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    • 1. 发明授权
    • Method and apparatus for a multiple stage sequential synchronous regulator
    • 多级顺序同步调节器的方法和装置
    • US06218815B1
    • 2001-04-17
    • US09426482
    • 1999-10-26
    • Barry K. KatesEdward P. Sheehan, Jr.
    • Barry K. KatesEdward P. Sheehan, Jr.
    • G05F140
    • H02M3/1584
    • A multiple stage sequential synchronous regulator including multiple switch stages activated in a sequential manner to reduce the frequency, stress and power loss per stage. In the preferred embodiment, each stage is implemented using buck regulator topology including an inductor and two synchronous switches, preferably comprising MOSFETs. A sequential logic circuit asserts corresponding enable signals to activate each of the stages one at a time in sequential manner. Each stage also receives a pulse width modulated (PWM) signal for activating the first synchronous switch during a power phase and then activating the second synchronous switch during a flux reversal phase for the enabled stage. The time sharing of multiple stages reduces the average current per stage and allows increased utilization of the switching parts per stage. Thus, the typically large and expensive power inductors and switches are replaced with significantly smaller, lighter and cheaper components. Furthermore, each switched device can be pushed past its rated limits due to smaller average current, thereby increasing the efficiency of each of the parts. A single output capacitor is coupled to all of the stages for filtering the output voltage. The output capacitor can remain small since it sees the cumulative frequency of all of the switch stages combined.
    • 多级顺序同步调节器包括以顺序方式激活的多个开关级,以降低每级的频率,应力和功率损耗。 在优选实施例中,使用包括电感器和优选地包括MOSFET的两个同步开关的降压调节器拓扑来实现每个级。 顺序逻辑电路断言相应的使能信号以顺序的方式一次一个地激活每个级。 每个级还接收脉冲宽度调制(PWM)信号,用于在电力阶段激活第一同步开关,然后在启用级的通量反转阶段期间激活第二同步开关。 多级的时间共享降低了每级的平均电流,并允许每个阶段更多地利用开关部件。 因此,典型的大型和昂贵的功率电感器和开关被显着更小,更轻和更便宜的部件替代。 此外,由于较小的平均电流,每个开关装置可以被推到超过其额定极限,从而提高每个部件的效率。 单个输出电容器耦合到所有级以对输出电压进行滤波。 输出电容器可以保持较小,因为它看到所有开关级的累积频率合并。
    • 2. 发明授权
    • Method and apparatus for a multiple stage sequential synchronous
regulator
    • 多级顺序同步调节器的方法和装置
    • US5973485A
    • 1999-10-26
    • US905837
    • 1997-08-04
    • Barry K. KatesEdward P. Sheehan, Jr.
    • Barry K. KatesEdward P. Sheehan, Jr.
    • H02M3/158G05F1/40
    • H02M3/1584
    • A multiple stage sequential synchronous regulator including multiple switch stages activated in a sequential manner to reduce the frequency, stress and power loss per stage. In the preferred embodiment, each stage is implemented using buck regulator topology including an inductor and two synchronous switches, preferably comprising MOSFETs. A sequential logic circuit asserts corresponding enable signals to activate each of the stages one at a time in sequential manner. Each stage also receives a pulse width modulated (PWM) signal for activating the first synchronous switch during a power phase and then activating the second synchronous switch during a flux reversal phase for the enabled stage. The time sharing of multiple stages reduces the average current per stage and allows increased utilization of the switching parts per stage. Thus, the typically large and expensive power inductors and switches are replaced with significantly smaller, lighter and cheaper components. Furthermore, each switched device can be pushed past its rated limits due to smaller average current, thereby increasing the efficiency of each of the parts. A single output capacitor is coupled to all of the stages for filtering the output voltage. The output capacitor can remain small since it sees the cumulative frequency of all of the switch stages combined.
    • 多级顺序同步调节器包括以顺序方式激活的多个开关级,以降低每级的频率,应力和功率损耗。 在优选实施例中,使用包括电感器和优选地包括MOSFET的两个同步开关的降压调节器拓扑来实现每个级。 顺序逻辑电路断言相应的使能信号以顺序的方式一次一个地激活每个级。 每个级还接收脉冲宽度调制(PWM)信号,用于在电力阶段激活第一同步开关,然后在启用级的通量反转阶段期间激活第二同步开关。 多级的时间共享降低了每级的平均电流,并允许每个阶段更多地利用开关部件。 因此,典型的大型和昂贵的功率电感器和开关被显着更小,更轻和更便宜的部件替代。 此外,由于较小的平均电流,每个开关装置可以被推到超过其额定极限,从而提高每个部件的效率。 单个输出电容器耦合到所有级以对输出电压进行滤波。 输出电容器可以保持较小,因为它看到所有开关级的累积频率合并。