公开(公告)号：US20140210366A1

公开(公告)日：2014-07-31

申请号：US13752294

申请日：2013-01-28

Applicant: QUALCOMM Incorporated

Inventor： Narendra S. Mehta ,  Sandeep Chaman Dhar ,  Todd R. Sutton

IPC: H02M3/158 ,  H05B33/08

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。