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| AH293 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Features * * * * * * * * * On Chip Hall Sensor Rotor-Locked Shutdown Automatically Restart Rotor-State Detection (RD) Output Built-in Zener Protection for Output Driver Operating Voltage: 1.8V~5.75 V Output Current: IO( AVE ) = 400 mA Lead Free Finish/RoHS Compliant for Lead Free products (Note 1) Packages: SOT89-5L General Description AH293 is a monolithic fan motor controller with Hall sensor's capability. It contains two complementary open-collector transistors for Motor's coil driving, automatic lock current shutdown, and recovery protections. Also, rotor-state detection (RD) output is for speed detection. 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 AH293 - X X X Package Y: SOT89-5L Lead-Free L : Lead Free Packing -7/-13 : Taping Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Device Lead-free AH293-Y Package Code Y Packaging (Note 2) SOT89-5L 7" Tape and Reel Quantity Part Number Suffix 2500/Tape & Reel -13 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. AH293 Rev. 2 1 of 7 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH293 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Pin Assignment Vdd 1 GND 2 DO 3 SOT89-5L AH293 5 RD 7 DOB 4 Pin Descriptions Symbol RD Vdd DO DOB GND Description Rotor-State Detection Input Power Output Pin Output Pin Ground AH293 Rev. 2 2 of 7 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH293 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Block Diagram V dd 2 Lock shutdown and Automatic recovery Regulator 3 Hall Plate DO Amp. Control Logic 4 DOB 5 GND 1 RD Typical Application Circuit D2 V dd (1.8V/5.75V) R pu D1 1 2 3 4 5 293 Coil 2 GND Coil 1 RD (alarm) Notes: R1, R2: typical 56 O C1, C2, C3: typical 2.2 F The R, C value need to be fine tuned based on coils design. C3 R1 C1 R2 C2 1.8V/5.75V DC Brush-Less Fan with RD Output Function AH293 Rev. 2 3 of 7 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH293 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Absolute Maximum Ratings Characteristics Operating Supply Voltage Output Current Power Dissipaton Operating Temperature Storage Temperature Maximum Junction Temperature ( TA = 25C ) Symbol Vdd IO (AVE) IO (PEAK) PD Top Tst Tj Rating 8 400 700 800 -20 ~ 100 -55 ~ 150 150 Unit V mA mW C C C Electrical Characteristics Characteristics Supply Voltage Supply Current Locked Protection On Locked Protection Off Output Saturation Voltage Output On Resistance RD Output Vds Output Zener-Breakdown Voltage *Note: ( TA = 25 C, Vdd = 5V, unless otherwise specified ) Symbol Vdd Idd Tlrp-on Tlrp-off VOUT( sat ) Conditions Operating Operating Min. 1.8* 2.4 - Typ. 2.6 0.4 3 300 600 1.75 0.5 15 Max. 5.75 4.0 3.6 - Unit V mA Sec Sec mV ohm V V IO = 180mA IO = 350mA IO = 10mA Rds(on) Vol Vz 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 - IN+ L H - CT L L H OUT1 H L off OUT2 L H off RD L L off Mode Rotating Rotating Lockup protection activated Latch-type RD output is low during rotation and high during stop AH293 Rev. 2 4 of 7 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH293 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Magnetic Characteristics Characteristics Operation Point Release Point Hysteresis ( TA = 25 C, Vdd = 5V, unless otherwise specified ) ( 1mT = 10 Gauss ) Symbol Bop Brp Bhy Min. --60 -Typ. 30 -30 60 Max. 60 --Unit Gauss Gauss Gauss Operating Characteristics DOB Output Voltage in Volts Output Voltage in Volts DO RP 12 10 8 6 4 OFF OFF 12 10 8 6 4 OP ON 2 OP Vsat RP Vsat 2 ON Brp 0 Bop Magnetic Flux Density in Gauss Brp 0 Bop Magnetic Flux Density in Gauss S Marking side N ( SOT89-5 ) AH293 Rev. 2 5 of 7 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH293 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Performance Characteristics (1) SOT89-5L TA (C) PD (mW) TA (C) PD (mW) P D (m W ) 900 800 700 600 500 400 300 200 100 0 0 25 50 75 100 125 150 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 o w e r D is s ip a tio n C u rve T A (C ) Marking Information (1) SOT89-5L 5 4 7 Y : Year: 0-9 M : M onth: A~L 293 Y M X X : Internal code a~z : Lead Free 1 2 3 AH293 Rev. 2 6 of 7 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH293 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Package Information (1) SOT89-5L (unit:mm ) Sensor Location 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. AH293 Rev. 2 7 of 7 www.diodes.com JANUARY 2007 (c) Diodes Incorporated |
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