Device and method using a keyboard controller and voltage detection circuitry for battery charging
First Claim
1. A charging device, comprising:
- a charging circuit, receiving a charging power source, and producing a battery-charging power source at a first node by the charging power source to charge a battery;
a voltage detection circuit, detecting a voltage at the first node, and producing a voltage detection result; and
a keyboard controller, determining whether the voltage at the first node is lower than a predetermined voltage according to the voltage detection result, and determining whether a predetermined condition has been satisfied, wherein the predetermined condition comprises the voltage at the first node being lower than the predetermined voltage, and the keyboard controller forces the charging circuit to stop producing the battery-charging power source at the first node when the predetermined condition has been satisfied;
wherein the keyboard controller determines whether a charging current flowing to the battery from the first node is less than a predetermined current value when receiving the charging power source, wherein the charging current is produced by the charging power source, and the predetermined condition further comprises the charging current being less than the predetermined current value.
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Abstract
A charging device including a charging circuit, a voltage detection circuit, and a keyboard controller is provided. The charging circuit receives a charging power source, and produces a battery-charging power source at a first node by the charging power source to charge a battery. The voltage detection circuit detects a voltage at the first node, and produces a voltage detection result. The keyboard controller determines whether the voltage at the first node is less than a predetermined voltage according to the voltage detection result, and determines whether a predetermined condition has been satisfied, wherein the predetermined condition includes the voltage at the first node being less than the predetermined voltage, and the keyboard controller is arranged to force the charging circuit to stop producing the battery-charging power source at the first node when the predetermined condition has been satisfied.
15 Citations
18 Claims
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1. A charging device, comprising:
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a charging circuit, receiving a charging power source, and producing a battery-charging power source at a first node by the charging power source to charge a battery; a voltage detection circuit, detecting a voltage at the first node, and producing a voltage detection result; and a keyboard controller, determining whether the voltage at the first node is lower than a predetermined voltage according to the voltage detection result, and determining whether a predetermined condition has been satisfied, wherein the predetermined condition comprises the voltage at the first node being lower than the predetermined voltage, and the keyboard controller forces the charging circuit to stop producing the battery-charging power source at the first node when the predetermined condition has been satisfied; wherein the keyboard controller determines whether a charging current flowing to the battery from the first node is less than a predetermined current value when receiving the charging power source, wherein the charging current is produced by the charging power source, and the predetermined condition further comprises the charging current being less than the predetermined current value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A charging method, applied to a charging device used to charge a battery, comprising:
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receiving a charging power source; producing a battery-charging power source at a first node, by the charging power source, to charge the battery; detecting a voltage at the first node when receiving the charging power source, and producing a voltage detection result accordingly; determining whether the voltage at the first node is lower than a predetermined voltage according to the voltage detection result; determining whether a charging current flowing to the battery from the first node is less than a predetermined current value when receiving the charging power source, wherein the charging current is produced by the charging power source, and a predetermined condition comprises the charging current being less than the predetermined current value; determining whether the predetermined condition has been satisfied; and forcing the charging circuit to stop producing the battery-charging power source at the first node when the predetermined condition has been satisfied, wherein the predetermined condition comprises the voltage of the first node being lower than a predetermined voltage. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification