Directly amplified ripple tracking control scheme for multiphase dc-dc converter
AssigneeTexas Instruments Incorporated
InventorJiwei Fan
Life of this patent
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Abstract
A controller for a multiphase power converter has a plurality of DC to DC converters coupled in parallel between a voltage source and a single output terminal is provided. The controller includes a voltage sensing circuit coupled to the output terminal. An internal pulse generating circuit is couplable to the voltage sensing circuit for generating an internal pseudo-pulse width modulated signal. An ON time signal distribution circuit is couplable to an output of the internal pulse generating circuit and couplable to driver circuit for driving each of the plurality of DC to DC converters. A multiphase power converter and method also disclosed.
Claims20
A multiphase power converter comprising:
- a plurality of DC to DC converters coupled in parallel and having a single output terminal couplable to a load;
- a voltage sensing circuit coupled to the output terminal;
- an internal pulse generating circuit coupled to the voltage sensing circuit for generating a pseudo-pulse width modulated signal;
- and ON time signal distribution circuit coupled to an output of the pulse generating circuit;
- and
- a driver circuit coupled to the ON time signal distribution circuit for driving each of the plurality of DC to DC converters.
A controller for a multiphase power converter comprising a plurality of DC to DC converters coupled in parallel between a voltage source and a single output terminal, the controller comprising:
- a voltage sensing circuit coupled to the output terminal;
- a pulse generating circuit couplable to the voltage sensing circuit for generating a pseudo-pulse width modulated signal;
- an ON time signal distribution circuit couplable to an output of the pulse generating circuit and couplable to driver circuit for driving each of the plurality of DC to DC converters.
A method of driving a plurality of parallel connected DC to DC converters comprising:
- sensing a voltage across an output of the converters;
- generating a pseudo-pulse width modulated signal;
- distributing a constant ON time signal to each of the plurality of DC to DC converters;
- driving each of the plurality of DC to DC converters with the constant ON time signal.
Dependencies are inferred from the claim text.