Power supply circuit with at least one feedback circuit feeding operating state of transformer back to pulse width modulation circuit thereof
    1.
    发明申请
    Power supply circuit with at least one feedback circuit feeding operating state of transformer back to pulse width modulation circuit thereof 有权
    电源电路具有至少一个反馈电路,将变压器的工作状态送回其脉宽调制电路

    公开(公告)号:US20080130327A1

    公开(公告)日:2008-06-05

    申请号:US11999235

    申请日:2007-12-03

    IPC分类号: H02M3/335

    CPC分类号: H02M3/33523

    摘要: An exemplary power supply circuit (20) includes a first commutating and filter circuit (21), a transformer (24), a second commutating and filter circuit (25), a transistor (27), a pulse width modulation circuit (26) outputting a control signal to control operation state of the transistor, and a feedback circuit (29). An external alternating current voltage is converted into a direct current with a cooperation operating of the transistor, the first commutating and filter circuit, the transformer, and the second commutating and filter circuit. The feedback circuit feeds an operating state of the transformer back to the pulse width modulation circuit, and the pulse width modulation circuit outputs corresponding control signals to turn on or turn off the transistor.

    摘要翻译: 示例性电源电路(20)包括第一整流和滤波电路(21),变压器(24),第二换向和滤波电路(25),晶体管(27),脉宽调制电路(26) 用于控制晶体管的操作状态的控制信号和反馈电路(29)。 外部交流电压通过晶体管,第一整流和滤波电路,变压器和第二换向和滤波电路的协作操作转换为直流电流。 反馈电路将变压器的工作状态反馈给脉宽调制电路,脉冲宽度调制电路输出相应的控制信号,使晶体管导通或截止。

    Power supply circuit with at least one feedback circuit feeding operating state of transformer back to pulse width modulation circuit thereof
    2.
    发明授权
    Power supply circuit with at least one feedback circuit feeding operating state of transformer back to pulse width modulation circuit thereof 有权
    电源电路具有至少一个反馈电路,将变压器的工作状态送回其脉宽调制电路

    公开(公告)号:US07755915B2

    公开(公告)日:2010-07-13

    申请号:US11999235

    申请日:2007-12-03

    IPC分类号: H02M3/335

    CPC分类号: H02M3/33523

    摘要: An exemplary power supply circuit (20) includes a first commutating and filter circuit (21), a transformer (24), a second commutating and filter circuit (25), a transistor (27), a pulse width modulation circuit (26) outputting a control signal to control operation state of the transistor, and a feedback circuit (29). An external alternating current voltage is converted into a direct current with a cooperation operating of the transistor, the first commutating and filter circuit, the transformer, and the second commutating and filter circuit. The feedback circuit feeds an operating state of the transformer back to the pulse width modulation circuit, and the pulse width modulation circuit outputs corresponding control signals to turn on or turn off the transistor.

    摘要翻译: 示例性电源电路(20)包括第一整流和滤波电路(21),变压器(24),第二换向和滤波电路(25),晶体管(27),脉宽调制电路(26) 用于控制晶体管的操作状态的控制信号和反馈电路(29)。 外部交流电压通过晶体管,第一整流和滤波电路,变压器和第二换向和滤波电路的协作操作转换为直流电流。 反馈电路将变压器的工作状态反馈给脉宽调制电路,脉冲宽度调制电路输出相应的控制信号,使晶体管导通或截止。

    Open protection circuit for backlight module
    3.
    发明申请
    Open protection circuit for backlight module 有权
    背光模块开路保护电路

    公开(公告)号:US20070120503A1

    公开(公告)日:2007-05-31

    申请号:US11604620

    申请日:2006-11-27

    IPC分类号: H05B41/36

    CPC分类号: H05B41/2855 Y02B20/186

    摘要: An open protection circuit (300) for a backlight module includes a PWM (350) with a control port (351) to disable the PWM. A switch (371) has a gate and a source connected to the control port. A plurality of first input circuits (330) includes first diodes (331), each of which has a first positive terminal connected to the gate and a negative terminal connected to ground. A plurality of second input circuits (340) include input resistors (341) connected to the control port. A plurality of detecting circuits (310, 380) are connected to the fluorescent lamps (311) and the first and second input circuits respectively. Each detecting circuit includes a sampling resistor (313) connected to one of the negative terminals of the first diodes, thereby the control port of the PWM is pulled low when either one of the fluorescent lamps are open-circuit.

    摘要翻译: 用于背光模块的开路保护电路(300)包括具有用于禁止PWM的控制端口(351)的PWM(350)。 开关(371)具有连接到控制端口的栅极和源极。 多个第一输入电路(330)包括第一二极管(331),每个第二二极管具有连接到栅极的第一正端子和与地连接的负端子。 多个第二输入电路(340)包括连接到控制端口的输入电阻(341)。 多个检测电路(310,380)分别连接到荧光灯(311)和第一和第二输入电路。 每个检测电路包括连接到第一二极管的负极之一的采样电阻器(313),因此当任一个荧光灯都是开路时,PWM的控制端口被拉低。

    Open protection circuit for backlight module
    4.
    发明授权
    Open protection circuit for backlight module 有权
    背光模块开路保护电路

    公开(公告)号:US07372218B2

    公开(公告)日:2008-05-13

    申请号:US11604620

    申请日:2006-11-27

    IPC分类号: H05B37/02 H02H3/08

    CPC分类号: H05B41/2855 Y02B20/186

    摘要: An open protection circuit (300) for a backlight module includes a PWM (350) with a control port (351) to disable the PWM. A switch (371) has a gate and a source connected to the control port. A plurality of first input circuits (330) includes first diodes (331), each of which has a first positive terminal connected to the gate and a negative terminal connected to ground. A plurality of second input circuits (340) include input resistors (341) connected to the control port. A plurality of detecting circuits (310, 380) are connected to the fluorescent lamps (311) and the first and second input circuits respectively. Each detecting circuit includes a sampling resistor (313) connected to one of the negative terminals of the first diodes, thereby the control port of the PWM is pulled low when either one of the fluorescent lamps are open-circuit.

    摘要翻译: 用于背光模块的开路保护电路(300)包括具有用于禁止PWM的控制端口(351)的PWM(350)。 开关(371)具有连接到控制端口的栅极和源极。 多个第一输入电路(330)包括第一二极管(331),每个第二二极管具有连接到栅极的第一正端子和与地连接的负端子。 多个第二输入电路(340)包括连接到控制端口的输入电阻(341)。 多个检测电路(310,380)分别连接到荧光灯(311)和第一和第二输入电路。 每个检测电路包括连接到第一二极管的负极之一的采样电阻器(313),因此当任一个荧光灯都是开路时,PWM的控制端口被拉低。

    Multiplexed direct current regulation output circuit having balance control circuit
    5.
    发明授权
    Multiplexed direct current regulation output circuit having balance control circuit 有权
    具有平衡控制电路的多路直流调节输出电路

    公开(公告)号:US07839021B2

    公开(公告)日:2010-11-23

    申请号:US12011697

    申请日:2008-01-28

    IPC分类号: H02J1/00

    摘要: An exemplary multiplexed direct current regulation output circuit (2) includes a feedback circuit (22), a sampling circuit (30), a power control chip (21), a first output (27), a second output (28), a first half wave rectifier circuit (23), a second half wave rectifier circuit (24), a first filter circuit (25), a second filter circuit (26), a transformer (20), and a balance control circuit (29). The transformer is configured to provide low voltages to the first output via the first half wave rectifier circuit and the first filter circuit in series, and provide high voltages to the second output via the second half wave rectifier circuit and the second filter circuit in series. The balance control circuit is configured to control a voltage at the second output.

    摘要翻译: 示例性的多路复用直流调节输出电路(2)包括反馈电路(22),采样电路(30),功率控制芯片(21),第一输出(27),第二输出(28),第一 半波整流电路(23),第二半波整流电路(24),第一滤波电路(25),第二滤波电路(26),变压器(20)和平衡控制电路(29)。 变压器被配置为经由第一半波整流器电路和第一滤波器电路串联地向第一输出提供低电压,并且经由第二半波整流器电路和第二滤波器电路串联地向第二输出提供高电压。 平衡控制电路被配置为控制第二输出端的电压。

    Multiplexed direct current regulation output circuit having balance control circuit
    6.
    发明申请
    Multiplexed direct current regulation output circuit having balance control circuit 有权
    具有平衡控制电路的多路直流调节输出电路

    公开(公告)号:US20080211312A1

    公开(公告)日:2008-09-04

    申请号:US12011697

    申请日:2008-01-28

    IPC分类号: H02J1/00 H02J3/00

    摘要: An exemplary multiplexed direct current regulation output circuit (2) includes a feedback circuit (22), a sampling circuit (30), a power control chip (21), a first output (27), a second output (28), a first half wave rectifier circuit (23), a second half wave rectifier circuit (24), a first filter circuit (25), a second filter circuit (26), a transformer (20), and a balance control circuit (29). The transformer is configured to provide low voltages to the first output via the first half wave rectifier circuit and the first filter circuit in series, and provide high voltages to the second output via the second half wave rectifier circuit and the second filter circuit in series. The balance control circuit is configured to control a voltage at the second output.

    摘要翻译: 示例性的多路复用直流调节输出电路(2)包括反馈电路(22),采样电路(30),功率控制芯片(21),第一输出(27),第二输出(28),第一 半波整流电路(23),第二半波整流电路(24),第一滤波电路(25),第二滤波电路(26),变压器(20)和平衡控制电路(29)。 变压器被配置为经由第一半波整流器电路和第一滤波器电路串联地向第一输出提供低电压,并且经由第二半波整流器电路和第二滤波器电路串联地向第二输出提供高电压。 平衡控制电路被配置为控制第二输出端的电压。

    Multi-output switching power supply having voltage limiting circuit
    7.
    发明申请
    Multi-output switching power supply having voltage limiting circuit 审中-公开
    具有电压限制电路的多输出开关电源

    公开(公告)号:US20080111807A1

    公开(公告)日:2008-05-15

    申请号:US11985359

    申请日:2007-11-13

    IPC分类号: G09G5/00

    摘要: An exemplary multi-output switching power supply (2) includes a switching power supply controller (21) for generating a pulse signal; a transformer device (20) for providing a first and a second AC voltages according to the pulse signal; a first half wave rectifier (23) and a first filter circuit (25) connected in series for transforming the first AC voltage to a first DC voltage; a second half wave rectifier (24) and a second filter circuit (26) connected in series for transforming the second AC voltage to a second DC voltage; a first output (27) for providing the first DC voltage to a first load circuit (210); a feedback circuit configured for generating a feedback signal according to the first DC voltage and the second DC voltage, and providing the feedback signal to the switching power supply controller; and a voltage limiting circuit (29) connected between the first output and ground.

    摘要翻译: 示例性多输出开关电源(2)包括用于产生脉冲信号的开关电源控制器(21) 变压器装置(20),用于根据所述脉冲信号提供第一和第二AC电压; 串联连接的第一半波整流器(23)和第一滤波电路(25),用于将第一AC电压变换为第一DC电压; 串联连接的第二半波整流器(24)和第二滤波电路(26),用于将第二交流电压变换为第二直流电压; 用于向第一负载电路(210)提供第一DC电压的第一输出(27); 反馈电路,被配置为根据第一DC电压和第二DC电压产生反馈信号,并将反馈信号提供给开关电源控制器; 以及连接在第一输出和地之间的限压电路(29)。

    Direct current to direct current converter with single ended transformer and pulse reverse circuit
    8.
    发明授权
    Direct current to direct current converter with single ended transformer and pulse reverse circuit 有权
    直流电流转换器与单端变压器和脉冲反向电路

    公开(公告)号:US07773391B2

    公开(公告)日:2010-08-10

    申请号:US11824836

    申请日:2007-07-02

    IPC分类号: H02M3/338

    CPC分类号: H02M3/33507

    摘要: An exemplary DC to DC converter (200) includes a first DC input (210) connected to a first DC power supply; a second DC input (220) connected to a second DC power supply; a transformer (230) including a primary winding (231), a sub-primary winding (232), and a secondary winding (233) for outputting a AC voltage; a pulse reverse circuit (260) including an input for receiving a square pulse and an output for providing the reverse square pulse; a first switch transistor (240) including a source connected to ground, a drain connected to the first DC input via the primary winding, and a gate connected to the output of the pulse reverse circuit; a second switch transistor (250) including a source connected to ground, a drain connected to ground via the sub-primary winding and a capacitor in series, and a gate connected to the output of the pulse reverse circuit.

    摘要翻译: 示例性DC-DC转换器(200)包括连接到第一DC电源的第一DC输入(210) 连接到第二DC电源的第二DC输入端(220); 包括初级绕组(231),次级绕组(232)和用于输出AC电压的次级绕组(233)的变压器(230); 包括用于接收平方脉冲的输入端和用于提供反方波脉冲的输出端的脉冲反向电路(260); 第一开关晶体管(240),包括连接到地的源极,经由初级绕组连接到第一DC输入的漏极和连接到脉冲反向电路的输出的栅极; 第二开关晶体管(250),其包括连接到地的源极,经由次级绕组连接到地的漏极和串联的电容器,以及连接到脉冲反向电路的输出的栅极。

    Switching power supply circuit having soft start circuit
    9.
    发明申请
    Switching power supply circuit having soft start circuit 审中-公开
    具有软启动电路的开关电源电路

    公开(公告)号:US20080252281A1

    公开(公告)日:2008-10-16

    申请号:US11906451

    申请日:2007-10-01

    IPC分类号: G05F1/00

    CPC分类号: H02M1/36

    摘要: An exemplary switching power supply circuit includes at least a power input terminal, a power control chip, and a soft start circuit. The power input terminal is configured for receiving an operating voltage applied to the switching power supply circuit, and the power control chip is configured for modulating a pulse width of an output current of an optical coupler in the soft start circuit to gain a pulse width voltage of the switching power supply circuit. The soft start circuit includes a first resistor, a second resistor, a capacitor, and a transistor performing an amplifying function.

    摘要翻译: 示例性开关电源电路至少包括电源输入端子,功率控制芯片和软启动电路。 电源输入端子被配置为接收施加到开关电源电路的工作电压,并且功率控制芯片被配置为用于调制软启动电路中的光耦合器的输出电流的脉冲宽度以获得脉冲宽度电压 的开关电源电路。 软启动电路包括第一电阻器,第二电阻器,电容器和执行放大功能的晶体管。

    Multi-output switching power supply having voltage limiting circuit
    10.
    发明申请
    Multi-output switching power supply having voltage limiting circuit 审中-公开
    具有电压限制电路的多输出开关电源

    公开(公告)号:US20080117654A1

    公开(公告)日:2008-05-22

    申请号:US11986378

    申请日:2007-11-21

    IPC分类号: H02M3/335

    CPC分类号: H02M3/33561

    摘要: An exemplary multi-output switching power supply (2) includes: a switching power supply controller (21) for generating a pulse signal; a transformer device (20) for providing a first AC voltage and a second AC voltage according to the pulse signal; a first regulation circuit (23, 25) for transforming the first AC voltage into a first DC voltage; a second regulation circuit (24, 26) for transforming the second AC voltage into a second DC voltage; a first output (27) and a second output (28) for respectively providing the first DC voltage and second DC voltage to a heavy load and a light load; a sampling circuit and a feedback circuit configured for generating a feedback signal according to the first DC voltage and the second DC voltage and providing the feedback signal to the switching power supply controller, and a voltage limiting circuit (29) connected between the first and second outputs.

    摘要翻译: 示例性多输出开关电源(2)包括:用于产生脉冲信号的开关电源控制器(21); 变压器装置(20),用于根据脉冲信号提供第一AC电压和第二AC电压; 用于将所述第一AC电压变换为第一DC电压的第一调节电路(23,25); 用于将所述第二AC电压变换为第二DC电压的第二调节电路(24,26); 第一输出(27)和第二输出(28),用于分别向重负载和轻负载提供第一直流电压和第二直流电压; 采样电路和反馈电路,被配置为根据第一DC电压和第二DC电压产生反馈信号,并将反馈信号提供给开关电源控制器;以及电压限制电路(29),其连接在第一和第二 输出。