电子器件
電子器件
전자기건
JOURNAL OF ELECTRON DEVICES
2015年
2期
373-376
,共4页
电机驱动%过温保护电路%PTAT%热滞回%BCD
電機驅動%過溫保護電路%PTAT%熱滯迴%BCD
전궤구동%과온보호전로%PTAT%열체회%BCD
motor driver%thermal protection circuit%PTAT%thermal hysteresis%BCD
为简化电路结构,提高精度和降低功耗,提出了一种新型过温保护电路。该电路无需基准电压和比较器,利用PTAT电流源的正温度系数特性,对温度进行检测,同时设计迟滞回路,避免了热震荡的发生。基于HHNEC的0.35μm BCD工艺实现,在电源电压为3 V~5.5 V下进行测试结果表明,该电路热关断温度为165℃,温度迟滞量为15℃,误差为1℃,与仿真结果一致,可以广泛应用于功率集成芯片中。
為簡化電路結構,提高精度和降低功耗,提齣瞭一種新型過溫保護電路。該電路無需基準電壓和比較器,利用PTAT電流源的正溫度繫數特性,對溫度進行檢測,同時設計遲滯迴路,避免瞭熱震盪的髮生。基于HHNEC的0.35μm BCD工藝實現,在電源電壓為3 V~5.5 V下進行測試結果錶明,該電路熱關斷溫度為165℃,溫度遲滯量為15℃,誤差為1℃,與倣真結果一緻,可以廣汎應用于功率集成芯片中。
위간화전로결구,제고정도화강저공모,제출료일충신형과온보호전로。해전로무수기준전압화비교기,이용PTAT전류원적정온도계수특성,대온도진행검측,동시설계지체회로,피면료열진탕적발생。기우HHNEC적0.35μm BCD공예실현,재전원전압위3 V~5.5 V하진행측시결과표명,해전로열관단온도위165℃,온도지체량위15℃,오차위1℃,여방진결과일치,가이엄범응용우공솔집성심편중。
A novel thermal protection circuit is proposed in order to simplify the circuit structure,improve the accu-racy and reduce power consumption. The novel thermal protection circuit utilizes the positive temperature coefficient to scale the temperature without any bandgap reference or comparator. Besides,the designed hysteresis function was achieved by the feedback circuit. Based on the HHNEC 0.35μm BCD process,the circuit is fabricated,the experi-mental results show that the thermal shutdown temperature is 164 ℃ and the thermal shutdown hystersis is 15 ℃, the Error is less than 1 ℃. The circuit presented in this paper is suitable for many Power ICs.
