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    • 5. 发明授权
    • Charge pump rush current limiting circuit
    • 电荷泵冲击电流限流电路
    • US06738272B2
    • 2004-05-18
    • US10124354
    • 2002-04-16
    • Junko YamanakaToshiki IshiiKatsunori Kimura
    • Junko YamanakaToshiki IshiiKatsunori Kimura
    • H02M318
    • H02M3/07Y10S323/908
    • In a charge pump circuit, a constant current circuit is disposed between an input power supply and an output capacitor, when a power supply is started to turn on, the operation of the charge pump circuit is stopped, and the output capacitor is charged up to a given voltage by the constant current circuit, and thereafter the normal operation of the charge pump is started to limit the rush current. When the power supply is started, the operation is conducted by an oscillator circuit having a small duty ratio, and thereafter the control is replaced by the PFM control having the normal duty ratio, to thereby reduce the rush current as compared with that of the conventional PFM control. When the power supply is started, a pre-driver including a current limiting element is used to drive a driver, resulting in such an advantage that the rush current is reduced as compared with that driven by the conventional pre-driver.
    • 在电荷泵电路中,在输入电源和输出电容器之间设置恒流电路,当电源开始接通时,电荷泵电路的动作停止,输出电容充电至 通过恒流电路的给定电压,然后开始电荷泵的正常操作以限制冲击电流。 当电源启动时,通过占空比小的振荡电路进行动作,之后用具有正常占空比的PFM控制代替控制,从而与现有技术相比减小了冲击电流 PFM控制。 当电源启动时,使用包括限流元件的预驱动器来驱动驱动器,从而产生与传统的前驱动器驱动相比冲击电流降低的优点。
    • 7. 发明授权
    • Overcurrent protection circuit
    • 过流保护电路
    • US07289308B2
    • 2007-10-30
    • US10996746
    • 2004-11-24
    • Katsunori Kimura
    • Katsunori Kimura
    • H02H3/08
    • G05F1/5735
    • An overcurrent protection circuit has an output voltage detection resistor for detecting an output voltage. A foldback overcurrent protection circuit detects an output current flowing through an output transistor and controls the output current flowing through the output transistor in accordance with the detected output current. A first logic generating circuit receives an overcurrent detection signal from the foldback overcurrent protection circuit corresponding to the detected output current. A second logic generating circuit receives a detection signal from the output voltage detection resistor corresponding to a decrease in the detected output voltage. An AND circuit receives and processes an overcurrent delay signal generated by the first logic generating circuit and a voltage detection signal generated by the second logic generating circuit. A negative voltage generating circuit receives an output from the AND circuit and outputs a negative voltage to the foldback overcurrent protection circuit to control the output current flowing through the output transistor.
    • 过电流保护电路具有检测输出电压的输出电压检测电阻。 折返过电流保护电路检测流过输出晶体管的输出电流,并根据检测到的输出电流控制流过输出晶体管的输出电流。 第一逻辑发生电路从对应于检测到的输出电流的折返过电流保护电路接收过电流检测信号。 第二逻辑发生电路从输出电压检测电阻接收检测信号,该检测信号对应于检测到的输出电压的降低。 AND电路接收并处理由第一逻辑发生电路产生的过电流延迟信号和由第二逻辑发生电路产生的电压检测信号。 负电压发生电路接收AND电路的输出,向折返过电流保护电路输出负电压,以控制流过输出晶体管的输出电流。
    • 8. 发明申请
    • Overcurrent protection circuit
    • 过流保护电路
    • US20050157437A1
    • 2005-07-21
    • US10996746
    • 2004-11-24
    • Katsunori Kimura
    • Katsunori Kimura
    • G05F1/56G05F1/573H02H7/00
    • G05F1/5735
    • An overcurrent protection circuit for a voltage regulator constituted by a depletion mode output transistor includes a foldback overcurrent protection circuit 9, an output voltage detection resistor 5, a first logic generating circuit 6 which receives an overcurrent detection signal 11 from the foldback overcurrent protection circuit 8 as its input, a second logic generating circuit 7 which receives a detection signal 13 from the output voltage detection resistor 5 representing decrease of the output voltage as its input, a negative voltage generating circuit 9, and an AND circuit 10.
    • 由耗尽型输出晶体管构成的电压调节器的过电流保护电路包括折返过电流保护电路9,输出电压检测电阻5,第一逻辑发生电路6,其从折返过电流保护电路8接收过电流检测信号11 作为其输入,第二逻辑生成电路7从输出电压检测电阻器5接收检测信号13,表示输出电压作为其输入的减小,负电压产生电路9和AND电路10。