Switched mode converter with low-voltage linear mode
First Claim
1. A power stage for producing an output voltage to a load, comprising:
- a power converter comprising;
a power inductor;
a plurality of switches arranged to sequentially operate in a plurality of switch configurations; and
an output for producing the output voltage comprising a first output terminal and a second output terminal, wherein a first switch of the plurality of switches is coupled to the first output terminal and a second switch of the plurality of switches is coupled to the second output terminal;
a linear amplifier coupled to the output; and
a controller configured to;
in a linear amplifier mode of the power stage, enable the linear amplifier to transfer electrical energy from an input source of the power stage to the load in order to switch a polarity of the output voltage; and
in at least one mode of the power stage other than the linear amplifier mode, sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from the input source of the power stage to the load.
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Accused Products
Abstract
A power converter may include a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, an output for producing the output voltage, wherein a first switch is coupled to a first output terminal of the output and a second switch is coupled to a second output terminal of the output, and a linear amplifier coupled to the output. The controller may be configured to, in a linear amplifier mode of the power stage, enable the linear amplifier to transfer electrical energy from an input source of the power stage to the load, and in at least one mode of the power stage other than the linear amplifier mode, sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer the electrical energy from the input source to the load.
83 Citations
20 Claims
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1. A power stage for producing an output voltage to a load, comprising:
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a power converter comprising; a power inductor; a plurality of switches arranged to sequentially operate in a plurality of switch configurations; and an output for producing the output voltage comprising a first output terminal and a second output terminal, wherein a first switch of the plurality of switches is coupled to the first output terminal and a second switch of the plurality of switches is coupled to the second output terminal; a linear amplifier coupled to the output; and a controller configured to; in a linear amplifier mode of the power stage, enable the linear amplifier to transfer electrical energy from an input source of the power stage to the load in order to switch a polarity of the output voltage; and in at least one mode of the power stage other than the linear amplifier mode, sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from the input source of the power stage to the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for producing an output voltage to a load, comprising:
in a power converter comprising a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, and an output for producing the output voltage comprising a first output terminal and a second output terminal, wherein a first switch of the plurality of switches is coupled to the first output terminal and a second switch of the plurality of switches is coupled to the second output terminal; in a linear amplifier mode of a power stage, enabling a linear amplifier coupled to the output to transfer electrical energy from an input source of the power stage to the load in order to switch a polarity of the output voltage; and in at least one mode of the power stage other than the linear amplifier mode, sequentially applying switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from the input source of the power stage to the load. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification