Storage Battery Voltage Monitor (3)

Published:2011/5/12 4:54:00 Author:Sue | Keyword: Storage Battery, Voltage, Monitor | From:SeekIC

Working Principle: As seen in the figure 7-50, the Storage Battery Monitor Circuit consists of voltage detection warning circuit IC(M5323L), buzzer HA, LED VL and outside resistance-capacitance relating components. Functions of every pin:1.stablizing voltage output terminal. 2. reference voltage detection terminal. 3. LED VL driving terminal. 4. earth terminal. 5. capacitor oscillate terminal. 6. logic level output terminal. 7. preset voltage output terminal. 8. power terminal When GB's battery is proper, the voltage of IC's 7 pin is higher than inside reference voltage. Its 6 pin outputs high level and 3 pin outputs no signal.Under this circumstance, LED VL and buzzer HA don't work. When the voltage is lower than the preset value(11V), IC's 7 pin's voltage is lower than inside reference voltage, which forces the oscillator inside IC begins to work. IC's 3 pin outputs a certain frequency of oscillate pulse signals, making VL keep twinkling. IC's 6 pin outputs low level drive signal, making the buzzer begin to work and make a warning sound.



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