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| AH285 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: 3.8V~20V Output Current: IO(AVE) = 500mA for SOT89-5 Lead Free Finish/RoHS Compliant for Lead Free products (Note 1) Package: SOT89-5L General Description AH285 is a monolithic fan motor controller with Hall sensor's capability. It contains two complementary open-drain transistors as motor coil drivers, automatic lock current shutdown, and recovery protections. Additional, frequency generator (FG) output is for speed detection 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 AH285 - X X X Package Y : SOT89-5L Lead-Free L : Lead-Free Packing -B : Bulk -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 AH285-Y Package Code Y Packaging (Note 2) SOT89-5 Lead-free Tube/Bulk Quantity Part Number Suffix NA NA 7" Tape and Reel Quantity Part Number Suffix 2500/Tape & Reel -7 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. AH285 Rev. 2 1 of 8 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Pin Assignment Vdd 1 GND 2 DO 3 SOT89-5L 285 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 AH285 Rev. 2 2 of 8 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Typical Application Circuit D2 Vdd (12V) Rpu D1 1 2 285 Coil2 3 4 5 Coil1 FG C3 GND R1 Notes: R1, R2: typical 56 C1, C2, C3: typical 2.2 F The R, C value need to be fine tuned base on coils design. R2 C2 C1 12V DC Brush-less Fan with FG output function Absolute Maximum Ratings Characteristics Supply Voltage Output Current Power Dissipation Operating Temperature Storage Temperature Maximum Junction Temp. Thermal Resistance (TA = 25C) Symbol Vdd IO(AVE) IO(PEAK) PD Topr Tstg Tj Rating 24 500 700 800 -40 ~ 100 -55 ~ 150 150 156 Tc Unit V mA mW C C C C/W JA TA TJ JA JC Note: JA should be confirmed with what heat sink thermal resistance. If no heat sink contacting, JA is almost the same as JC . AH285 Rev. 2 3 of 8 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Electrical Characteristics Characteristics Supply Voltage Supply Current Output Leakage Current Locked Protection On Locked Protection Off Output Saturation Voltage Output On Resistance FG Output Vds Output Zener-Breakdown Voltage Truth Table INH L - (TA = 25C, Vdd =12V, unless otherwise specified) Symbol Vdd Idd Ioff Tlrp-on Tlrp-off VOUT( sat ) Conditions Operating Operating VOUT=24V Min. 3.8 0.4 2.4 35 Typ. 2 < 0.1 0.5 3 375 625 1.25 0.5 42 Max. 20 4 10 0.6 3.6 500 900 1.67 60 Unit V mA A Sec Sec mV ohm V V Rds(on) Vol Vz IO=300mA IO=500mA IO=300mA IO=10mA 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 (TA = 25C, Vdd = 12V, unless otherwise specified) (1mT=10 Gauss) Characteristics Operation Point Release Point Hysteresis Symbol Bop Brp Bhy Min. 10 -60 Typ. 30 -30 60 Max. 60 -10 Unit Gauss Gauss Gauss AH285 Rev. 2 4 of 8 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Operating Characteristics DOB DO Output Voltage in Volts RP OFF Output Voltage in Volts 12 10 8 6 4 2 OFF 12 10 8 6 4 2 OP ON OP Vsat RP ON Vsat Brp 0 Bop Brp 0 Bop Magnetic Flux Density in Gauss Magnetic Flux Density in Gauss S Marking side N ( SOT89-5 ) AH285 Rev. 2 5 of 8 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Performance Characteristics TA (C) PD (mW) TA (C) PD (mW) P D (SOT89-5L) 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 (m W ) P o w e r D is s ip a tio n C u r v e 900 800 700 600 500 400 300 200 100 0 0 25 50 75 100 125 T A 150 (C ) AH285 Rev. 2 6 of 8 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Marking Information (1) SOT89-5L 5 4 7 Y : Year 0-9 M : Month A~L 285 Y M X X : Internal code a~z : Lead Free 1 2 3 Package Information (1) SOT89-5L Sensor Location AH285 Rev. 2 7 of 8 www.diodes.com JANUARY 2007 (c) Diodes Incorporated AH285 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. AH285 Rev. 2 8 of 8 www.diodes.com JANUARY 2007 (c) Diodes Incorporated |
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