Improving the temperature stability and widening the constant current range are two important problems to be solved in the application of the current regulators. This paper introduces a modular approach for the design...Improving the temperature stability and widening the constant current range are two important problems to be solved in the application of the current regulators. This paper introduces a modular approach for the design of the current regulator with a very wide current range. The test results show that their output current ranges from 0.1A to 8A, with its current temperature coefficient as low as 10-4/℃ to 10-5/℃ and limiting voltage lower than 0.4V.展开更多
文摘Improving the temperature stability and widening the constant current range are two important problems to be solved in the application of the current regulators. This paper introduces a modular approach for the design of the current regulator with a very wide current range. The test results show that their output current ranges from 0.1A to 8A, with its current temperature coefficient as low as 10-4/℃ to 10-5/℃ and limiting voltage lower than 0.4V.
文摘提出了以ADP3193为核心控制芯片的现代电压调节模块(Voltage Regulator Module,简称VRM)控制系统。介绍了系统的电流环、电阻环和电压环3个控制环路的工作原理。利用Flex-ModeTM控制的电流环使得多相的Buck电路达到电流平衡;利用电阻环实现了系统的自适应电压配置(Adaptive Voltage Positioning,简称AVP)功能;电压环使用典型的Ⅲ型补偿网络,稳定了输出电压,并使输出具有良好的瞬态响应。最后,给出了实测波形,验证了理论分析。
