methods and apparatuses are disclosed for power conversion in fuzes for projectiles . fuze electronics in the projectile control detonation of the projectile . a rectifier converts pulses from a setter signal to a dc power source signal . a voltage monitor coupled to the power source signal generates a source voltage indicator and a current monitor coupled to the power source signal generates a source current indicator . a combiner generates a supplied power level indicator in response to a combination of the source voltage indicator and the source current indicator . a dc - dc converter uses the supplied power level indicator when converting the power source signal to a power output signal to adjust a current level of the power output for efficient charging of a charge storage device and delivery of power to the fuze electronics .