Patent · US Active

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

US9985522B1 · kind B1 · utility

8Cited by

2References

24Claims

0Family size

Assignee

NXP USA, Inc. · US

Inventors

Stefan G. Luft · Munich, DE
Andreas Roth · Gunzenhausen, DE
Hubert M. Bode · Haar, DE

Key dates

Filing date	Sep 13, 2017
Grant date	May 29, 2018
Priority date	—
Expiry date	Sep 13, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH02M1/0003
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.