发明名称 |
BATTERY CHARGER APPARATUS WITH A DIGITAL CHARGE REDUCTION LOOP |
摘要 |
A battery charger apparatus for charging a battery, comprises a charge-current control circuit for receiving a charge -current control signal to control an amount of charge current being drawn from an input source, e.g., a USB port or a line adapter: an analog control circuit for generating an analog control signal representative of a maximum amount of charge current to the used to charge a battery a digital charge reduction loop including a circuit for determining a charge-current adjustment signal based on a source voltage of the input source; a counter for generating a digital count value based on the charge-current adjustment signal; a digital-to- analog converter (DAC) for generating a DAC control signal based on the digital count value of the counter, the DAC control signal being representative of a reduced amount of charge current to be used to charge the battery; and a switching mechanism for selecting one of the analog control signal or the DAC control signal based on the source voltage, the selected control signal being used as the charge-current control signal to the charge-current control circuit. |
申请公布号 |
WO2008060797(A2) |
申请公布日期 |
2008.05.22 |
申请号 |
WO2007US81552 |
申请日期 |
2007.10.16 |
申请人 |
ADVANCED ANALOGIC TECHNOLOGIES, INC.;SO, JOHN, SUNG KO;BROWN, DAVID, ALAN |
发明人 |
SO, JOHN, SUNG KO;BROWN, DAVID, ALAN |
分类号 |
H02J7/04;H01M10/44;H02J7/00 |
主分类号 |
H02J7/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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