| 摘要 |
A battery charger includes current sources for generating first and second currents respectively, a current sensor, a current source controller, and a reference voltage generator. The first current charges a battery in a first current path, and the second current is conducted to a feedback load in a second current path separate from the first current path. The current sources form a current mirror and are controlled by the current source controller from comparing a reference voltage with a terminal voltage of the feedback load. The current sensor indicates a level of the first current to the reference voltage generator that sets the reference voltage such that the first current is maintained to be constant.
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