Single inductor multiple output boost regulator
First Claim
1. A circuit for providing multiple output boost regulation for a plurality of loads comprising:
- a. a charging means comprising a power source and a passive element to store a charge from the power source;
b. a switching circuit comprising a plurality of switches for connection to each of the plurality of loads and the charging means; and
c. a controller for coordinating the switching circuit to regulate and sequentially direct the charge from the passive element to each of the plurality of loads so that a regulated DC output voltage level is obtained at each of the plurality of loads.
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Accused Products
Abstract
The present invention provides two or more output voltages from one input voltage and one inductor. Each output voltage is formed by a switch controlling the charge delivered to each of the corresponding output capacitors. Preferably, a diode is placed in series with each switch that controls the charging of the output capacitors to prevent any extraneous stray current from escaping while the switch is closed. The controller utilizes pulse width modulation to deliver the correct amount of energy to each load and to synchronize the order of energy delivery to each load. The use of one input voltage and one inductor for charging multiple output voltages simplifies the complexity of the circuit of the present invention and eliminates the need for a single inductor dedicated to each load. Further, the predetermined output voltage level for each load can be changed without modifying the passive elements in the circuit. Rather, the predetermined voltage level for each load is changed by re-programming the controller thereby modifying the duration and frequency of the pulse received by the respective load from the charging inductor.
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Citations
41 Claims
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1. A circuit for providing multiple output boost regulation for a plurality of loads comprising:
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a. a charging means comprising a power source and a passive element to store a charge from the power source; b. a switching circuit comprising a plurality of switches for connection to each of the plurality of loads and the charging means; and c. a controller for coordinating the switching circuit to regulate and sequentially direct the charge from the passive element to each of the plurality of loads so that a regulated DC output voltage level is obtained at each of the plurality of loads. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A circuit for providing multiple output boost regulation for a plurality of loads comprising:
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a. a charging means comprising a power source and a passive element; b. a plurality of load switches wherein each one of the plurality of load switches is coupled between one of the plurality of loads and the charging means; c. a charging switch coupled to control the charging means; and d. a programmable controller for coordinating the plurality of switches and the charging switch to sequentially direct a current to each of the plurality of loads wherein each of the plurality of loads receives a corresponding regulated DC voltage. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of charging a plurality of loads comprising the steps of:
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a. storing a charge; b. receiving an output voltage level from each of the plurality of loads; and c. sequentially distributing the charge during a discharge cycle to each of the plurality of loads via a current pulse according to the output voltage level from each of the plurality of loads. - View Dependent Claims (20, 21, 22, 23)
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24. A method of charging a plurality of loads comprising the steps of:
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a. storing a first amount of energy in a passive element during a first charging cycle and subsequently storing a second amount of energy in the passive element during a second charging cycle; and b. sequentially distributing a first portion of the first amount of energy during a first discharging cycle to a first one of the plurality of loads and does not distribute energy to any other load, and sequentially distributing a second portion of the second amount of energy during a second discharging cycle to a second one of the plurality of loads and does not distribute energy to any other load. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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31. A method of charging a plurality of loads having a discharging cycle and a charging cycle comprising the steps of:
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a. storing an amount of energy in a passive element; and b. sequentially distributing a first portion of the amount of energy during the discharging cycle to a first one of the plurality of loads, and sequentially distributing a second portion of the amount of energy during the discharging cycle to a second one of the plurality of loads. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A circuit for providing multiple output boost regulation for a plurality of loads comprising:
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a. a charging means comprising a power source and a passive element to store a charge from the power source; b. a switching circuit comprising a plurality of switches for connection to each of the plurality of loads and the charging means; and c. a controller for coordinating the switching circuit to regulate and sequentially direct the charge from the passive element to each of the plurality of loads so that a regulated DC output voltage level is obtained at each of the plurality of loads wherein the controller comprises a pulse frequency modulation circuit. - View Dependent Claims (40, 41)
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Specification