Voltage converters and methods to use therewith
First Claim
1. A voltage regulator for converting an input voltage from an adapter to an output voltage, comprising:
- a PWM controller that generates a PWM signal for driving a power stage in accordance with an error signal; and
a feed forward loop including;
a comparator that compares an adapter current sense voltage, which is indicative of an adapter current, to an adapter current reference voltage to produce an adapter current error signal,a compensator that receives the adapter current error signal and outputs a compensated adapter current error signal, anda subtractor that subtracts the adapter current sense voltage, or a high pass filtered version thereof, from the compensated adapter current error signal to produce the error signal that is provided to the PWM controller.
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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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Citations
12 Claims
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1. A voltage regulator for converting an input voltage from an adapter to an output voltage, comprising:
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a PWM controller that generates a PWM signal for driving a power stage in accordance with an error signal; and a feed forward loop including; a comparator that compares an adapter current sense voltage, which is indicative of an adapter current, to an adapter current reference voltage to produce an adapter current error signal, a compensator that receives the adapter current error signal and outputs a compensated adapter current error signal, and a subtractor that subtracts the adapter current sense voltage, or a high pass filtered version thereof, from the compensated adapter current error signal to produce the error signal that is provided to the PWM controller. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A voltage regulator for converting an input voltage from an adapter to an output voltage, comprising:
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a PWM controller that generates a PWM signal for driving a power stage in accordance with an error signal; and a feed forward loop, including; a comparator that compares an adapter current sense voltage, which is indicative of an adapter current, to an adapter current reference voltage to produce an adapter current error signal, a compensator that receives the adapter current error signal and outputs a compensated adapter current error signal, and an adder that adds a signal representative of the input voltage, or a high pass filtered version thereof, to the compensated adapter current error signal to produce the error signal that is provided to the PWM controller. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification