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ST1155A
Version Issue Date File Name Total Pages : A.05 : 2003/03/18 : ST1155A_A05.doc
:7
Low-saturation, Low-voltage Bi-directional Motor Driver
SILICON TOUCH TECHNOLOGY INC.
9-4F-3 Prosperity Road I Science-Based Industrial Park Hsinchu, Taiwan 300, R.O.C. Tel886-3-5645656 Fax886-3-5645626
SILICON TOUCH TECHNOLOGY INC.
ST1155A
ST1155A 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 ( VDD min = VS1 min = VS2 min = 1.5V ) Low saturation voltage ( Upper transistor + low transistor residual voltage; 0.3V typ. at 400mA; 0.6V typ. at 750mA) Parallel connection ( two-channel driver: Upper transistor + low transistor residual ; 0.4V typ. at 800mA ) Separate control logic power supply and motor driver power supply High output sinking and driving capability Thin, highly reliable package (SOP-14)
Pin Assignment
VDD ENA1 O1 VS1 O2 IN1 GND 1 2 3 4 5 6 7 14 13 12 GND ENA2 O3 VS2 O4 IN2 NC
ST1155A
11 10 9 8
ST1155A_A05.doc
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SILICON TOUCH TECHNOLOGY INC.
ST1155A
DESCRIPTION
PIN NO. PIN NAME 1 2 3 4 5 6 7 8 9 10 11 12 13 14 VDD ENA1 O1 VS1 O2 IN1 GND NC IN2 O4 VS2 O3 ENA2 GND
Power supply pin for controller. Input pin that enable/disable drivers O1/O2. Output sinking / driving pin. Power supply pin for output driver O1/ O2. Output sinking / driving pin. Input pin that determines driving mode Ground pin No connecting Input pin that determines driving mode. Output sinking / driving pin. Power supply pin for output driver O3/ O4. Output sinking / driving pin. Input pin that enable/disable drivers O3/O4. Ground pin
Absolute Maximum Ratings ( Unless otherwise noted, TA= 25 )
Characteristic Supply Voltage Input Voltage IO Peak connection) Current (in parallel Symbol VDD VS VIN IOPeak PD TOPR TSTG Rating 5.5 3.5 VDD+0.4 3 800 -40 ~ 125 -65 ~ 150 Unit V V V A mW C C
Power Dissipation Operating Temperature Range Storage Temperature Range
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SILICON TOUCH TECHNOLOGY INC.
ST1155A
Electrical Characteristic
(Unless otherwise noted, TA= 25 & VDD = VS = 3V )
Characteristic Sym. VDD VS IDD0 IDD1 VENA1, 2=0V, VIN1,2=0V or 3V VENA1, 2=3V, VIN1,2=0V or 3V Condition Limit Min. 1.5 1.5 Typ. 3 3 0.1 0.05 Max. 5.5 5.5 10 0.5 Unit V V A mA
Supply Voltage
Supply Current ( IDD + IS )
ENA1 / ENA2 / IN1 / IN2 Input Terminal ( TJ = 25) Input Voltage "H" Input Voltage "L" Input Current "H" Input Current "L" VIH VIL IIH IIL VIN = VDD VIN = 0 V 0.8*VDD -0.4 VDD+0. 4 0.2*VDD 5 5 V V A A
O1 / O2 / O3 / O4 Output Terminal ( TJ = 25) VOUT1 VOUT2 Output Voltage (upper + lower) VOUT3 VOUT4 VOUT5 Output Resistance Output Sustaining Voltage Ron IOUT = 200 mA IOUT = 400 mA IOUT = 750 mA IOUT = 400 mA ( parallel connection ) IOUT = 800 mA ( parallel connection ) VDD=VS=3V, IOUT=400 mA 0.2 0.3 0.6 0.2 0.4 0.75 0.3 0.6 0.95 0.35 0.7 VS V V V V V V
VO(SUS) IOUT = 400 mA
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SILICON TOUCH TECHNOLOGY INC.
ST1155A
Truth Table
IN1 / IN2 L H H L ENA1 / ENA2 H H L L O1 / O3 H L OFF OFF O2 / O4 L H OFF OFF Mode Forward Reverse Standby Standby
Block Diagram & Application Circuit
RVDD VDD VS2 VS1 1 11 4 O1 M1 IN1 6 5 O2
10F
ENA1
2
3
Control
O3 ENA2 13 12 M2 IN2 9 10 O4
NC
8
GND
7
14 GND
ST1155A_A05.doc
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SILICON TOUCH TECHNOLOGY INC.
ST1155A
Application Notes
To increase system stability, it is suggestion to connect a resistor RVDD about 470 between battery power and driver's VDD pin as shown on application circuit. In multiple power supply application, although power supply of control logic and motor driver are separated, the voltage of VDD pin must be lager than or equal to the voltage of VS1 and VS2 pin. The power dissipated by the IC varies widely with the supply voltage, the output current, and loading. It is important to ensure the application does not exceed the allowable power dissipation of the IC package. The recommended motor driver power dissipation versus temperature is depicted as follows:
Power Dissipation-Temperature
900 800 700 600 500 400 300 200 100 0 0 25 50 75 Ambient Temperature ( ) 100 125
Power Dissipation ( mW )
ST1155A_A05.doc
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SILICON TOUCH TECHNOLOGY INC.
ST1155A
Package Specifications(SOP-14)
(14-pin SOP )
ST1155A xxxxxx*
D
E
H
C
L
7(4X)
A2
A
A1 y B e
SYMBOL A A1 A2 B C D E e H L Y
Dimensions in Millimeter MIN 1.35 0.10 0.33 0.19 8.55 3.8 5.8 0.40 0 NOM 1.27 MAX 1.75 0.25 0.51 0.25 8.75 4.0 6.2 1.27 0.10 8
Dimensions in Inches MIN 0.0532 0.0040 0.013 0.0075 0.3367 0.1497 0.2264 0.016 0 NOM 0.050 MAX 0.0688 0.0098 0.020 0.0098 0.3444 0.1574 0.2440 0.050 0.004 8
* The package marking "xxxxxx" is a lot number, and therefore being subject to change.
The products listed herein are designed for ordinary electronic applications, such as electrical appliances, audio-visual equipment, communications devices and so on. Hence, it is advisable that the devices should not be used in medical instruments, surgical implants, aerospace machinery, nuclear power control systems, disaster/crime-prevention equipment and the like. Misusing those products may directly or indirectly endanger human life, or cause injury and property loss. Silicon Touch Technology, Inc. will not take any responsibilities regarding the misusage of the products mentioned above. Anyone who purchases any products described herein with the above-mentioned intention or with such misused applications should accept full responsibility and indemnify. Silicon Touch Technology, Inc. and its distributors and all their officers and employees shall defend jointly and severally against any and all claims and litigation and all damages, cost and expenses associated with such intention and manipulation.
ST1155A_A05.doc
Version: A.05
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