James C. Squire, Ph.D., P.E.

IC & Transistor Datasheets 

Motor Drivers

Device

#1

Input2

Output

Comments

 

 

 

Vmax

Imax

Type3
A3959  1 PWM 50V 3A Direct  
HIP4081  1 PWM 80V 2.5A Direct or FET App. notes 1, 2, 3 
L293  1 PWM 36V 1A Direct
L293D  1 PWM 36V 600mA Direct Has integral kickback diode
LMD18200  2 PWM 55V 3A Direct
LMD18245  2 4bit parallel 55V 3A Direct Motor is current-controlled
UCN5804  1 step 35V 1.25A Direct 4 phase unipolar stepper

 

 

 

 

 

 

 

 

 

Notes

All motors are brushed DC motors unless stated otherwise

  1. Number of full H bridge drivers per chip.
  2. For the brushed DC motors, the speed input to the chip may be PWM (a PWM modulated signal from 0-5V generated by a microcontroller), or an N-bit parallel binary code (e.g. 0000 to 1111 for stop to full speed).  For stepper motors, a step or half step occurs on each falling edge of the step input signal.  For both motor types, a separate bit specifies direction.
  3. The chip may have it's PWM output signal either directly connected to the motor or else it may drive external FET's that in turn drive the motor.  If they drive external FET's then the maximum current to the motor is a function of the FET used, not the Imax of the chip.