This article presents a hybrid converter combining soft-charged switched capacitors and an autotransformer with dc current in the windings, optimized for 4:1 fixed voltage gain conversion (DCX) for high output current. By adding an additional output inductor, it can also regulate the output voltage to lower than ¼ of the input voltage by changing the duty cycle. The switched capacitors voltage and the two winding currents in the transformer are auto-balanced. Nonresonant operation of the circuit enables dc current in the windings and simplifies both transformer and circuit design. Experimental results for 48 V–12 V DCX operation achieve 98% peak efficiency and 97.7% full load (250W) efficiency. Regulation by using the output inductor is verified experimentally up to 48–6V (8:1) voltage step down.

中文翻译：

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绕组中有直流电流的开关电容器和自耦变压器混合转换器

本文介绍了一种混合转换器，它结合了软充电开关电容器和绕组中具有直流电流的自耦变压器，针对高输出电流的 4:1 固定电压增益转换 (DCX) 进行了优化。通过添加额外的输出电感，它还可以通过改变占空比将输出电压调节到低于输入电压的 1/4。变压器中的开关电容器电压和两个绕组电流是自动平衡的。电路的非谐振操作使绕组中的直流电流成为可能，并简化了变压器和电路设计。48 V–12 V DCX 操作的实验结果实现了 98% 的峰值效率和 97.7% 的满载 (250W) 效率。通过使用输出电感器的调节在高达 48–6V (8:1) 的电压降压下通过实验得到验证。