[原创] TI TPS54A20小型两相降压电源转换解决方案

TI公司的TPS54A20是两相同步降压电源转换器,两相电流具有自动平衡功能,具有较低的开关损耗,可工作在较高的开关频率,每相的开关频率2-MHz到5-MHz,开通时间14ns,输入电压12V,输出电压0.51-V到 2-V,主要用在通信,基站设备,存储.SSD.DDR存储器,开关,集线器,路由器和其它网络设备以及小型背板安装电源(高度小于2mm).本文介绍了TPS54A20主要特性,框图和应用电路,以及评估板PMP11438主要特性,电路图和材料清单.

The TPS54A20 is a two-phase, synchronous series capacitor buck converter designed for small size, low voltage applications from a 12-V input rail. This topology uniquely merges a switched capacitor circuit with a two phase buck converter. Advantages include automatic current balancing between the inductors, lower switching losses which enable high frequency (HF) operation, and voltage step-down through the series capacitor. Small, low profile inductors used with the TPS54A20 significantly reduce total solution area and height. An adaptive on-time control architecture provides fast transient response and accurate voltage regulation at up to 10-MHz operating frequency. Fixed frequency operation during steady state is maintained through the use of a phase lock loop (PLL) to lock switching signals to a reference oscillator.

TPS54A20主要特性:

Two-phase, Synchronous Series Capacitor Buck Converter..

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