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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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公开(公告)号：US5635867A
公开(公告)日：1997-06-03
申请号：US278479
申请日：1994-07-20
申请人： Kenneth J. Timm
发明人： Kenneth J. Timm
IPC分类号： H03K17/687 , H03K17/00 , H03K17/691 , H03K19/017 , H03K19/0175 , H03K17/04
CPC分类号： H03K17/691 , H03K2217/0036
摘要： A high performance isolated gate drive circuit for driving MOSFET is disclosed which uses a MOSFET pull-down device, provides unusually low gate discharge impedance, exceptionally fast turn-off of the controlled switch and reduced power dissipation in the overall gate drive circuit. It also provides superior off-time noise immunity.
摘要翻译： 公开了用于驱动MOSFET的高性能隔离栅极驱动电路，其使用MOSFET下拉器件，提供非常低的栅极放电阻抗，异常快速地关断受控开关并降低总体栅极驱动电路中的功率消耗。 它还提供了优越的关机时间抗扰度。
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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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4.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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公开(公告)号：US5214370A
公开(公告)日：1993-05-25
申请号：US759357
申请日：1991-09-13
申请人： Charles E. Harm , Kenneth J. Timm
发明人： Charles E. Harm , Kenneth J. Timm
CPC分类号： H02J7/0091 , H02J7/008 , Y10S320/32
摘要： A battery charger control includes a thermal sensor attached to the battery being charged. If the temperature readings indicate a thermal runaway condition the charging current output is adjusted in accord with the temperature reading by means of voltage injeciton into an output sense lead of the charging circuitry as a means of achieving a control that prevents thermal runaway of the battery while still permitting continuous charging of the battery.
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公开(公告)号：US5929618A
公开(公告)日：1999-07-27
申请号：US90430
申请日：1998-06-04
CPC分类号： H02J1/102
摘要： For use in a distributed power system having first and second power processing modules, a power processing module for, and method of synchronizing an operation of the second power processing module with the first power processing module and a power converter employing the power processing module or the method. In one embodiment, the power processing module includes: (1) a synchronization input terminal adapted to receive a first control signal, (2) a free-running oscillator that generates a gate drive signal for controlling a switch of the power processing module, the gate drive signal having a frequency that is a free-running frequency of the power processing module, (3) a synchronization circuit, coupled to the synchronization input terminal and the free-running oscillator, that synchronizes the gate drive signal with the first control signal and (4) a frequency setting circuit, coupled to the synchronization input terminal and the free-running oscillator, that modifies an operation of the free-running oscillator.
摘要翻译： 对于具有第一和第二功率处理模块的分布式电力系统，功率处理模块和第二功率处理模块与第一功率处理模块的操作同步的方法和使用功率处理模块的功率转换器 方法。 在一个实施例中，功率处理模块包括：（1）适于接收第一控制信号的同步输入端，（2）产生用于控制功率处理模块的开关的栅极驱动信号的自由运行振荡器， 具有作为功率处理模块的自由运行频率的频率的栅极驱动信号，（3）耦合到同步输入端子和自由振荡器的同步电路，其将栅极驱动信号与第一控制信号同步 和（4）耦合到同步输入端和自由振荡器的频率设定电路，其修改自由振荡器的操作。
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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.
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公开(公告)号：US5051880A
公开(公告)日：1991-09-24
申请号：US459038
申请日：1989-12-29
申请人： Charles E. Harm , Kenneth J. Timm
发明人： Charles E. Harm , Kenneth J. Timm
CPC分类号： H02M3/337 , Y02B70/1433
摘要： Frequency variation in a resonant zero voltage switching (ZVS) power converter is combined with supplemental duty cycle modulation to obtain voltage regulation and to narrow the required frequency band needed for regulation of a given output load. These two regulation processes are applied simultaneously to the power switch control in order to accommodate a wider range of regulated load. Hence in the alternative, for a given load range a smaller frequency range is needed than would be the case if frequency variation alone is used.The regulation control circuit includes both a duty cycle modulator and a frequency modulator each being responsive to an error signal responsive to a differential between an output voltage of the converter and a reference voltage. Each individual modulator has its own transfer function; one transfer function being kHz/volt the other transfer function being % duty cycle/volt. The regulation control circuit output is a rectangular pulse type signal that contains both elements of frequency modulation and duty cycle modulation.
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