公开(公告)号：US20130088898A1

公开(公告)日：2013-04-11

申请号：US13436779

申请日：2012-03-30

申请人： XIAORU GAO ,  YAJIANG ZHU ,  CHAO CHEN ,  MEILING ZHANG

发明人： XIAORU GAO ,  YAJIANG ZHU ,  CHAO CHEN ,  MEILING ZHANG

IPC分类号： H02M3/335

CPC分类号： H02M3/335 ,  H02M3/33507 ,  H02M2001/0032 ,  Y02B70/16

摘要： A switching mode power supply (SMPS) includes a power transistor coupled to the primary winding of transformer and a resistor coupled between the input power source and a control terminal of the power transistor for triggering a primary current flow through the power transistor for providing startup power. A primary side control circuit is configured to regulate the output of the SMPS. A secondary side control circuit is coupled to the secondary winding and being configured to provide a first electrical signal to the secondary winding when an output voltage of the SMPS is less than a first reference voltage, whereupon an awakening signal is induced in the auxiliary winding and causes the primary side control circuit to provide a turn-on signal to the power transistor. The primary side control circuit is configured to enter a standby mode or a normal operating mode in response to the awakening signal.

摘要翻译： 开关模式电源（SMPS）包括耦合到变压器的初级绕组的功率晶体管和耦合在输入电源和功率晶体管的控制端之间的电阻器，用于触发通过功率晶体管的初级电流以提供启动功率 。 初级侧控制电路被配置为调节SMPS的输出。 次级侧控制电路耦合到次级绕组，并且被配置为当SMPS的输出电压小于第一参考电压时，向次级绕组提供第一电信号，于是在辅助绕组中感应出唤醒信号， 使得初级侧控制电路向功率晶体管提供导通信号。 初级侧控制电路被配置为响应于唤醒信号进入待机模式或正常操作模式。

公开(公告)号：US08804380B2

公开(公告)日：2014-08-12

申请号：US13436779

申请日：2012-03-30

申请人： Xiaoru Gao ,  Yajiang Zhu ,  Chao Chen ,  Meiling Zhang

发明人： Xiaoru Gao ,  Yajiang Zhu ,  Chao Chen ,  Meiling Zhang

IPC分类号： H02M3/335 ,  H02M3/315

CPC分类号： H02M3/335 ,  H02M3/33507 ,  H02M2001/0032 ,  Y02B70/16

摘要： A switching mode power supply (SMPS) includes a power transistor coupled to the primary winding of transformer and a resistor coupled between the input power source and a control terminal of the power transistor for triggering a primary current flow through the power transistor for providing startup power. A primary side control circuit is configured to regulate the output of the SMPS. A secondary side control circuit is coupled to the secondary winding and being configured to provide a first electrical signal to the secondary winding when an output voltage of the SMPS is less than a first reference voltage, whereupon an awakening signal is induced in the auxiliary winding and causes the primary side control circuit to provide a turn-on signal to the power transistor. The primary side control circuit is configured to enter a standby mode or a normal operating mode in response to the awakening signal.

摘要翻译： 开关模式电源（SMPS）包括耦合到变压器的初级绕组的功率晶体管和耦合在输入电源和功率晶体管的控制端之间的电阻器，用于触发通过功率晶体管的初级电流以提供启动功率 。 初级侧控制电路被配置为调节SMPS的输出。 次级侧控制电路耦合到次级绕组，并且被配置为当SMPS的输出电压小于第一参考电压时，向次级绕组提供第一电信号，于是在辅助绕组中感应出唤醒信号， 使得初级侧控制电路向功率晶体管提供导通信号。 初级侧控制电路被配置为响应于唤醒信号进入待机模式或正常操作模式。