AH280A-SAB

AH280 Hall-Effect Smart Fan Driver Features - On chip Hall plate - Built-in Zener diode protection for output driver - Built-in protection diode for power reverse connecting - Rotor-lock detection - Automatically restart after release of motor locking - Adjustable auto restart time - Operating voltage: 3.5~20 V - Max Output current: IO(AVE) = 500mA - Packages: SIP-5L, SOP-8L, SOP-8L EP - Less external component General Description AH280 is the integrated Hall sensor owned two complementary outputs for motor’s coil driving, auto locked shutdown and auto restart functions. Functional block diagram includes that a regulator with temperature-compensated band-gap, an on-chip Hall voltage generator, a comparator, a Schmitt trigger and two current output drivers. The regulator can provide wide operational voltage range. The Hall voltage generator is to amplify the Hall voltage due to Hall effect. A Schmitt trigger is to provide switching Hysteresis for noise rejection. To avoid coil burning, rotor-lock detection circuit will shutdown the output driver if detect rotor-lock status. A rotation recovery circuit is to restart the motor after rotor-lock is removed. In addition, the auto re-start time is flexible by adjusting the capacitance (CT). Pin Assignments Front View ( Branded side) Pin Descriptions SIP-5L Symbol P/I/O Pin # CT VCC DO DOB GND I P O O P 1 2 3 4 5 Description Timing cap. Positive power supply Driver output Driver inverted output Ground 12345 SIP-5L ( Top view ) VCC DO DOB NC 1 2 3 4 8 7 6 5 SOP-8L / SOP-8L EP CT NC NC GND SOP-8L/SOP-8L EP Symbol VCC DO DOB NC CT GND Pin # 1 2 3 4,6,7 8 5 Description Positive power supply Driver output Driver inverted output Not connected for SOP8 Timing cap. Ground This datasheet contains new product information. Analog Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev. 0.7 Apr 16, 2004 1/7 AH280 Hall-Effect Smart Fan Driver Block Diagram Vcc 2 Regulator 3 Hall sensor DO Amp Control Logic 4 DOB Lock Shutdown Auto restart circuits 1 5 Gnd CT Ordering Information AH280 X - X X X - X Wafer Body Blank or A~Z : if necessary to specify Package P: SIP-5L S: SOP-8L SP: SOP-8L EP Lead L : Lead Free Blank: Normal Packing Blank : Tube or Bulk A : Tape & Reel Magnetic Characteristics A or B Application Circuit 10µF D ( Top view ) AH280 Coil1 Coil2 C1 Power input CT ( DC Brush-less Fan ) Anachip Corp. www.anachip.com.tw 2/7 Rev. 0.7 Apr 16, 2004 AH280 Hall-Effect Smart Fan Driver Absolute Maximum Ratings Characteristics Operating Supply Voltage Output Current Power Dissipation Operating Temperature Storage Temperature DO(DOB) Vceo D.C. Voltage PD (TA = 25°C) Symbol VCC IO (AVE) IO (PEAK) SIP-5L / SOP-8L SOP-8L EP TOPR TSTG Vceo Rating 20 500 800 550 1000 -20~85 -55~150 40 Unit V mA mW °C °C Vdc Electrical Characteristics Characteristics Internal Zener-protected Voltage Quiescent current (TA=25°C, VCC=12V, CT=1µF) Symbol VZ IQ Output saturation voltage Charge current Discharge current Limiting voltage On time Duty ratio DO DOB ICHG IDHG VCL VCP TON DR Automatic self-rotation recovery circuit Test Conditions VCC=5V Output1 “ON” VCC=12V Output1 “ON” IO=0.2A, TJ=25°C IO=0.4A, TJ=25°C IO=0.5A, TJ=25°C Clamp Voltage Comparator Voltage CT=.47µF TOFF / TON Min, Typ. 46 10 10 3 15 17 0.4 0.6 0.7 2.4 0.5 2.0 1.0 250 5 Max. 20 Unit V mA 20 7 V µA µA V ms - Magnetic Characteristics (1mT = 10 Gauss) A grade Characteristics Operate Point Release Point Hysteresis B grade Characteristics Operate Point Release Point Hysteresis Symbol BOP BRP BHYS Symbol BOP BRP BHYS TA= -20°C to Min. Typ. 10 -60 100 TA= -20°C to Min. Typ. 10 -80 100 +85°C Max. 60 -10 +85°C Max. 80 -10 Unit G G G Unit G G G Anachip Corp. www.anachip.com.tw 3/7 Rev. 0.7 Apr 16, 2004 AH280 Hall-Effect Smart Fan Driver Rotation detection The automatic restart circuit detects a motor lock condition and automatically turns off the output current. When the lock condition is cleared, the IC automatically restarts and allows the motor to run. In the AH280, automatic restart is performed in the following manner. A motor lock condition is detected when the Hall signal stops switching. The output is ON when CT pin is being charged, and OFF when CT pin is being discharged. Hall input ON Motor output OFF CT clamp voltage CT comparator voltage Motor locked Motor locked detected Ton* Toff* CT Motor locked cleared Reverts to normal operation Output ON time (Ton) and OFF time (Toff) Determined by the CT pin capacitor Where C × (VCL − V ) CP (sec) I CHG C × (VCL − VCP ) (sec) Toff= I DHG C is the capacitance of the CT pin external capacitor VCL is the CT pin clamp voltage VCP is the CT pin comparator voltage ICHG is the CT pin charge current IDHG is the CT pin discharge current Ton= Anachip Corp. www.anachip.com.tw 4/7 Rev. 0.7 Apr 16, 2004 AH280 Hall-Effect Smart Fan Driver Performance Characteristics (SIP-5L / SOP-8L) Ta (°C) 25 50 60 70 80 85 90 95 100 138 105 110 110 83 115 55 120 28 Pd (mW) 550 413 358 303 248 220 193 165 Pd (m W ) 600 500 400 300 200 100 0 0 25 50 75 85 P ower D issipation Curve 100 125 150 T a (。 C ) Performance Characteristics (SOP-8L EP) Ta (°C) 25 50 60 70 80 85 90 95 100 400 105 360 110 320 115 280 120 240 Pd (mW) 1000 800 720 640 560 520 480 440 P d (m W ) 1000 900 800 700 600 500 400 300 200 100 0 25 50 75 85 P o w e r D is s ip a t io n C u r v e 100 125 150 T a (。 C ) Marking Information (1) SIP-5L ( Front View ) Part Number (2) SOP-8L / SOP-8L EP ( Front View ) Blank: normal L: Lead Free Package ID Code Nth week: 01~52 Year: "1" = 2001 "2" = 2002 Part Number 280 X XX X X AH280 X XX X X Blank : normal L : Lead Free Package ID Code Nth week: 01~52 Year: "1" = 2001 "2" = 2002 Anachip Corp. www.anachip.com.tw 5/7 Rev. 0.7 Apr 16, 2004 AH280 Hall-Effect Smart Fan Driver Package Information (1) Package Type: SIP-5L unit: mm / [inch] 5.22 ± 0.1 [0.206 ± 0.003] 2° ~ 3° 2-0.3C [0.079-0.012C] 2 ° ~ 5° 1.55 ± 0.1 [0.061 ± 0.003] 4.2 REF [0.165 REF] 0.73 ± 0.1 [0.029 ± 0.003] 2° ~ 5 ° 2° ~ 3 ° 3.65 ± 0.1 [0.144 ± 0.003] 0.48 ± 0.1 [0.019 ± 0.003] 14.3 ± 0.3 [0.563 ± 0.012] 0.38 ± 0.03 [0.015 ± 0.001] 0.95 ± 0.03 [0.037 ± 0.001] 0.38 ± 0.03 [0.015 ± 0.001] Location of sensing point 2.006 mm [0.079 inch] ( Top View) 1.016 mm [0.04 inch] 1 2 3 4 5 Anachip Corp. www.anachip.com.tw 6/7 Rev. 0.7 Apr 16, 2004 AH280 Hall-Effect Smart Fan Driver (2) Package Type: SOP-8L ( Normal / Expose Pad ) X Expose Pad H Y E L VIEW "A" D 7 (4X) A2 A 0.015x45 7 (4X) A1 e B y C VIEW "A" Dimensions In Millimeters Min. Nom. Max. A 1.40 1.60 1.75 A1 0.10 0.25 A2 1.30 1.45 1.50 B 0.33 0.41 0.51 C 0.19 0.20 0.25 D 4.80 5.05 5.30 E 3.70 3.90 4.10 e 1.27 H 5.79 5.99 6.20 L 0.38 0.71 1.27 y 0.10 0° 8° θ (Expose pad) X 2.92 Y 2.34 Symbol Dimensions In Inches Min. Nom. Max. 0.055 0.063 0.069 0.040 0.100 0.051 0.057 0.059 0.013 0.016 0.020 0.0075 0.008 0.010 0.189 0.199 0.209 0.146 0.154 0.161 0.050 0.228 0.236 0.244 0.015 0.028 0.050 0.004 0° 8° 0.115 0.092 - Sensor location 1.860 mm 2.132 mm Anachip Corp. www.anachip.com.tw 7/7 Rev. 0.7 Apr 16, 2004