公开(公告)号：US20110122659A1

公开(公告)日：2011-05-26

申请号：US12638809

申请日：2009-12-15

申请人： Jianhua Duan ,  Qiang Zong ,  YaJiang Zhu

发明人： Jianhua Duan ,  Qiang Zong ,  YaJiang Zhu

IPC分类号： H02M3/335 ,  G05F1/10

CPC分类号： H03K17/16 ,  G05F3/26 ,  G05F3/267 ,  G05F3/30 ,  H02M3/33507 ,  H03K17/04123 ,  H03K2217/0036

摘要： A power supply controller is provided for providing a drive current to a control terminal of a power transistor in three time intervals. The controller includes control circuits configured to control the drive current in multiple stages. During a first time interval, first drive current includes a current spike for turning on the power transistor in response to a start of the control signal pulse. During a second time interval, a second drive current includes a ramping current substantially proportional to a magnitude of a current through the power transistor. During a third time interval, current flow to the power transistor is at least partially turned off before an end of the control signal pulse.

摘要翻译： 提供电源控制器，用于以三个时间间隔向功率晶体管的控制端提供驱动电流。 该控制器包括配置成控制多级驱动电流的控制电路。 在第一时间间隔期间，第一驱动电流包括用于响应于控制信号脉冲的启动来接通功率晶体管的电流尖峰。 在第二时间间隔期间，第二驱动电流包括基本上与通过功率晶体管的电流的大小成比例的斜坡电流。 在第三时间间隔期间，在控制信号脉冲结束之前，至功率晶体管的电流至少部分截止。

公开(公告)号：US20110096578A1

公开(公告)日：2011-04-28

申请号：US12604246

申请日：2009-10-22

申请人： ShaoHua Fang ,  BaoZhen Chen ,  Qiang Zong ,  YaJiang Zhu

发明人： ShaoHua Fang ,  BaoZhen Chen ,  Qiang Zong ,  YaJiang Zhu

IPC分类号： H02M7/217

CPC分类号： H02M3/33592 ,  H02M3/33561 ,  H02M3/33576 ,  H02M7/217 ,  H03K5/08 ,  H03K17/133 ,  H03K17/302 ,  H03K2017/307 ,  Y02B70/1475

摘要： A synchronous rectification circuit for a power converter includes a power switch coupled to a transformer and an output capacitor and a switching control circuit configured to provide a control signal to the power switch in response to a first state and a second state of the voltage across the power switch. In the switching control circuit, the second state is determined prior to the first state is determined. In an embodiment, the switching control circuit includes a voltage comparing unit configured to act in response to the first and second inputs. The voltage comparing unit is also configured to output a logic signal according to the voltage difference between the sensed voltage drop across the power switch and a reference threshold voltage. A logic processing circuit is coupled to the voltage comparing unit and configured to provide the first state and the second state of the voltage across the power switch.

摘要翻译： 用于功率转换器的同步整流电路包括耦合到变压器的电源开关和输出电容器，以及开关控制电路，其被配置为响应于第一状态和第二状态的电压来向功率开关提供控制信号 开关;电源开关。 在开关控制电路中，在确定第一状态之前确定第二状态。 在一个实施例中，开关控制电路包括被配置为响应于第一和第二输入而动作的电压比较单元。 电压比较单元还被配置为根据感测到的电源开关上的电压降与参考阈值电压之间的电压差输出逻辑信号。 逻辑处理电路耦合到电压比较单元并且被配置为在电源开关上提供电压的第一状态和第二状态。

公开(公告)号：US08526202B2

公开(公告)日：2013-09-03

申请号：US12604246

申请日：2009-10-22

申请人： ShaoHua Fang ,  BaoZhen Chen ,  Qiang Zong ,  YaJiang Zhu

发明人： ShaoHua Fang ,  BaoZhen Chen ,  Qiang Zong ,  YaJiang Zhu

IPC分类号： H02M7/217

CPC分类号： H02M3/33592 ,  H02M3/33561 ,  H02M3/33576 ,  H02M7/217 ,  H03K5/08 ,  H03K17/133 ,  H03K17/302 ,  H03K2017/307 ,  Y02B70/1475

摘要： A synchronous rectification circuit for a power converter includes a power switch coupled to a transformer and an output capacitor and a switching control circuit configured to provide a control signal to the power switch in response to a first state and a second state of the voltage across the power switch. In the switching control circuit, the second state is determined prior to the first state is determined. In an embodiment, the switching control circuit includes a voltage comparing unit configured to act in response to the first and second inputs. The voltage comparing unit is also configured to output a logic signal according to the voltage difference between the sensed voltage drop across the power switch and a reference threshold voltage. A logic processing circuit is coupled to the voltage comparing unit and configured to provide the first state and the second state of the voltage across the power switch.

摘要翻译： 用于功率转换器的同步整流电路包括耦合到变压器的电源开关和输出电容器，以及开关控制电路，其被配置为响应于第一状态和第二状态的电压来向功率开关提供控制信号 开关;电源开关。 在开关控制电路中，在确定第一状态之前确定第二状态。 在一个实施例中，开关控制电路包括被配置为响应于第一和第二输入而动作的电压比较单元。 电压比较单元还被配置为根据感测到的电源开关上的电压降与参考阈值电压之间的电压差输出逻辑信号。 逻辑处理电路耦合到电压比较单元并且被配置为在电源开关上提供电压的第一状态和第二状态。

公开(公告)号：US08587968B2

公开(公告)日：2013-11-19

申请号：US13364269

申请日：2012-02-01

申请人： YaJiang Zhu ,  Jia Xie ,  Yongbo Zhang ,  Chao Chen ,  Shuzhuang Lv

发明人： YaJiang Zhu ,  Jia Xie ,  Yongbo Zhang ,  Chao Chen ,  Shuzhuang Lv

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： A switching mode power supply (SMPS) includes a transformer having a primary winding, a secondary winding for providing an output voltage, and an auxiliary winding. The SMPS also includes a power switch coupled to the primary winding. A first control circuit is coupled to the secondary winding, and is configured to provide a first electrical signal to the secondary winding when the output voltage of the SMPS is less than a reference voltage during a discontinuous time, whereupon a second electrical signal is induced in the auxiliary winding. A second control circuit is coupled to the auxiliary winding and the power switch. The second control circuit is configured to regulate the output of the SMPS by controlling the power switch in response to a feedback voltage signal from the auxiliary winding, and is further configured to turn on the power switch in response to the second electrical signal.

摘要翻译： 开关模式电源（SMPS）包括具有初级绕组的变压器，用于提供输出电压的次级绕组和辅助绕组。 SMPS还包括耦合到初级绕组的电源开关。 第一控制电路耦合到次级绕组，并且被配置为当在不连续时间期间SMPS的输出电压小于参考电压时，向次级绕组提供第一电信号，由此在第二电信号中引入第二电信号 辅助绕组。 第二控制电路耦合到辅助绕组和电源开关。 第二控制电路被配置为通过响应于来自辅助绕组的反馈电压信号控制功率开关来调节SMPS的输出，并且还被配置为响应于第二电信号而接通功率开关。

公开(公告)号：US08125799B2

公开(公告)日：2012-02-28

申请号：US12605081

申请日：2009-10-23

申请人： YaJiang Zhu ,  Jia Xie ,  Yongbo Zhang ,  Chao Chen ,  Shuzhuang Lv

发明人： YaJiang Zhu ,  Jia Xie ,  Yongbo Zhang ,  Chao Chen ,  Shuzhuang Lv

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： Circuits and method for sensing a system output voltage change and transmitting an electrical signal to an auxiliary winding on the primary side. In an embodiment, a primary side controller detects the electrical signal and turns a power switch on and off to transfer energy from a primary winding to a secondary winding. A secondary side controller generates a voltage pulse at a terminal of the secondary winding when the system output voltage is below a reference voltage. The secondary side controller includes an input terminal connected to a system output, an output terminal connected to a terminal of the secondary winding, and a ground terminal connected to a ground potential of the system output.

摘要翻译： 用于感测系统输出电压的电路和方法改变并将电信号发送到初级侧的辅助绕组。 在一个实施例中，初级侧控制器检测电信号并打开和关闭电源开关以将能量从初级绕组传递到次级绕组。 当系统输出电压低于参考电压时，次级侧控制器在次级绕组的端子处产生电压脉冲。 次级侧控制器包括连接到系统输出的输入端子，连接到次级绕组的端子的输出端子和连接到系统输出的地电位的接地端子。

公开(公告)号：US20110096573A1

公开(公告)日：2011-04-28

申请号：US12605081

申请日：2009-10-23

申请人： YaJiang Zhu ,  Jia Xie ,  Yongbo Zhang ,  Chao Chen ,  Shuzhuang Lv

发明人： YaJiang Zhu ,  Jia Xie ,  Yongbo Zhang ,  Chao Chen ,  Shuzhuang Lv

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： Circuits and method for sensing a system output voltage change and transmitting an electrical signal to an auxiliary winding on the primary side. In an embodiment, a primary side controller detects the electrical signal and turns a power switch on and off to transfer energy from a primary winding to a secondary winding. A secondary side controller generates a voltage pulse at a terminal of the secondary winding when the system output voltage is below a reference voltage. The secondary side controller includes an input terminal connected to a system output, an output terminal connected to a terminal of the secondary winding, and a ground terminal connected to a ground potential of the system output.

摘要翻译： 用于感测系统输出电压的电路和方法改变并将电信号发送到初级侧的辅助绕组。 在一个实施例中，初级侧控制器检测电信号并打开和关闭电源开关以将能量从初级绕组传递到次级绕组。 当系统输出电压低于参考电压时，次级侧控制器在次级绕组的端子处产生电压脉冲。 次级侧控制器包括连接到系统输出的输入端子，连接到次级绕组的端子的输出端子和连接到系统输出的地电位的接地端子。

公开(公告)号：US20120134182A1

公开(公告)日：2012-05-31

申请号：US13364269

申请日：2012-02-01

申请人： YaJiang Zhu ,  Jia Xie ,  Yongbo Zhang ,  Chao Chen ,  Shuzhuang Lv

发明人： YaJiang Zhu ,  Jia Xie ,  Yongbo Zhang ,  Chao Chen ,  Shuzhuang Lv

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： A switching mode power supply (SMPS) includes a transformer having a primary winding, a secondary winding for providing an output voltage, and an auxiliary winding. The SMPS also includes a power switch coupled to the primary winding. A first control circuit is coupled to the secondary winding, and is configured to provide a first electrical signal to the secondary winding when the output voltage of the SMPS is less than a reference voltage during a discontinuous time, whereupon a second electrical signal is induced in the auxiliary winding. A second control circuit is coupled to the auxiliary winding and the power switch. The second control circuit is configured to regulate the output of the SMPS by controlling the power switch in response to a feedback voltage signal from the auxiliary winding, and is further configured to turn on the power switch in response to the second electrical signal.

摘要翻译： 开关模式电源（SMPS）包括具有初级绕组的变压器，用于提供输出电压的次级绕组和辅助绕组。 SMPS还包括耦合到初级绕组的电源开关。 第一控制电路耦合到次级绕组，并且被配置为当在不连续时间期间SMPS的输出电压小于参考电压时，向次级绕组提供第一电信号，由此在第二电信号中引入第二电信号 辅助绕组。 第二控制电路耦合到辅助绕组和电源开关。 第二控制电路被配置为通过响应于来自辅助绕组的反馈电压信号控制功率开关来调节SMPS的输出，并且还被配置为响应于第二电信号而接通功率开关。