公开(公告)号：US20100117610A1

公开(公告)日：2010-05-13

申请号：US12354780

申请日：2009-01-16

申请人： Li-Chieh Chen ,  Yu-Min Sun ,  Yu-Lee Yeh

发明人： Li-Chieh Chen ,  Yu-Min Sun ,  Yu-Lee Yeh

IPC分类号： G05F1/00

CPC分类号： H02M3/158

摘要： A bootstrap circuit is utilized in a bulk circuit using an NMOS transistor as a power switch. The bootstrap circuit includes a first PMOS transistor coupled between an internal power source and an offset capacitor, and a second PMOS transistor coupled between the gate of the first PMOS transistor and the offset capacitor, and an NMOS transistor coupled between the gate of the first PMOS transistor and ground. When the power switch is turned on, the second PMOS transistor is turned on for turning off the first PMOS transistor. When the power switch is turned off, the NMOS transistor is turned on for turning on the first PMOS transistor.

摘要翻译： 在使用NMOS晶体管作为电源开关的体电路中使用自举电路。 自举电路包括耦合在内部电源和偏移电容器之间的第一PMOS晶体管，以及耦合在第一PMOS晶体管的栅极和偏移电容器之间的第二PMOS晶体管，以及耦合在第一PMOS晶体管的栅极之间的NMOS晶体管 晶体管和地。 当电源开关导通时，第二PMOS晶体管导通以关断第一PMOS晶体管。 当电源开关关闭时，NMOS晶体管导通，导通第一个PMOS晶体管。

公开(公告)号：US08026705B2

公开(公告)日：2011-09-27

申请号：US12354780

申请日：2009-01-16

申请人： Li-Chieh Chen ,  Yu-Min Sun ,  Yu-Lee Yeh

发明人： Li-Chieh Chen ,  Yu-Min Sun ,  Yu-Lee Yeh

IPC分类号： G05F1/44 ,  G05F1/445 ,  G05F1/565

CPC分类号： H02M3/158

摘要： A bootstrap circuit is utilized in a bulk circuit using an NMOS transistor as a power switch. The bootstrap circuit includes a first PMOS transistor coupled between an internal power source and an offset capacitor, and a second PMOS transistor coupled between the gate of the first PMOS transistor and the offset capacitor, and an NMOS transistor coupled between the gate of the first PMOS transistor and ground. When the power switch is turned on, the second PMOS transistor is turned on for turning off the first PMOS transistor. When the power switch is turned off, the NMOS transistor is turned on for turning on the first PMOS transistor.

摘要翻译： 在使用NMOS晶体管作为电源开关的体电路中使用自举电路。 自举电路包括耦合在内部电源和偏移电容器之间的第一PMOS晶体管，以及耦合在第一PMOS晶体管的栅极和偏移电容器之间的第二PMOS晶体管，以及耦合在第一PMOS晶体管的栅极之间的NMOS晶体管 晶体管和地。 当电源开关导通时，第二PMOS晶体管导通以关断第一PMOS晶体管。 当电源开关关闭时，NMOS晶体管导通，导通第一个PMOS晶体管。

公开(公告)号：US20100109559A1

公开(公告)日：2010-05-06

申请号：US12329633

申请日：2008-12-07

申请人： Chih-Chia Chen ,  Yu-Lee Yeh ,  Kun-Huang Jheng

发明人： Chih-Chia Chen ,  Yu-Lee Yeh ,  Kun-Huang Jheng

IPC分类号： H05B41/36

CPC分类号： H05B33/0815 ,  H05B33/0827

摘要： An LED charge pump driving circuit includes a charge pump, a control circuit, a driver, and an LED. The charge pump generates an output voltage according to an input voltage. The driver drives the LED according to the output voltage so as to generate a load voltage. When the load voltage is greater than a first predetermined voltage, the charge pump is turned on. When the load voltage is smaller than a second predetermined voltage over a predetermined duration, the charge pump is turned off. When the load voltage is greater than a third predetermined voltage, the driver is locked.

摘要翻译： LED电荷泵驱动电路包括电荷泵，控制电路，驱动器和LED。 电荷泵根据输入电压产生输出电压。 驱动器根据输出电压驱动LED，以产生负载电压。 当负载电压大于第一预定电压时，电荷泵接通。 当负载电压在预定时间内小于第二预定电压时，电荷泵被关闭。 当负载电压大于第三预定电压时，驱动器被锁定。