-
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。
-
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.
-
3.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。
-
公开(公告)号：US5912810A
公开(公告)日：1999-06-15
申请号：US52451
申请日：1998-03-31
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.
-
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 。
-
6.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。
-
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。
-
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。
-
9.发明授权
公开(公告)号：US6055166A
公开(公告)日：2000-04-25
申请号：US193042
申请日：1998-11-16
CPC分类号： H02M1/36 , Y10S323/901
摘要： For use with a power converter having a power supply control circuit, a current startup bias circuit and a method of operating the same. In one embodiment, the circuit includes: (1) a charge reservoir that receives and stores a trickle current during a startup period of the power converter, a voltage of the charge reservoir increasing as the charge reservoir stores the trickle current and (2) a latch, coupled to the charge reservoir, that activates when the voltage reaches a threshold to couple the charge reservoir to the power supply control circuit and initiate operation thereof.
摘要翻译： 用于具有电源控制电路的电力转换器，电流启动偏置电路及其操作方法。 在一个实施例中，电路包括：（1）电荷储存器，其在功率转换器的启动期间接收和存储涓流电流，电荷储存器的电压随着电荷储存器存储涓流电流而增加;（2） 闩锁，耦合到电荷储存器，当电压达到阈值时激活，以将电荷储存器耦合到电源控制电路并启动其操作。
-
10.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。
-
-
-
-
-
-
-
-
-
搜索结果
55 条记录 (耗时 0.022 秒)