Abstract: Various embodiments of a two-stage on-board battery charger that can generate a wide range of output voltages is described herein. Generally, the battery charger employs a first stage buck and boost Power Factor Correction (PFC) converter, and a second stage DC-DC converter. The buck and boost PFC converter is capable of generating variable intermediate DC-link voltages which allow the on-board battery charger to efficiently generate the wider range of output voltages.

Abstract: Various embodiments of a two-stage on-board battery charger that can generate a wide range of output voltages is described herein. Generally, the battery charger employs a first stage buck and boost Power Factor Correction (PFC) converter, and a second stage DC-DC converter. The buck and boost PFC converter is capable of generating variable intermediate DC-link voltages which allow the on-board battery charger to efficiently generate the wider range of output voltages.

Abstract: A method of operating a DC-DC converter includes providing a first error signal to a frequency controller, the first error signal derived from a difference between a discontinuous conduction mode input current and a sinusoidal current reference, providing a second error signal to a duty cycle controller, the second error signal derived from a difference between an output signal and an output reference signal, and combining a frequency signal from the frequency controller and a duty cycle signal from the duty cycle controller to produce a complimentary pulse train for driving the DC-DC converter to both control an input power factor and regulate the output signal.