POWER SUPPLY FOR LIMITED POWER SOURCES AND AUDIO AMPLIFIER USING POWER SUPPLY
First Claim
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1. A power supply comprising:
- a power input terminal for receiving an input power signal at a source voltage from a limited power source;
an energy storage element for storing energy;
a step-up converter coupled to the power input terminal to receive the input power signal and for providing a storage power signal to the energy storage element at a storage voltage, and wherein the step-up converter isolates the source voltage at the input terminal from the storage voltage at the energy storage element;
a power output terminal; and
wherein the energy storage element is coupled to the step-up converter for receiving power and wherein the energy storage element in coupled to the output terminal for providing an output power signal to a load.
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Abstract
A power supply for limited power sources and an audio amplifier using the power supply comprising power sources to provide an output power signal that can be used by load with a high peak to average power requirement ratio. When such power sources are used to power devices that have a high peak to average power consumption, the average power output of the device is severely limited if the peak power is kept below the power supply limits of the limited power source.
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Citations
12 Claims
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1. A power supply comprising:
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a power input terminal for receiving an input power signal at a source voltage from a limited power source; an energy storage element for storing energy; a step-up converter coupled to the power input terminal to receive the input power signal and for providing a storage power signal to the energy storage element at a storage voltage, and wherein the step-up converter isolates the source voltage at the input terminal from the storage voltage at the energy storage element; a power output terminal; and wherein the energy storage element is coupled to the step-up converter for receiving power and wherein the energy storage element in coupled to the output terminal for providing an output power signal to a load. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power supply comprising:
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a power input terminal; an first energy storage element for storing energy at a first storage voltage; a second energy storage element for storing energy at a second storage voltage; a two output step-up converter coupled to the power input terminal to receive an input power signal from a limited power source at a source voltage and to provide a first storage power signal to the first energy storage element at the first storage voltage and to provide a second storage power signal to the second energy storage element at a second storage voltage; a power output terminal for providing an output power signal to a load, wherein the first energy storage element is coupled to the power output terminal; a load input signal terminal; and a controller coupled to the load input signal terminal to receive a load power signal and for selectively coupling the second energy storage element to the power output terminal in response to the load power signal. - View Dependent Claims (8)
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9. An audio amplification circuit comprising:
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a power supply including; a power input terminal a step-up converter coupled to the power input terminal to receive an input power signal at a source voltage from a power limited source; an energy storage block, wherein the step-up converter provides a storage power signal to the energy storage block; one or more power output terminals; a converter; and an audio amplification stage including; one or more audio input terminals; one or more audio amplifiers, wherein each audio amplifier is coupled to the power output terminals to receive the one or more output power signals and is coupled to one of the audio input terminals to receive a corresponding input audio signal, and wherein the audio amplification stage provides an amplified audio signal corresponding to each input audio signal, wherein the converter is coupled; to the energy storage block to draw power from the step-up converter and the energy storage block; to the audio input terminals to receive the input audio signals; and to the power output terminals to provide an output power signal at each of the power output terminals, wherein the magnitude of the output power signal at each of the power output terminals is determined, at least in part, by the magnitude of the input audio signals. - View Dependent Claims (10, 11, 12)
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Specification