MITSUBISHI <CONTROL / DRIVER IC>
M56755FP
SPINDLE MOTOR DRIVER
ELECTRICAL CHARACTERISTICS (VCC=5V, VM=12V, Ta=25˚C, Unless otherwise noted.)
Current limit
Reverse torque
+5 – +50mV
4.6A/V
0
EC - ECR
The relationship between the EC (control voltage),
ECR (reference voltage) and the torque is as
shown in Figure 1.
The current gain is 4.6A/V (at sensing resistor :
0.5ohm) in the both torques and a dead zone is
±5mV to ±50mV.
4.6A/V
-5 – -50mV
Forward Torque
Current limit
Figure 1. The characteristics of the control voltage and motor current (Torque).