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preliminary datasheet two phase dual-coil high voltage smart fan motor driver AH9280 mar. 2010 rev. 1. 0 bcd semiconductor manufacturing limited 1 general description the AH9280 is a most advanced smart fan controller and hall ic driver manufactured by special cmos process. it is designed for 5v, 12v and 24v cooling fan. to allow survival in a harsh environment and lower the total system cost, the AH9280 has been designed with many powerful functions while almost eliminating all discrete components, such as, capacitor, resistor, transistor, diode and pc board. the AH9280 can operate no rmally in an ambient temperature up to 125c due to its hall ic circuitry and power mosfet output that allow low power dissipation. when there is no motion for one second, the ic will automatically detect the locked rotor conditions, and enter protection mode, shutting off the motor driver for five seconds. then, the ic will turn on the motor driver for one second to detect whether there is rotation condition, if fails, the ic will shut off motor driver for five seconds again. this sequence will be repeated until rotation condition is detected, and the ic enters normal operation. this feature can effectively prevent the AH9280 from overheating and damage due to long-time locked rotor condition. specially designed for driving large fans, the AH9280 is optimized for low start-up voltage. the AH9280 is availabl e in to-94 package. features ? high-sensitivity integrated hall sensor ? low start-up voltage ? 5v, 12v and 24v operation ? peak output current up to 1200ma ? power-efficient cmos and power mosfets ? built-in output protection clamping diode ? locked rotor shutdown and auto-restart ? esd rating: 6000v (human body model) 400v (machine model) applications ? 5v/12v/24v dc brushless motor/fan ? pc, server, laptop cooling fan ? power supply cooling fan ? large/small sized fan figure 1. package type of AH9280 to-94
preliminary datasheet two phase dual-coil high voltage smart fan motor driver AH9280 mar. 2010 rev. 1. 0 bcd semiconductor manufacturing limited 2 pin configuration z4 package (to-94) 1 2 3 4 figure 2. pin configuration of AH9280 (front view) pin description pin number pin name function 1 vcc power supply pin 2 do output pin 1 3 dob output pin 2 4 gnd ground pin
preliminary datasheet two phase dual-coil high voltage smart fan motor driver AH9280 mar. 2010 rev. 1. 0 bcd semiconductor manufacturing limited 3 functional block diagram figure 3. functional block diagram of AH9280 ordering information AH9280 - circuit type package z4: to-94 package temperature range part number marking id packing type to-94 -40 to 125 c AH9280z4-g1 9280z4-g1 bulk bcd semiconductor's pb-free products, as designated with "g1" suffix in the part number, are rohs compliant and green. g1: green
preliminary datasheet two phase dual-coil high voltage smart fan motor driver AH9280 mar. 2010 rev. 1. 0 bcd semiconductor manufacturing limited 4 absolute maximum ratings (note 1, t a =25 c ) parameter symbol value unit supply voltage v cc 28 v peak output current i out_p 1200 ma continuous output current i out_c 600 ma supply current (fault) i cc 6 ma power dissipation p d 600 mw thermal resistance (junction to ambient) ja 208 c/w storage temperature t stg -55 to 150 c esd (human body model) esd 6000 v esd (machine model) esd 400 v note 1: stresses greater than those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ?recommended operating co nditions? is not implied. exposure to ?absolute maximum ratings? for extended periods may affect device reliability. recommended operating conditions parameter symbol min max unit supply voltage v cc 2.5 24 (note 2) v ambient temperature t a -40 125 c note 2: it is recommended to add a 680 ? resistor at vcc if the supply voltage is 24v.
preliminary datasheet two phase dual-coil high voltage smart fan motor driver AH9280 mar. 2010 rev. 1. 0 bcd semiconductor manufacturing limited 5 electrical characteristics v cc =12v, t a =25c, unless otherwise specified. parameter symbol conditions min typ max unit supply voltage v cc operating 2.5 12 24 (note 2) v supply current i cc average 4 6 ma output current i out 500 ma output leakage current i leakage 0.1 10 a saturation voltage v sat i out =350ma 600 1000 mv output on time t on 0.8 s output off time t off 5 s output zener break-down voltage v z 35 v magnetic characteristics v cc =12v, t a =25c, unless otherwise specified. parameter symbol min typ max unit operating point b op 20 50 gauss releasing point b rp -50 -20 gauss hysteresis b hys 40 gauss v do (v) high b hys b rp b op v sat 0 ns on-state off-state low turn on turn off figure 4. magnetic flux density (gauss)
preliminary datasheet two phase dual-coil high voltage smart fan motor driver AH9280 mar. 2010 rev. 1. 0 bcd semiconductor manufacturing limited 6 n s marking side test circuit figure 5. basic test circuit of AH9280 -40 -20 0 20 40 0 2 4 6 8 10 12 magnetic flux density b (gauss) v do (v) v cc v sat -40 -20 0 20 40 0 2 4 6 8 10 12 magnetic flux density b(gauss) v dob (v) v cc v sat figure 6. v do vs. magnetic flux density figure 7. v dob vs. magnetic flux density
preliminary datasheet two phase dual-coil high voltage smart fan motor driver AH9280 mar. 2010 rev. 1. 0 bcd semiconductor manufacturing limited 7 4 8 12 16 20 24 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 supply current (ma) supply voltage (v) t a =25 o c -40 -20 0 20 40 60 80 100 120 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 supply current (ma) ambient temperature ( o c) v cc =12v 4 8 12 16 20 24 -75 -50 -25 0 25 50 75 100 b op /b rp /b hys (gauss) supply voltage (v) t a =25 o c b op b rp b hys -40 -20 0 20 40 60 80 100 120 100 200 300 400 500 600 700 800 900 1000 saturation voltage (mv) ambient temperature ( o c) v cc =12v i out =150ma i out =350ma typical performance characteristics figure 8. supply current vs. supply voltage figure 9. supply current vs. ambient temperature figure 10. b op /b rp /b hys vs. supply voltage figure 11. saturation voltage vs. ambient temperature
preliminary datasheet two phase dual-coil high voltage smart fan motor driver AH9280 mar. 2010 rev. 1. 0 bcd semiconductor manufacturing limited 8 0 100 200 300 400 500 600 0 200 400 600 800 1000 1200 saturation voltage (mv) output current (ma) t a =25 o c v cc =12v -25 0 25 50 75 100 125 150 0 100 200 300 400 500 600 power dissipation (mv) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 -50 -40 -30 -20 -10 0 10 20 30 40 50 b op /b rp /b hys (gauss) ambient temperature ( o c) v cc =12v b op b rp b hys typical performance characteristics (continued) figure 12. saturation voltage vs. output current figure 13. power dissipation vs. ambient temperature figure 14. b op /b rp /b hys vs. ambient temperature
preliminary datasheet two phase dual-coil high voltage smart fan motor driver AH9280 mar. 2010 rev. 1. 0 bcd semiconductor manufacturing limited 9 typical application figure 15. typical application of AH9280 (for 5v and 12v brushless dc fan, note 3) figure 16. typical application of AH9280 (for 24v brushless dc fan, note 3) note 3: 1. typical 2.2 f electrolytic capacitors are recommended for c1, c2 and c3. 2. typical 680 ? resistor is recommended for r1. 3. d1 is an ordinary diode used to block the reverse current from coil side. 4. d1, c1, c2, c3 (marked in dash rectangle) can be cancelled according to system requirement.
preliminary datasheet two phase dual-coil high voltage smart fan motor driver AH9280 mar. 2010 rev. 1. 0 bcd semiconductor manufacturing limited 10 mechanical dimensions to-94 unit: mm(inch) package sensor location 3.780(0.149) 4.080(0.161) 0.500(0.020) 0.700(0.028) 1.520(0.059) 1.720(0.067) 0.700(0.028) 0.900(0.035) 0.360(0.014) 0.510(0.020) 4.980(0.196) 5.280(0.208) 0.380(0.015) 0.550(0.022) 0.360(0.014) 0.500(0.020) 14.000(0.550) 15.300(0.602) 1.270(0.050) typ 3.710(0.146) 3.910(0.154) 45 typ 3.450(0.136) 3.750(0.148) 1.100(0.043) 1.400(0.055) 2.000(0.079) 2.300(0.091) (for hall ic)
important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing co., ltd. 800 yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd., shenzhen office unit a room 1203, skyworth bldg., gaoxin ave.1.s., nanshan district, shenzhen, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corp. 30920 huntwood ave. hayward, ca 94544, usa tel : +1-510-324-2988 fax: +1-510-324-2788 - headquarters bcd semiconductor manufacturing limited no. 1600, zi xing road, shanghai zizhu sc ience-based industrial park, 200241, china tel: +86-21-24162266, fax: +86-21-24162277 bcd semiconductor manufacturing limited important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing limited 800, yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 bcd semiconductor manufacturing limited main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd. shenzhen office advanced analog circuits (shanghai) corporation shenzhen office room e, 5f, noble center, no.1006, 3rd fuzhong road, futian district, shenzhen 518026, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corporation 30920 huntwood ave. hayward, ca 94544, u.s.a tel : +1-510-324-2988 fax: +1-510-324-2788 - ic design group advanced analog circuits (shanghai) corporation 8f, zone b, 900, yi shan road, shanghai 200233, china tel: +86-21-6495 9539, fax: +86-21-6485 9673 bcd semiconductor manufacturing limited http://www.bcdsemi.com bcd semiconductor manufacturing limited

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