摘要
针对LED驱动中宽输入电压范围和高精度检测的要求,提出了一种高侧电流检测电路.采用互补金属氧化物半导体（CMOS）器件作为放大器,通过检测串联在电路中的采样电阻两端电压差的大小,用滞回控制方法控制电流回路的通断,能精确控制0.5~5 A的输出电流,在5~40 V电压下达到了3%的检测精度.该电路结构简单,通过0.6μm5~40VCMOS-双重扩散金属氧化物半导体（CDMOS）工艺流片验证,芯片测试结果表明电路工作良好,能满足要求.
This paper proposes a high-side current sensing complementary metal oxide semiconductor （CMOS）circuit which is ap-plied to high-brightness LED drivers.By detecting the voltage drop of a sense resistor in series and applying hysteresis control strate-gies,it controls the on-off of the current loop and has achieved a 3% accuracy while the output current varies from 0.5-5 A at 5-40 V input voltage.The circuit has been implanted in 0.6μm 5-40 V BCDMOS process,and the test shows that the circuit exhibits a satis-factory performance and can meet requirements.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第4期592-595,共4页
Journal of Xiamen University：Natural Science
