11-MD125
Version
:
A.003
Issue Date
:
2004/09/01
Total Page
:
12
2 Channel Low Saturation
& Constant Current DC 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-MD125
11-MD125
2 Channel Low Saturation
& Constant Current DC Motor Driver
General Specifications
The 11-MD125 is a 2-channel DC driver with one channel constant current mode (forward,
reverse and stand-by function ) and the other channel saturation mode(forward, reverse, brake and
stand-by function). The 11-MD125 is specifically designed for DSC lens shutter (constant current) /
iris (saturation voltage) or shutter (constant current) / zoom DC motor (saturation voltage), or other
portable devices. The constant current can be varied by an external resistor and two constant current
level can be selected through input control pin. Its design is optimized for use in camera solenoid
coil and DC motor.
Features and Benefits
Low voltage operation ( V
DD Min
= V
B Min
= 2.5V )
Low saturation voltage ( Upper transistor + low transistor residual voltage; 0.4V typ. at
300mA , V
DD
= V
B
= 3V)
Low input current
Constant current control
Two constant current level selection
Reference Voltage inside (Vref=1.23V)
Thermal shutdown protection
Thin, highly reliable package (SSOP-20 , TSSOP20)
Pin Assignment
IN1
IN2
IN3
IN4
IN5
IAD
VREF
HO1
NC
CF
VB2
SG
PG
VO1
VO2
IO1
IO2
IM
VDD
VB1
SP-MD125-A.003
Version
：
A.003
Page
：
1
點晶科技股½有限公司
SILICON TOUCH TECHNOLOGY INC.
11-MD125
Pin NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin Name
IN1
IN2
IN3
IN4
IN5
IAD
VREF
HO1
NC
CF
VB1
VDD
IM
IO2
IO1
VO2
VO1
PG
SG
VB2
Description
Input pin start constant current mode
Input pin that determines forward/reverse mode
Holding 1 output pin (output current settling)
Input pin that determines DC driving mode
Input pin that determines DC driving mode
AMP positive input pin
Reference voltage output pin
Holding 1 output pin (output current settling)
No connection
Oscillation protech capacitance
Power supply pin for constant current output driver
Power supply pin for controller.
Current sense resistor
Current driving 2
Current driving 1
DC driving 2
DC driving 1
Driver ground
Controller ground
Power supply pin for DC output driver
Absolute Maximum Ratings
( Unless otherwise noted, T
A
= 25
℃
)
Characteristic
Supply Voltage
Input Voltage
I
O
Peak Current
I
ODC
Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Symbol
V
DD
V
B
V
IN
I
OPeak
I
ODC
P
D
T
OPR
T
STG
Rating
5.5
7
V
DD
+0.4
1.5
0.45
700
-40 ~ 125
-65 ~ 150
Unit
V
V
V
A
A
mW
°C
°C
SP-MD125-A.003
Version
：
A.003
Page
：
2
點晶科技股½有限公司
SILICON TOUCH TECHNOLOGY INC.
11-MD125
Electrical Characteristic
(Unless otherwise noted, T
A
= 25
℃
& V
DD
= V
B
= 3V )
Characteristic
Sym.
V
DD
V
B
I
STB
Supply Current
( I
DD
)
I
ACT1
I
ACT2
I
ACT3
Reference Voltage Circuit
Reference Voltage
HO1 Voltage
Vref
V
HO1
R
VREF
= 30k, V
DD
= 3V
R
HO1
= 30k, V
DD
= 3V
1.10
1.10
1.23
1.23
1.27
1.27
V
V
V
IN1, IN4, IN5
=L
V
IN1
=H, V
IN4, IN5
=L
V
IN1
=L, V
IN4, IN5
≠L
V
IN1
=H, V
IN4, IN5
≠L
Condition
Limit
Min.
2.5
2.5
Typ.
3
3
0.1
0.4
0.2
0.5
Max.
5.5
5.5
1
1
1
1
Unit
V
V
μA
mA
mA
mA
Supply Voltage
ENA / IN1 / IN2 / IN3 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
0.8*V
DD
-0.4
-
-
-
-
-
-
V
DD
+0.4
0.2*V
DD
±5
±5
V
V
μA
μA
IO1 / IO2 Output Terminal ( T
J
= 25℃)
Output Current1
Output Current1
Output Voltage
(upper + lower)
I
O1
I
O2
V
OUT
IAD = 0.3V, R
IM
= 1Ω
IAD = 0.2V, R
IM
= 1Ω
I
OUT
= 300 mA
282
188
-
300
200
0.4
318
212
0.8
mA
mA
V
VO1 / VO2 Output Terminal ( T
J
= 25℃)
Output Voltage
(upper + lower)
V
OUT
R
Load
=10Ω
-
0.4
0.8
V
Thermal Protection Circuit
Protection Temperature T
TSD
V
IN1
=H, V
IN4, IN5
≠L
160
℃
SP-MD125-A.003
Version
：
A.003
Page
：
3
點晶科技股½有限公司
SILICON TOUCH TECHNOLOGY INC.
11-MD125
Truth Table
Constant current driving
INPUT
OUPUT
MODE
IN1
IN2
IN3
IO1
IO2
HO1
L
-
-
OFF
OFF
OFF
STANDBY
H/L
H
H/L
L/H
ON*
Shutter (Current 1)*
H
H/L
L
H/L
L/H
OFF*
Shutter (Current 2)*
- : Don’t care
*HO1 : ON
Output voltage=1.23V (= Vref).
: OFF Output = Impendence.
*The constant current level is dependent on the connections of external resistors R
IM
, R
A
, R
B
and
R
C
in the block diagram.
Saturation voltage driving
INPUT
OUPUT
MODE
IN4
IN5
VO1
VO2
L
L
OFF
OFF
STANDBY
L
H
L
H
REVERSE
H
L
H
L
FOWORD
H
H
H
H
BREAK
: If IN1=L, IN4=L and IN5=L, the driver will be shutdown and Vref become high impedence.
SP-MD125-A.003
Version
：
A.003
Page
：
4
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