Stepper Motor Driver IC
■Block diagram / Typical application
MTD2003B
Vcc=5V
Vcc Vcc OUT1 OUT2 VmmA VmmB OUT3
OUT4
IN1
IN2
I0
I1
Vcc
Rt
Ct
BLANK
QR
S
CR
Current
- Sensor
+
Current
Sensor -
+
RQ
S
PG
LG
Vref
VsA
RsA
RsB
VsB
Rs
Rs
IN4
IN3
Vcc
Vr
I0
I1
●Constant chopping current level
Ichop
=
Vr
10×Rs
− 0.015
●ONE SHOT OFF TIME
f
=
1
0.72×Ct×Rt
●Recommended component values
Symbol
Recommended component values
Unit
Rt
18
kΩ
Ct
3300
pF
Vr
Vcc
V
Shindengen Electric Mfg.Co.Ltd
W1002