POWER SUPPLY CIRCUIT
    1.
    发明申请
    POWER SUPPLY CIRCUIT 有权
    电源电路

    公开(公告)号:US20090174345A1

    公开(公告)日:2009-07-09

    申请号:US12055768

    申请日:2008-03-26

    IPC分类号: H05B41/36

    摘要: A power supply circuit is proposed for supplying current to a pair of white LEDs connected in series. The circuit comprises a DC-DC power converter, with a charge pump coupled to the output of the DC-DC power converter. A super capacitor is coupled to the charge pump to be charged to a voltage on top of the converter output in a first mode of operation. The super capacitor is discharged through the pair of LEDs during a second mode of operation. A control stage is provided for switching between the first mode of operation and the second mode of operation.

    摘要翻译: 提出了一种电源电路,用于向串联连接的一对白色LED提供电流。 该电路包括DC-DC电力转换器,其中电荷泵耦合到DC-DC电力转换器的输出端。 超级电容器耦合到电荷泵,以在第一操作模式下被充电到转换器输出端上的电压。 在第二操作模式期间,超级电容器通过一对LED放电。 提供控制级用于在第一操作模式和第二操作模式之间切换。

    Power supply circuit
    4.
    发明授权
    Power supply circuit 有权
    电源电路

    公开(公告)号:US07973487B2

    公开(公告)日:2011-07-05

    申请号:US12055768

    申请日:2008-03-26

    IPC分类号: H05B37/02

    摘要: A power supply circuit is proposed for supplying current to a pair of white LEDs connected in series. The circuit comprises a DC-DC power converter, with a charge pump coupled to the output of the DC-DC power converter. A super capacitor is coupled to the charge pump to be charged to a voltage on top of the converter output in a first mode of operation. The super capacitor is discharged through the pair of LEDs during a second mode of operation. A control stage is provided for switching between the first mode of operation and the second mode of operation.

    摘要翻译: 提出了一种电源电路,用于向串联连接的一对白色LED提供电流。 该电路包括DC-DC电力转换器,其中电荷泵耦合到DC-DC电力转换器的输出端。 超级电容器耦合到电荷泵,以在第一操作模式下被充电到转换器输出端上的电压。 在第二操作模式期间,超级电容器通过一对LED放电。 提供控制级用于在第一操作模式和第二操作模式之间切换。

    Area-efficient compensation circuit and method for voltage mode switching battery charger
    5.
    发明申请
    Area-efficient compensation circuit and method for voltage mode switching battery charger 审中-公开
    电压模式切换电池充电器的区域效率补偿电路和方法

    公开(公告)号:US20050134220A1

    公开(公告)日:2005-06-23

    申请号:US10995742

    申请日:2004-11-22

    IPC分类号: H02J7/00

    CPC分类号: H02J7/0072 H02J7/0052

    摘要: A feedback-controlled battery charger circuit (500) provides, alternatively, constant current and constant voltage to a battery (328) being charged. Current and voltage at the charger output (326) are sensed in sensing elements (308) and compared to preset reference values from reference generators for current (330) and voltage (332), thus generating error signals for both current and voltage. These error signals are amplified in separate amplifiers (530, 534); then, depending on battery voltage, one of the amplified error signals is automatically selected by a signal selector (540). The selected error signal is applied to a single compensation amplifier (554) with reactive feedback loop (552, 556); the output of the compensation amplifier with feedback (504) then controls the output current or voltage of the output stage (306). This output stage is a voltage controlled current source. The output of this voltage controlled current source is connected through an output filter (318) and sensing elements (308) to the battery (328) being charged.

    摘要翻译: 反馈控制的电池充电器电路(500)可替代地向被充电的电池(328)提供恒定电流和恒定电压。 在感测元件(308)中感测充电器输出端(326)处的电流和电压,并将其与来自参考发生器的预设参考值(对于电流(330)和电压(332)进行比较),从而产生电流和电压两者的误差信号。 这些误差信号在单独的放大器(530,534)中被放大; 那么根据电池电压,一个放大的误差信号由信号选择器(540)自动选择。 选择的误差信号被施加到具有反应反馈回路(552,556)的单个补偿放大器(554); 具有反馈(504)的补偿放大器的输出然后控制输出级(306)的输出电流或电压。 该输出级是电压控制电流源。 该电压控制电流源的输出端通过输出滤波器(318)和感测元件(308)连接到被充电的电池(328)。