Patent ID: 9577519
Date: 2017-02-21
CPC Classifications: H02M

Claim:
1. Feedback circuitry for a power converter, the feedback circuitry comprising: a first resistor coupled to a first node between a high switch and a low switch; a first capacitor in series with the first resistor, the first capacitor coupled to a second node; a first comparator having a positive terminal connected between the first resistor and the first capacitor and a negative terminal connected to a third node, the first comparator configured to compare a voltage at the positive terminal to a voltage at the negative terminal, wherein the feedback circuitry is configured to generate a ramp waveform having an amplitude based on a time constant of the first resistor and the first capacitor and provide the ramp waveform to the positive terminal of the first comparator; and a second capacitor in parallel with the first capacitor; and a switch in series with the second capacitor, the switch configured to close once per clock cycle.