AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER General Description Features • • • • • • • • 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. 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 • 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 Note: 1. Lead-Free Packing L : Lead-Free -B : Bulk -7/-13 : Taping RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Lead-free Device Package Code Packaging (Note 2) AH285-Y Y SOT89-5 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 © Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Pin Assignment Vdd 1 GND 2 5 FG 285 DO 3 74 DOB SOT89-5L 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 Hall Plate AH285 Rev. 2 3 DO 4 DOB Control Logic Amp. 5 1 GND FG 2 of 8 www.diodes.com JANUARY 2007 © Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Typical Application Circuit D2 Vdd (12V) R pu 285 D1 Coil2 1 2 3 4 Coil1 5 GND FG C3 Notes: R1, R2: typical 56 Ω C1, C2, C3: typical 2.2µ F The R, C value need to be fine tuned base on coils design. R1 R2 C1 C2 12V DC Brush-less Fan with FG output function Absolute Maximum Ratings (TA = 25°C) Characteristics Symbol Supply Voltage Rating 24 500 700 800 -40 ~ 100 -55 ~ 150 150 156 Vdd IO(AVE) IO(PEAK) PD Output Current Power Dissipation Operating Temperature Storage Temperature Maximum Junction Temp. Thermal Resistance Unit Topr Tstg Tj θJA V mA mW °C °C °C °C/W TA TJ Tc θ JA θ JC Note: θ JA should be confirmed with what heat sink thermal resistance. If no heat sink contacting, AH285 Rev. 2 3 of 8 www.diodes.com θ JA is almost the same as θ JC . JANUARY 2007 © Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Electrical Characteristics (TA = 25°C, Vdd =12V, unless otherwise specified) Symbol Conditions Min. Typ. Max. Unit Supply Voltage Vdd 3.8 - 20 V Supply Current Output Leakage Current Locked Protection On Locked Protection Off Idd Ioff Operating Operating VOUT=24V 0.4 2.4 35 2 < 0.1 0.5 3 375 625 1.25 0.5 42 4 10 0.6 3.6 500 900 1.67 60 mA µA Sec Sec Characteristics Tlrp-on Tlrp-off Output Saturation Voltage Output On Resistance FG Output Vds Output Zener-Breakdown Voltage Truth Table INH L - IN+ L H - CT L L H Magnetic Characteristics VOUT( sat ) Rds(on) Vol Vz OUT1 H L off IO=300mA IO=500mA IO=300mA IO=10mA OUT2 L H off FG H L - mV ohm V V Mode Rotating Rotating Lockup protection activated (TA = 25°C, Vdd = 12V, unless otherwise specified) (1mT=10 Gauss) Characteristics Symbol Min. Typ. Max. Unit Operation Point Release Point Hysteresis Bop Brp Bhy 10 -60 - 30 -30 60 60 -10 - Gauss Gauss Gauss AH285 Rev. 2 4 of 8 www.diodes.com JANUARY 2007 © Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Operating Characteristics DO 12 RP Output Voltage in Volts Output Voltage in Volts DOB OFF 10 8 6 4 2 ON OP Vsat Brp 0 12 OFF OP 10 8 6 4 2 RP ON Vsat Bop Brp Magnetic Flux Density in Gauss 0 Bop Magnetic Flux Density in Gauss S Marking side N ( SOT89-5 ) AH285 Rev. 2 5 of 8 www.diodes.com JANUARY 2007 © Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Performance Characteristics P (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 D (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 75 100 125 150 T AH285 Rev. 2 6 of 8 www.diodes.com A (°C ) JANUARY 2007 © Diodes Incorporated AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER Marking Information (1) SOT89-5L 4 7 5 Y : Year 0-9 M : Month A~L 285 Y M X 1 2 X : Internal code a~z : Lead Free 3 Package Information (1) SOT89-5L Sensor Location AH285 Rev. 2 7 of 8 www.diodes.com JANUARY 2007 © 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 © Diodes Incorporated