DC-DC电源转换器广泛用于各种应用中,包括用于个人计算机,办公设备,航天器电源系统,便携式计算机和电信设备的电源,以及DC电动机驱动器。 dc-dc转换器的输入是未调节的dc电压Vg。 转换器产生稳定的输出电压V,其幅值(可能是极性)与Vg不同。 例如,在计算机离线电源中,对120 V或240 V交流市电电压进行整流,分别产生大约170 V或340 V的直流电压。 然后,一个dc-dc转换器将电压降低至处理器IC所需的稳定的5 V或3.3V。
Dc-dc power converters are employed in a variety of applications, including power supplies for personal computers, office equipment, spacecraft power systems, laptop computers, and telecommunications equipment, as well as dc motor drives. The input to a dc-dc converter is an unregulated dc voltage Vg. The converter produces a regulated output voltage V, having a magnitude (and possibly polarity) that differs from Vg. For example, in a computer off-line power supply, the 120 V or 240 V ac utility voltage is rectified, producing a dc voltage of approximately 170 V or 340 V, respectively. A dc-dc converter then reduces the voltage to the regulated 5 V or 3.3 V required by the processor ICs.
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