that receives the delay signal and opens to isolate at least a portion of the ringing within said cross-regulated output circuit.
摘要翻译： 为了与具有用于提供主开关控制信号的调制器和主交叉输出电路的反激式转换器一起使用，交叉调节输出电路经受振铃和由此产生的电压偏移，电压偏移控制器和操作方法 相同。 在一个实施例中，控制器包括：（1）耦合到调制器的延迟电路，其产生基于主开关控制信号的延迟信号和（2）与交叉调节输出电路相关联的辅助开关， 接收延迟信号并打开以隔离所述交叉调节输出电路内的振铃的至少一部分。
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公开(公告)号：US5822199A
公开(公告)日：1998-10-13
申请号：US769285
申请日：1996-12-18
IPC分类号： H03K17/16 , H03K17/691 , H02M3/335
CPC分类号： H03K17/168 , H03K17/162 , H03K17/691
摘要： A controller for a power switch having an isolated control terminal and coupled to a secondary winding of a drive transformer and a method of preventing spurious turn-on of the power switch. The controller includes: (1) a controllable switch, coupled between the secondary winding and the power switch, that alters a control voltage of the power switch in response to a characteristic of the secondary winding, and (2) a bias circuit coupled to the controllable switch and the power switch that provides a voltage differential between the controllable switch and the power switch to prevent spurious turn-on thereof.
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10.发明授权Apparatus and method for generting negative bias for isolated MOSFET gate-drive circuits 失效用于产生隔离MOSFET栅极驱动电路的负偏置的装置和方法
公开(公告)号：US5481219A
公开(公告)日：1996-01-02
申请号：US278474
申请日：1994-07-20
IPC分类号： H03K17/687 , H03K17/0412 , H03K17/691 , H03K17/04 , H03K17/16
CPC分类号： H03K17/691 , H03K17/04123 , H03K2017/066
摘要： An isolated MOSFET gate drive includes circuitry to provide a negative gate bias during the off time of the MOSFET to enhance its immunity to inadvertent turn-on. The bias is generated by a self contained two terminal passive network which may be "floated" at any potential with respect to ground. This bias is automatically generated through the action of the network to the gate drive waveform, eliminating the need for an external bias supply to provide this voltage. The bias supply is located locally, thus eliminating the need for long interconnects which may interfere with circuit operation. The bias network in one implementation is a combination of a capacitor and non-linear semiconductor device with a fixed voltage breakdown characteristic. This two-component implementation maintains the capability of producing systems with high packaging densities.
摘要翻译： 隔离MOSFET栅极驱动器包括在MOSFET的关断时间期间提供负栅极偏置的电路，以增强其对无意开启的抗扰性。 偏置由自包含的两个终端无源网络产生，该无源网络可能相对于地面“浮动”为任何潜力。 该偏置通过网络对栅极驱动波形的动作自动生成，从而无需外部偏置电源来提供该电压。 偏置电源位于本地，因此不需要可能干扰电路操作的长互连。 一种实现中的偏置网络是具有固定电压击穿特性的电容器和非线性半导体器件的组合。 这种双组分实施保持了生产具有高包装密度的系统的能力。
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