公开(公告)号：US5543632A

公开(公告)日：1996-08-06

申请号：US782833

申请日：1991-10-24

申请人： Donald J. Ashley

发明人： Donald J. Ashley

IPC分类号： H01L23/58 ,  H01L21/822 ,  H01L27/02 ,  H01L27/04 ,  H03K17/08 ,  H03K17/14 ,  H03K17/695

CPC分类号： H03K17/145 ,  H01L27/0248 ,  H01L2924/0002

摘要： A load transistor is integrated into a region of a semiconductor layer. The load transistor has an on-resistance which passes the load current. One or more drain pilot transistors are also integrated into the same region of the semiconductor layer such that the load transistor substantially surrounds the pilot transistor(s). Consequently, as the load transistor heats-up due to the load current, the heat from the load transistor conducts to the pilot transistor(s) and heats the pilot transistor(s) to substantially the same temperature as the load transistor. If more than one drain pilot transistor are provided, then they are located adjacent to each other to ensure that all the pilot transistors exhibit substantially the same temperature as each other. The pilot transistor(s) are scaled models of the load transistor such that an on-resistance of each of the pilot transistors varies proportionally to the on-resistance of the load transistor with temperature. Current sources supply fixed currents to the on-resistances of the respective pilot transistors. Consequently, voltage(s) developed across the pilot transistor(s) are accurate references with which to set a drive voltage for the load current or an overcurrent or undercurrent detector, which reference voltages are temperature compensated.

摘要翻译： 负载晶体管被集成到半导体层的区域中。 负载晶体管具有通过负载电流的导通电阻。 一个或多个漏极引导晶体管也被集成到半导体层的相同区域中，使得负载晶体管基本上围绕导引晶体管。 因此，当负载晶体管由于负载电流而加热时，来自负载晶体管的热量传导到引导晶体管，并将导引晶体管加热到与负载晶体管基本相同的温度。 如果提供多于一个的漏极引导晶体管，则它们彼此相邻地定位，以确保所有的导频晶体管显示出彼此基本上相同的温度。 引导晶体管是负载晶体管的缩放模型，使得每个引导晶体管的导通电阻与负载晶体管的导通电阻随温度成比例地变化。 电流源为相应导频晶体管的导通电阻提供固定电流。 因此，引导晶体管两端产生的电压是准确的参考值，用于设置负载电流的驱动电压或过电流或欠电流检测器，哪些参考电压是温度补偿的。

公开(公告)号：US5245261A

公开(公告)日：1993-09-14

申请号：US782211

申请日：1991-10-24

申请人： Donald J. Ashley ,  Mark K. DeMoor

发明人： Donald J. Ashley ,  Mark K. DeMoor

IPC分类号： H01L27/02 ,  H01L29/10

CPC分类号： H01L27/0248 ,  H01L29/1075 ,  H01L2924/0002

摘要： A temperature compensated overcurrent and/or undercurrent detector monitors current through a solenoid or other load and signals when the load current exceeds an upper limit or falls below a lower limit. Such a signal may indicate a failure of another circuit which supplies the load current via a load transistor. This other circuit which supplies the load current is temperature compensated, and likewise the detector is temperature compensated so it can be set to signal an overcurrent or undercurrent condition when the load current varies a small amount from a predetermined range. The load transistor has an on-resistance which passes the load current and varies with temperature. The temperature compensation for the detector is provided in part by two pilot transistors which are integrated with the load transistor such that as the load transistor heats-up due to the load current passing through the on-resistance, the pilot transistors heat-up due to heat conduction from the load transistor. Each pilot transistor also has an on-resistance which varies proportionally or similarly to the on-resistance of the load transistor. A current source is coupled to the on-resistance of each pilot transistor to generate reference voltages above and below the acceptable range of voltages sensed by the sensor representing an acceptable range of load currents.

摘要翻译： 温度补偿过电流和/或欠电流检测器通过电磁线圈或其他负载监测电流，并在负载电流超过上限或下降到低于下限时发出​​信号。 这样的信号可以指示通过负载晶体管提供负载电流的另一电路的故障。 提供负载电流的另一个电路是温度补偿的，同样，检测器进行温度补偿，因此当负载电流从预定范围变化很​​小时，可以将其设置为发出过电流或欠电流状态。 负载晶体管具有通过负载电流并随温度变化的导通电阻。 检测器的温度补偿部分由与负载晶体管集成的两个导频晶体管部分提供，使得由于负载晶体管由于负载电流通过导通电阻而加热，导频晶体管由于 来自负载晶体管的热传导。 每个引导晶体管还具有与负载晶体管的导通电阻成比例地或类似地变化的导通电阻。 电流源耦合到每个导频晶体管的导通电阻，以产生高于和低于表示可接受的负载电流范围的由传感器感测的电压的可接受范围的参考电压。

公开(公告)号：US4803592A

公开(公告)日：1989-02-07

申请号：US146132

申请日：1988-01-19

申请人： Donald J. Ashley

发明人： Donald J. Ashley

IPC分类号： G05F1/569 ,  H02H3/04

CPC分类号： G05F1/569

摘要： A power supply system, which supplies a number of different A.C. and D.C. voltage levels to a plurality of loads, is monitored at a number of points for undervoltage, overvoltage and/or overcurrent fault conditions. A diagnostics logic circuit, which is formed from relatively inexpensive, readily available logic units, generates a BCD code signal indicating a fault in response to the occurrence of a fault condition at one of the monitored points. The system responds to this BCD fault indicating code signal by, on the one hand, protecting the power system by actuating a main relay to open the A.C. power line to the system and generating a shutdown signal applied to a pulse width modulator of a converter in the system and, on the other hand, by driving a seven-segment display which displays a numeral to indicate the location of the fault condition. In order to avoid false undervoltage fault signals while the system voltages are coming up after the system is turned on, a delay circuit is used to mask the BCD code generating portion of the diagnostics logic until the system voltages reach normal operating levels.

摘要翻译： 在欠压，过电压和/或过电流故障条件的多个点上监视向多个负载提供多个不同的交流和直流电压电平的供电系统。 由相对廉价的易于获得的逻辑单元形成的诊断逻辑电路产生一个BCD代码信号，该BCD代码信号指示在一个监视点处发生故障状况的故障。 一方面，该系统响应于该BCD故障指示代码信号，一方面通过致动主继电器来保护电力系统，以将系统的AC电力线打开并产生一个施加到转换器的脉宽调制器的关断信号 另一方面，通过驱动显示数字的七段显示器来指示故障状况的位置。 为了在系统接通之后系统电压升高时避免假电压故障信号，使用延迟电路来屏蔽诊断逻辑的BCD码产生部分，直到系统电压达到正常的操作电平。

公开(公告)号：US5376830A

公开(公告)日：1994-12-27

申请号：US124323

申请日：1993-09-17

申请人： Donald J. Ashley ,  Michael J. Johnson ,  David R. Thomas

发明人： Donald J. Ashley ,  Michael J. Johnson ,  David R. Thomas

IPC分类号： H02M3/156 ,  H03K5/12

CPC分类号： H02M3/156

摘要： A slope compensation circuit for use with current-programmed switching DC to DC converters is provided which allows operation of the switching converters in the 1-2 MHz range. The circuit avoids feedback of an output voltage which includes the effects of a partially discharged slope capacitor without adding unnecessary delay by using a switch to bypass the discharging slope capacitor and coupling an input stage of the slope compensation circuit to an output driver. A delay in feeding back the output of the slope compensation circuit is provided to assure that the bypassing switch has settled.

摘要翻译： 提供了一种用于电流编程开关DC-DC转换器的斜率补偿电路，允许开关转换器在1-2 MHz范围内工作。 该电路避免了包括部分放电的斜坡电容器的影响的输出电压的反馈，而不会通过使用开关绕过放电斜坡电容器并将斜坡补偿电路的输入级耦合到输出驱动器而增加不必要的延迟。 提供反馈斜坡补偿电路的输出的延迟，以确保旁路开关已经稳定。

公开(公告)号：US5237262A

公开(公告)日：1993-08-17

申请号：US782218

申请日：1991-10-24

申请人： Donald J. Ashley ,  Mark K. DeMoor ,  Paul W. Graf

发明人： Donald J. Ashley ,  Mark K. DeMoor ,  Paul W. Graf

IPC分类号： G05F1/567 ,  G05F1/573 ,  H01H47/32 ,  H01L27/02 ,  H02M3/156

CPC分类号： H02M3/156 ,  G05F1/567 ,  G05F1/573 ,  H01H47/325 ,  H01L27/0248 ,  H02M2003/1555 ,  Y10S323/907

摘要： A temperature compensated control circuit includes a load transistor which passes the load current and has an on-resistance which varies with temperature. To provide temperature compensation, first and second pilot transistors are integrated with the load transistor such that as the load transistor heats-up due to the load current passing through the on-resistance of the load transistor, the first and second pilot transistors heat-up due to heat conduction from the load transistor. Each of the pilot transistors has an on-resistance which varies proportionally or similarly to the on-resistance of the load transistor. A first current source supplies a first level of current to the on-resistance of the first pilot transistor to develop a first reference voltage, and a second current source supplies a second level of current to the on-resistance of the second pilot transistor to develop a second reference voltage. The range between the first and second reference voltages corresponds to an acceptable range of load current. A voltage corresponding to the load current is sensed across the load transistor, and the control circuit controls the load current to maintain the sensed voltage within the range.

摘要翻译： 温度补偿控制电路包括通过负载电流并具有随温度变化的导通电阻的负载晶体管。 为了提供温度补偿，第一和第二导频晶体管与负载晶体管集成，使得当负载晶体管由于负载电流通过负载晶体管的导通电阻而加热时，第一和第二导频晶体管加热 由于负载晶体管的热传导。 每个导频晶体管具有与负载晶体管的导通电阻成比例地或类似地变化的导通电阻。 第一电流源向第一导频晶体管的导通电阻提供第一电平以产生第一参考电压，并且第二电流源将第二电平电流提供给第二导频晶体管的导通电阻以产生 第二参考电压。 第一和第二参考电压之间的范围对应于负载电流的可接受范围。 在负载晶体管两端检测对应于负载电流的电压，并且控制电路控制负载电流以将感测的电压保持在该范围内。

公开(公告)号：US5563540A

公开(公告)日：1996-10-08

申请号：US124516

申请日：1993-09-17

申请人： Donald J. Ashley ,  Michael J. Johnson

发明人： Donald J. Ashley ,  Michael J. Johnson

IPC分类号： H03K17/16 ,  H03K17/687 ,  H03B1/00

CPC分类号： H03K17/162 ,  H03K17/6872

摘要： Two controlled current gate drives are provided for driving parallel P and N channel pass devices, so that the rise time of the voltage at one gate of the pass devices overlaps with the fall time of the other to reduce capacitive signal coupling of the signal applied to an FET gate to the FET source and drain. Low-level current sources drive the gates of the pass devices with opposite polarities. A current mirror is used to control the currents provided by the gate drives to control the tradeoff between switching speed and switching noise coupling.

摘要翻译： 提供两个受控电流栅极驱动器用于驱动并联P和N沟道通路器件，使得通过器件的一个栅极处的电压的上升时间与另一个栅极驱动器的下降时间重叠，以减少施加到 FET栅极连接到FET源极和漏极。 低电平电流源驱动具有相反极性的通过器件的栅极。 电流镜用于控制由栅极驱动器提供的电流，以控制开关速度和开关噪声耦合之间的权衡。

公开(公告)号：US5521809A

公开(公告)日：1996-05-28

申请号：US123274

申请日：1993-09-17

申请人： Donald J. Ashley ,  Leonard J. Hitchcock ,  Michael J. Johnson

发明人： Donald J. Ashley ,  Leonard J. Hitchcock ,  Michael J. Johnson

IPC分类号： H02J1/10 ,  H02M3/155

CPC分类号： H02J1/102 ,  H02J1/10 ,  H02J1/108 ,  Y10T307/707

摘要： A matched pair of npn transistor configured as emitter followers provide high impedance isolation for input error voltage busses in the current share circuitry used with parallel connected current programmed dc to dc converters. The matched emitter followers offer the bus isolation of buffer amplifiers but do not add the detrimental offset voltage to the input error signals. Trimmable current sinks are connected to the emitters of the transistors to guarantee equal VBE drops. Slight intentional unbalancing can be introduced using the current sources to improve stability. The current share circuitry equalizes main FET switching currents not load currents reducing FET stresses. A programmable differential amplifier is provided which can accommodate different regulator output voltages. Diagnostic circuitry monitors share circuitry operation.

摘要翻译： 配置为发射极跟随器的匹配的一对npn晶体管为与并联连接的电流编程的直流到直流转换器使用的电流共享电路中的输入误差电压总线提供高阻抗隔离。 匹配的发射极跟随器提供缓冲放大器的总线隔离，但不会对输入误差信号增加有害的失调电压。 可调电流吸收器连接到晶体管的发射极以保证相等的VBE下降。 可以使用当前的来源引入轻微的故意不平衡，以提高稳定性。 当前的共享电路使主FET开关电流不平衡负载电流，从而降低FET应力。 提供可编程差分放大器，可以适应不同的稳压器输出电压。 诊断电路监控共享电路操作。