| 摘要 |
<p>PURPOSE: An auxiliary power device and a user device including auxiliary power device are provided to automatically block power of a main power device at sudden power off of a main power device and automatically supply auxiliary power, thereby reducing an unstable situation such as power ripple or switching delay. CONSTITUTION: A super capacitor(110) stores auxiliary power. Uni-directional devices(121,122) automatically block main power by a power level of a main power device(15) at sudden power off. The uni-directional devices automatically supply auxiliary power of the super capacitor. The first power detector(131) detects the power level of the main power device. The second power detector(132) detects a power level of the super capacitor. A controller(150) performs a data backup operation.</p> |
