A DC/DC active clamp forward converter comprising: a power stage circuit that includes an input, an output, and a transformer with a core, the power stage circuit being configured to operate in a power transfer mode during which power is transferred from the input to the output and a reset mode during which flux density in the core of the transformer is reversed in polarity; a pulse generator circuit configured to generate pulses that regulate the output of the power stage circuit; a flux density monitor circuit configured to generate flux density information indicative of the flux density of the core of the transformer during both the power transfer mode and the reset mode; and power stage control logic configured to regulate the output of the power stage circuit based on the pulses and to prevent the core of the transformer from saturating based on the flux density information, wherein the pulse generator circuit is configured to: generate a maximum duty cycle pulse that terminates the power transfer phase when the duty cycle of the power transfer phase reaches or exceeds a pre-determined threshold, and/or to terminate the power transfer phase when current in the output of the power stage circuit reaches or exceeds a pre-determined amount; wherein the power stage control logic is configured to prevent the core from saturating during the flux reset phase by causing the flux reset phase to terminate when the flux density information indicates that the flux density has reached or exceeded a pre-determined threshold; and wherein the power stage circuit is configured to provide an active clamp reset, wherein the active clamp reset causes the flux density to reverse in polarity during the reset phase. a power stage circuit that includes an input, an output, and a transformer with a core, the power stage circuit being configured to operate in a power transfer mode during which power is transferred from the input to the output and a reset mode during which flux density in the core of the transformer is reversed in polarity; a pulse generator circuit configured to generate pulses that regulate the output of the power stage circuit; a flux density monitor circuit configured to generate flux density information indicative of the flux density of the core of the transformer during both the power transfer mode and the reset mode; and power stage control logic configured to regulate the output of the power stage circuit based on the pulses and to prevent the core of the transformer from saturating based on the flux density information, wherein the pulse generator circuit is configured to: generate a maximum duty cycle pulse that terminates the power transfer phase when the duty cycle of the power transfer phase reaches or exceeds a pre-determined threshold, and/or to terminate the power transfer phase when current in the output of the power stage circuit reaches or exceeds a pre-determined amount; generate a maximum duty cycle pulse that terminates the power transfer phase when the duty cycle of the power transfer phase reaches or exceeds a pre-determined threshold, and/or to terminate the power transfer phase when current in the output of the power stage circuit reaches or exceeds a pre-determined amount; wherein the power stage control logic is configured to prevent the core from saturating during the flux reset phase by causing the flux reset phase to terminate when the flux density information indicates that the flux density has reached or exceeded a pre-determined threshold; and wherein the power stage circuit is configured to provide an active clamp reset, wherein the active clamp reset causes the flux density to reverse in polarity during the reset phase.