ST1155B Version Issue Date File Name Total Pages : A.05 : 2003/03/18 : ST1155B_SSOP16_A05.doc :7 Low-saturation, Low-voltage Bi-directional Motor Driver SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路九號四樓之三 9-4F-3 Prosperity Road I Science-Based Industrial Park Hsinchu, Taiwan 300, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 點晶科技股份有限公司 ST1155B SILICON TOUCH TECHNOLOGY INC. ST1155B 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 (SSOP-16) Pin Assignment 1 16 GND ENA1 2 15 ENA2 O1 3 14 O3 VS1 4 13 VS2 VS1 5 12 VS2 O2 6 11 O4 IN1 7 10 IN2 GND 8 9 ST1155B ST1155B_SSOP16_A05.doc VDD Version: A.05 VREF -1- 點晶科技股份有限公司 ST1155B SILICON TOUCH TECHNOLOGY INC. PIN NO. PIN NAME DESCRIPTION 1 VDD Power supply pin for controller. 2 ENA1 Input pin that enable/disable drivers O1/O2. 3 O1 Output sinking / driving pin. 4 VS1 Power supply pin for output driver O1/ O2. 5 VS1 Power supply pin for output driver O1/ O2. 6 O2 Output sinking / driving pin. 7 IN1 Input pin that determines driving mode 8 GND Ground pin 9 VREF Reference Voltage output 10 IN2 Input pin that determines driving mode. 11 O4 Output sinking / driving pin. 12 VS2 Power supply pin for output driver O3/ O4. 13 VS2 Power supply pin for output driver O3/ O4. 14 O3 Output sinking / driving pin. 15 ENA2 Input pin that enable/disable drivers O3/O4. 16 GND Ground pin Absolute Maximum Ratings ( Unless otherwise noted, TA= 25℃ ) Characteristic Symbol Rating Unit VDD 5.5 V VS 3.5 V VIN VDD+0.4 V IOPeak 2 A PD 800 mW Operating Temperature Range TOPR -40 ~ 125 °C Storage Temperature Range TSTG -65 ~ 150 °C Supply Voltage Input Voltage IO Peak Current (in parallel connection) Power Dissipation ST1155B_SSOP16_A05.doc Version: A.05 -2- 點晶科技股份有限公司 ST1155B SILICON TOUCH TECHNOLOGY INC. Electrical Characteristic (Unless otherwise noted, TA= 25℃ & VDD = VS = 3V ) Characteristic Supply Voltage Sym. Condition Limit Unit Min. Typ. Max. VDD 1.5 3 5.5 V VS 1.5 3 5.5 V Supply Current IDD0 VENA1, 2=0V, VIN1,2=0V or 3V 0.1 10 μA ( IDD + IS ) IDD1 VENA1, 2=3V, VIN1,2=0V or 3V 0.05 0.5 mA ENA1 / ENA2 / IN1 / IN2 Input Terminal ( TJ = 25℃) Input Voltage “H” VIH - 0.8*VDD - VDD+0.4 V Input Voltage “L” VIL - -0.4 - 0.2*VDD V Input Current “H” IIH VIN = VDD - - ±5 μA Input Current “L” IIL VIN = 0 V - - ±5 μA O1 / O2 / O3 / O4 Output Terminal ( TJ = 25℃) VOUT1 IOUT = 200 mA - 0.2 0.3 V VOUT2 IOUT = 400 mA - 0.3 0.6 V Output Voltage VOUT3 IOUT = 750 mA - 0.6 0.95 V (upper + lower) VOUT4 IOUT = 400 mA ( parallel connection ) - 0.2 0.35 V VOUT5 IOUT = 800 mA ( parallel connection ) - 0.4 0.7 V - - VS V Output Sustaining Voltage VO(SUS) IOUT = 400 mA ST1155B_SSOP16_A05.doc Version: A.05 -3- 點晶科技股份有限公司 ST1155B SILICON TOUCH TECHNOLOGY INC. Truth Table IN1 / IN2 ENA1 / ENA2 O1 / O3 O2 / O4 Mode L H H L Forward H H L H Reverse H L OFF OFF Standby L L OFF OFF Standby Block Diagram & Application Circuit Battery System power RVDD VDD 10µF VS2 VS2 VS1 VS1 12 13 4 5 1 ENA1 2 3 IN1 7 6 O1 M1 O2 Control O3 ENA2 15 14 M2 IN2 10 11 VREF ST1155B_SSOP16_A05.doc 9 GND 8 Version: A.05 O4 16 GND -4- 點晶科技股份有限公司 ST1155B SILICON TOUCH TECHNOLOGY INC. Application Notes To increase system stability, it is suggestion to connect a resistor RVDD about 470Ω between battery power and driver's VDD pin as shown on application circuit. 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 ( mW ) Power Dissipation-Temperature 900 800 700 600 500 400 300 200 100 0 0 ST1155B_SSOP16_A05.doc 25 50 75 Ambient Temperature ( ℃ ) Version: A.05 100 125 -5- 點晶科技股份有限公司 ST1155B SILICON TOUCH TECHNOLOGY INC. Package Specifications(SSOP-16) 3.91 5.99 9 16 8 1 0.229 0.3Max 0.254 0.635 0.15 1.5 4.9 1.63MAX 0.635 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. ST1155B_SSOP16_A05.doc Version: A.05 -6-