Power supply for limited power sources and audio amplifier using power supply
First Claim
Patent Images
1. A power supply comprising:
- a power input terminal for receiving an input power signal at a source voltage from a limited power source;
a step-up converter coupled to the power input terminal to receive the input power signal and to provide a storage power signal at a storage voltage, wherein the storage voltage is higher than the source voltage;
an energy storage element coupled to the step-up converter for receiving the storage power signal and for storing power at the storage voltage; and
a power output terminal coupled to the energy storage element and the step-up converter for providing an output power signal to a load;
wherein the step-up converter isolates the source voltage at the power input terminal from the storage voltage at the energy storage element.
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Accused Products
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.
19 Citations
9 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; a step-up converter coupled to the power input terminal to receive the input power signal and to provide a storage power signal at a storage voltage, wherein the storage voltage is higher than the source voltage; an energy storage element coupled to the step-up converter for receiving the storage power signal and for storing power at the storage voltage; and a power output terminal coupled to the energy storage element and the step-up converter for providing an output power signal to a load; wherein the step-up converter isolates the source voltage at the power input terminal from the storage voltage at the energy storage element. - 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; a 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; and a controller coupled to the load for receiving a load power signal indicating an amount of power required by the load and to selectively couple the second energy storage element to the power output terminal in response to the load power signal. - View Dependent Claims (8, 9)
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Specification