公开(公告)号：US06181541B2

公开(公告)日：2001-01-30

申请号：US09177795

申请日：1998-10-22

申请人： Shukri Souri ,  Hugh Duffy ,  Adrian I. Cogan ,  Mark Munch ,  Nick Nickols

发明人： Shukri Souri ,  Hugh Duffy ,  Adrian I. Cogan ,  Mark Munch ,  Nick Nickols

IPC分类号： H02H504

CPC分类号： H02H3/025 ,  H02H5/042 ,  H02H9/026 ,  H03K17/0822 ,  H03K2017/0806

摘要： A circuit protection device for protecting an electrical load includes a three-terminal switch element such as a bipolar, or junction or metal-oxide-semiconductor field effect, transistor and a positive temperature compensation (PTC) resistor. In several embodiments the PTC resistor is in series with the current-carrying electrodes of the transistor. In other embodiments the PTC resistor, or a second PTC resistor, is connected to a control element of the transistor. Both DC and AC load-protection circuits are described.

摘要翻译： 用于保护电负载的电路保护装置包括诸如双极或结或金属氧化物半导体场效应的三端开关元件，晶体管和正温度补偿（PTC）电阻器。 在几个实施例中，PTC电阻器与晶体管的载流电极串联。 在其他实施例中，PTC电阻器或第二PTC电阻器连接到晶体管的控制元件。 描述直流和交流负载保护电路。

公开(公告)号：US06188556B1

公开(公告)日：2001-02-13

申请号：US09177666

申请日：1998-10-22

申请人： Shukri Souri ,  Chris McCoy ,  Hugh Duffy ,  Adrian I. Cogan ,  Ram G. Bommakanti

发明人： Shukri Souri ,  Chris McCoy ,  Hugh Duffy ,  Adrian I. Cogan ,  Ram G. Bommakanti

IPC分类号： H02H504

CPC分类号： H03K17/0826 ,  H02H3/025 ,  H02H5/042 ,  H02H9/026 ,  H03K2017/0806

摘要： The present invention provides a two-terminal, transistor-PTC, circuit protection device that has a reduced size and weight and is particularly suitable for use, for example, in portable electronic devices and high density electronic circuits. According to one embodiment of the present invention, a circuit protection device comprises a positive coefficient temperature (PTC) element and a bipolar transistor having base, collector, and emitter terminals. The PTC element is connected between the base and collector terminals of the transistor. The PTC element may be thermally coupled to the transistor and packaged with the transistor as a hybrid device. An electrical load may be connected to the collector terminal of the transistor. According to another embodiment of the present invention, a circuit protection device comprises a PTC element and a Darlington circuit having base, collector and emitter terminals. The PTC element is connected between the base and collector terminals of the Darlington circuit. The PTC element may be thermally coupled to the Darlington circuit and packaged with the Darlington circuit as a hybrid device. An electrical load may be connected to the collector terminal of the Darlington circuit. The Darlington circuit may also be a complementary Darlington circuit.

摘要翻译： 本发明提供一种具有减小尺寸和重量的双端子晶体管PTC电路保护器件，并且特别适用于例如便携式电子设备和高密度电子电路中。 根据本发明的一个实施例，电路保护装置包括正系数温度（PTC）元件和具有基极，集电极和发射极端子的双极晶体管。 PTC元件连接在晶体管的基极和集电极端子之间。 PTC元件可以热耦合到晶体管并且与晶体管一起作为混合器件封装。 电负载可以连接到晶体管的集电极端子。 根据本发明的另一实施例，电路保护装置包括PTC元件和具有基极，集电极和发射极端子的达林顿电路。 PTC元件连接在达林顿电路的基极和集电极端子之间。 PTC元件可以热耦合到达林顿电路并与达林顿电路一起作为混合器件封装。 电负载可以连接到达林顿电路的集电极端子。 达林顿电路也可以是互补的达林顿电路。