ST1114E / ST1114K / ST1114P Version : A.011 Issue Date : 2003/09/26 File Name : SP-ST1114EKP-A.011.doc Total Pages : 7 Double Coil Brushless DC Motor Driver ( 1.8 to 16 Volts ) SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路九號七樓之一 9-7F-1 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 SILICON TOUCH TECHNOLOGY INC. ST1114E/ST1114K/ST1114P ST1114E / ST1114K / ST1114P Double Coil Brushless DC Motor Driver ( 1.8 to 16 Volts ) General Specifications The devices are designed specifically for electronic commutation of double coil DC motor applications. There are intended to be used as an interface between a HALL effect latch and a double coil load. Each device includes a fan tachometer, a lock detection circuit to shut down the drivers for overheat prevention, and two drivers for sinking large load on a single silicon chip. The fan tachometer is designed for fan speed output as open-drain output with a built-in pull-up resistor about 100KΩ and these devices are designed for different applications, ST1114E is for 4 poles fan application, ST1114K is for 8 poles fan application and ST1114P is for rotation detection output. With suitable output pull up resistance, this fan tachometer output can be used directly with bipolar or MOS logic for motor speed monitoring/control. The output driver node “O1” will be “turned to sink” for V(HIN) = logic low. Similarly, the output node “O2” will be “turned to sink” for V(HIN) = logic high. The devices also provide lock and auto-restart function without any timing capacitor. 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. For 12V application, 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-ST1114EKP-A.011 Version：A.011 Page：1 點晶科技股份有限公司 ST1114E/ST1114K/ST1114P SILICON TOUCH TECHNOLOGY INC. Pin Assignment O1 VDD Pin NO. Pin Name 1 VDD O2 GND HIN FGR Description Power supply pin 2 O2 Output sinking pin 3 HIN Input pin from Hall Latch IC Output pin of fan tachometer (open-drained with an pull-up resistor about 100KΩ) 4 FGR 5 GND 6 O1 FG : ST1114E (The frequency is same with the HIN frequency. ) FG/2 : ST1114K (The frequency is the half HIN frequency.) RD : ST1114P (Rotation detection output) Ground pin Output sinking pin Features and Benefits z z z z z z z Optimized for double coil Brushless DC Motor applications Wide operation range (1.8V ~ 16V ) Lock detection and automatic self-restart Tachometer output or Rotation Detector Output FG output for ST1114E, FG/2 output for ST1114K, RD output for ST1114P Support for 3V/5V/12V supply voltage High output sinking capability Thin, small, highly reliable package (SOT-26) Absolute Maximum Ratings Parameter ( Unless otherwise noted, TA= 25℃ ) Symbol Rating Unit VDD 1.8 ~ 16 V Input Voltage VIN -0.4 ~ VDD+0.4 V Maximum Output Current IOUT 800* mA Power Dissipation PD 0.35 W Operating Temperature Range TA -40 ~ 125 °C Storage Temperature Range TS -65 ~ 150 °C Supply Voltage * Power dissipation and operating temperature must be concerned for lager current application. SP-ST1114EKP-A.011 Version：A.011 Page：2 點晶科技股份有限公司 ST1114E/ST1114K/ST1114P SILICON TOUCH TECHNOLOGY INC. Electrical Characteristic ( TA = 25℃ & VDD = 12 V ) Characteristic Sym. Condition Supply Voltage VDD Operating Quiescent Current IDD No load, All Inputs = 0V or VDD Min. Limit Typ. Max. 1.8 12 16 V - 5 - mA Unit HIN Input Terminal Input Voltage “H” VIH - 0.8*VDD - VDD V Input Voltage “L” VIL - -0.4 - 0.2*VDD V Input Current “H” IIH VHIN = VDD - - ±5 μA Input Current “L” IIL VHIN = 0V - 1.6 - mA O1/O2 Output Terminal ( TJ = 25℃) Output Voltage Low VOL IOUT = 250 mA - 0.4 0.8 V Output Current IOUT RL = 60Ω - 188 - mA - - 5 μA 10 - - mA - - 15 V - 0.2 0.4 V ms TACHO Open-Drain Terminal ( TJ = 25℃) Output Leakage Current ILeak VFGO = 12V Output Current IFG VFGOL = 0.4V Output Voltage High VFGOH - Output Voltage Low VFGOL IFG= 10 mA Automatic Self-Restart Circuit On Period TON - - 156 - Duty Ratio RDR TOFF / TON 6 7 8 SP-ST1114EKP-A.011 Version：A.011 Page：3 點晶科技股份有限公司 ST1114E/ST1114K/ST1114P SILICON TOUCH TECHNOLOGY INC. Truth Table State HIN O1 O2 Operation H OFF ON Operation L ON OFF Lock protection H/L OFF OFF Self restart* H OFF ON Self restart* L ON OFF *The motor will be powered up by turn on output drivers for a period about 156ms per 1.25sec (at VDD = 12V) through self-restart mechanism after the motor is locked. Block Diagram & Application Circuit POWER To Controller Power R1 VDD FG VDD FG TACHO GENERATOR O1 HALL IC HIN GND SP-ST1114EKP-A.011 LOGIC BLOCK + - O2 LOCK DETECTION and PROTECTION Version：A.011 Page：4 點晶科技股份有限公司 ST1114E/ST1114K/ST1114P SILICON TOUCH TECHNOLOGY INC. Application Notes The FGR pin is an open-drained output with built-in pull-up resistor about 100K Ω and outputs the same frequency with HIN pin for ST1114E, the half frequency of HIN pin for ST1114K, and rotation detection result for ST1114P. An additional resistor can be used to pull up the FGR voltage to the appropriate level which depends on the voltage level of the monitoring/control system. For the ST1114P, the output of RD is at logical low state when fan is operating and logical high state when fan is lock. The resistor R1 connected between system power and VDD of HALL IC and driver increase system stability. The suggestion value of R1 is about 75Ω for 12V application. There is no requirement of the capacitor between VDD and GND in normal applications. The connection of this capacitance will increase stability of operation, special when the motor is operating at large current or low voltage. 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 400 Power Dissipation ( mW ) 350 300 250 200 150 100 50 0 0 25 50 75 100 125 150 Ambient Temperature ( ℃ ) SP-ST1114EKP-A.011 Version：A.011 Page：5 點晶科技股份有限公司 ST1114E/ST1114K/ST1114P SILICON TOUCH TECHNOLOGY INC. Package Specifications ( SOT-26 ) (6-pin SOT-26 ) C Knnn* E H L e θ1 D A2 A A1 b SYMBOL Dimensions in Millimeters MIN NOM MAX A A1 0.90 0.00 1.10 － 1.30 0.15 A2 b C D E e 0.70 0.30 0.08 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 0.30 2.80 － 3.00 － θ1 0° 5° 9° *Note : The "Knnn" is the package marking where the first character is the product identification code shown as following table, the next 3 characters "nnn" are date code or lot number, and therefore being subject to change. Product identification code ST1114E ST1114K ST1114P E K P The products listed herein are designed for ordinary electronic applications, such as electrical appliances, audio-visual equipments, communication 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 equipments 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-ST1114EKP-A.011 Version：A.011 Page：6