集成电路与嵌入式系统2026，Vol.26Issue(3)：90-96,7.DOI:10.20193/j.ices2097-4191.2025.0101
具有过温限流保护的低噪声功率运算放大器设计
Low-noise power op-amp with over-temperature and current-limiting protection
摘要
Abstract
This paper presents a low-noise,high-voltage,high-output-current power operational amplifier designed in a SMIC 180 nm BCD process.The architecture features a low-noise PMOS input stage,a voltage gain stage,and a Class AB output stage biased by a transconductance linear loop.Stability is ensured by Cascode frequency compensation,while integrated hysteretic over-temperature and current-limiting circuits provide robust protection against thermal and electrical damage.Combining 60 V DMOS and 1.8 V CMOS devices,the amplifier operates over a wide supply range of±4 V to±30 V and a temperature range of-55℃to+125℃.Simulation results demonstrate an equivalent input voltage noise of 8.85 nV/√Hz,a 400 mA output current,143.3 dB DC gain,a 6.804 MHz unity-gain bandwidth,a 33.7 V/μs slew rate,with the chip area of 1.79×1.12 mm2.The proposed amplifier is well-suited for vehicle electronic applications including precision battery sensing,sensor interfaces,and power device driving.关键词
功率运算放大器/过温保护/BCD工艺/车载电子Key words
power operational amplifier/over-temperature protection/BCD process/vehicle electronics分类
信息技术与安全科学引用本文复制引用
陈俊贤,黄金安,王德文,廖聪维,王志忠..具有过温限流保护的低噪声功率运算放大器设计[J].集成电路与嵌入式系统,2026,26(3):90-96,7.基金项目
深圳市科技项目(JCYJ20241202125804006) （JCYJ20241202125804006）
广东省普通高校特色创新类项目(2025KTSCX116) （2025KTSCX116）
