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    • 4. 发明授权
    • Hot insertion power arrangement
    • 热插拔电源布置
    • US5726506A
    • 1998-03-10
    • US465164
    • 1995-06-05
    • Samuel F. Wood
    • Samuel F. Wood
    • H02B1/24H02H9/00H01B7/30
    • H02H9/004H02B1/24Y10T307/305Y10T307/492Y10T307/615
    • A plug-in module receives both primary and alternate power via mating connectors on the module and on the backplane. Multilevel connectors are used so that a module being inserted first receives alternate power and ground before primary power and signal connections are made. The initial connect to the alternate power supply directs the transient current to the alternate power supply through an isolating PN junction diode having a forward bias voltage drop of about 0.8 volts. When the module is fully inserted, the module is connected to both the primary and alternate power. Within each module the associated electrical load is now connected directly to the primary power bus. To prevent transient currents produced by the hot insertion of other plug-in modules from affecting the voltage level on the power bus, the primary voltage supply is connected to the primary power bus via a Schottky diode having a forward bias voltage of approximately 0.4 volts. Due to the lower voltage drop by the Schottky diode, the isolating PN junction diode is no longer forward biased when the primary power is connected to the module. The alternate power bus will thus supply power to the module only during the short time from initial insertion into the backplane until the module is fully inserted.
    • 插件模块通过模块上的配对连接器和背板接收主电源和备用电源。 使用多级连接器,以便首先插入的模块在进行主电源和信号连接之前首先接收备用电源和接地。 初始连接到备用电源通过具有约0.8伏的正向偏压电压降的隔离PN结二极管将瞬态电流引导到备用电源。 当模块完全插入时,模块连接到主电源和备用电源。 在每个模块内,相关的电气负载现在直接连接到主电源总线。 为了防止其他插入式模块的热插入产生的瞬态电流影响电源总线上的电压电平,主电源通过具有大约0.4伏的正向偏置电压的肖特基二极管连接到主电源总线。 由于肖特基二极管的电压降较低,当主电源连接到模块时,隔离PN结二极管不再正向偏置。 因此,备用电源总线仅在从初始插入背板的短时间内向模块供电,直到模块完全插入。