M54544AL Datasheet, PDF (4/4 Pages) Mitsubishi Electric Semiconductor – Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION AND THERMAL SHUT DOWN FUNCTION

MITSUBISHI <CONTROL / DRIVER IC>
M54544AL
Bi-DIRECTIONAL MOTOR DRIVER
WITH BRAKE FUNCTION AND THERMAL SHUT DOWN FUNCTION
CAUTIONS
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.
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. 10µs.
APPLICATION EXAMPLES
1) When VCC and VCC’ are used as the same power supply
R2=3Ω
VB
C
10 – 100µF
Input 2
VCC2
R1=2Ω
VCC’2
M
VCC’1
Input 1
VCC1
987 654321
M54544AL
2) When VCC is used as a fixed power supply and VCC’ is used as
a variable power supply
VCC
2Ω
C
10 – 100µF
VCC’2
Input 2
VCC2
987
C
1 – 10µF
M
65432
Input 1
VCC1
1
M54544AL