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| AH281 Hall-Effect Smart Fan Motor Controller Features - On chip Hall sensor - Rotor-locked shutdown - Automatically restart - Built-in Zener protection for output driver - Operating voltage: 10V~20 V, driver start up: 8V (minimum) - Output current: IO( AVE ) = 300 mA - Package: SIP-4L, SOT89-5L General Description AH281 is a monolithic fan motor controller with Hall sensor's capability. It contains two complementary open-collector drivers for motor's coil driving, automatic lock shutdown and restart function relatively. To avoid coil burning, rotor-lock shutdown detection circuit shut down the output driver if the rotor is blocked and then the automatic recovery circuit will try to restart the motor. This function repeats while rotor is blocked. Until the blocking is removed, the motor recovers running normally. Pin Assignment 281 Front View 1 : VCC 2 : DO 3 : DOB 12 3 4 4 : GND Pin Descriptions Name VCC DO DOB GND NC Description Input power Output pin Output pin Ground Not connected SIP-4L VCC 1 GND 2 DO 3 SOT89-5L AH281 5 NC 7 DOB 4 Ordering Information AH281 X - X X X Wafer Body Blank or A~Z : if necessary to specify Package P: SIP-4L Y: SOT89-5L Lead L : Lead Free Blank: Normal Packing Blank : Tube or Bulk A : Tape & Reel This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev. 0.7 Apr 16, 2004 1/7 AH281 Hall-Effect Smart Fan Motor Controller Block Diagram (SIP4) VCC 1 Lock shutdown and Automatic recovery Regulator 2 Hall Plate DO Amp. Control Logic 3 DOB 4 GND Application Circuit 12V VCC D1 C1 =10uF + 281 L2 L1 1 2 3 4 GND DOB DO 12V brush-less DC fan Anachip Corp. www.anachip.com.tw 2/7 Rev 0.7 Apr 16, 2004 AH281 Hall-Effect Smart Fan Motor Controller Absolute Maximum Ratings Characteristics Output Zener-breakdown Voltage Operating Supply Voltage Output Current Power Dissipation Operating Temperature Storage Temperature Maximum Junction Temp. PD Topr Tstg Tj (Ta = 25C) Symbol Vz VCC IO(AVE) IO(PEAK) SIP4 SOT89-5 Rating 38 28 300 400 550 800 -20 ~ 100 -55 ~ 150 150 Unit V V mA mW C C C Electrical Characteristics (Ta = 25 C, VCC =12V, unless otherwise specified) Characteristics Supply Voltage Supply current Locked Protection On Locked Protection Off Output saturation voltage Output On resistance Symbol Vcc Icc Tlrp-on Tlrp-off VOUT( sat ) Conditions Operating Operating Min. 10 - Typ. 2.0 0.4 2.4 375 625 2.6 Max. 20 4.0 Unit V mA Sec Sec mV ohm IO=150mA IO=250mA - Rds(on) Magnetic Characteristics (Ta = 25 C, VCC = 12V, unless otherwise specified) (1mT=10 Gauss) Characteristics Operate Point Release Point Hysteresis Symbol Bop Brp Bhy Min. --60 -Typ. 30 -30 60 Max. 60 --Unit Gauss Gauss Gauss Anachip Corp. www.anachip.com.tw 3/7 Rev 0.7 Apr 16, 2004 AH281 Hall-Effect Smart Fan Motor Controller Operating Characteristics DOB Output Voltage in Volts Output Voltage in Volts RP 12 10 8 6 4 ON 2 OP Vsat Brp 0 Bop OFF OFF DO 12 10 8 6 4 RP Vsat Brp 0 Bop 2 ON OP Magnetic Flux Density in Gauss Magnetic Flux Density in Gauss Performance Characteristics (SIP4) Ta (C) 25 50 60 70 80 85 90 95 100 220 105 198 110 176 115 154 120 132 Pd (mW) 550 440 396 352 308 286 264 242 P d (m W ) 600 500 400 300 200 100 0 25 50 75 P o w e r D is s ip a tio n C u rve 100 125 150 T a ( C ) Anachip Corp. www.anachip.com.tw 4/7 Rev 0.7 Apr 16, 2004 AH281 Hall-Effect Smart Fan Motor Controller Marking Information (1)SIP-4L ( Top View ) Part Number 281 X XX X X Blank : normal L : Lead Free Package ID Code Nth week: 01~52 Year: "1" = 2001 "2" = 2002 ~ (2)SOT89-5L 5 4 7 281 Y M X 1 2 3 ID code A~Z: Non-Lead Free a~z : Lead Free M : Month: A~L Y : Year: 0-9 Anachip Corp. www.anachip.com.tw 5/7 Rev 0.7 Apr 16, 2004 AH281 Hall-Effect Smart Fan Motor Controller Package Information (1)SIP-4L Active Area Depth Marking side Package Sensor Location 1.97mm 1.04mm 0.7mm 1 2 3 4 Package Dimension 5 -7 1.55mm +/-0.1mm 1.03mm +/-0.1 0.30mm +/-0.1mm 3 -5 o o o 14.25mm +/-1.25mm 0.38mm +/-0.03mm o 3.65mm +/-0.1mm 0.46mm +/-0.03mm 0.38mm +/-0.03mm 3.81mm +/-0.03mm 5.22mm +/-0.1mm 4.20mm +/-0.1mm 5 -7 o o 3 -5 o o 281 0.2mm Max. 1.42mm+/-0.1mm 1.27mm +/-0.03mm Anachip Corp. www.anachip.com.tw 6/7 Rev 0.7 Apr 16, 2004 AH281 Hall-Effect Smart Fan Motor Controller (2)SOT89-5L A C D F E B K J F L I H G Package Sensor Location Y X Symbol A B C D E F G H I J K L X Y Dimensions In Millimeters Min. Nom. Max. 4.40 4.50 4.60 4.05 4.15 4.25 1.50 1.60 1.70 1.30 1.40 1.50 2.40 2.50 2.60 0.80 3.00 Ref. 1.50 Ref. 0.40 0.46 0.52 1.40 1.50 1.60 0.35 0.39 0.43 5o Typ. 1.90 1.65 - Dimensions In Inches Min. Nom. Max. 0.173 0.177 0.181 0.159 0.163 0.167 0.059 0.063 0.067 0.051 0.055 0.059 0.094 0.098 0.102 0.031 0.118 Ref. 0.059 Ref. 0.016 0.018 0.020 0.055 0.059 0.063 0.014 0.015 0.017 5o Typ. 0.075 0.065 - Anachip Corp. www.anachip.com.tw 7/7 Rev 0.7 Apr 16, 2004 |
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