Abstract: In one embodiment, a method for sensing an output fault condition is disclosed. The method includes monitoring an error signal that indicates an output fault condition, and monitoring an input signal having a duration. An error flag is set if a fast switching mode is detected and if the error signal is asserted within a specified time interval during the input signal duration.

Abstract: Circuit and method for controlling a high bridge circuit with increased efficiency is disclosed. Circuitry is provided outputting gating signals to a high side driver and a low side driver responsive to a time varying input signal. A frequency measurement circuit determines a high speed mode when the input signal is at a frequency above a threshold, and the gating signal to the high side driver is inhibited. When the input signal frequency is below the threshold, the low side driver and the high side driver gating signals switch alternately. In an exemplary implementation, the frequency measurement circuit is provided as two counters outputting signals to a decision circuit which controls the half bridge circuit. Methods are provided for efficiently providing gating signals to the drivers of a half bridge circuit based upon the frequency of the input signal.

Abstract: In one embodiment, a method for sensing an output fault condition is disclosed. The method includes monitoring an error signal that indicates an output fault condition, and monitoring an input signal having a duration. An error flag is set if a fast switching mode is detected and if the error signal is asserted within a specified time interval during the input signal duration.

Abstract: Circuit and method for controlling a high bridge circuit with increased efficiency is disclosed. Circuitry is provided outputting gating signals to a high side driver and a low side driver responsive to a time varying input signal. A frequency measurement circuit determines a high speed mode when the input signal is at a frequency above a threshold, and the gating signal to the high side driver is inhibited. When the input signal frequency is below the threshold, the low side driver and the high side driver gating signals switch alternately. In an exemplary implementation, the frequency measurement circuit is provided as two counters outputting signals to a decision circuit which controls the half bridge circuit. Methods are provided for efficiently providing gating signals to the drivers of a half bridge circuit based upon the frequency of the input signal.