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.

Abstract: A battery charging circuit comprises two or more charging circuits, each capable of charging a battery. The charging outputs of the charging circuits are connected together and can be connected to a battery to provide fast charging of the battery. The charging circuits can be configured so that they do not adversely interfere with each other during battery charging.

Abstract: In one embodiment, a fuel gauge system is described that comprises two or more battery chargers on different integrated circuits (ICs) coupled in parallel to a battery for charging the battery. Each battery charger IC generates a current signal indicative of current generated by said each battery charger IC into the same battery. A fuel gauge is responsible for accurately reporting the battery state of charge, based on a combination of voltage, current, and temperature information.

Abstract: A multi-phase charging circuit comprises a device that can be configured for master mode operation or slave mode operation. In master mode operation, the device generates a control signal and a clock signal to control operation of a switching circuit for generating charging current. In slave mode operation, the device receives externally generated control and clock signals to control operation of its switching circuit.

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: A battery charging circuit comprises two or more charging circuits, each capable of charging a battery. The charging outputs of the charging circuits are connected together and can be connected to a battery to provide fast charging of the battery. The charging circuits can be configured so that they do not adversely interfere with each other during battery charging.