基于OPA549的多路电流恒流源设计

The Constant-Current Source Design with OPA549

中文关键词:  OPA549  恒流源  多路

英文关键词:OPA549  constant-current source  multi-channel

中文摘要:

      给出一种多路宽量程恒流源设计方案，相关设计电路既可实现对低压负载的多路电流恒流放电，又能精确控制放电模式；同时设计方案所采用的全数字化控制方式，不仅实现了多路电流电路的恒流控制，而且对每路恒流源的开通与关断，能根据需要进行智能管理，技术指标上电流控制范围可达0～8 A，控制精度可达1%以内，工作温度范围可达-40~125 ℃，且该系统具有过流、过温保护等功能。实验结果表明，该恒流源具有很好的恒流控制效果，适用于需要多路电流恒流源的科研和工程应用场合。

英文摘要:

      A design scheme of multi-channel wide-range constant current source is provided.This design can not only discharge with constant current in low-voltage load,but also control the discharging mode accurately.At the same time,the full-digital control style adopted by the design scheme implements the control of multi-channel with constant current,furthermore it also realized the intelligent management about the turning on or off of the constant current source according to the requirement.The technical index shows that the current controlling can range from