Abstract: An example apparatus to control a power stage circuit includes: programmable circuitry configured to: generate, in response to an instruction from an external controller, a pulse in a first local clock signal, the pulse in the first local clock signal generated when a fly capacitor in the power stage circuit has discharged for a discharge period that is less than a threshold amount of time; and generate a pulse in a second local clock signal after the fly capacitor has charged for a charge period, wherein a length of the charge period is based on the length of the discharge period.

Abstract: A battery charger circuit includes a linear charging control circuit. The linear charging control circuit is coupled between an input terminal and a battery terminal. The linear charging control circuit is configured to apply a charging voltage from the input terminal to the battery terminal, and in a fast charging phase, cause the charging voltage to track a battery voltage while drawing a constant charging current.