AH281 Hall-Effect Smart Fan Motor Controller Features General Description - 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 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. - Package: SIP-4L, SOT89-5L Pin Assignment Pin Descriptions Front View 281 Name VCC DO DOB GND NC 1 : VCC 2 : DO 3 : DOB 1 2 3 4 4 : GND SIP-4L VCC 1 GND 2 Description Input power Output pin Output pin Ground Not connected 5 NC AH281 DO 3 74 DOB SOT89-5L Ordering Information AH281 X - X X X Wafer Body Package Lead Packing Blank or A~Z : if necessary to specify P: SIP-4L Y: SOT89-5L L : Lead Free Blank: Normal 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 Hall Plate 2 DO 3 DOB Control Logic Amp. 4 GND Application Circuit 12V VCC D1 C1 =10uF + L2 L1 281 1 2 3 4 GND DOB DO 12V brush-less DC fan Anachip Corp. www.anachip.com.tw Rev 0.7 Apr 16, 2004 2/7 AH281 Hall-Effect Smart Fan Motor Controller Absolute Maximum Ratings (Ta = 25°C) Characteristics Symbol Output Zener-breakdown Voltage Operating Supply Voltage Rating Vz VCC 38 28 300 400 550 800 -20 ~ 100 -55 ~ 150 150 IO(AVE) IO(PEAK) Output Current Power Dissipation SIP4 SOT89-5 PD Operating Temperature Storage Temperature Maximum Junction Temp. Unit Topr Tstg Tj V V mA mW °C °C °C Electrical Characteristics (Ta = 25 °C, VCC =12V, unless otherwise specified) Characteristics Symbol Conditions Min. Supply Voltage Vcc Operating 10 Supply current Operating - Locked Protection On Locked Protection Off Icc Tlrp-on Tlrp-off Output saturation voltage VOUT( sat ) Output On resistance Rds(on) IO=150mA IO=250mA - Typ. Max. 20 V 2.0 4.0 mA 0.4 2.4 375 625 2.6 Unit Sec Sec mV ohm Magnetic Characteristics (Ta = 25 °C, VCC = 12V, unless otherwise specified) (1mT=10 Gauss) Characteristics Symbol Min. Typ. Max. Unit Operate Point Release Point Hysteresis Bop Brp Bhy --60 -- 30 -30 60 60 --- Gauss Gauss Gauss Anachip Corp. www.anachip.com.tw Rev 0.7 Apr 16, 2004 3/7 AH281 Hall-Effect Smart Fan Motor Controller Operating Characteristics DO 12 RP Output Voltage in Volts Output Voltage in Volts DOB OFF 10 8 6 4 2 ON OP Vsat Brp 0 12 OFF OP 10 8 6 4 2 RP ON Vsat Bop Brp Magnetic Flux Density in Gauss 0 Bop Magnetic Flux Density in Gauss Performance Characteristics (SIP4) Ta (°C) 25 50 60 70 80 85 90 95 100 105 110 115 120 Pd (mW) 550 440 396 352 308 286 264 242 220 198 176 154 132 P o w e r D is s ip a tio n C u rve P d (m W ) 600 500 400 300 200 100 0 25 50 75 100 125 150 T a (。 C ) Anachip Corp. www.anachip.com.tw Rev 0.7 Apr 16, 2004 4/7 AH281 Hall-Effect Smart Fan Motor Controller Marking Information (1)SIP-4L ( Top View ) 281 X XX X X Part Number Blank : normal L : Lead Free Package ~ ID Code Nth week: 01~52 Year: "1" = 2001 "2" = 2002 (2)SOT89-5L 4 7 5 ID code A~Z: Non-Lead Free a~z : Lead Free M : Month: A~L Y : Year: 0-9 281 Y M X 1 2 3 Anachip Corp. www.anachip.com.tw Rev 0.7 Apr 16, 2004 5/7 AH281 Hall-Effect Smart Fan Motor Controller Package Information (1)SIP-4L Active Area Depth Package Sensor Location Marking side 1.97mm 1.04mm 1 0.7mm 2 3 4 Package Dimension o 5 -7 o 14.25mm +/-1.25mm 1.55mm +/-0.1mm 1.03mm +/-0.1 o o 3 -5 0.38mm +/-0.03mm 3.81mm +/-0.03mm 0.46mm +/-0.03mm 281 5.22mm +/-0.1mm 4.20mm +/-0.1mm o 0.38mm +/-0.03mm o 3.65mm +/-0.1mm 0.30mm +/-0.1mm 5 -7 o 3 -5 o 0.2mm Max. 1.42mm+/-0.1mm Anachip Corp. www.anachip.com.tw 1.27mm +/-0.03mm Rev 0.7 Apr 16, 2004 6/7 AH281 Hall-Effect Smart Fan Motor Controller (2)SOT89-5L A C D F B E 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 - Anachip Corp. www.anachip.com.tw 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 - Rev 0.7 Apr 16, 2004 7/7