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data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 1 general description the AH9281/82 is a one-chip solution for driving two-coil brushless dc motors and fans. based on the advanced cdmos process, the ic contains a hall-effect sensor, dynamic offset correction and powerful output drivers with 1200ma peak output current capability. specially designed for driving large fans, the device is optimized for low start-up voltage. frequency generator or rotation detection is available. the open drain output makes easier the connectivity with any external interface such as hardware monitoring or super i/o ic. the AH9281/82 is available in to-95 and sot-89-5 packages. features ? high sensitivity integrated hall sensor ? low start-up voltage ? 5v and 12v 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 ? integrated tachometer (AH9281) or alarm (ah9282) signal output ? esd rating: 6000v (human body model) 400v (machine model) applications ? 5v/12v dc brushless motor/fan ? p c , s e r v e r, l a p t o p c o o l i n g f a n ? power supply cooling fan ? large or small fans to-95 sot-89-5 figure 1. package types of AH9281/82
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 2 1 2 3 4 5 gnd dob do fg/rd vcc gnd dob do fg/rd vcc 123 4 5 pin configuration z5 package r package (to-95) (sot-89-5) (front view) (top view) figure 2. pin configur ation of AH9281/82 pin description pin number to-95 sot-89-5 pin name function 1 1 vcc power supply pin 2 3 fg/rd frequency generator (rotati on detection) open drain output 3 4 do output pin 1 4 5 dob output pin 2 5 2 gnd ground pin
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 3 functional block diagram a (b) a for to-95 b for sot-89-5 figure 3. functional block diagram of AH9281/82
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 4 tr: tape & reel blank: bulk ordering information ah928 - circuit type package temperature range output signal part number marking id packing type fg AH9281z5-g1 9281z5-g1 bulk to-95 rd ah9282z5-g1 9282z5-g1 bulk fg AH9281rtr-g1 g41c tape & reel sot-89-5 -40 to 125 c rd ah9282rtr-g1 g41d tape & reel bcd semiconductor's pb-free products, as designated with "g1" suffix in the part number, are rohs compliant and green. g1: green package z5: to-95 r: sot-89-5 1: AH9281 2: ah9282
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 5 absolute maximum ratings (note 1, t a =25oc) parameter symbol value unit supply voltage v cc 18 v supply current (fault) i cc 6 ma peak output current i out_p 1200 ma continuous output current i out_c 600 ma fg/rd pull-up voltage v fg /v rd 28 v to-95 600 power dissipation p d sot-89-5 800 mv to-95 208 thermal resistance (junction to ambient) ja sot-89-5 156 oc/w storage temperature t stg -55 to 150 oc 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 16 v operating ambient temperature t a -40 125 oc
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 6 electrical characteristics v cc =12v, t a =25 o c, unless otherwise specified. parameter symbol conditions min typ max unit supply voltage v cc operating 2.5 12 16 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 fg/rd output low voltage v fgl /v rdl i fg =5ma 0.1 0.2 v fg/rd output leakage current i fglk /i rdlk v fg /v rd =12v 0.1 10 a fg/rd output current limit i fglim / i rdlim v fg /v rd =12v 30 ma output zener break-down voltage v z 35 v magnetic characteristics v cc =12v, t a =25 o c, unless otherwise specified. parameter symbol min typ max unit operating point b op 0 20 50 gauss releasing point b rp -50 -20 0 gauss hysteresis b hys 40 gauss
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 7 test circuit figure 4. basic test circuit of AH9281/82 figure 5. v do vs. magnetic flux density figure 6. v dob vs. magnetic flux density n s marking side -40 -20 0 20 40 0 2 4 6 8 10 12 magnetic flux density b (gs) v do (v) v cc v sat -40 -20 0 20 40 0 2 4 6 8 10 12 magnetic flux density b (gs) v dob (v) v cc v sat
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 8 2 4 6 8 10 12 14 16 18 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 20406080100120 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) t a =25 o c v cc =12v 4 6 8 10 12 14 16 18 -75 -50 -25 0 25 50 75 100 t a =25 o c b op /b rp /b hys (gauss) supply voltage (v) b op b rp b hys -40-20 0 20406080100120 -50 -40 -30 -20 -10 0 10 20 30 40 50 b op b rp b hys b op /b rp /b hys (gauss) ambient temperature ( o c) v cc =12v typical performance characteristics figure 7. supply current vs. supply voltage figure 8. supply current vs. ambient temperature figure 9. b op /b rp /b hys vs. supply voltage figure 10. b op /b rp /b hys vs. ambient temperature
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 9 -40 -20 0 20 40 60 80 100 120 100 200 300 400 500 600 700 800 900 1000 v cc =12v saturation voltage (mv) ambient temperature ( o c) i out =150ma i out =350ma 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 (mw) ambient temperature ( o c) package: to-95 -25 0 25 50 75 100 125 150 0 200 400 600 800 power dissipation (mw) ambient temperature ( o c) package: sot-89-5 typical performance characteristics (continued) figure 11. saturation voltage vs. ambient temperature figure 12. saturation voltage vs. output current figure 13. power dissipation vs. ambient temperature figure 14. power dissipation vs. ambient temperature
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 10 typical application AH9281/2 vcc do dob gnd v cc =5v or 12v fg/rd c1 2.2 f r pu 4.7k fg/rd c2 2.2 f c3 2.2 f d1 coil 1 coil 2 r1 47 r2 4.7 r3 4.7 figure 15. typical application 1 of AH9281/82 (to-95, note 2) note 2: 1. d1 is an ordinary diode used to filter the noise from vcc and protect ic if vcc and gnd are plugged reversed. 2. r1=47 ? typical. 3. c1=c2=c3=2.2 f typical, electrolytic capacitors are better. th ey should be fine tuned based on system design. 4. r2=r3=4.7 ? typical. they can be cancelled according to system requirement. 5. r pu =4.7k ? typical.
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 11 typical application (continued) figure 16. typical application 2 of AH9281/82 (to-95, note 3) note 3: 1. d1 is an ordinary diode used to filter the noise from vcc and protect ic if vcc and gnd are plugged reversed. 2. r1=47 ? typical. 3. c1 =2.2 f typical, electrolytic capacitors are better. they should be fine tuned based on system design. 4. zd1 and zd2 breakdown voltage are 35v. 5. r pu =4.7k ? typical.
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 12 typical application (continued) figure 17. typical application 3 of AH9281/82 (sot-89-5, note 4) note 4: 1. d1 is an ordinary diode used to filter the noise from vcc and protect ic if vcc and gnd are plugged reversed. 2. r1=47 ? typical. 3. c1=c2=c3=2.2 f typical, electrolytic capacitors are better. th ey should be fine tuned based on system design. 4. r2=r3=4.7 ? typical. they can be cancelled according to system requirement. 5. r pu =4.7k ? typical.
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 13 typical application (continued) 5 2 3 1 4 vcc gnd fg/rd do dob v cc =5v or 12v r pu 4.7k AH9281/2 gnd coil 1 coil 2 c1 2.2 f fg/rd d1 r1 47 zd1 35v zd2 35v figure 18. typical application 4 of AH9281/82 (sot-89-5, note 5) note 5: 1. d1 is an ordinary diode used to filter the noise from vcc and protect ic if vcc and gnd are plugged reversed. 2. r1=47 ? typical. 3. c1=2.2 f typical, electrolytic capacitors are better. they should be fine tuned based on system design. 4. zd1 and zd2 breakdown voltage are 35v. 5. r pu =4.7k ? typical. .
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 14 mechanical dimensions to-95 unit: mm(inch) 1.295(0.051) 1.803(0.071) 0.610(0.024) min 0.360(0.014) 0.510(0.020) 5.105(0.201) 5.359(0.211) 0.330(0.013) 0.432(0.017) 0.950(0.037) ref 14.000(0.551) 16.000(0.630) 0.381(0.015) 0.581(0.023) 3.531(0.139) 3.785(0.149) 1.220(0.048) 1.620(0.064) 1.150(0.045) 1.350(0.053) 2.250(0.089) 2.450(0.096) package sensor location (for hall ic)
data sheet two phase dual-coil high voltage smart fan motor driver with fg/rd AH9281/82 oct. 2011 rev. 1. 4 bcd semiconductor manufacturing limited 15 mechanical dimensions (continued) sot-89-5 unit: mm(inch)
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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