Stepper Motor Driver IC
MTD2018G
■Block diagram / Typical application
Vcc
Vcc
Vmm
2
4
6
3
10
7
9
11
CPU
or
GATE
ARRAY
CPU
or
GATE
ARRAY
Vcc1
OUT1A
Vmm1
Vmm2
OUT2A
Vcc2
OUT1B
OUT2B
PHA2
PHA1
1
12
Vcc
R1
VREF1
VREF2
VREF1
1/10
1/10
16
21
Vr
Vr
VREF2
R2
TSD
Current
Current
120deg
170deg
Sensor
Sensor
-
+
ONE
SHOT
ONE
SHOT
-
+
UVLO
STB
I1 1
I0 1
CR1
Vs1
SENSE1 GND STB
GND
SENSE2
Vs2
CR2
I0 2
I1 2
23
24
20
22
5
18
19
TAB
8
15
17
13
14
Rf A
Rf B
Cf B
STB
signal
CPU
or
GATE ARRAY
CPU
or
GATE ARRAY
Ct A
Rt A Cf A
Rs A
Rs B
Rt B
CtB
●Constant chopping current level
●Recommended component values
Symbol
Ct
Recommended component values
Unit
pF
VREF
Ichop =
− 0.015
3300
4.7
10Rs
Rt
kΩ
pF
Cｆ
820
1.0
Rf
kΩ
●ONE SHOT OFFꢀTIME
Toff =1.1CtRt
Shindengen Electric Mfg.Co.Ltd
W1002
SHINDENGEN [ SHINDENGEN ELECTRIC MFG.CO.LTD ]
