VOLTAGE CONVERTERS AND METHODS FOR USE THEREWITH
First Claim
1. A voltage regulator, comprising:
- a PWM controller that generates a PWM signal for driving a power stage for converting an input voltage from an adapter to an output voltage;
an input LC filter that receives an adapter voltage from the adapter and in dependence thereon produces the input voltage;
an output LC filter that is coupled to an output of the power stage and outputs the output voltage for use in at least one of powering a load or charging a battery; and
a first loop that substantially nulls out both a first complex double pole caused by the input LC filter and a second complex double pole caused by the output LC filter.
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Accused Products
Abstract
A voltage error signal is provided to a PWM controller of a voltage regular and used to produce a PWM signal that drives a power stage of the regulator. When operating in an adapter current limit regulation mode, an adapter current sense voltage, indicative of an adapter current, is compared to an adapter current reference voltage to produce an adapter current error signal. A compensator receives the adapter current error signal and outputs a compensated adapter current error signal. The adapter current sense voltage, or a high pass filtered version thereof, is subtracted from the compensated adapter current error signal to produce the voltage error signal provided to the PWM controller. Alternatively, an input voltage, or a high pass filtered version thereof, is added to the compensated adapter current error signal to produce the voltage error signal.
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18 Claims
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1. A voltage regulator, comprising:
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a PWM controller that generates a PWM signal for driving a power stage for converting an input voltage from an adapter to an output voltage; an input LC filter that receives an adapter voltage from the adapter and in dependence thereon produces the input voltage; an output LC filter that is coupled to an output of the power stage and outputs the output voltage for use in at least one of powering a load or charging a battery; and a first loop that substantially nulls out both a first complex double pole caused by the input LC filter and a second complex double pole caused by the output LC filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for operating a voltage regulator, comprising:
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generating a PWM signal for driving a power stage for converting an input voltage from an adapter to an output voltage; receiving, by an input LC filter, an adapter voltage from the adapter and in dependence thereon produces the input voltage; outputting, by an output LC filter that is coupled to an output of the power stage, the output voltage for use in at least one of powering a load or charging a battery; substantially nulling out, by a first loop, both a first complex double pole caused by the input LC filter and a second complex double pole caused by the output LC filter; regulating, by a second loop, an adapter current from the adapter; and feeding forward, by the second loop, the first complex double pole caused by the input LC filter. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A voltage regulator, comprising:
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a PWM controller that generates a PWM signal for driving a power stage for converting an input voltage from an adapter to an output voltage in accordance with an error signal; an input LC filter that receives an adapter voltage from the adapter and in dependence thereon produces the input voltage; an output LC filter that is coupled to an output of the power stage and outputs the output voltage for use in at least one of powering a load or charging a battery; and a regulation mode selector that generates the error signal based on one of an adapter current sense input, an output voltage sense input and a battery current sense input. - View Dependent Claims (18)
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Specification