公开(公告)号：WO2014116823A3

公开(公告)日：2015-04-16

申请号：PCT/US2014012744

申请日：2014-01-23

Applicant: QUALCOMM INC

Inventor： MEHTA NARENDRA S ,  DHAR SANDEEP CHAMAN ,  SUTTON TODD R

IPC: H02M3/158

CPC classification number: H02M3/158 ,  H05B33/0815 ,  H05B33/0842 ,  Y02B20/346

Abstract: A method and apparatus for a boost converter topology for low battery voltage support. In the method, an input voltage is boosted by closing first through third switches and then opening a fourth switch to charge a capacitor. The first and second switches are then opened. The voltage is then doubled by closing the third and fourth switches to discharge the first capacitor into a second capacitor and charging a third capacitor. A further embodiment provides an additional method for selectively boosting an input voltage to an electronic device. The method first characterizes the efficiency of a circuit, and then determines a crossover point for a ratio of output voltage to input voltage, and then enabling or disabling a voltage boost converter based on the crossover point.

Abstract translation: 一种用于低电池电压支持的升压转换器拓扑的方法和装置。 在该方法中，通过关闭第一至第三开关然后打开第四开关来对电容器充电，来提高输入电压。 然后打开第一和第二开关。 然后通过闭合第三和第四开关来将电压加倍，以将第一电容器放电到第二电容器中并对第三电容器充电。 另一实施例提供了用于选择性地将输入电压升压到电子设备的附加方法。 该方法首先表征电路的效率，然后确定输出电压与输入电压的比率的交叉点，然后基于交叉点启用或禁用升压转换器。

公开(公告)号：WO2014150283A2

公开(公告)日：2014-09-25

申请号：PCT/US2014022827

申请日：2014-03-10

Applicant: QUALCOMM INC

Inventor： MEHTA NARENDRA SINGH ,  ROSOLOWSKI CHRIS M ,  DHAR SANDEEP CHAMAN ,  SUTTON TODD R

IPC: H02M1/00

CPC classification number: H02J7/0042 ,  H02J7/0055 ,  H02J2007/0059 ,  H02M3/1582 ,  H02M3/1584 ,  H02M2001/0067 ,  H02M2001/008

Abstract: An electronic device is described. The electronic device includes a first port. The electronic device also includes a second port. The electronic device further includes a multiphase charger. The multiphase charger includes a first buck. The multiphase charger also includes a second buck. The multiphase charger further includes a first port switch. The multiphase charger also includes a second port switch. The multiphase charger further includes a reverse boost switch. The multiphase charger also includes a multiphase switch.

Abstract translation: 描述电子设备。 电子设备包括第一端口。 电子设备还包括第二端口。 电子设备还包括多相充电器。 多相充电器包括一个第一降压。 多相充电器还包括第二降压。 多相充电器还包括第一端口开关。 多相充电器还包括第二端口开关。 多相充电器还包括反向升压开关。 多相充电器还包括多相开关。

公开(公告)号：WO2014043571A3

公开(公告)日：2014-07-24

申请号：PCT/US2013059804

申请日：2013-09-13

Applicant: QUALCOMM INC

Inventor： GUAN HUA ,  DHAR SANDEEP CHAMAN ,  SHI CHUNLEI

IPC: H05B33/08

CPC classification number: H05B33/0848 ,  H05B33/0827

Abstract: A method and apparatus for optimizing a light emitting diode (LED) operation range is provided. The method comprises the steps of: turning on at least one LED; and then measuring an anode voltage of the at least one LED; then measuring a cathode voltage of the at least one LED. Once the measurements are completed, a forward voltage of the at least one LED is calculated. After the calculation, the at least one LED is turned off and a voltage overhead threshold is set for that LED based on the measured anode and cathode voltages.

Abstract translation: 提供了一种用于优化发光二极管（LED）操作范围的方法和设备。 该方法包括以下步骤：打开至少一个LED; 然后测量所述至少一个LED的阳极电压; 然后测量所述至少一个LED的阴极电压。 一旦完成测量，就计算出至少一个LED的正向电压。 在计算之后，基于所测量的阳极和阴极电压，关闭该至少一个LED并为该LED设置电压开销阈值。