M54649L Mitsubishi Electronics America, Inc., M54649L Datasheet - Page 4

• Manufacturer Part Number: M54649L
• Description: Dual Bi-directional Motor Driver
• Manufacturer: Mitsubishi Electronics America, Inc.

CAUTIONS
1. Input Circuit Format
For ON voltage (V
voltage (V
When the input voltage is approx. 7.8V or more, the impedance
changes to approx. 5 k . Therefore, set the voltage to 7V or less.
2. Output Voltage Control
The output control circuit by V
below. A voltage almost equal to the voltage at V
the high-level side).
The maximum output voltage is achieved with V
pin is opened, and the voltage is given by the following formula:
V
In this status, the output voltage can be controlled by varying V
3. Caution for Braking
As soon as the status of a rotating motor is switched to the brake
status, other motor may be adversely affected. Be careful when
the IC is actually used.
4. Allowable Power Dissipation
The allowable power dissipation of IC (P
following formula, with V
P
Make a design in such a way that the power dissipation cannot
exceed the maximum allowable power dissipation.
5. Thermal Shutdown
To prevent thermal breaking with excessive power applied, this IC
is equipped with a thermal shutdown circuit.
When the temperature of the IC chip reaches 150˚C (125˚C min.),
this function works. When the IC is placed in the all output OPEN
mode, and the temperature goes down to 100˚C (125˚C max.), this
function is released.
Since the thermal protection function of this IC may not work in
abnormal status (oscillation, low supply voltage, output short-
circuit, etc.), check the operation in the IC installation status when
using this function.
O
d
NC
= V
= V
CC1
CC1
xI
IL
-V
–
), apply a voltage of 0 to 1V.
CC1
sat
7.8V
V
(Tr1)-V
+I
5k
Z
O
IH
{(V
), apply a voltage of 3.5V to V
BE
CC2
(Tr2)-V
CC2
Tr1
-V
OH
V
10k
)+V
CC1
BE
Tr2
R
(Tr3)
OL
:
pin is as shown in the diagram
}
Tr3
d
) is calculated by the
V
V
OUT
V
CC1
CC2
R
CC2
R
pin is output (to
CC1
V
To internal circuit
From internal
circuit
GND
V
CC1
CC1
. For OFF
when V
CC1
R
.
6. ASO Curve
7. Others
The capacitance between the power supply and the ground should
be placed at a position close to the IC, if possible. If it is placed far
away from the IC, oscillation may take place.
When the motor 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.
2.0
1.6
1.0
0
0
DUAL Bi-DIRECTIONAL MOTOR DRIVER
MITSUBISHI <CONTROL / DRIVER IC>
4
Voltage between collector and emitter : V
8
12
14
M54649L
Time of continuity : 50msec
16
CE
(V)
20