Ripple suppression in multi-phase buck converters
AssigneeMaxLinear, Inc.
InventorsCurtis Ling, Shantha Murthy Prem Swaroop, Vinit Jayaraj
Life of this patent
Estimating the term…
Abstract
Methods and systems for ripple suppression in multi-phase buck converters may comprise a buck converter for providing an output voltage with controlled ripple current. The buck converter may include one or more main buck converter stages and one or more suppression buck converter stages coupled with the one or more main buck converter stages. The one or more suppression buck converter stages may provide suppression currents to reduce ripple currents generated in the one or main buck converter stages.
Claims17
A system for power control, the system comprising:
- a multiphase buck converter for providing an output DC voltage with controlled ripple current, the buck converter comprising:
- one or more main buck converter stages;
- and
- one or more suppression buck converter stages coupled with the one or more main buck converter stages, the one or more suppression buck converter stages being operable to provide a suppression current to reduce ripple currents generated in the one or more main buck converter stages, the suppression current being configured by a particular supply voltage,
- wherein each of the one or more main buck converter stages and each of the one or more suppression buck converter stages comprises a stacked transistor pair with an inductor at an output.
A method for power control, comprising:
- in a buck converter comprising one or more main buck converter stages and one or more suppression buck converter stages coupled with the one or more main buck converter stages:
- providing an output voltage with ripple current, wherein the one or more suppression buck converter stages provides suppression currents to cancel ripple currents generated in the one or main buck converters stages;
- and
- generating a second supply voltage using a supply voltage buck converter that is biased by a first supply voltage, the suppression current being configured by the second supply voltage,
- wherein each of the one or more main buck converter stages and each of the one or more suppression buck converter stages comprises a stacked transistor pair with an inductor at an output.
A system, comprising:
- a buck converter for providing an output voltage with controlled ripple current, the buck converter comprising:
- one or more main buck converter stages;
- a suppression digital-to-analog-converter (DAC) coupled with the one or more main buck converter stages, the suppression DAC being operable to provide suppression current to reduce ripple currents generated in the one or main buck converter stages, the suppression current being configured by a particular supply voltage;
- and
- a digital signal processor (DSP) operable to provide a control signal to the suppression DAC,
- wherein each of the one or more main buck converter stages comprises a stacked transistor pair with an inductor at an output.
Dependencies are inferred from the claim text.