Master-slave multi-phase charging
First Claim
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1. A battery charging circuit comprising:
- first and second charging circuits, each charging circuit having a charging output connectable to a battery and comprising;
a voltage regulator to provide power to the charging output;
a battery voltage threshold value; and
a controller operable to change a charging state of a battery charging operation based on comparing a detected battery voltage with the battery voltage threshold value,the charging output of the first charging circuit connected with the charging output of the second charging circuit, wherein the first charging circuit and the second charging circuit are configured to collectively charge the battery,the battery voltage threshold value of the first charging circuit set to a higher value than the battery voltage threshold value of the second charging circuit, wherein based on comparing the threshold values with the detected battery voltage, the battery charging operation in the second charging circuit is terminated prior to the battery charging operation in the first charging circuit.
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Abstract
A battery charging circuit comprises two or more charging circuits, each capable of charging a battery. The charging outputs of the charging circuits are connected together and can be connected to a battery to provide fast charging of the battery. The charging circuits can be configured so that they do not adversely interfere with each other during battery charging.
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Citations
22 Claims
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1. A battery charging circuit comprising:
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first and second charging circuits, each charging circuit having a charging output connectable to a battery and comprising;
a voltage regulator to provide power to the charging output;
a battery voltage threshold value; and
a controller operable to change a charging state of a battery charging operation based on comparing a detected battery voltage with the battery voltage threshold value,the charging output of the first charging circuit connected with the charging output of the second charging circuit, wherein the first charging circuit and the second charging circuit are configured to collectively charge the battery, the battery voltage threshold value of the first charging circuit set to a higher value than the battery voltage threshold value of the second charging circuit, wherein based on comparing the threshold values with the detected battery voltage, the battery charging operation in the second charging circuit is terminated prior to the battery charging operation in the first charging circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A circuit comprising:
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a first charging circuit comprising a charging output; a second charging circuit comprising a charging output; and a battery terminal connectable to a battery to be charged, the charging output of the first charging circuit connected to the battery terminal, the charging output of the second charging circuit connected to the battery terminal, wherein the first charging circuit and the second charging circuit are configured to collectively charge the battery, the second charging circuit is configured to perform a first change of a charging state of a battery charging operation from a first state to a second state in response to a detected battery voltage level exceeding a second threshold voltage level, while keeping a charging state of a battery charging operation of the first charging circuit at the first state, wherein after the first change, the first charging circuit is configured to perform a second change of the charging state of a battery charging operation from the first state to the second state in response to a detected battery voltage level exceeding a first threshold voltage level that is higher than the second threshold voltage level. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A circuit comprising:
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first means for generating power, the first means comprising output means for providing power to a battery to be charged; and second means for generating power, the second means comprising output means for providing power to the battery to be charged, wherein the output means of the first means and the output means of the second means being connected together, and wherein the first means and the second means collectively charge the battery; the first means further comprising means for controlling a battery charging operation thereof based on comparing a detected battery voltage value with a first battery threshold voltage value, the second means further comprising means for controlling a battery charging operation thereof based on comparing the detected battery voltage value with a second battery threshold voltage value, the first battery threshold voltage value being different from the second battery threshold voltage value. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification