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參數(shù)資料
| 型號： | M54649L |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | DUAL Bi-DIRECTIONAL MOTOR DRIVER |
| 中文描述： | 雙雙定向電機(jī)驅(qū)動 |
| 文件頁數(shù)： | 4/4頁 |
| 文件大?。?/td> | 98K |
| 代理商： | M54649L |
DUAL Bi-DIRECTIONAL MOTOR DRIVER
M54649L
MITSUBISHI <CONTROL / DRIVER IC>
CAUTIONS
1. Input Circuit Format
For ON voltage (V
IH
), apply a voltage of 3.5V to V
CC1
. For OFF
voltage (V
IL
), apply a voltage of 0 to 1V.
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.
10k
GND
From internal
circuit
To internal circuit
V
CC1
5k
V
Z
7.8V
NC
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
μ
s.
2. Output Voltage Control
The output control circuit by V
R
pin is as shown in the diagram
below. A voltage almost equal to the voltage at V
R
pin is output (to
the high-level side).
The maximum output voltage is achieved with V
CC2
pin is opened, and the voltage is given by the following formula:
V
O
= V
CC1
-V
sat
(Tr1)-V
BE
(Tr2)-V
BE
(Tr3)
In this status, the output voltage can be controlled by varying V
CC1
.
V
CC1
when V
R
V
CC1
V
CC2
OUT
V
R
Tr3
Tr2
Tr1
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
d
) is calculated by the
following formula, with V
CC2
V
CC1
:
P
d
= V
CC1
xI
CC1
+I
O
{(V
CC2
-V
OH
)+V
OL
}
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 150C (125C min.),
this function works. When the IC is placed in the all output OPEN
mode, and the temperature goes down to 100C (125C 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.
Voltage between collector and emitter : V
CE
(V)
0
4
8
12
14
16
20
0
1.0
1.6
2.0
Time of continuity : 50msec
C
C
6. ASO Curve
–
～
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