Method for supplying power to a load within a portable electronic device
First Claim
1. A power system comprising:
- a rechargeable battery for supplying power to a load within a portable electronic device;
a charge booster configured to boost said rechargeable battery'"'"'s output voltage to said load; and
a direct discharge circuit, operates in conjunction with said charge booster, configured to supply power to said load from said rechargeable battery without passing through said charge booster, whereinpower is supplied from said rechargeable battery to said load via said direct discharge circuit when said input voltage of said load is above an activation voltage,power is supplied from said rechargeable battery to said load via said direct discharge circuit and said charge booster when said input voltage of said load falls below said activation voltage but above a boosting voltage, andpower is supplied from said rechargeable battery to said load via said charge booster when said input voltage of said load falls below said boosting voltage but above a discharge cutoff voltage.
2 Assignments
0 Petitions
Accused Products
Abstract
A power system within a portable electronic device is disclosed. In order to discharge electricity stored in a rechargeable battery within the portable electronic device to a discharge cutoff voltage, a charge booster charges the rechargeable battery with electric power coming from an AC/DC adaptor. When the AC/DC adaptor is detached, the charge booster performs boosting operation to supply power to a load from the rechargeable battery. The charge booster operates only when input voltage of the load decreases. A direct discharge circuit operates in conjunction with the charge booster, and when the charge booster does not perform any boosting operation, electric power is supplied directly from the rechargeable battery to a DC/DC converter. The charge booster can keep the input voltage of the DC/DC converter until the voltage reaches a discharge cutoff voltage of the rechargeable battery, and then stops operation when electric power is being supplied from the direct discharge circuit.
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Citations
14 Claims
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1. A power system comprising:
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a rechargeable battery for supplying power to a load within a portable electronic device; a charge booster configured to boost said rechargeable battery'"'"'s output voltage to said load; and a direct discharge circuit, operates in conjunction with said charge booster, configured to supply power to said load from said rechargeable battery without passing through said charge booster, wherein power is supplied from said rechargeable battery to said load via said direct discharge circuit when said input voltage of said load is above an activation voltage, power is supplied from said rechargeable battery to said load via said direct discharge circuit and said charge booster when said input voltage of said load falls below said activation voltage but above a boosting voltage, and power is supplied from said rechargeable battery to said load via said charge booster when said input voltage of said load falls below said boosting voltage but above a discharge cutoff voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A portable electronic device comprising:
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a load; a rechargeable battery supplies power to said load when an AC/DC adaptor is not supplying power to said load; a charge booster configured to boost said rechargeable battery'"'"'s output voltage to said load; and a direct discharge circuit, operates in conjunction with said charge booster, configured to supply power to said load from said rechargeable battery without passing through said charge booster, wherein power is supplied from said rechargeable battery to said load via said direct discharge circuit when said input voltage of said load is above an activation voltage, power is supplied from said rechargeable battery to said load via said direct discharge circuit and said charge booster when said input voltage of said load falls below said activation voltage but above a boosting voltage, and power is supplied from said rechargeable battery to said load via said charge booster when said input voltage of said load falls below said boosting voltage but above a discharge cutoff voltage. - View Dependent Claims (9, 10)
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11. A method comprising:
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in response to an AC/DC adapter supplying power to a load, setting a switching controller to an active mode to charge a rechargeable battery unit until said rechargeable battery is fully charged; in response to said AC/DC adaptor not supplying power to said load, supplying power from said rechargeable battery to said load via a direct discharge when an input voltage of said load is above an activation voltage; supplying power from said rechargeable battery to said load via said direct discharge and a boosting discharge when said input voltage of said load falls below said activation voltage but above a boosting voltage; and supplying power from said rechargeable battery to said load via said boosting discharge when said input voltage of said load falls below said boosting voltage but above a discharge cutoff voltage. - View Dependent Claims (12, 13, 14)
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Specification