| 摘要 |
一种直流对直流转换器，其包含：一变压器，该变压器被组态以变化被施加至一第一端之一直流电压并且输出该变化之直流电压至一第二端；一开关，其被组态以周期性地切换被施加至该变压器之该第一端的电压；一负载电流检测电路，其被组态以检测流动于该变压器之该第二端中的负载电流；以及一切换-频率切换电路，其被组态以便，当藉由该负载电流检测电路被检测之该负载电流的一振幅是较小于一预定临界时，则将用以切换该开关的一频率自一第一频率切换至较低于该第一频率的一第二频率，并且当藉由该负载电流检测电路被检测之该负载电流的该振幅是较大于该预定临界时，则将用以切换该开关之频率自该第二频率切换至该第一频率。; a switch configured to periodically switch the voltage applied to the first side of the transformer; a load-current detecting circuit configured to detect load current flowing in the second side of the transformer; and a switching-frequency switching circuit configured to switch, when a magnitude of the load current detected by the load-current detecting circuit is smaller than a predetermined threshold, a frequency for switching the switch from a first frequency to a second frequency lower than the first frequency, and to switch, when the magnitude of the load current detected by the load-current detecting circuit is larger than the predetermined threshold, the frequency for switching the switch from the second frequency to the first frequency. |
