TI TPS56221高效大电流25A直流电源解决方案
TI公司的TPS56221是高效大电流同步降压直流转换器,工作电压4.5V-14V,输出电压低至0.6V,负载电流高达25A.集成的NexFET™ 功率MOSFET使得占位面积小和容易使用.固定频率选择: 300 kHz, 500 kHz和1 MHz,可编程软起动,600mV基准电压精度1%,高边和低边MOSFET RDS(on)检测,主要用在POL电源模块,电信和网络设备用的高密度DC/DC转换器.本文介绍了TPS56221主要特性, 功能方框图, 简化应用电路图和TPS56221EVM-579评估模块主要特性,电路图以及材料清单, 元件布局图.
TPS56221 is a high-efficiency and high-current synchronous buck converter designed to operate from a supply between 4.5 V and 14 V. The device is capable of producing an output voltage as low as 0.6 V at loads up to 25 A. Integrated NexFET™ Power MOSFETs provide a small footprint and ease of use.
The device implements a voltage-mode control with voltage feed-forward compensation that responds instantly to input voltage change.
TPS56221 is available in a thermally enhanced 22-pin PQFN (DQP) PowerPAD™ package.
The device offers design flexibility with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.
TPS56221主要特性:
4.5-V to 14-V Input Voltage Range
Incorporates Power Block Technology
Up to 25-A Output Current
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