ST1111N Version : A.004 Issue Date : 2002/07/18 File Name : SP-ST1111N-A.004.doc Total Pages : 7 Single Coil Brushless DC Motor Drivers ( 1.5 to 7.5 Volts ) 新竹市科學園區展業一路 9 號 7 樓之 1 SILICON TOUCH TECHNOLOGY INC. 9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Fax：886-3-5645626 Tel：886-3-5645656 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. ST1111N ST1111N Single Coil Brushless DC Motor Drivers ( 1.5 to 7.5 Volts ) General Specifications The device is designed specifically for electronic commutation of single coil DC motor applications. They are intended to be used as an interface between HALL effect latch and a single coil load. Each device includes a power reverse protected diode, a fan tachometer for dividing the frequency of tachometer pulses from the driver with 2, a lock detection circuit to shut down the drivers for overheat prevention, and complementary bi-directional drivers for driving and sinking large load on a single silicon chip. Though the DC brushless motor driver can be started as low voltage as 1.5 Volt to 2 Volt and the device permits operation with supply voltage of 1.5 to 7.5 Volts, the design, specifications and performance have been optimized for 3V and 5V brushless DC motor applications. The output driver node O1/O2 will be “turned to sink/drive” for V(HIN) = logic low. Similarly, the output O1/O2 will be “turned to drive/sink” for V(HIN) = logic high . If the motor rotation is stalled by external force or obstacles, overdrive current ( or lock current ) may incur coil overheat/burning. To prevent coil overheat/burning, these devices incorporate lock detection circuit to shut down the drivers. After the motor locking is released, the drivers can be powered up using an automatic self-restart circuit. The drivers are shut down roughly 1 to 3 seconds after the motor is locked. After the drivers are shut down, the automatic self-restart circuit will try to power up the drivers every 1 to 3 seconds SP-ST1111N-A.004(2007-07-12) A.004 Page：1 Version ： 點晶科技股份有限公司 ST1111N SILICON TOUCH TECHNOLOGY INC. Pin Description VDD O2 HIN PIN NO. PIN NAME O1 GND FG DESCRIPTION 1 VDD Power supply pin 2 O2 Output sinking pin 3 HIN Input pin from Hall Latch IC 4 FG Output pin of fan tachometer (open-drain) 5 GND Ground pin 6 O1 Output sinking pin Features and Benefits z z z z z z z z ESD tolerance IC power outputs > 7,500 V ESD tolerance IC FG output > 4,500 V Optimized for single coil Brushless DC Motor applications Lock detection and automatic self-restart Tachometer output Built-in Reverse Protection High output sinking and driving capability Thin, highly reliable package (SOT-26) SP-ST1111N-A.004(2007-07-12) A.004 Page：2 Version ： 點晶科技股份有限公司 ST1111N SILICON TOUCH TECHNOLOGY INC. Absolute Maximum Ratings ( Unless otherwise noted, TA = 25 °C ) Characteristic Supply Voltage Input Voltage from a Hall Effect Latch Output Output Current Output Current at Lock Power Dissipation Symbol VDD VIN IOUT IOL PD Rating 7.5 VDD+0.4 400 700 350 Unit V V mA mA mW Operating Temperature Range TOPR -40 ~ 125 °C Storage Temperature Range TSTG -65 ~ 150 °C Electrical Characteristics ( TA= 25°C , VDD= 5V ) Characteristic Sym. Supply Voltage VDD Input Voltage “H” VIH Input Voltage “L” VIL Input Current “H” IIH Input Current “L” IIL Limit Condition Unit Min. Typ. Max. 1.5 5 7.5 V - 0.8*VDD - VDD+0.4 V - -0.4 - 0.2*VDD V VIN = VDD - - ±1 μA VIN = 0V - - ±5 mA Operating O1/O2 Output Terminal ( TJ = 25℃) Output Voltage High VOH IOUT = 300 mA 4.4 - - V Output Voltage Low VOL IOUT = 300 mA - - 0.6 V Output Current IOUT RL = 30Ω - 148 - mA - - 5 μA FG Open-Drain Terminal ( TJ = 25℃) Output Leakage Current Output Current Output Voltage Low ILeak VFG = 5V IFG VFGOL = 0.4V VFGOL IFG= 10 mA 10 - - mA - - 0.4 V ms Automatic Self-Restart Circuit On Time TON - - 215 - Duty Ratio RDR TOFF / TON 6 7 8 SP-ST1111N-A.004(2007-07-12) A.004 Page：3 Version ： 點晶科技股份有限公司 ST1111N SILICON TOUCH TECHNOLOGY INC. Truth Table HIN O1 O2 H H L L L H Block Diagram & Application Circuit POWER VDD POWER FG TACHO GENERATOR HALL LOGIC BLOCK HIN IC GND FG + DRIVERS - O1 O2 LOCK DETECTION SP-ST1111N-A.004(2007-07-12) A.004 Page：4 Version ： 點晶科技股份有限公司 ST1111N SILICON TOUCH TECHNOLOGY INC. Application Notes There is no requirement of protection diode for power reverse fault in normal applications. The reverse protection function is built-in. The FG pin is an open-drained output dividing the frequency sensed by HALL IC with 2. With suitable output pull up, the fan tachometer output can be used directly with bipolar or MOS logic for motor speed monitoring/control. There is no requirement of the bypass capacitor or Zener Diode between VDD and GND in normal applications. The connection of this capacitor or Zener Diode between VDD and GND will increase stability of operation, if required. 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 Power Dissipation (mW) 400 350 300 250 200 150 100 50 0 0 25 50 75 100 125 150 Ambient Temperature ( ℃ ) SP-ST1111N-A.004(2007-07-12) A.004 Page：5 Version ： 點晶科技股份有限公司 ST1111N SILICON TOUCH TECHNOLOGY INC. Package Specifications ( SOT-26 ) (6-pin SOT-26 ) C E H L e θ1 D A2 A A1 b SYMBOL Dimensions in Millimeters MIN NOM A A1 1.00 0.00 1.10 － MAX 1.30 0.10 A2 b C D E e 0.70 0.35 0.10 2.70 1.40 － 0.80 0.40 0.15 2.90 1.60 1.90(TYP) 0.90 0.50 0.25 3.10 1.90 － H L 2.60 0.37 2.80 － 3.00 － θ1 1° 5° 9° 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. SP-ST1111N-A.004(2007-07-12) A.004 Page：6 Version ：