METHODS AND APPARATUS FOR DC-DC CONVERTER HAVING INDEPENDENT OUTPUTS
First Claim
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1. A DC-DC converter circuit, comprising:
- a boost circuit to boost an input voltage;
a first output to drive a first load and a second output to drive a second load, the first and second outputs being coupled to the boost circuit, wherein the first and second outputs are independently enabled; and
a boost loop control module coupled to the boost circuit to control voltage supplied to the first and second outputs based upon which of the first or second output requires a higher boost voltage.
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Abstract
A DC-DC converter includes independent first and second outputs to drive respective first and second loads from a common boost module. In one embodiment, a first linear regulator controls a first controlling device for the first output and a second linear regulator controls a second controlling device for the second output. The load requiring the higher voltage controls the boost module.
30 Citations
28 Claims
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1. A DC-DC converter circuit, comprising:
a boost circuit to boost an input voltage;
a first output to drive a first load and a second output to drive a second load, the first and second outputs being coupled to the boost circuit, wherein the first and second outputs are independently enabled; and
a boost loop control module coupled to the boost circuit to control voltage supplied to the first and second outputs based upon which of the first or second output requires a higher boost voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A circuit, comprising:
a DC-DC converter, including a boost circuit including an inductor, a diode and a first switching device;
a boost loop control module to control a conduction state of the first switching device;
a first controlling device coupled to the boost circuit;
a first output controlled by the first controlling device for driving a first load;
a second controlling device coupled to the boost circuit through a second output;
the second output controlled by the second controlling device for driving a second load, the first and second outputs being independently enabled;
wherein the boost loop control module controls the first switching device based upon which of the first and second outputs requires a higher voltage. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of providing a DC-DC converter circuit, comprising:
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coupling a first output to a boost circuit having a first switching element;
coupling a second output to the boost circuit;
coupling the first switching element to a boost loop control module;
coupling feedback paths from the first and second outputs to the boost loop control module;
coupling first and second enable signal paths to an ON-OFF module coupled to the boost loop control module to independently enable the first and second outputs. - View Dependent Claims (24, 25)
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26. A DC-DC converter circuit, comprising:
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a first output to drive a first load and a second output to drive a second load, wherein the first and second outputs are independently enabled;
a boost means coupled to the first and second outputs;
a boost loop control means coupled to the boost means;
a first feedback means from the first output; and
a second feedback means from the second output;
wherein signal levels to the first and second outputs correspond to which of the first and second outputs requires a higher voltage. - View Dependent Claims (27, 28)
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Specification