11-MD124
Version
Issue Date
File Name
Total Pages
:
A.008
:
2004/12/20
:
SP-11-MD124-A.008.doc
:7
Low-saturation, Low-voltage
Bi-directional Motor Driver
新竹市展業一路 9 號 4 樓之 3
SILICON TOUCH TECHNOLOGY INC.
9-4F-3, Prosperity Rd I, Science-Based Industrial Park
Hsinchu, Taiwan, R.O.C.
Tel：886-3-5727171
Fax：886-3-5727390
點晶科技股½有限公司
SILICON TOUCH TECHNOLOGY INC.
11-MD124
11-MD124
Low-saturation, Low-voltage
Bi-directional Motor Driver
General Specifications
The device is a two-channel low-saturation bi-directional motor driver IC. The design is
optimal for stepper-motor applications, such as cameras, printers, FDDs, or other portable
devices.
Features and Benefits
Low voltage operation ( V
DD min
= 1.5V )
Low saturation voltage
Optimal for 2 phase excitation drive for 2-phase stepping motors
High output sinking and driving capability
Thin, highly reliable package (MSOP10, DFN10)
Pin Assignment
MSOP10
O4
VDD
GND
O3
O1
1
2
3
4
5
10
9
8
7
6
IN1
IN2
O2
GND
EN
PIN NO. PIN NAME
1
2
3
4
5
O4
VDD
GND
O3
O1
EN
GND
O2
IN2
IN1
DESCRIPTION
Output sinking / driving pin.
Power supply pin.
Ground pin
Output sinking / driving pin.
Output sinking / driving pin.
Input pin that determines driving mode
Ground pin
Output sinking / driving pin.
Input pin that determines driving mode.
Input pin that determines driving mode.
DFN10
O4
VDD
GND
O3
O1
1
2
3
4
5
10
9
8
7
6
IN1
IN2
O2
GND
EN
SP-MD124-A.008
11-MD124
xxxxxx
6
7
8
9
10
Version
：
A.008
-1-
點晶科技股½有限公司
SILICON TOUCH TECHNOLOGY INC.
11-MD124
Absolute Maximum Ratings
( Unless otherwise noted, T
A
= 25
℃
Characteristic
Supply Voltage
Input Voltage
I
ODC
Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Symbol
V
DD
V
IN
I
ODC
P
D
T
OPR
T
STG
)
Unit
V
V
mA
mW
°C
°C
Rating
6.0
V
DD
+0.4
500
486
-40 ~ 125
-65 ~ 150
Electrical Characteristic
(Unless otherwise noted, T
A
= 25
℃
Characteristic
Supply Voltage
Supply Current
Sym.
V
DD
I
DD
V
EN, IN1, IN2
= 0V
Condition
& V
DD
= 3V )
Limit
Min.
1.5
Typ.
3
0.2
Max.
6
0.5
Unit
V
μA
EN / IN1 / IN2 Input Terminal ( T
J
= 25℃)
Input Voltage “H”
Input Voltage “L”
Input Current “H”
Input Current “L”
V
IH
V
IL
I
IH
I
IL
-
-
V
IN
= V
DD
V
IN
= 0 V
0.5*V
DD
-0.4
-
-
-
-
-
-
V
DD
+0.4
0.2*V
DD
±5
±5
V
V
μA
μA
O1 / O2 / O3 / O4 Output Terminal ( T
J
= 25℃)
Output Voltage
(upper + lower)
V
OUT0
V
OUT1
I
OUT
= 200 mA
I
OUT
= 400 mA
-
-
0.25
0.4
0.35
0.6
V
V
Truth Table
EN
L
H
Input pins
IN1
-
L
L
H
H
IN2
-
L
H
H
L
O1
OFF
H
H
L
L
Output pins
O2
O3
OFF OFF
L
H
L
L
H
L
H
H
O4
OFF
L
H
H
L
Notes
Standby
2-phase
excitation
SP-MD124-A.008
Version
：
A.008
-2-
點晶科技股½有限公司
SILICON TOUCH TECHNOLOGY INC.
11-MD124
Block Diagram & Application Circuit
R1*
2
EN
VDD
10μF
6
5
O1
Stepping
Motor
Micro-
Controller
IN1
10
8
Control
Block
IN2
9
4
O2
O3
1
O4
GND
3
GND
7
* R1 is recommended to 1Ω~ 2Ω.
Timing Chart
VDD
ENA
IN1
IN2
O1
O2
O3
O4
Stepping Motor 2-Phase Excitation
SP-MD124-A.008
Version
：
A.008
-3-
點晶科技股½有限公司
SILICON TOUCH TECHNOLOGY INC.
11-MD124
Application Notes
The GND pin 3 and pin 7 must both connect to system ground.
To increase system stability, connecting the resistor R1 about 1Ω ~ 2Ωbetween system power
and IC power supply VDD is recommended.
Typical Performance Curve
V
SAT
VS I
OUT
Output Saturation Voltage V
SAT
(V)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.1
0.2
0.3
0.4
0.5
VDD=3V
VDD=3V
VDD=5V
VDD=5V
V
IN
=V
DD
I
DD
VS V
DD
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
V
EN
=V
DD
Current Drain I
DD
(mA)
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5
Power Supply Voltage V
DD
(V)
Output Current I
OUT
(A)
SP-MD124-A.008
Version
：
A.008
-4-
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