LMD18400 for four-phase stepper motor drive

  
DMOS power switch ON-state resistance has a positive temperature coefficient, four switches can be arbitrarily parallel to increase the load current, and therefore a monolithic
LMD18400 for four-phase stepper motor drive - schematic

LMD18400 can drive one, two, four small DC motor. From the PWM control signal input terminal can be implemented now motor speed control, shown in Figure 11-12 and Figure 11-13. LM1951 is a high speed f of 50kHz) the high-side intelligent switching. It therefore provides the following fault protection and fault indication output: Output is shorted to ground or short to power on the positive and negative holy open circuit, over current, over voltage, over temperature. It is suitable for resistive and inductive load drive, 30V output is clamped inductive load make rapid discharge, the input control terminal of the TTL/( MOS compatible with ESD (Antistatic) protection.




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