11-CT211 Version Issue Date File Name Total Pages : A.004 : 2011/12/06 : SP-CT211-A.004.doc :7 FAN TACHOMETER IC 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. Tel：886-3-5645656 Fax：886-3-5645626 11-CT211 11-CT211 FAN TACHOMETER IC General Specifications The fan tachometer IC is designed for dividing a fan driver output frequency by 1.5, 2, 2.5 or 3. The dividing factor (1.5, 2, 2.5 or 3) is determined by the input selection pins, S1 and S0. With suitable output pull up, the fan tachometer output can be used directly with bipolar or MOS logic for motor speed monitoring/control. Pin Assignment HIN S0 Pin NO. Pin Name 1 VDD 2 HIN 3 S0 4 FG 5 GND 6 S1 * TXXX* VDD S1 GND FG Description Power supply pin Input pin for a fan driver’s output Input selection pin for a dividing factor Digital tachometer output pin ( open-drain ) Ground pin Input selection pin for a dividing factor The "TXXX" is a package marking of 11-CT211 where "T" is the product identification code for fan Tachometer ICs and "XXX" is a lot number, and therefore being subject to change. SP-CT211-A.004.doc Version：A.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page：1 11-CT211 Features and Benefits z z z Optimized for Brushless DC Motor applications Thin, high reliability package (SOT-26) Low voltage operation down to 1.5 Volts Absolute Maximum Ratings ( Unless otherwise noted, TA= 25℃ ) Characteristic Output Terminal Breakdown Voltage Supply Voltage Input Voltage ( S0, S1 ) Output Current ( FG ) Power Dissipation Operating Temp. Range Symbol VBD VDD VIN IOUT PD TOPR Rating 8 6.5 VDD+0.4 30 15 -25 ~ 100 Unit V V V mA mW TSTG -55 ~ 150 °C Storage Temp. Range °C Electrical Characteristic ( TA= 25℃ & VDD= 5V ) Item Sym. Conditions Supply Voltage VDD Quiescent Current IDD Input : ( HIN, S0, S1 ) Input Voltage “H” VIH Input Voltage “L” VIL Input Current “H” IIH Input Current “L” IIL Open-Drain Output : ( FG ) Output Leakage Current IOleak Output Current IOUT Output Voltage High VOH Output Voltage Low VOL SP-CT211-A.004.doc Limits Units Min Typ Max Operating No load, All Inputs = 0V or VDD 2 5 6.5 V - 0.8 1.0 mA - 0.8VDD - VDD+0.4 -0.4 - 0.2VDD VIN = VDD VIN = 0V - - ±20 - - ±20 V V μA μA VOUT = 5V VOL = 0.2V IOUT = 10 mA - - 15 21 - - - 0.1 Version：A.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. μA 30 mA VDD+0.4 V 0.2 V 5 Page：2 11-CT211 Block Diagram VDD FG MUX LOGIC HIN S0 S1 GND Truth Table S1 S0 Duty Cycle Dividing Factor 0 0 66.67% 1.5 0 1 50% 2 1 0 60% 2.5 1 1 50% 3 Time Diagram C ase 1 O1 S1 S0 Tacho C ase 2 O1 S1 S0 Tacho C ase 3 O1 S1 S0 Tacho C ase 4 O1 S1 S0 Tacho SP-CT211-A.004.doc Version：A.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page：3 11-CT211 Application Note 1. 2. 3. The S0 and S1 pins of 11-CT211 are connected to either GND or VDD according to the dividing factor. It is advisable to have a bypass capacitor or Zener Diode between VDD and GND as shown in the block diagram. The connection of this capacitor or Zener Diode will increase the maximum operating voltage and enhance the reliability for Brushless DC Motor application. 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 ( ℃ ) Test Circuit VDD FG HIN *1 10kΩ VDD HIN S0 SW 0 S1 GND FG *2 SW 1 *1 The input HIN is connected to a square wave signal ( 100Hz ~ 1KHz ) from a function generator. *2 Switch SW0 and SW1 are used to select a dividing factor. SP-CT211-A.004.doc Version：A.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page：4 11-CT211 Package Specifications ( SOT-26 ) SP-CT211-A.004.doc Version：A.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page：5 11-CT211 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. Silicon Touch Technology, Inc. reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. SP-CT211-A.004.doc Version：A.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page：6