| 摘要 |
<p>The present invention relates to a multi-purpose battery charging circuit configuration able to be selectively in a simple charge mode when intended for low-end solutions (option 3) or in a charge-and-play mode when intended for medium- and high-end solutions (options 1 and 2 respectively), while maintaining the supply voltage of any portable and mobile electronic devices with an acceptable noise level. The selection will be made possible by the use of multiplexers (MUXl, MUX2). If the option 1 is chosen, the bi-directional switching device (210) will be controlled by a driver circuit (340) for allowing the current which flows through it towards the battery (20) to strongly increase and thereby maintaining the voltage across the circuitry (10) at a value slightly greater than the voltage across the battery (20). If the option 2 is chosen, the synchronous step-down voltage regulator (310) comprising at least the driver circuit (350) and the switching devices (200, 230) will track the voltages across the circuitry (10) and the battery (20) for regulating the voltage across the circuitry (10) at a value in the vicinity of the voltage across the battery (20). If the option 3 is chosen, the battery (20) which cannot be separated from the circuitry (10) will be in a simple charge mode while being charged through the switching device (210).</p> |
