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| UNISONIC TECHNOLOGIES CO., LTD SK6908 SINGLE-PHASE DC-FAN MOTOR DRIVER DESCRIPTION SK6908 is a single-phase driver for dc-fan motors. It provides high efficiency, low noise output and supports the functions of motor lock protection, auto restart and rotation detection. LINEAR INTEGRATED CIRCUIT SOP-8 FEATURES *Wide supply voltage range of 2.5V to 20V *Output current IO(MAX)=600mA *Operate with Hall element *Lock protection *Auto-restart when the motor lock is undone *FG(frequency generator) output *Package type SOP-8 and HSOP-8 expose pan HSOP-8 *Pb-free plating product number: SK6908L ORDERING INFORMATION Order Number Normal Lead Free Plating SK6908-S08-R SK6908L-S08-R SK6908-S08-T SK6908L-S08-T SK6908-SM1-R SK6908L-SM1-R SK6908-SM1-T SK6908L-SM1-T Package SOP-8 SOP-8 HSOP-8 HSOP-8 Packing Tape Reel Tube Tape Reel Tube SK6908L-S08-R (1)Packing Type (2)Package Type (3)Lead Plating (1) R: Tape Reel, T: Tube (2) S08: SOP-8, SM1: HSOP-8 (3) L: Lead Free Plating Blank: Pb/Sn , www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co., Ltd 1 of 6 QW-R109-025,A SK6908 PIN CONFIGURATION LINEAR INTEGRATED CIRCUIT OUT2 1 2 8 7 GND OUT1 FG CT VCC 3 4 6 5 HH+ BLOCK DIAGRAM Vcc REGULATOR FG output H+ HHysteresis Amplifier CT CONTROL BLOCK OUT 1 OUT 2 LOCK PROTECTION AUTORESTART BLOCK TSD GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R109-025,A SK6908 ABSOLUTE MAXIMUM RATINGS (Ta = 25) PARAMETER Supply voltage Supply current Circuit current FG output current Power dissipation (Derate at Ta=25 reduce 5.5mW/) SOP-8 HSOP-8 LINEAR INTEGRATED CIRCUIT SYMBOL VCC ICC IO IFG RATINGS 20 20 600 20 UNIT V mA mA mA PD 700 mW PD 1000 mW Output Voltage VOUT 20 V Hall input common mode voltage range VHIC 1.0 ~ Vcc-0.5 V Operating ambient temperature TOPR -20 ~ +100(Note1) Storage temperature TSTG -55 ~ +150 Note 1.For operation in ambient temperatures above 25 ,the driver device must be derated based on a 150 maximum temperature Note 2.Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Note 3.The device is guaranteed to meet performance specification within 0~+70 operating temperature range and assured by design from -20~+100. ELECTRICAL CHARACTERISTICS (Ta=25 , VCC=5V) PARAMETER Current drain Lockup detection capacitor charge current Capacitor discharge current Capacitor charge/discharge current ratio CT charge voltage CT discharge voltage Output low level voltage Output high level voltage Hall input sensitivity Hall input-output gain FG output pin low voltage FG output pin leakage current SYMBOL ICC ICT1 ICT2 RCT VCT1 VCT2 VOL VOH VHIN GHO VFG IFG(LEAK) CONDITIONS In drive mode (CT=L) In lockup protection mode (CT=H ) V 1PIN = 1.1V V 1PIN = 1.1V MIN TYP MAX UNIT 8 mA 4.1 mA 2 2.8 4 uA 0.3 0.5 0.8 uA 5.6 1.9 V 0.7 V 0.3 0.7 V 3.9 4.1 V 3 320 IFG=5mA VFG=15V 500 0.3 0 15 680 0.5 10 mV V uA IO=200mA IO=200mA Zero peak value (including offset and hysteresis) HALL SINGLE INPUT-OUTPUT TRUTH VALUE TABLE H+ H L * CT=0V HL H OUT1 H L OUT2 L H FG H L UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R109-025,A SK6908 Fig. 1 LINEAR INTEGRATED CIRCUIT LOCKUP PROTECTION / AUTOMATIC RECOVERY H+ OUT1 Toff VCT1 Ton VCT2 depend on the hall output FG motor lock detect lock lock cancel release Ton (charge time) = C x (VCT1-VCT2) ICT1 Toff (charge time) = C x (VCT1-VCT2) ICT2 C : Value of capcitor at CT terminal UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R109-025,A SK6908 POWER DISSIPATION Fig.-2 LINEAR INTEGRATED CIRCUIT mW 1000 800 700 600 400 200 SK6908 Ta() To use at temperature above Ta =25 reduce 5.5mW/ The maximum junctions temperature is 150C in plastic packages, but for reasons of reliability, a lower number may be mandated. PT = TJ(MAX) - Ta (MAX) / JA PT = Total Power Dissipated by the Device TJ (MAX) = Maximum Junction Temperature Ta(MAX) = Maximum Ambient Temperature JA = l75C/W 25 50 75 85 100 125 150 175 THERMAL SHUTDOWN(TSD) Fig.-3 OUTPUT OFF TSD ON TSD ON ( Typ : 175 ) OUTPUT ON TSD OFF ( Typ : 150 ) TSD OFF 150 175 Junction Temperature () UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R109-025,A SK6908 TYPICAL APPLICATION CIRCUIT LINEAR INTEGRATED CIRCUIT Vcc Coil OUT2 FG output Vin 0.1f GND FG 0.0033f OUT1 SK6908 R1 HHall Element CT Vcc H+ UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R109-025,A |
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