AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER General Description Features • • • • • • On Chip Hall Sensor Rotor-Locked Shutdown Automatically Restart Built-in Zener Protection for Output Driver Operating Voltage: 1.8V~5.75 V Output Current: IO( AVE ) = 400 mA • Lead Free Packages: SIP-4L and SOT89-5L 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. Ordering Information AH291 - X X X Package P: SIP-4L Y: SOT89-5L Note: 1. Lead Packing L : Lead Free -B : -7/-13 : Bulk Taping RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Lead-free Lead-free Device Package Code Packaging (Note 2) AH291-P AH291-Y P Y SIP-4L SOT89-5L Tube/Bulk Part Number Suffix 1000 -B NA NA Quantity 7” Tape and Reel Part Number Suffix NA NA 2500/Tape & Reel -13 Quantity Note: 2. 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. AH291 Rev. 3 1 of 10 www.diodes.com JANUARY 2007 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Pin Assignment Front View 291 Vdd 1 1 : Vdd 2 : DO GND 2 5 NC AH291 3 : DOB DO 3 4 : GND 1 2 3 74 DOB 4 SIP-4L SOT89-5L Pin Descriptions Name Vdd DO DOB GND NC AH291 Rev. 3 Description Input Power Output Pin Output Pin Ground Not Connected 2 of 10 www.diodes.com JANUARY 2007 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Block Diagram ( SIP-4L ) Vdd 1 Lock Shutdown and Automatic Recovery Regulator Hall Plate 2 DO 3 DOB Control Logic Amp. 4 GND Typical Application Circuit 1.8V/5.75V D2 V dd 291 D1 1 2 3 L2 L1 R1 R2 C1 C2 4 GND C3 DOB DO Notes: R1, R2: typical 56 O C1, C2, C3: typical 2.2μ F The R, C value need to be fine tuned based on coils design. 1.8V/5.75V Brush-Less DC Fan AH291 Rev. 3 3 of 10 www.diodes.com JANUARY 2007 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Absolute Maximum Ratings ( TA = 25°C ) Characteristics Symbol Operating Supply Voltage Rating Vdd IO(AVE) IO(PEAK) Output Current Power Dissipation SIP-4L SOT89-5L PD Operating Temperature Storage Temperature Maximum Junction Temperature Topr Tstg Tj Unit 8 400 700 550 800 -20 ~ 100 -55 ~ 150 150 V mA mW °C °C °C ( TA = 25 °C, Vdd = 5V, unless otherwise specified ) Electrical Characteristics Characteristics Symbol Conditions Min. Typ. Max. Unit Supply Voltage Vdd 1.8* - 5.75 V Supply Current Lock Protection On Lock Protection Off Idd Operating Operating 2.4 - 2.6 0.4 3 300 600 1.75 15 4.0 3.6 - mA Sec Sec Tlrp-on Tlrp-off Output Saturation Voltage VOUT (SAT ) Output On Resistance Output Zener-Breakdown Voltage *Note: IO = 180mA IO = 350mA Rds(on) Vz mV ohm V 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. Truth Table INH L - AH291 Rev. 3 IN+ L H - CT L L H OUT1 H L off OUT2 L H off 4 of 10 www.diodes.com Mode Rotating Rotating Lockup protection activated JANUARY 2007 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Magnetic Characteristics ( TA = 25 °C, Vdd = 5V, unless otherwise specified ) ( 1mT = 10 Gauss ) Characteristics Symbol Min. Typ. Max. Unit Bop Brp Bhy --60 -- 30 -30 60 60 --- Gauss Gauss Gauss Operation Point Release Point Hysteresis Operating Characteristics RP DO 12 Output Voltage in Volts Output Voltage in Volts DOB OFF 10 8 6 4 ON 2 OP VSAT 8 6 4 2 RP ON VSAT B rp 0 Bop M a g n e tic F lu x D e n s ity in G a u s s S S Marking side Marking side N AH291 Rev. 3 OP 10 B rp 0 Bop M a g n e tic F lu x D e n s ity in G a u s s ( SIP4 ) 12 OFF N ( SOT89-5 ) 5 of 10 www.diodes.com JANUARY 2007 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Performance Characteristics (1) SIP-4L 25 550 105 198 TA (°C) PD (mW) TA (°C) PD (mW) 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 o w e r D iss ip a tio n C u rve P D (m W ) 600 500 400 300 200 100 0 0 25 50 75 100 125 150 T A (°C ) (2) SOT89-5L TA (°C) 25 50 60 70 75 80 85 90 95 100 PD (mW) 800 640 576 512 480 448 416 384 352 320 TA (°C) 105 110 115 120 125 130 135 140 145 150 PD (mW) 288 256 224 192 160 128 96 64 32 0 P D (mW ) Power Dissipation Curve 900 800 700 600 500 400 300 200 100 0 0 25 50 75 100 125 150 T A (°C) AH291 Rev. 3 6 of 10 www.diodes.com JANUARY 2007 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Marking Information (1) SIP-4L ( Front View ) Part Number Internal Code a~z : Lead Free 291 Y WW X x Y :Year: "1" = 2001 "2" = 2002 WW : Nth week 01~52 X : Internal Code: A~Z (2) SOT89-5L 4 7 5 Y : Year: 0-9 M : Month: A~L 291 Y M X 1 AH291 Rev. 3 2 X : Internal code a~z : Lead Free 3 7 of 10 www.diodes.com JANUARY 2007 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Package Information (unit: mm) (1) SIP-4L Active Area Depth Package Sensor Location Marking side 1.97mm 1.04mm 1 0.7mm 2 3 4 Package Dimension AH291 Rev. 3 8 of 10 www.diodes.com JANUARY 2007 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Package Information ( Continued ) (2) SOT89-5L Sensor Location AH291 Rev. 3 9 of 10 www.diodes.com JANUARY 2007 © Diodes Incorporated AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated. AH291 Rev. 3 10 of 10 www.diodes.com JANUARY 2007 © Diodes Incorporated