公开(公告)号：US20100244800A1

公开(公告)日：2010-09-30

申请号：US12723385

申请日：2010-03-12

申请人： Masaru Nakamura ,  Chiharu Matsumoto

发明人： Masaru Nakamura ,  Chiharu Matsumoto

IPC分类号： G05F1/10

CPC分类号： H02M1/32 ,  H02M3/156

摘要： There is provided a switching power supply unit having an overcurrent detection circuit capable of automatically selecting either a current detection method using an resistor or a current detection method using an external current detection resistor and of performing optimized overcurrent protection depending on applications. In the control circuit of the switching power supply unit for detecting a current flowing through a high-side switch as a current detection signal and comparing it with an overcurrent detection threshold value to detect an overcurrent and turning off the high-side switch to protect the switching power supply unit, a first current detection terminal connected to a power supply side terminal of the high-side switch or to a load side terminal of the high-side switch and a temperature compensating means to switch for temperature compensation on an overcurrent detection threshold value or on a current detection signal are provided.

摘要翻译： 提供一种具有过电流检测电路的开关电源单元，其能够使用电阻器自动选择电流检测方法或使用外部电流检测电阻器的电流检测方法，并且根据应用执行优化的过电流保护。 在用于检测流过高侧开关的电流作为电流检测信号的开关电源单元的控制电路中，并将其与过电流检测阈值进行比较，以检测过电流并关闭高侧开关以保护 开关电源单元，连接到高侧开关的电源侧端子或高侧开关的负载侧端子的第一电流检测端子和用于对过电流检测阈值进行温度补偿的温度补偿装置 值或电流检测信号。

公开(公告)号：US08258763B2

公开(公告)日：2012-09-04

申请号：US12723385

申请日：2010-03-12

申请人： Masaru Nakamura ,  Chiharu Matsumoto

发明人： Masaru Nakamura ,  Chiharu Matsumoto

IPC分类号： G05F1/567 ,  G05F1/569 ,  G05F1/575

CPC分类号： H02M1/32 ,  H02M3/156

摘要： There is provided a switching power supply unit having an overcurrent detection circuit capable of automatically selecting either a current detection method using an resistor or a current detection method using an external current detection resistor and of performing optimized overcurrent protection depending on applications. In the control circuit of the switching power supply unit for detecting a current flowing through a high-side switch as a current detection signal and comparing it with an overcurrent detection threshold value to detect an overcurrent and turning off the high-side switch to protect the switching power supply unit, a first current detection terminal connected to a power supply side terminal of the high-side switch or to a load side terminal of the high-side switch and a temperature compensating means to switch for temperature compensation on an overcurrent detection threshold value or on a current detection signal are provided.

摘要翻译： 提供一种具有过电流检测电路的开关电源单元，其能够使用电阻器自动选择电流检测方法或使用外部电流检测电阻器的电流检测方法，并且根据应用执行优化的过电流保护。 在用于检测流过高侧开关的电流作为电流检测信号的开关电源单元的控制电路中，并将其与过电流检测阈值进行比较，以检测过电流并关闭高侧开关以保护 开关电源单元，连接到高侧开关的电源侧端子或高侧开关的负载侧端子的第一电流检测端子和用于对过电流检测阈值进行温度补偿的温度补偿装置 值或电流检测信号。