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公开(公告)号：US20120299483A1
公开(公告)日：2012-11-29
申请号：US13572499
申请日：2012-08-10
IPC分类号： H05B37/02
CPC分类号： H05B33/089 , H05B33/0806 , H05B33/0809 , H05B33/0815 , H05B33/083 , H05B33/0845 , H05B37/0227
摘要： An apparatus and computer readable storage medium are disclosed for supplying power to a load such as a plurality of light emitting diodes. A representative apparatus comprises a primary module, a first secondary module couplable to a first load, and a second secondary module couplable to a second load. The primary module comprises a transformer having a transformer primary. The first secondary module comprises a first transformer secondary magnetically coupled to the transformer primary, and the second secondary module comprises a second transformer secondary magnetically coupled to the transformer primary, with the second secondary module couplable through the first or second load to the first secondary module.
摘要翻译： 公开了一种用于向诸如多个发光二极管的负载供电的装置和计算机可读存储介质。 代表性装置包括主模块，可耦合到第一负载的第一辅助模块和可耦合到第二负载的第二辅助模块。 主模块包括具有变压器初级的变压器。 第一次级模块包括磁耦合到变压器初级的第一变压器，并且第二次级模块包括磁耦合到变压器初级的第二变压器次级，其中第二次级模块可通过第一或第二负载耦合到第一次级模块 。
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2.发明授权Offset peak current mode control circuit for multiple-phase power converter 失效用于多相电力变换器的失调峰值电流模式控制电路公开(公告)号：US06664774B2
公开(公告)日：2003-12-16
申请号：US10112010
申请日：2002-03-27
IPC分类号： G05F156
CPC分类号： H02J1/102 , H02M3/1584
摘要： An offset peak current mode control circuit is provided for use with a multiple-phase DC-to-DC voltage converter including a plurality of converter modules connected to a common load and having a common input voltage source, a current sensor coupled to a sensing resistor disposed in series between the common input voltage source and the load to derive a current sense signal corresponding to current passing through the sensing resistor, and a voltage error sensor coupled to the load to derive a voltage error signal corresponding to difference between an output voltage of the voltage converter and a reference voltage. When the DC-to-DC voltage converter is operated with a relatively low input voltage or a relatively high duty cycle resulting in an overlap of the current sense signal, the offset peak current mode control circuit utilizes information from the clean (i.e., non-overlapping) portion of the current sense signal, and then stretches the duty cycle applied to an associated voltage converter module so that it extends into the time of the overlapping portion of the current sense signal.
摘要翻译： 提供偏移峰值电流模式控制电路，用于与包括连接到公共负载并具有公共输入电压源的多个转换器模块的多相DC-DC电压转换器一起使用，电流传感器耦合到感测电阻器 串联布置在公共输入电压源和负载之间以导出与通过感测电阻器的电流相对应的电流感测信号;以及电压误差传感器，耦合到负载以导出对应于电压误差信号的电压误差信号，该电压误差信号对应于 电压转换器和参考电压。 当直流 - 直流电压转换器以相对较低的输入电压或相对较高的占空比运行导致电流感测信号的重叠时，偏移峰值电流模式控制电路利用来自干净（即， 重叠）部分，然后延伸施加到相关联的电压转换器模块的占空比，使其延伸到电流感测信号的重叠部分的时间。
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3.发明申请公开(公告)号：US20100060175A1
公开(公告)日：2010-03-11
申请号：US12207353
申请日：2008-09-09
IPC分类号： H05B37/00
CPC分类号： H05B33/089 , H05B33/0806 , H05B33/0809 , H05B33/0815 , H05B33/083 , H05B33/0845 , H05B37/0227
摘要： An apparatus, method and system are disclosed for supplying power to a load such as a plurality of light emitting diodes. An exemplary apparatus comprises a primary module, a first secondary module couplable to a first load, and a second secondary module couplable to a second load. The primary module comprises a transformer having a transformer primary. The first secondary module comprises a first transformer secondary magnetically coupled to the transformer primary, and the second secondary module comprises a second transformer secondary magnetically coupled to the transformer primary, with the second secondary module couplable in series through the first or second load to the first secondary module. When energized by a power source, the first secondary module has a first voltage polarity and is couplable in a series with the first load configured to have an opposing, second voltage polarity, which substantially offset each other to provide a comparatively low resultant voltage level.
摘要翻译： 公开了一种用于向诸如多个发光二极管的负载供电的装置，方法和系统。 示例性装置包括主模块，可耦合到第一负载的第一辅助模块和可耦合到第二负载的第二辅助模块。 主模块包括具有变压器初级的变压器。 第一次级模块包括磁耦合到变压器初级的第一变压器，并且第二次级模块包括磁耦合到变压器初级的第二变压器次级，其中第二次级模块可通过第一或第二负载串联连接到第一变压器 二级模块 当由电源通电时，第一次级模块具有第一电压极性，并且可与第一负载串联耦合，该第一负载被配置为具有相对的第二电压极性，其基本上彼此抵消以提供相对较低的合成电压电平。
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4.发明授权公开(公告)号：US06424129B1
公开(公告)日：2002-07-23
申请号：US09935286
申请日：2001-08-21
IPC分类号： G05F140
CPC分类号： H02M3/1584 , H02M3/1588 , H02M2001/0009 , Y02B70/1466
摘要： An apparatus and method for accurately sensing the output current delivered to a load by a buck-type DC-to-DC switched mode power converter corrects for thermal variation of the output inductor. A first current sense signal provides a fast indication of output current of the DC-to-DC converter that is susceptible to thermal variation of the output inductor of the converter, and a second current sense signal provides a slow but accurate indication of output current that is not affected by said thermal variation. The first current sense signal is corrected using the second current sense signal to yield accurate output current sensing information. In an embodiment of the invention, an output current sensing apparatus is provided for use in a multi-phase DC-to-DC voltage converter comprising a plurality of converter modules connected to a common load and having a common input voltage source. A first current sensor is adapted to be coupled to an output inductor of at least one of the plurality of converter modules to derive a first current sense signal corresponding to current passing through an internal DC resistance of the output inductor. A second current sensor is adapted to be coupled to a sensing resistor disposed in series between the common input voltage source and the load to derive a second current sense signal corresponding to current passing through the sensing resistor. A current sense circuit receives the first and second current sense signals. The current sense circuit filters the second current sense signal, integrates a difference between the first current sense signal and the filtered second current sense signal, and adjusts attenuation of the first current sense signal based on the integrated difference. The current sense circuit thereby provides the first current sense signal as a slope signal for controlling a conduction duty cycle of the DC-to-DC converter and a DC level signal corresponding to a thermal drift error of the slope signal.
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公开(公告)号：US08742679B2
公开(公告)日：2014-06-03
申请号：US13572499
申请日：2012-08-10
CPC分类号： H05B33/089 , H05B33/0806 , H05B33/0809 , H05B33/0815 , H05B33/083 , H05B33/0845 , H05B37/0227
摘要： An apparatus and computer readable storage medium are disclosed for supplying power to a load such as a plurality of light emitting diodes. A representative apparatus comprises a primary module, a first secondary module couplable to a first load, and a second secondary module couplable to a second load. The primary module comprises a transformer having a transformer primary. The first secondary module comprises a first transformer secondary magnetically coupled to the transformer primary, and the second secondary module comprises a second transformer secondary magnetically coupled to the transformer primary, with the second secondary module couplable through the first or second load to the first secondary module.
摘要翻译： 公开了一种用于向诸如多个发光二极管的负载供电的装置和计算机可读存储介质。 代表性装置包括主模块，可耦合到第一负载的第一辅助模块和可耦合到第二负载的第二辅助模块。 主模块包括具有变压器初级的变压器。 第一次级模块包括磁耦合到变压器初级的第一变压器，并且第二次级模块包括磁耦合到变压器初级的第二变压器次级，其中第二次级模块可通过第一或第二负载耦合到第一次级模块 。
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6.发明授权Method and apparatus for sensing output inductor current in a DC-to-DC power converter 有权用于感测DC-DC电源转换器中的输出电感电流的方法和装置公开(公告)号：US06441597B1
公开(公告)日：2002-08-27
申请号：US10001722
申请日：2001-10-31
IPC分类号： G05F140
CPC分类号： H02M3/158 , H02M2001/0009
摘要： A current sense circuit for a DC-to-DC power converter accurately senses the output inductor current without adversely affecting efficiency of the power converter. The current sense circuit produces a current sense signal having amplitude sufficiently above the noise floor so that accurate load control of the power converter is achieved. Specifically, the DC-to-DC power converter includes at least one power switch connected to an input voltage source. At least one phase sensing switch is connected to the input voltage source in parallel with the at least one power switch. A pulse width modulation circuit provides common control pulses for the at least one power switch and the at least one phase sensing switch responsive to a current sense signal. An output inductor is connected to the at least one power switch and to a load. A current sensor is coupled to the output inductor and providing the current sense signal to the pulse width modulation circuit corresponding to current passing through an internal DC resistance of the output inductor. The current sensor further includes a filter that includes an on-state resistance of the at least one power switch. The current sensor further includes a second filter adapted to remove noise from the current sense signal when the at least one phase sensing switch and the at least one power switch change state.
摘要翻译： 用于DC-DC电源转换器的电流检测电路精确地感测输出电感器电流，而不会不利地影响功率转换器的效率。 电流感测电路产生具有足够高于本底噪声的振幅的电流感测信号，从而实现功率转换器的精确负载控制。 具体地，DC-DC电力转换器包括连接到输入电压源的至少一个电源开关。 至少一个相位感测开关与至少一个电源开关并联连接到输入电压源。 脉冲宽度调制电路为所述至少一个功率开关和所述至少一个相位感测开关提供响应于电流感测信号的公共控制脉冲。 输出电感器连接到至少一个电源开关和负载。 电流传感器耦合到输出电感器，并且将电流感测信号提供给脉冲宽度调制电路，该电流检测信号对应于通过输出电感器的内部直流电阻的电流。 电流传感器还包括包括至少一个电源开关的通态电阻的滤波器。 电流传感器还包括第二滤波器，其适于在至少一个相位感测开关和至少一个电源开关改变状态时从电流感测信号中去除噪声。
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公开(公告)号：US6144565A
公开(公告)日：2000-11-07
申请号：US357672
申请日：1999-07-20
CPC分类号： H02M3/155 , H02M3/158 , H02M2003/1557 , H02M3/005
摘要： A switched mode DC-DC power converter of the flyback type includes a primary circuit and a secondary circuit capacitively coupled to one another. In a first aspect the primary includes circuitry for achieving a 2:1 current transfer gain over the input, in a second aspect the secondary includes circuitry for achieving a 2:1 current transfer gain over an input. Combined, a 4:1 current transfer gain may be realized.
摘要翻译： 反激式的开关模式DC-DC功率转换器包括彼此电容耦合的初级电路和次级电路。 在第一方面，主要包括用于在输入端上实现2:1电流传输增益的电路，在第二方面，次级包括用于在输入端上实现2:1电流传输增益的电路。 组合时，可实现4：1的电流传输增益。
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8.发明授权Power converter having improved step down response for low duty cycle operation 失效功率转换器在低占空比操作中具有改进的降压响应公开(公告)号：US06703812B1
公开(公告)日：2004-03-09
申请号：US10370412
申请日：2003-02-18
IPC分类号： G05F110
CPC分类号： H02M3/1584
摘要： A power converter comprises at least one output inductor having an input and output terminal. At least one first switch circuit is connected to the input terminal of the output inductor to alternately connect the input terminal to at least one voltage source and to ground. A ripple control circuit is coupled to the output terminal and is adapted to clamp output current of the output inductor to an allowable maximum level in response to an output current overshoot condition produced by a step down in load coupled to the output terminal. The ripple control circuit further comprises an inductor conducting the output current to ground upon the output current overshoot condition.
摘要翻译： 功率转换器包括具有输入和输出端的至少一个输出电感器。 至少一个第一开关电路连接到输出电感器的输入端，以将输入端交替地连接到至少一个电压源并接地。 纹波控制电路耦合到输出端子，并且适于将输出电感器的输出电流钳位到允许的最大电平，以响应于耦合到输出端子的负载中的降压产生的输出电流过冲条件。 纹波控制电路还包括在输出电流过冲条件下将输出电流传导到地的电感器。
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公开(公告)号：US06625045B1
公开(公告)日：2003-09-23
申请号：US10034347
申请日：2001-12-28
IPC分类号： H02M324
CPC分类号： H02J1/102
摘要： A power module for a power system adapted to employ a star link topography. The power module includes a star section having an internal clock connection and a star link connection. The power system includes a plurality of power modules that each have a substantially similar star section. The star section utilizes an oscillating signal to generate an internal clock signal. The star section utilizes a star link signal to determine the phase of the oscillating signal. Either the addition of a power module to a power system or the removal of a power module from a power system including at least three power modules will result in the adjustment of the spread of the phases of each of the power modules to an amount about equal to 360 degrees divided by the number of power modules in the power system.
摘要翻译： 适用于采用星形连接地形的电力系统的电源模块。 电源模块包括具有内部时钟连接和星形连接连接的星形部分。 电力系统包括多个功率模块，每个功率模块具有基本相似的星形部分。 星形部分利用振荡信号产生内部时钟信号。 星形部分利用星形链路信号来确定振荡信号的相位。 将功率模块添加到电力系统或从包括至少三个功率模块的电力系统中去除功率模块将导致每个功率模块的相位的扩展调整到大约相等的量 到360度除以电力系统中的功率模块数量。
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公开(公告)号：US4975821A
公开(公告)日：1990-12-04
申请号：US419212
申请日：1989-10-10
IPC分类号： H02M3/335
CPC分类号： H02M3/33538 , H02M3/33569 , Y02B70/1433
摘要： A forward switched mode converter power supply of a resettable type, in which leakage inductance in the input circuit, the parallel inductance of the transformer and the parasitic capacitance of the switching means provides a resonant circuit for recirculating commutation energy, so that the voltage across the switching means is reduced essentially to zero at the beginning of each switching cycle to prevent loss of the commutation energy.
摘要翻译： 一种可复位型的正向开关模式转换器电源，其中输入电路中的漏电感，变压器的并联电感和开关装置的寄生电容为再循环换向能提供了一个谐振电路， 在每个开关周期开始时，开关装置基本上被减小至零，以防止换向能量的损失。
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