详细说明：

1.外置MOS管，功率可以做的更高；                                                                                                                                                 2.带高压启动，可以降低待机功耗；                                                                                                                                                                                                                   3.带抖频(SP5876)，EMI效果好；                                                                                                                                                  4.带降频，降低待机功耗(≤0.3W).