M54687FP Mitsubishi, M54687FP Datasheet - Page 6

• Manufacturer Part Number: M54687FP
• Description: Bi-DIRECTIONAL MOTOR DRIVER WITH GOVERNOR
• Manufacturer: Mitsubishi

CAUTIONS
(1) Oscillation may take place with the setting of RT>K
(2) Add a capacitor of 0.1 F to the portion between PSCs to
(3) Add a capacitor of 10 F to the portion between V
(4) At a low temperature, RT>K
(5) When the supply voltage is low, note that saturation of the
When the back electromotive force is large with the brakes applied,
for example, malfunction may occur in internal parasitic Di. If
flyback current of 1A or more flows, add Schottky Di to the portion
between the output and the GND.
When the IC is used at a high speed for PWM etc., note that
switching of output results in delay of approx. 10 s.
R K Ra.
reduce brush noise of the motor.
to reduce brush noise and back electromotive noise of the
motor.
characteristics of resistance Ra of the motor. When oscillation
takes place, use resistance with a temperature coefficient for
RT.
output transistor of the IC may prevent the rotating speed for
control. Taking into account motor noise etc., set constants in
the following range.
2.0V
•
= V
V
CC
CC
- {RT
- (EC+Ia
•
IB + V
•
Ra)
ref
(1+
•
Ra is set due to temperature
RT
RS
)+
RT
K
•
Ia}
CC
•
and GND
Ra. Set
Bi-DIRECTIONAL MOTOR DRIVER WITH GOVERNOR
TYPICAL CHARACTERISTICS
2.0
1.5
1.0
0.5
Thermal Derating (Absolute Maximum Rating)
MITSUBISHI <CONTROL / DRIVER IC>
0
0
Operating Temperature Ta (˚C)
25
When mounted in board
50
M54687FP
75
100