100 MHz, 85%效率集成的AlGaAs/GaAs电源调制器用于射频功率放大器模块

2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2013-03-17 DOI:10.1109/APEC.2013.6520282

Han Peng, V. Pala, T. Chow, M. Hella

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引用次数: 2

摘要

提出了一种用于射频功率放大模块的100 MHz DC-DC变换器。在输出级采用谐振低侧栅极驱动器和相位脱落/分割来提高轻载效率。所提出的两相四段倒装片DC-DC转换器采用0.5 μm AlGaAs/GaAs p-HEMT技术实现，两段占用2.5×2 mm2。在使用谐振低侧栅极驱动器的4.5 V到1 V转换时，效率提高了5%。在4.5 V/3.3 V和2 A输出电流下，效率峰值为85%，在断相/分相条件下，当负载电流从0.2 A变化到2.8 A时，效率峰值保持不变。

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100 MHz, 85% efficient integrated AlGaAs/GaAs supply modulator for RF power amplifier modules

A 100 MHz DC-DC converter for RF power amplifier modules employing polar modulation is presented. A resonant low side gate driver and phase shedding/segmentation in the output stage are used for light load efficiency improvement. The proposed two-phases four-segments flip chip DC-DC converter is implemented in 0.5 μm AlGaAs/GaAs p-HEMT technology and occupies 2.5×2 mm2 for the two segments. An efficiency improvement of 5% is achieved at 4.5 V to 1 V conversion using the resonant low side gate driver. The peak efficiency at 4.5 V/3.3 V and 2 A output current is 85% with the peak value maintained as the load current changes from 0.2 A to 2.8 A under phase shedding/segmentation.

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2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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