Circuit of Direct Current Motors Driven by LMD18245

Published:2011/9/13 23:49:00 Author:Zoey | Keyword: Direct Current, Motors, Continuous Current | From:SeekIC

Although the index input bycontinuous current of LMD 18245 is less than 1/3 of SA60, it can adopt various connection methods to control the motor in different ways, so as to get different control performances. Following picture shows the motors example driven by bipolar input. Therein , the chopping time is 1.1RC. RW refers to the current sensor resistance. UREF is the reference voltage of D/A inverted circuit, D is the input voltage of D/A inverted voltage.IS is the maxmium current of the motor. Distinguished from SA60, there is no PWM circuit in the LMD 18245 Chip. An exterior contrller is needed to control the rotation speed and rotation direction through the duty cycle of PWM. The connection method has been presented in following picture.



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