AH291-YG-13

AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Description 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. 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. The AH291 is available in SIP4 and SOT89-5L packages. Pin Assignments (Top View) 291 1 : Vdd 2 : DO 3 : DOB 4 : GND 12 3 4 (Top View) Vdd 1 2 291 5 NC GND DO 3 7 DOB 4 SOT89-5L SIP-4L Features • • • • • • • • 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 Applications • • Two-coil BLDC cooling fans Low to medium voltage, low power BLDC motors Typical Application Circuit (Note 1) 1.8V/5.75V Vdd D2 D1 291 L2 L1 1 2 3 4 GND C3 DO Notes: DOB 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. R1 C1 R2 C2 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 Vdd DO DOB GND NC Description Input Power Output Pin Output Pin Ground Not Connected Functional Block Diagram Vdd Lock detect, shutdown and automatic re-start Regulator DO H all 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 PD TST TJ Characteristics Operating Supply Voltage Output Current IO(AVE) IO(PEAK) SIP-4L SOT89-5L SIP-4L SOT89-5L Rating 8 400 400 700 550 800 -55 ~ 150 150 Unit V mA mA mA mW mW °C °C Power Dissipation Storage Temperature Maximum Junction Temperature Recommended Operating Conditions Symbol Vdd TA Notes: Characteristic Supply Voltage (Note 2) Operating Ambient Temperature Conditions Operating Operating Min 1.8 -20 Max 5.75 100 Unit 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 Characteristics Supply Current Rotor Lock Protection On Time Rotor Lock Protection Off Time Output Saturation Voltage Output On Resistance Output Zener-Breakdown Voltage Conditions Operating Min 2.4 Typ. 2.6 0.4 3 300 600 1.75 15 Max 4.0 3.6 Unit mA Sec Sec mV mV ohm V VOUT ( SAT ) RDS(ON) Vz Truth Table INH L - IO = 180mA IO = 350mA IN+ L H - CT L L H OUT1 H L off OUT2 L H off Mode 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) (1mT = 10 Gauss) Max Unit 60 Gauss Gauss Gauss Symbol Bop Brp Bhy Notes: Characteristics Operation Point Release Point Hysteresis Min -60 - Typ. 30 -30 60 3. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering. Operating Characteristics DOB DO Output Voltage in Volts Output Voltage in Volts RP 12 10 8 6 4 OFF OFF 12 10 8 6 4 OP ON 2 OP VSAT RP 2 ON VSAT Brp 0 Bop Brp 0 Bop Magnetic Flux Density in Gauss Magnetic Flux Density in Gauss S Marking side S Marking side N ( SIP-4L ) N ( SOT89-5L ) AH291 Document number: DS31041 Rev. 8 - 2 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) P D ( mW ) 6 00 5 00 4 00 3 00 2 00 1 00 0 0 25 50 75 10 0 125 15 0 T A ( °C ) 25 550 105 198 50 440 110 176 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 P ow er D iss ipation Curv e (2) SOT89-5L TA (°C) PD (mW) TA (°C) PD (mW) 25 800 105 288 50 640 110 256 60 576 115 224 70 512 120 192 75 480 125 160 80 448 130 128 85 416 135 96 90 384 140 64 95 352 145 32 100 320 150 0 P D ( mW ) 900 800 700 600 500 400 300 200 100 0 -4 0 0 25 P ower Dissipation Curve 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 Package P : SIP-4L Y : SOT89-5L Device Package Code Y Packaging (Note 5, 6) SOT89-5L Green G : Green (Note 4) Packing B : Bulk 13 : Tape & Reel 13” Tape and Reel Part Number Quantity Suffix 2500/Tape & Reel -13 AH291-YG-13 Notes: Bulk Part Number Quantity Suffix NA NA 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 291 Y WW X Y : Year : 0~9 WW : Week : 01~52, "52" represents 52 and 53 week X : Internal Code : A~Z : Green (2) SOT89-5L ( Top View ) 5 4 7 291 Y W X 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 1 2 3 AH291 Document number: DS31041 Rev. 8 - 2 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 1.1士0.1mm 1.95士0.1mm 0.7 mm 1 2 3 4 Active Area Depth Package Dimension Sensor Location 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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