Transcription of LM1949 Injector Drive Controller (Rev. C) - TI.com
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LM1949 Injector Drive Controller (Rev. C) - TI.com
FEB1995 REVISEDMARCH2013LM1949 InjectorDriveControllerCheckforSamples:L M19491 FEATURESDESCRIPTIONTheLM1949linearintegr atedcircuitservesasan2 LowVoltageSupply(3V )excellentcontroloffuelinjectordrivecirc uitryin AdaptabletoAllInjectorCurrentLevelscurre ntrequiredtoopena solenoidisseveraltimes HighlyAccurateOperationgreaterthanthecur rentnecessarytomerelyholdit TTL/CMOSC ompatibleInputLogicLevelsopen;therefore, theLM1949,bydirectlysensingtheactualsole noidcurrent,initiallysaturatesthedriver ShortCircuitProtectionuntilthe peak injectorcurrentisfourtimesthatof HighImpedanceInputtheidleor holding current(Figure19 Figure22).
LM1949 SNLS349C – FEB 1995– REVISED MARCH 2013 www.ti.com Typical Circuit Waveforms Figure 18. APPLICATION HINTS The injector driver integrated circuits were designed to be used in conjunction with an external controller.
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