Stepper Motor Driver IC
MTD Series
MTD1121F
Features
Unipolar PWM Stepper Motor Driver
● Unipolar stepper motor driver
● Constant current control function（Fixed OFF Time）
● Logic supply voltage 3.3V
● TTL, CMOS compatible input
● 4-Phase input (Simultaneous ON prevention function)
● Built-in flywheel diodes
● Surface mount package with heat sink(HSOP28)
HSOP28
■Absolute maxmum ratings / Ta=25℃
Parameter
Output voltage
Output current
Logic supply
Logic input
Power dissipation *
Storage temperature
Maximum Junction temperature
Symbol
V
CEO(SUS)
I
OUT
Vcc
V
LOGIC
P
D
Tstg
Tj
Rating
80
1.2
0∼3.6
0∼Vcc
3
-40∼150
150
Unit
V
A
V
V
W
℃
℃
*50.8×50.8×1mm
3
Glass Epoxy Board(FR4),250mm
2
Cupper Pattern
■Pin Assignment
MTD1121F
OUT A
Rs A
OUT A
NC
NC
NC
NC
1
2
3
4
5
6
7
■Truth table
TOP VIEW
28
27
26
25
24
23
22
IN A or B
L
PG A
IN A
IN A
Vs A
Vref A
CR A
Vcc
L
H
H
IN A or B
L
H
L
H
OUT A or B
OFF
OFF
ON
OFF
OUT A or B
OFF
ON
OFF
OFF
GND
GND
8
9
10
11
12
13
14
COM
NC
NC
NC
OUT B
Rs B
OUT B
21
20
19
18
17
16
15
LG
CR B
Vref B
Vs B
IN B
IN B
PG B
Shindengen Electric Mfg.Co.Ltd
W1001
SHINDENGEN [ SHINDENGEN ELECTRIC MFG.CO.LTD ]
