CPC H02M 3/158 (2013.01) [H02M 1/08 (2013.01); H02M 1/0006 (2021.05); H02M 1/0025 (2021.05)] | 20 Claims |
16. A system comprising:
an inductor defining a first lead and a second lead;
a first electrically-controlled switch defining a current input coupled to an input voltage, a current output coupled to the first lead, and a control input;
a second electrically-controlled switch defining a current input coupled to a ground reference, a current output coupled to the first lead, and a control input;
an output capacitor having a first connection coupled to the second lead of the inductor, and a second connection coupled to the ground reference;
a load coupled to the second lead of the inductor;
a driver circuit comprising:
an on-time controller defining a set input and a compensation input, the on-time controller coupled to the control input of the first electrically-controlled switch and the control input of the second electrically-controlled switch;
a voltage controller coupled to the set input, the voltage controller configured to assert the set input at a switching frequency, the switching frequency based on a voltage difference between an output voltage and a setpoint voltage;
the on-time controller is configured to, responsive to assertion of the set input, place the inductor in a charge mode by making the first electrically-controlled switch conductive and the second electrically-controlled switch non-conductive;
the on-time controller is configured to maintain the charge mode for an on-time, the on-time having a duration based on a compensation signal received on the compensation input; and
a bypass controller coupled to the compensation input, the bypass controller configured to drive the compensation signal to the on-time controller, the compensation signal proportional to the voltage difference.
|