公开(公告)号：US09748788B2

公开(公告)日：2017-08-29

申请号：US14856947

申请日：2015-09-17

Applicant: QUALCOMM Incorporated

Inventor： Christian Sporck ,  VaraPrasad Arikatla ,  Shadi Hawawini ,  Steve Hawley ,  Thomas O'Brien ,  Seema Kumar ,  Aaron Melgar

IPC: H02J7/00

CPC classification number: H02J7/007 ,  H02J7/00 ,  H02J7/0052 ,  H02J7/0055 ,  H02J7/008 ,  H02J7/0091 ,  H02J7/0093 ,  H02J7/022 ,  H02J7/047 ,  H02J2007/0059 ,  H02J2007/0062 ,  H02M3/156

Abstract: The present disclosure includes a method of charging a battery. In one embodiment, the method comprises receiving, in a battery charging circuit on an electronic device, an input voltage having a first voltage value from an external power source. The battery charger is configured to produce a charge current having a first current value into the battery. The input current limit and/or duty cycle of the charger is monitored. Control signals may be generated to increase the first voltage value of the input voltage if either (i) the input current limit is activated or (ii) the duty cycle reaches a maximum duty cycle. The charger also receives signals indicating a temperature inside the electronic device and generates control signals to decrease the value of the input voltage when the temperature increases above a threshold temperature.

公开(公告)号：US20150362944A1

公开(公告)日：2015-12-17

申请号：US14303883

申请日：2014-06-13

Applicant: QUALCOMM Incorporated

Inventor： Christian Sporck ,  Shadi Hawawini ,  Thomas O'Brien

IPC: G05F5/00

CPC classification number: G05F5/00 ,  H02J5/00 ,  H02J7/02 ,  H02M1/00 ,  H02M2001/0022

Abstract: The present disclosure includes circuits and methods for cable resistance compensation. In one embodiment, the present disclosure includes a circuit comprising a regulator coupled to receive an input voltage and an input current from an external power source across a cable, a voltage sensor coupled to sense the input voltage, a collapse detector coupled to detect whether or not the input voltage is below a first value, and a current limit circuit to control a maximum current in the regulator. The current limit circuit is reconfigured to a plurality of current limit values and the collapse detector detects if the input voltage from the external power source collapses below the first value at the plurality of current limit values. The voltage sensor measures different voltages at different input currents, and in accordance therewith, reduces collapse voltage value to compensate for a voltage drop caused by a resistance of the cable.

Abstract translation: 本公开包括用于电缆电阻补偿的电路和方法。 在一个实施例中，本发明包括一个电路，该电路包括耦合以接收来自跨电缆的外部电源的输入电压和输入电流的调节器，耦合以感测输入电压的电压传感器，耦合以检测是否或 不是输入电压低于第一值，而限流电路控制调节器中的最大电流。 电流限制电路被重新配置为多个电流限制值，并且塌陷检测器检测来自外部电源的输入电压是否在多个电流极限值下崩溃低于第一值。 电压传感器测量不同输入电流下的不同电压，并根据此减少塌陷电压值，以补偿由电缆电阻引起的电压降。