摘要：本应用笔记介绍了电路采用低功耗CMOS比较器提供低电池状态的LED视觉指示。这个杠杆收购（低电量指示灯）实现LED在低频率和低占空比脉冲。该电路实现不消耗电池电流过大，可导致永久性损害电池，最终，危险废物处置。该电路还有助于节省电池电流在开关周期由放置在关机的比较。方程和电路分析包括确定占空比和比较触发点。Maxim > Design Support > Technical Documents > Application Notes > Amplifier and Comparator Circuits > APP 1872 Maxim > Design Support > Technical Documents > Application Notes > Automotive > APP 1872 Maxim > Design Support > Technical Documents > Application Notes > Battery Management > APP 1872 Keywords: comparator, low battery, LED, low cost, low power consumption, comparators Feb 03, 2003 APPLICATION NOTE 1872 Low-Battery Indicator Is Low Cost, Highly Efficient, and Environmentally Friendly Feb 03, 2003 Abstract:This application note presents a circuit that uses a low-power CMOS comparator to provide an LED visual indication of a low-battery condition. This LBO (low……