公开(公告)号：US4903182A

公开(公告)日：1990-02-20

申请号：US325751

申请日：1989-03-20

申请人： Raymond W. Pilukaitis ,  Khanh C. Tran ,  Thomas G. Wilson, Jr.

发明人： Raymond W. Pilukaitis ,  Khanh C. Tran ,  Thomas G. Wilson, Jr.

IPC分类号： H02M3/28 ,  H02M3/338 ,  H03K17/0412

CPC分类号： H03K17/04123 ,  H02M3/3385

摘要： A self oscillating converter with regenerative switching includes circuitry to enhance the gain of circuity to turn off a MOSFET power switch and enhance the regenerative action culminating in turn off in order to eliminate bursting at low loads. The MOSFET power switching device turn off circuitry includes the addition of a supplementary drive transistor operative for counteracting the effects of the parasitic capacitances of the MOSFET power switching device. This permits the converter to operate with the shorter on times and to provide a low ripple output at very low load.

公开(公告)号：US4504898A

公开(公告)日：1985-03-12

申请号：US501298

申请日：1983-06-06

申请人： Raymond W. Pilukaitis ,  Thomas G. Wilson, Jr.

发明人： Raymond W. Pilukaitis ,  Thomas G. Wilson, Jr.

IPC分类号： H02M1/00 ,  H02M1/36 ,  H02M3/335

CPC分类号： H02M1/36 ,  Y10S323/901

摘要： The start-up trajectory of the operating point of a DC-to-DC converter normally includes a high current locus which must be traversed to reach the steady-state operating point. In the case of a converter powered by a current-limited source, such as a power supply system where one converter powers a plurality of subsequent converters, the subsequent converters may be unable to turn on due to inadequate current drive. By using a control circuit adapted to control the start-up trajectory of a DC-to-DC converter as a continuous function of the input voltage applied to it by the current-limited source, the start-up characteristics are constrained to be compatible to both source and load permitting the converter to proceed to its steady-state operating point.

摘要翻译： DC-DC转换器的工作点的启动轨迹通常包括必须穿过的高电流轨迹才能达到稳态工作点。 在由限流源（例如其中一个转换器为多个后续转换器供电的电源系统）供电的转换器的情况下，随后的转换器可能由于电流驱动不足而不能接通。 通过使用适于控制DC-DC转换器的启动轨迹作为由限流源施加到其的输入电压的连续函数的控制电路，启动特性被限制为与 源和负载允许转换器进入其稳态工作点。

公开(公告)号：US06438007B1

公开(公告)日：2002-08-20

申请号：US09563977

申请日：2000-05-03

申请人： Raymond W. Pilukaitis ,  Carl M. Wildrick

发明人： Raymond W. Pilukaitis ,  Carl M. Wildrick

IPC分类号： H02M700

CPC分类号： H02M3/1584 ,  H02M3/285 ,  H02M7/08 ,  H02M2001/0009

摘要： A control circuit for, and method of, allowing the power supply, having a controller and an output current limit, to be operated in parallel with other power supplies and a power supply incorporating the circuit or the method. In one embodiment, the circuit includes: (1) a voltage sense subcircuit, coupled to an output of the power supply, that produces a voltage control signal that is a function of an output voltage of the power supply and a voltage proportional to an output current of the power supply and (2) a current sense subcircuit, coupled to the power supply, that produces a current sense signal that is a function of the output current of the power supply, a combination of the voltage control signal and current control signal employable to modify an output of the controller and thereby regulate said power supply and allow said power supply to continuously operate in a current limit region.

摘要翻译： 具有控制器和输出电流限制的允许电源的控制电路和方法能够与其他电源和包含电路或方法的电源并联操作。 在一个实施例中，电路包括：（1）耦合到电源的输出的电压检测子电路，其产生作为电源的输出电压和与输出成比例的电压的函数的电压控制信号 电源的电流和（2）耦合到电源的电流检测子电路，其产生作为电源的输出电流的函数的电流感测信号，电压控制信号和电流控制信号的组合 可用于修改控制器的输出，从而调节所述电源并允许所述电源在电流极限区域中连续工作。

公开(公告)号：US06264093B1

公开(公告)日：2001-07-24

申请号：US09184753

申请日：1998-11-02

申请人： Raymond W. Pilukaitis ,  Yi T. Shih ,  Thang D. Truong ,  William L. Woods

发明人： Raymond W. Pilukaitis ,  Yi T. Shih ,  Thang D. Truong ,  William L. Woods

IPC分类号： B23K3102

CPC分类号： H05K3/3463

摘要： The present invention provides a method for soldering components to a printed wiring board. In one embodiment, the method comprises applying a substantially lead-free solder to the printed wiring board, placing an electronic component having lead-free terminals on the solder, and heating the printed wiring board in a substantially oxygen-free atmosphere to a temperature sufficient to reflow the solder. In an alternative embodiment, the method may further comprise applying a tin-based solder. In a particularly advantageous embodiment, the method includes applying a solder alloy of tin and a metal selected from the group consisting of: silver, antimony, copper, and gold.

摘要翻译： 本发明提供一种将部件焊接到印刷电路板的方法。 在一个实施例中，该方法包括向印刷线路板施加基本上无铅的焊料，将具有无铅端子的电子部件放置在焊料上，并将印刷电路板在基本上无氧的气氛中加热至足够的温度 以回流焊料。 在替代实施例中，该方法还可以包括施加锡基焊料。 在一个特别有利的实施例中，该方法包括应用锡和选自银，锑，铜和金的金属的焊料合金。

公开(公告)号：US5926383A

公开(公告)日：1999-07-20

申请号：US45425

申请日：1998-03-20

申请人： Raymond W. Pilukaitis ,  Ning Sun

发明人： Raymond W. Pilukaitis ,  Ning Sun

IPC分类号： H02H7/12 ,  H02M1/00 ,  H02M1/32 ,  H02M7/10 ,  H02H7/00

CPC分类号： H02M1/32 ,  H02H7/1213

摘要： For use with a controller, couplable to a network of first and second comparators, that disables a power converter an actual output current thereof exceeds a threshold output current, an integrated protection circuit and method of operating the same. In one embodiment, the integrated protection circuit includes: (1) a sensor that senses an actual input voltage of the power converter and (2) an isolation circuit, coupled to the first comparator, that selectively decouples the first comparator from the controller, the second comparator causing the controller to disable the power converter when the actual input voltage falls below a threshold input voltage thereby allowing the protection circuit to provide both overcurrent and undervoltage protection.

摘要翻译： 为了与控制器一起使用，可耦合到第一和第二比较器的网络，其禁用功率转换器，其实际输出电流超过阈值输出电流，集成保护电路及其操作方法。 在一个实施例中，集成保护电路包括：（1）感测功率转换器的实际输入电压的传感器和（2）耦合到第一比较器的隔离电路，其选择性地将第一比较器与控制器分离， 第二比较器使得控制器在实际输入电压降到阈值输入电压以下时禁用功率转换器，由此允许保护电路提供过电流和欠压保护。