AH280 Hall-Effect Smart Fan Driver Features General Description - 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 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 Pin Descriptions Front View SIP-5L Symbol P/I/O Pin # ( Branded side) 1 2 3 4 5 SIP-5L Description CT I 1 Timing cap. VCC P 2 Positive power supply DO O 3 Driver output DOB O 4 Driver inverted output GND P 5 Ground SOP-8L/SOP-8L EP ( Top view ) VCC 1 8 CT DO 2 7 NC DOB 3 6 NC NC 4 5 GND Symbol Pin # Description VCC 1 Positive power supply DO 2 Driver output DOB 3 Driver inverted output NC 4,6,7 CT 8 Timing cap. GND 5 Ground Not connected for SOP8 SOP-8L / SOP-8L EP 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 Hall sensor Control Logic Amp Lock Shutdown Auto restart circuits 3 DO 4 DOB 5 Gnd 1 CT Ordering Information AH280 X - X X X - X Wafer Body Package Lead Packing Blank or A~Z : if necessary to specify P: SIP-5L S: SOP-8L SP: SOP-8L EP L : Lead Free Blank: Normal Blank : Tube or Bulk A : Tape & Reel Magnetic Characteristics A or B Application Circuit 10µF C1 ( Top view ) D Coil1 AH280 Coil2 Power input CT ( DC Brush-less Fan ) Anachip Corp. www.anachip.com.tw Rev. 0.7 Apr 16, 2004 2/7 AH280 Hall-Effect Smart Fan Driver Absolute Maximum Ratings (TA = 25°C) Characteristics Operating Supply Voltage Output Current Power Dissipation PD Operating Temperature Storage Temperature DO(DOB) Vceo D.C. Voltage Electrical Characteristics Characteristics Internal Zener-protected Voltage Output saturation voltage Charge current Discharge current Automatic self-rotation recovery circuit Limiting voltage On time Duty ratio Rating 20 500 800 550 1000 -20~85 -55~150 40 Unit V mA mW °C °C Vdc (TA=25°C, VCC=12V, CT=1µF) Symbol VZ Quiescent current Symbol VCC IO (AVE) IO (PEAK) SIP-5L / SOP-8L SOP-8L EP TOPR TSTG Vceo IQ DO DOB ICHG IDHG VCL VCP TON DR 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 Max. - 10 15 20 10 17 20 3 0.4 0.6 0.7 2.4 0.5 2.0 1.0 250 5 7 Unit V mA 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 Anachip Corp. www.anachip.com.tw TA= -20°C to Min. Typ. 10 -60 100 +85°C Max. 60 -10 - TA= -20°C to Min. Typ. 10 -80 100 +85°C Max. 80 -10 - Unit G G G Unit G G G Rev. 0.7 Apr 16, 2004 3/7 AH280 Hall-Effect Smart Fan Driver Rotation detection 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. 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 Hall input ON OFF CT clamp voltage Motor output CT comparator voltage CT Motor locked Motor locked detected Ton* Toff* Motor locked cleared Reverts to normal operation 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 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 Ton= Anachip Corp. www.anachip.com.tw Rev. 0.7 Apr 16, 2004 4/7 AH280 Hall-Effect Smart Fan Driver Performance Characteristics (SIP-5L / SOP-8L) Ta (°C) 25 50 60 70 80 85 90 95 100 105 110 115 120 Pd (mW) 550 413 358 303 248 220 193 165 138 110 83 55 28 Power D issipation Curve Pd (m W ) 600 500 400 300 200 100 0 0 25 50 75 85 100 125 150 T a (。 C ) Performance Characteristics (SOP-8L EP) Ta (°C) 25 50 60 70 80 85 90 95 100 105 110 115 120 Pd (mW) 1000 800 720 640 560 520 480 440 400 360 320 280 240 P o w e r D is s ip a t io n C u r v e P d (m W ) 1000 900 800 700 600 500 400 300 200 100 0 25 50 75 85 100 125 150 T a (。 C ) Marking Information (1) SIP-5L (2) SOP-8L / SOP-8L EP ( Front View ) Part Number 280 X XX X X ( Front View ) Blank: normal L: Lead Free Package Part Number AH280 X XX X X ID Code Nth week: 01~52 Year: "1" = 2001 "2" = 2002 Blank : normal L : Lead Free Package ID Code Nth week: 01~52 Year: "1" = 2001 "2" = 2002 Anachip Corp. www.anachip.com.tw Rev. 0.7 Apr 16, 2004 5/7 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° ~ 3 ° 2° ~ 5 ° 3.65 ± 0.1 [0.144 ± 0.003] 0.48 ± 0.1 [0.019 ± 0.003] 14.3 ± 0.3 0.38 ± 0.03 [0.563 ± 0.012] [0.015 ± 0.001] 0.95 ± 0.03 0.38 ± 0.03 [0.037 ± 0.001] [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 Anachip Corp. www.anachip.com.tw 4 5 Rev. 0.7 Apr 16, 2004 6/7 AH280 Hall-Effect Smart Fan Driver (2) Package Type: SOP-8L ( Normal / Expose Pad ) H E Expose Pad Y X L VIEW "A" D 0.015x45 C B A1 e 7 (4X) A A2 7 (4X) VIEW "A" y 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 Rev. 0.7 Apr 16, 2004 7/7