Nxp Usa, Inc.

Stefan G Luft

Hubert Martin Bode

Andreas Johann Roth

A method and system are provided for digitally controlling a switch mode power supply without using analog-to-digital converters by providing an SMPS output in feedback to first and second comparators along with upper and lower reference voltage thresholds to detect excursion counts at dedicated counters which identify how many times an SMPS output voltage exceeds the upper and lower reference voltage thresholds during each cycle of a fixed frequency PWM signal, where the excursion counts are evaluated with a non-linear multi-step digital control loop detection sequence to generate duty cycle adjustment instructions for controlling each duty cycle of the fixed frequency PWM signal.

Digital control algorithm using only two target voltage thresholds for generating a pulse width modulated signal driving the gate of a power MOS to implement a switch mode power supply

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Munich, Germany

Stefan G Luft