AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Description Pin Assignments AH291 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. (Top View) (Top View) 291 Vdd 1 GND 2 1 : Vdd 2 : DO Rotor-lock shutdown detection circuit turns off the output driver when the rotor is blocked to avoid coil overheat. Then, the automatic recovery circuit will restart the motor. These protected actions are repeated and periodic during the blocked period. Until the blocking is removed, the motor recovers and runs normally. 3 : DOB 5 NC 291 DO 3 74 DOB 4 : GND 1 2 3 4 SOT89-5L SIP-4L The AH291 is available in SIP4 and SOT89-5L packages. Features Applications • • • • • • • • • • On Chip Hall Sensor Rotor-Locked Shutdown Automatically Restart Built-in Zener Protection for Output Driver Operating Voltage: 1.8V to 5.75V Output Current: IO(AVE)= 400mA Packages: SIP-4L and SOT89-5L Green Molding Compound Two-coil BLDC cooling fans Low to medium voltage, low power BLDC motors Typical Application Circuit (Note 1) 1.8V/5.75V D2 Vdd D1 291 1 2 3 L2 L1 R1 R2 C1 C2 4 GND C3 DOB DO Notes: 1. R1, R2: typical 56 Ohm C1, C2, C3: typical 2.2µF The R, C value need to be fine tuned based on coils design. 1.8V/5.75V Brush-Less DC Fan AH291 Document number: DS31041 Rev. 8 - 2 1 of 9 www.diodes.com June 2010 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Pin Descriptions Pin Name Description Vdd Input Power DO Output Pin DOB Output Pin GND Ground NC Not Connected Functional Block Diagram Vdd Lock detect, shutdown and automatic re-start Regulator DO Hall Plate Amp. Control Logic DOB GND AH291 Document number: DS31041 Rev. 8 - 2 2 of 9 www.diodes.com June 2010 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Absolute Maximum Ratings (TA = 25°C) Symbol Vdd IO Characteristics Operating Supply Voltage SIP-4L SOT89-5L IO(AVE) Output Current IO(PEAK) SIP-4L SOT89-5L PD Power Dissipation TST TJ Storage Temperature Maximum Junction Temperature Rating Unit 8 400 400 700 550 800 -55 ~ 150 150 V mA mA mA mW mW °C °C Recommended Operating Conditions Symbol Vdd TA Notes: Characteristic Supply Voltage (Note 2) Operating Ambient Temperature Conditions Min Max Unit Operating Operating 1.8 -20 5.75 100 V °C 2. The output of IC will be switched after the supply voltage is over 1.8V, but the magnetic characteristics won't be normal until the supply is over 2.0V. Electrical Characteristics (TA = 25 °C, Vdd = 5V, unless otherwise specified) Symbol Idd TRLP-ON TRLP-OFF VOUT ( SAT ) RDS(ON) Vz Characteristics Conditions Supply Current Rotor Lock Protection On Time Rotor Lock Protection Off Time Operating IO = 180mA IO = 350mA Output Saturation Voltage Output On Resistance Output Zener-Breakdown Voltage Min Typ. Max Unit 2.4 - 2.6 0.4 3 300 600 1.75 15 4.0 3.6 - mA Sec Sec mV mV ohm V Truth Table IN- IN+ CT OUT1 OUT2 Mode H L - L H - L L H H L off L H off Rotating Rotating Lockup protection activated AH291 Document number: DS31041 Rev. 8 - 2 3 of 9 www.diodes.com June 2010 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Magnetic Characteristics (TA = 25 °C, Vcc = 24V, unless otherwise specified, Note 3) Symbol Bop Brp Bhy Notes: Characteristics Operation Point Release Point Hysteresis Min Typ. -60 - 30 -30 60 (1mT = 10 Gauss) Max Unit 60 - Gauss Gauss Gauss 3. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering. Operating Characteristics DO 12 RP Output Voltage in Volts Output Voltage in Volts DOB OFF 10 8 6 4 2 ON OP 0 4 2 RP 0 Bop S Marking side ( SIP-4L ) ON Magnetic Flux Density in Gauss S Document number: DS31041 Rev. 8 - 2 6 Brp Magnetic Flux Density in Gauss AH291 8 Bop N OP 10 VSAT VSAT Brp 12 OFF Marking side N ( SOT89-5L ) 4 of 9 www.diodes.com June 2010 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Performance Characteristics (1) SIP-4L TA (°C) PD (mW) TA (°C) PD (mW) 25 550 105 198 50 440 110 176 P D (mW ) 60 396 115 154 70 352 120 132 80 308 125 110 85 286 130 88 90 264 135 66 95 242 140 44 100 220 150 0 Pow er D iss ipation Curv e 6 00 5 00 4 00 3 00 2 00 1 00 0 0 25 (2) SOT89-5L TA (°C) PD (mW) TA (°C) PD (mW) 25 800 105 288 50 50 640 110 256 P D (mW ) 60 576 115 224 75 70 512 120 192 75 480 125 160 10 0 80 448 130 128 125 85 416 135 96 90 384 140 64 15 0 T A (°C ) 95 352 145 32 100 320 150 0 Power Dissipation Curve 900 800 700 600 500 400 300 200 100 0 -4 00 25 50 75 10 0 125 1 50 T A (°C) AH291 Document number: DS31041 Rev. 8 - 2 5 of 9 www.diodes.com June 2010 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Ordering Information AH 291 - X G - X Device AH291-YG-13 Notes: Package Green Packing P : SIP-4L Y : SOT89-5L G : Green (Note 4) B : Bulk 13 : Tape & Reel Package Code Packaging (Note 5, 6) Y SOT89-5L Bulk Part Number Quantity Suffix NA NA 13” Tape and Reel Part Number Quantity Suffix 2500/Tape & Reel -13 4. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 5. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. 6. Reverse taping as shown on Diodes Inc. Surface Mount (SMD) Packaging document AP02007, which can be found on our website http://www.diodes.com/datasheets/ap02007.pdf. Marking Information (1) SIP-4L ( Top View ) Part Number Y : Year : 0~9 WW : Week : 01~52, "52" represents 52 and 53 week X : Internal Code : A~Z : Green 291 Y WW X (2) SOT89-5L ( Top View ) 4 7 5 291 Y W X 1 AH291 Document number: DS31041 Rev. 8 - 2 2 Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : Internal code A~Z : Green 3 6 of 9 www.diodes.com June 2010 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Package Outline Dimensions (All Dimensions in mm) (1) Package type: SIP-4L Marking side 1.95士0.1mm 1.1士0.1mm 1 0.7 mm 2 3 4 Sensor Location Active Area Depth Package Dimension AH291 Document number: DS31041 Rev. 8 - 2 7 of 9 www.diodes.com June 2010 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Package Outline Dimensions (Continued) (2) Package type: SOT89-5L Sensor Location AH291 Document number: DS31041 Rev. 8 - 2 8 of 9 www.diodes.com June 2010 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 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