AH292

AH292 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Features • • • • • • • • • On Chip Hall Sensor Rotor-Locked Shutdown Automatically Restart Frequency Generator (FG) 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) Lead Free Packages: SOT89-5L General Description AH292 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. In addition a Frequency generator (FG) output is also available 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 AH292 - X X X Package Y: SOT89-5L Lead-Free L : Lead Free Packing -B : -7/-13 : Bulk 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 Package Code Y Packaging (Note 2) SOT89-5L AH292-Y Tube/Bulk Part Number Quantity Suffix NA NA 7” Tape and Reel Quantity 2500/Tape & Reel Part Number Suffix -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. AH292 Rev. 3 1 of 7 www.diodes.com JANUARY 2007 © Diodes Incorporated AH292 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Pin Assignment Vdd 1 GND 2 DO 3 SOT89-5L AH292 5 FG 7 DOB 4 Pin Descriptions Symbol FG Vdd DO DOB GND Description Frequency Generation Input Power Output Pin Output Pin Ground Block Diagram Vdd 2 Lock shutdown and Automatic recovery Regulator 3 Hall Plate DO Amp. Control Logic 4 DOB 5 GND 1 FG AH292 Rev. 3 2 of 7 www.diodes.com JANUARY 2007 © Diodes Incorporated AH292 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Typical Application Circuit D2 Vdd (1.8V/5.75V) R pu D1 1 2 3 4 5 2 92 Coil 2 GND Coil 1 FG C3 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. R1 C1 R2 C2 1.8V/5.75V DC Brush-less Fan with FG output function Absolute Maximum Ratings Characteristics Operating Supply Voltage Output Current Power Dissipation Operating Temperature Storage Temperature Maximum Junction Temperature ( TA = 25°C ) Symbol Vdd IO(AVE) IO(PEAK) PD Topr Tstg Tj Rating 8 400 700 800 -20 ~ 100 -55 ~ 150 150 Unit V mA mW °C °C °C AH292 Rev. 3 3 of 7 www.diodes.com JANUARY 2007 © Diodes Incorporated AH292 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER ( TA = 25 °C, Vdd = 5V, unless otherwise specified ) Electrical Characteristics Characteristics Supply Voltage Supply current Locked Protection On Locked Protection Off Output saturation voltage Output On Resistance FG output Vds Output Zener-breakdown Voltage *Note: Symbol Vdd Idd Tlrp-on Tlrp-off 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 VOUT ( SAT ) Rds(on) Vol Vz IO = 180mA IO = 350mA IO = 10mA 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 FG H L - Mode Rotating Rotating Lockup protection activated 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 AH292 Rev. 3 4 of 7 www.diodes.com JANUARY 2007 © Diodes Incorporated AH292 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Operating Characteristics DOB Output Voltage in Volts DO RP 12 10 8 6 4 Output Voltage in Volts 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 ( SOT25 ) AH292 Rev. 3 5 of 7 www.diodes.com JANUARY 2007 © Diodes Incorporated AH292 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Performance Characteristics (1) SOT89-5L TA (°C) PD (mW) TA (°C) PD (mW) PD (mW) 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 Power Dissipation Curve TA (°C) Marking Information (1) SOT89-5L 5 4 7 Y : Year: 0-9 M : Month: A~L 292 Y M X X : Internal code a~z : Lead Free 1 2 3 AH292 Rev. 3 6 of 7 www.diodes.com JANUARY 2007 © Diodes Incorporated AH292 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Package Information (1) Package type: 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. AH292 Rev. 3 7 of 7 www.diodes.com JANUARY 2007 © Diodes Incorporated