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    • 3. 发明授权
    • Apparatus and methods for power conversion
    • 电源转换装置及方法
    • US07903442B2
    • 2011-03-08
    • US11565620
    • 2006-11-30
    • Brent McDonaldBrian P. Johnson
    • Brent McDonaldBrian P. Johnson
    • H02M7/155
    • H02M7/217
    • An alternating current (AC) to direct current (DC) power converter comprises a first electrical path in a primary circuit having an inductor coupled in series with a first primary winding and a first switch to a ground connection. A second electrical path in the primary circuit has the inductor coupled in series with a second primary winding and a second switch to the ground connection. A secondary circuit is electromagnetically coupled to the primary circuit. A controller operates the first switch and the second switch in a predetermined manner to induce a current in the secondary circuits.
    • 直流(DC)功率转换器的交流电(AC)包括在初级电路中的第一电路,其具有与第一初级绕组串联耦合的电感器和与接地连接的第一开关。 初级电路中的第二电路具有与第二初级绕组串联的电感器和与接地连接的第二开关。 次级电路与主电路电磁耦合。 控制器以预定方式操作第一开关和第二开关以在次级电路中感应电流。
    • 5. 发明授权
    • Extending the continuous mode of operation for a buck converter
    • 扩展降压转换器的连续工作模式
    • US07498783B2
    • 2009-03-03
    • US11175571
    • 2005-07-06
    • Brian P. Johnson
    • Brian P. Johnson
    • G05F1/00
    • H02M1/15H02M3/157H02M3/1588Y02B70/1466
    • An information handling system has a power supply using a DC-to-DC buck converter. The DC-to-DC buck converter maintains continuous mode of operation over a wide range of output currents by adding more inductance to the buck converter circuit when the load current is below a certain value(s). A sensing circuit may determine load current and at the certain value(s) more inductance (increased inductance value) may be added to the buck converter circuit so as to main a continuous mode of operation. When the load current increases above the certain value, the extra inductance may be removed (inductance value decreased). Thus, the buck converter may operate most efficiently and remain in the continuous operation mode for a wider range of load currents.
    • 信息处理系统具有使用DC-DC降压转换器的电源。 当负载电流低于一定值时,DC-DC降压转换器通过在降压转换器电路中增加更多的电感,在宽范围的输出电流下保持连续工作模式。 感测电路可以确定负载电流,并且在一定值时,可以将更多的电感(增加的电感值)添加到降压转换器电路,从而主要连续工作模式。 当负载电流增加到特定值以上时,可以去除额外的电感(电感值减小)。 因此,降压转换器可以最有效地操作并且在更宽的负载电流范围内保持在连续操作模式。
    • 8. 发明申请
    • POWER SUPPLY CONVERTER AND METHOD
    • 电源转换器及方法
    • US20110148377A1
    • 2011-06-23
    • US12641173
    • 2009-12-17
    • Tod SchiffBrian P. Johnson
    • Tod SchiffBrian P. Johnson
    • G05F1/10
    • H02M3/1588Y02B70/1466
    • A power supply converter and a method for adjusting a threshold voltage in the power supply converter. The circuit includes first and second switches having current conducting terminals commonly connected together to form a node. An energy storage element may be connected to the node and a zero current detection comparator may be connected to the node. A first voltage may be provided at the control terminal of the first switch that turns it off. After the first switch is off, determining whether the first switch turned off before or after the current in the energy storage element has reached zero. This may be accomplished by determining whether the voltage at the first node is positive or negative. If the voltage at the first node is negative, the threshold voltage is increased and if the voltage at the first node is positive the threshold voltage is decreased.
    • 电源转换器和用于调整电源转换器中的阈值电压的方法。 该电路包括具有通常连接在一起以形成节点的电流导电端子的第一和第二开关。 能量存储元件可以连接到节点,并且零电流检测比较器可以连接到节点。 可以在第一开关的控制端子处提供第一电压,使其断开。 在第一开关断开之后,确定在能量存储元件中的电流之前或之后关闭第一开关是否已经达到零。 这可以通过确定第一节点处的电压是正还是负来实现。 如果第一节点处的电压为负,则阈值电压增加,如果第一节点处的电压为正,则阈值电压降低。