Fast mode transitions in a power converter
AssigneeTexas Instruments Incorporated
InventorSrinivas Venkata VEERAMREDDI
Life of this patent
Estimating the term…
Abstract
Disclosed embodiments of a power converter include a power output stage for generating a first voltage output and an auxiliary power output stage for generating a second voltage output. The power converter further includes a pulse frequency modulation (PFM) controller for controlling the power output stage in response to the first voltage output generated by the power output stage during a first period of time in which the power output stage operates in a PFM mode, and a pulse width modulation (PWM) controller for controlling the auxiliary power output stage in response to the second voltage output generated by the auxiliary power output stage during a second period of time. At least a portion of the first period of time is concurrent with the second period of time.
Claims20
A converter comprising:
- a power output stage configured to generate a first voltage output;
- an auxiliary power output stage configured to generate a second voltage output;
- a pulse frequency modulation (PFM) controller configured to control the power output stage in response to the first voltage output generated by the power output stage during a first period of time in which the power output stage operates in a PFM mode;
- and
- a pulse width modulation (PWM) controller configured to control the auxiliary power output stage in response to the second voltage output generated by the auxiliary power output stage during a second period of time, wherein at least a portion of the first period of time is concurrent with the second period of time.
A method comprising:
- controlling a power output stage in a pulse frequency modulation (PFM) mode during a first period of time;
- and
- controlling an auxiliary power output stage in a pulse width modulation (PWM) mode during a second period of time;
- wherein at least a portion of the first period of time overlaps with the second period of time.
A system comprising:
- an input/output (I/O) port for sending data in a transmit mode and for receiving data in a receive mode;
- and
- a power converter for supplying power to the input-output port, the power converter including:
- a power output stage for generating a first voltage output;
- an auxiliary power output stage for generating a second voltage output;
- a pulse frequency modulation (PFM) controller for controlling the power output stage in response to the first voltage output generated by the power output stage during a first period of time in which the I/O port operates in the receive mode;
- and
- a pulse width modulation (PWM) controller for controlling the auxiliary power output stage in response to the second voltage output generated by the auxiliary power output stage during a second period of time;
- wherein at least a portion of the first period of time is concurrent with the second period of time.
Dependencies are inferred from the claim text.