【摘要】：基于UMC 0.25μm BCD工藝,設(shè)計了一款高精度過溫保護電路。通過基準(zhǔn)電路中三極管的基極-發(fā)射極電壓的負溫度特性實現(xiàn)溫度檢測,調(diào)節(jié)電阻的比值產(chǎn)生遲滯溫度量,避免了電路熱振蕩現(xiàn)象。經(jīng)過HSPICE仿真驗證,電路在溫度130℃時,過溫保護信號發(fā)生翻轉(zhuǎn),關(guān)斷芯片,待溫度降低到99℃時再次開啟,具有31℃遲滯量。在電源電壓變化時,過溫保護電路的過溫閾值和遲滯溫度漂移量最大僅為0.24℃偏差。
[Abstract]:Based on UMC 0. 25 渭 m BCD process, a high-precision over-temperature protection circuit is designed. The temperature detection is realized by the negative temperature characteristic of the base-emitter voltage of the Triode in the reference circuit, the hysteresis temperature is produced by adjusting the ratio of the resistor, and the thermal oscillation of the circuit is avoided. The circuit is verified by HSPICE simulation, when the temperature is 130 鈩，

本文編號：2319840