Method and apparatus for implementing a programmable high resolution ramp signal in digitally controlled power converters

摘要

A system and method for controlling a power converter includes a digital-to-analog converter (DAC) and ramp generator for generating a reference current command. The DAC is configured to decrement (or increment) to a next state after a fixed number of clock pulses have occurred. The reference current command controls an output of the power converter. Means are provided for delaying an output of the DAC for a number of clock pulses less than the fixed number to increase a resolution of the DAC.

主权项

1. A system for controlling a power converter, comprising:
a digital-to-analog converter (DAC) the DAC being configured to clock to a next state after a fixed number of clock pulses have occurred; a ramp generator to generate a reference current command, the reference current command to control an output of the power converter; and a ramp synchronization selection circuit to delay an output of the DAC for a number of clock pulses less than the fixed number to increase a resolution of the DAC.