UNISONIC TECHNOLOGIES CO., LTD SK6908 LINEAR INTEGRATED CIRCUIT 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. 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 *Pb-free plating product number: SK6908L ORDERING INFORMATION Ordering Number Normal Lead Free Plating SK6908-S08-R SK6908L-S08-R SK6908-S08-T SK6908L-S08-T SK6908-SH2-R SK6908L-SH2-R SK6908-SH2-T SK6908L-SH2-T Package Packing SOP-8 SOP-8 HSOP-8 HSOP-8 Tape Reel Tube Tape Reel Tube SK6908L-S08-R (1)Packing Type (2)Package Type (3)Lead Plating www.unisonic.com.tw Copyright © 2007 Unisonic Technologies Co., Ltd (1) R: Tape Reel, T: Tube (2) S08: SOP-8, SH2: HSOP-8 (3) L: Lead Free Plating, Blank: Pb/Sn 1 of 6 QW-R109-025.B SK6908 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION OUT2 1 8 GND FG 2 7 OUT1 CT 3 6 H- VCC 4 5 H+ BLOCK DIAGRAM FG output REGULATOR Vcc CONTROL BLOCK H+ OUT 1 H- OUT 2 Hysteresis Amplifier CT LOCK PROTECTION AUTORESTART BLOCK UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TSD GND 2 of 6 QW-R109-025.B SK6908 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta = 25℃) PARAMETER SYMBOL VCC ICC IO IFG Supply Voltage Supply Current Circuit Current FG Output Current RATINGS 20 20 600 20 UNIT V mA mA mA Power Dissipation SOP-8 700 mW PD (Derate at Ta=25℃ reduce 5.5mW/℃) HSOP-8 1000 mW Output Voltage VOUT 20 V Hall Input Common Mode Voltage Range VHIC 1.0 ~ Vcc-0.5 V Operating 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) SYMBO L PARAMETER Current Drain ICC 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 ICT1 ICT2 RCT VCT1 VCT2 VOL VOH Hall Input Sensitivity VHIN Hall Input-Output Gain FG Output Pin Low Voltage FG Output Pin Leakage Current GHO VFG IFG(LEAK) CONDITIONS In drive mode (CT=L) In lockup protection mode (CT=H ) V 1PIN = 1.1V V 1PIN = 1.1V IO=200mA IO=200mA Zero peak value (including offset and hysteresis) MIN TYP MAX UNIT 2 0.3 3.9 3 320 IFG=5mA VFG=15V 8 4.1 2.8 0.5 5.6 1.9 0.7 0.3 4.1 500 0.3 0 4 0.8 0.7 mA mA uA uA V V V V 15 mV 680 0.5 10 V uA HALL SINGLE INPUT-OUTPUT TRUTH VALUE TABLE H+ H L HL H OUT1 H L OUT2 L H FG H L * CT=0V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R109-025.B SK6908 LINEAR INTEGRATED CIRCUIT LOCKUP PROTECTION / AUTOMATIC RECOVERY Fig. 1 H+ OUT1 Toff Ton VCT1 VCT2 depend on the hall output FG motor lock detect lock Ton (charge time) = C × (VCT1-VCT2) ICT1 lock cancel Toff (charge time) = release C × (VCT1-VCT2) ICT2 C : Value of capcitor at CT terminal UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R109-025.B SK6908 LINEAR INTEGRATED CIRCUIT POWER DISSIPATION Fig.-2 The maximum junctions temperature is 150°C in plastic packages, but for reasons of reliability, a lower number may be mandated. PT = TJ(MAX) – Ta (MAX) / θJA PT = Total Power Dissipated by the Device TJ (MAX) = Maximum Junction Temperature Ta(MAX) = Maximum Ambient Temperature θJA = 175°C/W THERMAL SHUTDOWN (TSD) Fig.-3 OUTPUT OFF TSD ON TSD ON ( Typ : 175℃ ) TSD OFF ( Typ : 150℃ ) OUTPUT ON TSD OFF 150℃ 175℃ Junction Temperature (℃) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R109-025.B SK6908 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT 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.B