FD178A/FD178B/FD178C Version : A.010 Issue Date: 2011/3/1 File Name : SP-FD178-A.010.doc Total Pages: 10 Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control ( 2 to 6.5 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 FD178A/FD178B/FD178C General Specifications Designed for rotation speed control of single coil DC brushless fans, the FD178 series motor drivers minimize external component count and integrate all the key features required for high efficiency and low noise fans. Specifically PWM control and soft switching are provided to control the rotation speed and reduce the audible noise. Internal circuit protection includes thermal shutdown with hysteresis, rotor lock protection, and reverse power polarity protection. Three frequency generation (FGR pin) options are provided for different fan configurations - FG (FGR signal following Hall sensor output frequency), FG/2 (divided by two version of FG), and RD (rotation detection) for FD178A, FD178B, and FD178C respectively. Features and Benefits z Support single-phase full wave Brushless DC Motor Driver z Built-in Hall sensor input signal amplifier PWM control circuit Low voltage startup (VDD=2V) High driving capability Lock detection and automatic self-restart Power polarity reverse protection Thermal shut down protection circuit z Thin, compact, highly reliable package (TSOT-28) z z z z z z Pin Description FD178A/FD178B/FD178C：TSOT-28 O1 VSS FGR HP O2 TSOT VDD PWM HN Package : TSOT-28 NO. NAME DESCRIPTION 1 O1 Output driving & sinking pin 1 2 VSS Ground pin Frequency generator or rotating detector FD178：FG 3 FGR FD178B：FG/2 FD178C：RD 4 5 6 7 8 HP HN PWM VDD O2 Hall sensor in+ Hall sensor inPWM control pin Power supply pin Output driving & sinking pin 2 Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control Version：A.010 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 FD178A/FD178B/FD178C Absolute Maximum Ratings ( Unless otherwise noted, VDD=5V, TA = 25 °C ) Characteristic Symbol Rating Unit Supply Voltage VDDM 6.5 V Operation Current IOUT 500 mA Output Current at Locked (TSOT-28) IOL1 1 A Maximum FGR Output Current IFGR_MAX 10 mA Maximum FGR Output Voltage VFGR_MAX 6.5 V Operating Temperature Range TOPR -30 ~ 85 °C Storage Temperature Range TSTG -65 ~ 150 °C Power Dissipation (TSOT-28) PD 568 mW Thermal Resistance, Junction to Ambient θJA_TSOT28 220 °C/ W Thermal Resistance, Junction to Case θJC_TSOT28 92 °C/ W Tj(max) 150 °C Maximum Junction Temperature Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control Version：A.010 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：2 FD178A/FD178B/FD178C Electrical Characteristics ( Unless otherwise noted, VDD=5V, TA = 25 °C ) Limit Characteristic Sym. Condition Unit Min. Typ. Max. 2 5 6.5 V 3 5 mA Operation Voltage VDD - Supply Current Maximum Output Voltage Range Minimum Output Voltage Range Icc - VOH IOUT = 250 mA 4.5 4.65 - V VOL IOUT = 250 mA - 0.35 0.5 V FG Output Low Voltage VFGROL IFGR= 5 mA - 0.25 0.4 V Hall Amplifier Offset VOffSet - -9 0 9 mV GIO - 45 48 51 dB TON TOFF - 110 0.75 150 1.05 190 1.35 ms Sec PWM input frequency VPWM - - 25 50 KHZ PWM input high level voltage*1 VIH - VIL - -0.3 0 0.2VDD V VDC - 400 - - mV VAm - 150 - - mV Input-Output Gain Automatic self-restart Lock detection on Time Lock detection off Time PWM signal control PWM input low level voltage*1 Hall signal output Hall average output DC voltage Hall amplitude of waveform voltage *1 0.55VDD VDD VDD+0.4 V Description in the page4 “PWM input high and low level voltage” Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control Version：A.010 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 FD178A/FD178B/FD178C Thermal shut down protection circuit Shut down temperature - 160 180 200 ℃ Release temperature - 120 140 160 ℃ Truth Table PWM Hall input O1 O2 L X L L H HP > HN H L H HP < HN L H O1, O2 VDD VPWM VIL,max VIH,min Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control Version：A.010 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 FD178A/FD178B/FD178C Hall Signal For a stable operation, the Hall sensor output is required to meet the following conditions. (a) The DC level of Hall signal is greater than 400 mV (b) The amplitude of Hall signal is greater than 150mV HP or HN VAmplitude ＋ VDC － Application Circuit The connection of the capacito between VDD and GND will increase stability of operation, if required. Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control Version：A.010 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 FD178A/FD178B/FD178C Output Waveform PWM HP HN O1 O2 PWM control PWM HP HN O1 O2 Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control Version：A.010 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 FD178A/FD178B/FD178C Application Notes The device can be operated with a wide supply voltage ranging from 2 to 6.5 Volts. However, the design, specifications, and performance have been optimized for 5V brushless dc motor applications. The output driver node O1/O2 are in drive/sink state when V(HP) > V(HN) and vice versa The lock and auto-restart do not require an external capacitor for a timing counting purpose. The driver will be shutdown approximately 1 second after the motor is lock and the auto-restart is activated every one second until the lock is released. Eliminating an external protection diode, a power polarity reverse circuit is integrated on the chip. A 1uF capacitor between VDD and GND as well as a 0.1uF between HP and HN are strongly recommended for a reliable and noise immune operation. The power dissipated by the chip varies with the supply voltage. It is advisable to ensure the power dissipation by the chip does not exceed the thermal requirement dictated by the package. The maximum allowable power consumption can be calculated by the following equation: Pd ( Power Dissipation)(Watt ) = Tj ( Junction Temperature)(max)(oC ) − Ta ( Ambient Temperature)(oC ) θ JA (Thermal Re sis tan ce, Junction to Ambient )(oC / Watt ) The relationship between power dissipation and operating temperature can refer to the figure below: Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control Version：A.010 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：7 FD178A/FD178B/FD178C Package Specifications FD178 : TSOT-28 ８０× × G 80××G ：FD178A 8B××G ：FD178B 8C××G ：FD178C ×× is the run code. G is Green. VARIATION(ALL DIMENSIONS SHOWN IN MM) SYMBOL MIN. NOM. MAX. A 0.750 0.800 A1 0 0.050 A2 0.700 0.750 0.775 b 0.220 0.380 c 0.100 0.200 D 2.800 2.900 3.000 E 2.600 2.800 3.000 E1 1.500 1.600 1.700 e 0.650 BSC e1 1.950 BSC L 0.370 0.450 0.600 L1 0.600 REF L2 0.250 BSC R 0.100 R1 0.100 0.250 θ 0o 4o 8o θ1 4o 10o 12o Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control Version：A.010 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：8 FD178A/FD178B/FD178C 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. Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control Version：A.010 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：9