DC-to-DC converter with improved transient response
AssigneeO2Micro International Limited
InventorLaszlo Lipcsei
Life of this patent
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Abstract
A DC-to-DC converter includes a comparator, a driver, and a pair of switches. The comparator compares the output voltage with a reference voltage signal and generates a PWM signal. The driver drives the switches so as to force the output voltage to follow the reference signal. In a multiphase architecture, two or more such converter circuits are incorporated to minimize the output voltage ripple and further reduce the recovery time. In a two-phase architecture, two reference signals are phase-shifted by 180 degrees. In an N-phase architecture, the reference signals are phase-shifted by 360/N degrees.
Claims19
A DC-DC converter comprising:
- a comparator configured to compare a first signal representative of an output voltage of said DC-DC converter with a periodic reference signal having a DC offset determined by a DC reference voltage source and to provide an output signal that drives said output voltage of said DC-DC converter towards a pre-established value.
A DC to DC converter comprising:
- a means for comparing a first signal representative of an output voltage of said DC-DC converter with a periodic reference signal having a DC offset determined by a DC reference voltage source and providing an output signal that drives said output voltage of said DC-DC converter towards a pre-established value.
A method of controlling an output voltage of a DC to DC converter, said method comprising:
- comparing a first signal representative of an output voltage of said DC-DC converter with a periodic reference signal having a DC offset determined by a DC reference voltage source;
- providing an output signal in response to said comparing operation;
- and
- driving an output voltage of said DC-DC converter towards a pre-established value in response to said output signal.
An electronic device comprising:
- a DC-DC converter, said DC-DC converter comprising:
- a comparator configured to compare first signal representative of an output voltage with a periodic reference signal having a DC offset determined by a DC reference voltage source and to provide an output signal that drives an output voltage of said DC-DC converter towards a pre-established value.
Dependencies are inferred from the claim text.