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    • 62. 发明申请
    • STARTUP FOR DC/DC CONVERTERS
    • 启动DC / DC转换器
    • WO2007127463A3
    • 2008-06-05
    • PCT/US2007010433
    • 2007-04-27
    • AIVAKADOWLATABADI AHMAD B
    • DOWLATABADI AHMAD B
    • H02M1/36G05F1/656
    • H02M1/36
    • A design and method for controlling the initial inductor current in a DC/DC switching regulator. The T On or T Off time, depending upon implementation, is gradually increased such that power applied to a load is initially constrained until the system reaches a stable state, at which time normal power is connected to the load. In an embodiment, the on or off time is limited by a circuit which controls a pair of complementary transistors. The states of the transistors are controlled by the use of a startup-phase voltage and a reference voltage, which are then compared in an error amplifier. The result of the comparison is compared to a sawtooth signal in a comparator, the output of which controls the state of complementary transistors.
    • 用于控制DC / DC开关稳压器中的初始电感电流的设计和方法。 根据实施方式,T开始或T 时间逐渐增加,使得施加到负载的功率最初受到限制,直到系统达到稳定状态,此时 正常电源连接到负载。 在一个实施例中,导通或关断时间由控制一对互补晶体管的电路限制。 通过使用启动相电压和参考电压来控制晶体管的状态,然后在误差放大器中进行比较。 将比较的结果与比较器中的锯齿波信号进行比较,比较器的输出控制互补晶体管的状态。
    • 63. 发明申请
    • POWER FACTOR CORRECTION CIRCUIT ARRANGEMENT
    • 功率因数校正电路布置
    • WO02079892B1
    • 2004-04-08
    • PCT/US0206196
    • 2002-02-28
    • CHAMPION MICROELECTRONIC CORPHWANG JEFFREY
    • HWANG JEFFREY
    • H02M1/00H02M1/42G05F1/70G05F1/656H02M3/155
    • H02M1/4225Y02B70/126Y02P80/112
    • A rectified alternating-current (AC) input signal applied across inputs of a voltage converter circuit, such as a boost converter (106). Current drawn by the voltage converter (106) may be sensed to form a first sensing signal that is representative of the current. The rectified input voltage may be converted to a second sensing signal that is representative of the AC input signal. Switching (SW1, SW2) in the power converter (106) is adjusted in a first feedback loop to equalize the first and second sensing signals and, thus, the current drawn is regulated to remain in phase with the AC input signal. A feedback signal adjusts switching (SW1, SW 2) so as to regulate the output voltage level of the voltage converter (106) in a second feedback loop and, thus, controls power delivered to the load (108).
    • 在诸如升压转换器(106)的电压转换器电路的输入端上施加经整流的交流(AC)输入信号。 可以感测由电压转换器(106)汲取的电流以形成代表电流的第一感测信号。 经整流的输入电压可以转换成代表AC输入信号的第二感测信号。 在第一反馈环路中调整功率转换器(106)中的开关(SW1,SW2)以均衡第一和第二感测信号,因此调节电流与AC输入信号保持同相。 反馈信号调节开关(SW1,SW2),以便在第二反馈回路中调节电压转换器(106)的输出电压电平,从而控制输送到负载(108)的功率。
    • 65. 发明申请
    • INTEGRATED FET SYNCHRONOUS MULTIPHASE BUCK CONVERTER WITH INNOVATIVE OSCILLATOR
    • 集成式FET同步多相BUCK转换器与创新振荡器
    • WO2006063323A2
    • 2006-06-15
    • PCT/US2005/044830
    • 2005-12-12
    • NUPOWER SEMICONDUCTOR, INC.TABAIAN, FereydunSADATI, HamedHEJAZI, Ali
    • TABAIAN, FereydunSADATI, HamedHEJAZI, Ali
    • G05F1/656G05F1/652
    • H03K17/6871H02M1/08H02M3/1584H02M3/33592H03K17/166Y02B70/1475
    • A power conversion system, preferably a buck converter, having (i) an oscillator, (ii) a pulse width modulator, (iii) and a nonoverlap clock generator and level shifter, wherein the improvement comprises the elimination of an external resistor divider is described. The buck converter can convert input voltage ranging from approximately 3V to 5V down to approximately 0.7-1.0V, 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V without the use of resistor dividers. The voltage input identifiers select one of the possible output settings for flexibility and accuracy. The integrated field emitting transistors can provide a continuous current of at least 6A. Additionally, peak current mode and an oscillator enable multiphase operation, up to ten buck converters, for up to 60A output current. The multiphase operation reduces the output inductor size, and number of bulk capacitors. Moreover, the multiphase operation yields higher efficiency and provides high transient response for demanding applications.
    • 具有(i)振荡器,(ii)脉冲宽度调制器,(iii)和非重叠时钟发生器和电平转换器的电力转换系统,优选地是降压转换器,其中所述改进包括消除外部电阻器分压器 。 降压转换器可以将输入电压范围从大约3V到5V转换为大约0.7-1.0V,1.2V,1.5V,1.8V,2.5V和3.3V,而不使用电阻分压器。 电压输入标识符为灵活性和准确性选择可能的输出设置之一。 集成的场发射晶体管可以提供至少6A的连续电流。 此外,峰值电流模式和振荡器可实现多达十个降压转换器的多相操作,可实现高达60A的输出电流。 多相操作可减少输出电感尺寸和大容量电容器数量。 此外,多相操作产生更高的效率,并为要求苛刻的应用提供高瞬态响应。
    • 67. 发明公开
    • IMPROVED METHOD OF DETECTING SWITCHING POWER SUPPLY OUTPUT CURRENT
    • VERBESSERTES VERFAHREN ZUR ERKENNUNG DES AUSGANGSSTROMS EINES SCHALTNETZTEILS
    • EP1595189A4
    • 2010-11-24
    • EP04707758
    • 2004-02-03
    • JAM TECHNOLOGIES LLC
    • KIRN LARRY
    • G05F1/652G05F1/10G05F1/40G05F1/44G05F1/56G05F1/613G05F1/618G05F1/656G05F3/00G05F3/16H02M3/156H02M3/158
    • H02M3/156H02M2001/0009
    • A method and apparatus for detecting output current in switching power supplies forgoes the need for any resistor or other components in series with the load. A method according to the invention includes the steps of inferring the peak current through the inductor as a function of input voltage and inductor charge time, and deriving the current available to the load based upon the flyback voltage during discharge of the inductor. Although a disclosed example is based upon a buck/boost topology, other converter topologies are anticipated. In terms of apparatus, in a switching power supply of the type wherein a switching device is used to charge an inductor that discharges to a load, the invention provides devices arranged for detecting output current without the need for a resistor or other component in series with the load. In the preferred embodiment, these devices include electrical components operative to generate a signal indicative of peak inductor current, and a switch for switching the signal to provide a waveform, the integral of which is proportional to peak inductor current multiplied by the duty cycle of the discharge of the inductor. Circuitry is further used for comparing the waveform to a fixed reference so as to output a signal indicative of load current.
    • 用于检测开关电源中的输出电流的方法和装置禁止对负载串联的任何电阻器或其它部件的需要。 根据本发明的方法包括以下步骤:根据输入电压和电感器充电时间推断通过电感器的峰值电流,并且基于在电感器放电期间的反激电压导出可用于负载的电流。 虽然所公开的示例基于降压/升压拓扑,但是预期其它转换器拓扑。 在装置方面,在使用开关装置对放电到负载的电感器进行充电的开关电源中,本发明提供了用于检测输出电流而不需要电阻器或其它与 负载。 在优选实施例中,这些器件包括可用于产生指示峰值电感器电流的信号的电气部件,以及用于切换信号以提供波形的开关,该波形的积分与峰值电感器电流乘以乘法器的占空比成比例 电感放电。 电路进一步用于将波形与固定基准进行比较,以输出表示负载电流的信号。
    • 70. 发明公开
    • Reference voltage source
    • Referenzspannungsquelle。
    • EP0564071A1
    • 1993-10-06
    • EP93300619.9
    • 1993-01-28
    • Hewlett-Packard Company
    • Steinbach, Gunter
    • H03M1/36G05F1/46G05F1/656
    • G05F1/648G05F1/577G05F3/16
    • A reference voltage source (11) which provides a plurality of reference voltages with equal step size between voltages despite loads connected to the reference voltage source (11). The reference voltage source (11) is composed of a plurality of slave resistors (13, 15, 17) connected in series to produce a plurality of output nodes (21, 23, 25, 27) and a plurality of master resistors (29, 31, 33) connected in series to produce a plurality of compensation nodes (37, 39, 41, 43). Each compensation node (37, 39, 41, 43) corresponds with one of the output nodes (21, 23, 25, 27). A compensation resistor (45, 47, 49, 51) connects between a compensation node (37, 39, 41, 43) and the corresponding output node (21, 23, 25, 27). A current flows through the slave resistors (13, 15, 17) to generate a reference voltage at each output node (21, 23, 25, 27). Another current flows through the master resistors (29, 31, 33) and generates at each compensation node (37, 39, 41, 43) a compensation voltage that differs from the reference voltage at the corresponding output node (21, 23, 25, 27) by a magnitude sufficient to cause a compensation current (64, 65, 66, 67) to flow through the associated compensation resistor (45, 47, 49, 51) into the corresponding output node (21, 23, 25, 27) and offset a load current (60, 61, 62, 63) drawn from the output node (21, 23, 25, 27) by a load connected to the output node.
    • 参考电压源(11),其提供在电压之间具有相等步长的多个参考电压,而不管负载连接到参考电压源(11)。 参考电压源(11)由串联连接的多个从属电阻器(13,15,17)组成,以产生多个输出节点(21,23,25,27)和多个主电阻器(29, 31,33)串联连接以产生多个补偿节点(37,39,41,43)。 每个补偿节点(37,39,41,43)对应于输出节点(21,23,25,27)中的一个。 补偿电阻(45,47,49,51)在补偿节点(37,39,41,43)和相应的输出节点(21,23,25,27)之间连接。 A电流流经从属电阻器(13,15,17),以在每个输出节点(21,23,25,27)产生参考电压。 另一个电流流过主电阻(29,31,33),并在每个补偿节点(37,39,41,43)处产生与相应输出节点(21,23,25,34,31,33)上的参考电压不同的补偿电压, 27)具有足以使补偿电流(64,65,66,67)通过相关联的补偿电阻(45,47,49,51)流入相应的输出节点(21,23,25,27)的量值, 以及通过连接到所述输出节点的负载来偏移从所述输出节点(21,23,25,27)绘出的负载电流(60,61,62,63)。