TPS382x 系列監(jiān)控器主要為 DSP 以及基于處理器的系統(tǒng)提供電路初始化和計(jì)時(shí)監(jiān)控等功能。上電期間,RESET 會(huì)在電源電壓 VDD 超出 1.1V 時(shí)置為有效。因此VDD 保持在閾值電壓 VIT? 以下,電源電壓監(jiān)控器就會(huì)監(jiān)測(cè) VDD 并將 RESET 保持為低電平有效。內(nèi)部計(jì)時(shí)器將會(huì)延遲輸出恢復(fù)至無效狀態(tài)(高電平)的時(shí)間,以確保系統(tǒng)正常復(fù)位。延時(shí)時(shí)間 td 始于 VDD 上升至高于閾值電壓 (VIT? + VHYS) 之后。當(dāng)電源電壓降到閾值電壓 VIT? 以下時(shí),輸出再次變?yōu)橛行顟B(tài)(低電平)。無需外部組件。
該系列中的所有器件均具有一個(gè)通過內(nèi)部分壓器設(shè)定的固定檢測(cè)閾值電壓 VIT–。TPS382x 系列還提供 200ms (TPS3820) 和 1.6s(TPS3823、TPS3824 和 TPS3828)的看門狗超時(shí)選項(xiàng)。
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原文標(biāo)題:TPS3828-33DBVR帶看門狗計(jì)時(shí)器的電壓監(jiān)控器
文章出處:【微信號(hào):兆億微波,微信公眾號(hào):兆億微波】歡迎添加關(guān)注!文章轉(zhuǎn)載請(qǐng)注明出處。
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