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开关式电源的效率可以接近 100% ,但在低负载电流工作下其效率则会大幅下降,甚至低于线性稳压器。采用断续导电模式 (DCM) 再配合多种不同的操作模式,可以提高开关式电源的效率。
The efficiency of the switched-mode power supply can be close to 100%, but its efficiency will drop sharply even under the low load current work, even lower than the linear voltage regulator. Using discontinuous conduction mode (DCM) combined with a variety of different operating modes, can improve the efficiency of the switching power supply.