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    • 10. 发明授权
    • Fault detection circuits for switched mode power supplies and related methods of operation
    • 开关电源故障检测电路及相关操作方法
    • US08680884B2
    • 2014-03-25
    • US12756573
    • 2010-04-08
    • Joseph Paul Chobot
    • Joseph Paul Chobot
    • G01R31/40
    • G01R31/40H02M1/32H05B33/0887
    • A circuit for detecting fault conditions in a supply circuit includes a monitoring circuit and a comparator circuit. The monitoring circuit is operable to output a detection signal related to a control signal for the switched mode power supply. The control signal may be configured to operate at least one switch of the supply circuit between alternating activated and deactivated states to supply power to a load. The comparator circuit is operable to compare the detection signal to a range defined by first and second thresholds and output a fault signal according to a relationship of the detection signal to the range over a time period. Related methods of operation are also discussed.
    • 用于检测供电电路中的故障状况的电路包括监控电路和比较器电路。 监视电路可操作地输出与开关模式电源的控制信号相关的检测信号。 控制信号可以被配置为在交替的激活和去激活状态之间操作供电电路的至少一个开关以向负载供电。 比较器电路可操作以将检测信号与由第一和第二阈值定义的范围进行比较,并根据检测信号与时间段的范围之间的关系输出故障信号。 还讨论了相关的操作方法。