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UNISONIC TECHNOLOGIES CO., LTD SK6406/G
2-PHASE DC-FAN MOTOR PRE-DRIVER IC
LINEAR INTEGRATED CIRCUIT
DESCRIPTION
SK6406 is a 2-phase pre-driver IC for dc-fan motors, providing the functions of motor lock protection, auto-restart, and rotation detection signal output. SK6406 is with RD option and SK6406G with FG.
SOP-8
FEATURES
* Wide supply voltage range of 2.5V to 30V * Lock protection * Auto-restart when the motor lock is undone * RD(latch-type lockup detection) output (SK6406) * FG(frequency generator) output (SK6406G)
*Pb-free plating product number: SK6406L/SK6406GL
APPLICATION
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* Dual Coil DC FAN Motor
ORDERING INFORMATION
Order Number Normal Lead Free Plating SK6406-S08-R SK6406L-S08-R SK6406-S08-T SK6406L-S08-T SK6406G-S08-R SK6406GL-S08-R SK6406G-S08-T SK6406GL-S08-T
Package SOP-8 SOP-8 SOP-8 SOP-8
Packing Tape Reel Tube Tape Reel Tube
www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd
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QW-R109-026,A
SK6406/G
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R109-026,A
SK6406/G
Vcc REGULATOR
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
OUT1 OUT2 CONTROL BLOCK Hysteresis amplifier
H+ H-
FG (SK6406G)
CT GND
LOCK PROTECTION AUTORESTART BLOCK
LOCK DET
RD (SK6406)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R109-026,A
SK6406/G
ABSOLUTE MAXIMUM RATINGS (Ta = 25℃)
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL RATINGS UNIT Supply Voltage VCC 2.5V ~ 30V V Hall Input Common Mode Voltage Range VHIC 1.0 ~ Vcc-0.5 V Circuit Current IOUT 80 mA Power Dissipation PD 700 mW Operating Ambient Temperature TOPR -20 ~ +85 ℃ Storage Temperature TSTG -55 ~ +150 ℃ Note 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.
ELECTRICAL CHARACTERISTICS (Ta=25℃, VCC=12V)
PARAMETER SYMBOL ICC ICT1 ICT2 RCT VCT1 VCT2 VOL VHin VRDL IRD VFGL IFG IFGL TEST CONDITIONS CT=L In drive mode CT=H VCT= 1.1V VCT= 1.1V RCD=ICT1/ICT2 MIN TYP 3.2 3.2 3.45 0.8 4.5 2.6 0.6 10.5 MAX UNIT 8.7 mA 5 mA 5.25 uA 1.45 uA 8 3 V 0.8 V V 15 0.1 20 0.1 20 50 0.3 0.3 mV V mA V mA uA
Current Drain Lockup Detection Capacitor Charge Current Capacitor Discharge Current Charge/Discharge Ratio CT Charge Voltage CT Discharge Voltage Output High Level Voltage Hall Input Sensitivity RD Output Pin Low Voltage (SK6406) RD Current Capacity (SK6406) FG Low Voltage (SK6406G) FG Driver Capacity (SK6406G) FG Leakage Current (SK6406G)
IOUT= 10 mA Zero peak value (including offset and hysteresis) IRD=5mA VRDL=2V IFG=5mA VFGL=2V VFGL=15V
2 0.35 3 2.2 0.4 10 3
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 6
QW-R109-026,A
SK6406/G
TYPICAL APPLICATION CIRCUIT(SK6406)
LINEAR INTEGRATED CIRCUIT
*Same value of hall bias resistors is selected for R1 and R2
LOCKUP PROTECTION / AUTOMATIC RECOVERY
UNISONIC T.