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data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 1 general description the am4951/r/2 series is a single-phase btl output fan motor driver designed by bipolar process. this ic features high efficiency, silent operation and includes lock shutdown and automatic restart functions. when the motor is under lock condition, the lock shutdown function turns off the output current. when the lock condition is removed, the ic will restart automatically and allow dc fan to run. it is applied for high reliability and low noise application, such as personal computers, notebook, car audio, cpu cooling systems and power supplies in consumer electronics systems. the am4951/r series is available in msop-8 (12v application only) or psop-8 (24v application only) package. the am4952 is available in msop-10 package. features ? btl output single-phase full-wave linear drive (gain resistor=1k to 360k ? , gain=51db) ? support low-voltage drive and feature a wide usable voltage range (2.2v to 24v) ? low saturation output (high side and low side saturation voltage): v sat_total =1.2v (typical, i out =200ma) ? built-in lock protection and automatic restart circuits ? built-in fg/rd output ? built-in hall sensor bias (am4952 only, v hb =1.5v) ? thermal protection circuit ? small-sized, high thermal capacity package ? fg output (am4951), rd output (am4951r), fg and rd output (am4952) applications ? notebook, personal computers ? power supplies in consumer electronics, car audio and office peripherals ? cpu cooling systems msop-8 psop-8 msop-10 figure 1. package types of am4951/r/2
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 2 pin configuration mm package mp package (msop-8) (psop-8) for am4951/r 12v application for am4951/r 24v application mm package (msop-10) for am4952 figure 2. pin configuratio n of am4951/r/2 (top view)
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 3 functional block diagram control circuit charge discharge out1 out2 in+ in- hb vcc gnd rd fg discharge pulse ct 1.5v reg 1 (1) 2 (3) 3 (4) 4 (5) 5 (6) 6 (7) 7 (8) 8 (9) 8 (10) (2) a (b) a for am4951/r b for am4952 figure 3. functional block diagram of am4951/r/2
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 4 tr: tape & reel blank: tube ordering information am495 - circuit type package temperature range output signal part number marking id packing type msop-8 -40 to 105 c fg am4951mm-g1 4951mm-g1 tube am4951mmtr-g1 4951mm-g1 tape & reel rd am4951rmm-g1 4951rmm-g1 tube am4951rmmtr-g1 4951rmm-g1 tape & reel psop-8 fg am4951mp-g1 4951mp-g1 tube am4951mptr-g1 4951mp-g1 tape & reel rd am4951rmp-g1 4951rmp-g1 tube am4951rmptr-g1 4951rmp-g1 tape & reel msop-10 fg & rd am4952mm-g1 4952mm-g1 tube AM4952MMTR-G1 4952mm-g1 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 mm: msop-8 msop-10 mp: psop-8 1: am4951 1r: am4951r 2: am4952
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 5 absolute maximum ratings (note 1, t a =25oc) parameter symbol value unit supply voltage v cc 28 v peak output current i out 500 ma fg/rd pull-up voltage v fg /v rd 28 v fg/rd output current i fg /i rd 10 ma thermal resistance (junction to ambient) ja msop-8 205 c/w psop-8 110 msop-10 195 thermal resistance (junction to case) jc msop-8 48 c/w psop-8 36 msop-10 46 power dissipation p d msop-8 585 mw psop-8 960 mw msop-10 585 mw operating temperature t op -40 to 125 oc storage temperature t stg -55 to 150 oc 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 op eration 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 2.2 24 v hall input voltage v icm 0 v cc -1.5 v operating ambient temperature t a -40 105 oc
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 6 electrical characteristics v cc =12v, t a =25 o c, unless otherwise specified. parameter symbol conditions min typ max unit supply current i cc1 v ct =l 3 6 9 ma i cc2 v ct =h 2.5 5 7.5 ma ct charge current i chg 0.9 1.3 1.5 a ct discharge current i dhg 0.1 0.15 0.25 a ct charge/discharge current ratio r ct i chg / i dhg 6 8 10 ct clamp voltage v cl 1.3 1.5 1.7 v ct comparator voltage v cp 0.3 0.5 0.7 v out low saturation voltage v sat_l i out =200ma 0.25 0.45 v out high saturation voltage v sat_h i out =200ma 0.95 1.2 v hall input sensitivity v hn 7 15 mv fg low level voltage (for am4951/2) v fg i fg =5ma 0.15 0.3 v fg leakage current (for am4951/2) i fgl v fg =15v 1 30 a rd low level voltage (for am4951r/2) v rd i rd =5ma 0.15 0.3 v rd leakage current (for am4951r/2) i rdl v rd =15v 1 30 a hb voltage (for am4952) v hb i hb =1ma 1.35 1.5 1.65 v
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 7 typical performance characteristics figure 4. supply current vs. supply voltage figure 5. supply current vs. ambient temperature figure 6. saturation voltage vs. output current figure 7. power dissipation vs. ambient temperature -50 -25 0 25 50 75 100 125 0 2 4 6 8 10 12 v cc =12v i cc1 (v ct =l) i cc2 (v ct =h) i cc (ma) t a ( o c) 0 50 100 150 200 250 300 350 400 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 v cc =12v, t a =25 o c v sat_h v sat_l v sat (v) i out (ma) 0 3 6 9 12 15 18 21 24 1 2 3 4 5 6 7 8 9 i cc1 (v ct =l) i cc2 (v ct =h) t a =25 o c i cc (ma) v cc (v) -50 -25 0 25 50 75 100 125 150 0 150 300 450 600 750 900 package: msop-8/msop-10 power dissipation (mw) t a ( o c)
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 8 typical performance characteristics (continued) -50 -25 0 25 50 75 100 125 150 0 150 300 450 600 750 900 1050 1200 package: psop-8 p d (mw) t a ( o c) figure 8. power dissipation vs. ambient temperature
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 9 typical application note 2: adding d1 can protect the ic from destruction by reverse connection. if d1 is used, it is necessary to insert a capacitor c1 to provide a regene rative current route. similarly, if th ere is no nearby capacitor on the fan power supply line, c1 will also be necessary to improve reliability. its cap acity should be larger than 2.2 f. note 3: if the hall sensor bias is taken from v cc , a 1/2 v cc bias, as shown in the figure must be used. adjusting the value of r1 and r2 may achieve better startup characteristics and efficien cy, even quiet operation. note 4: this pin must be left open if unused. note 5: if the line between hall sensor output and hall sensor input of ic is long, the noise may occur in this line. but it can be eliminated by adding a capacitor c3. note 6: each of r2, r3, r4 and r5 (am4951/r only) is recommended to be 51k ? typical. r1 is recommended to be 2k and must be added when v cc is larger than 20v. note 7: the package of ah920 is sot-23-3. if it is packaged in to-92s-3 please exchange in- with in+. figure 9. typical application of am4951/r
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 10 typical application (continued) fg vcc out2 gnd out1 ct in- in+ am4952 hall r1 d1 c1 c2 l rd r2 hb c3 v fg v rd figure 10. typical application of am4952
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 11 mechanical dimensions msop-8 unit: mm(inch)
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 12 mechanical dimensions (continued) psop-8 unit: mm(inch) 3.202(0.126) 3.402(0.134)
data sheet btl drive single-phase full-wave fa n motor driver am4951/r/2 apr. 2012 rev. 1. 4 bcd semiconductor manuf acturing limited 13 mechanical dimensions (continued) msop-10 unit: mm(inch) 0.400(0.016) 0.800(0.031) 3 . 1 0 0 ( 0 . 1 2 2 ) 2 . 9 0 0 ( 0 . 1 1 4 ) 0 . 8 2 0 ( 0 . 0 3 2 ) 1 . 1 0 0 ( 0 . 0 4 3 ) 0 6 0 . 0 9 0 ( 0 . 0 0 4 ) 0 . 2 3 0 ( 0 . 0 0 9 ) 0 . 7 5 0 ( 0 . 0 3 0 ) 0 . 9 5 0 ( 0 . 0 3 7 ) 4 . 7 5 0 ( 0 . 1 8 7 ) 5 . 0 5 0 ( 0 . 1 9 9 ) 0.280(0.011) 0.180(0.007) 0.500(0.020) typ 3.100(0.122) 2.900(0.114) 0 . 0 2 0 ( 0 . 0 0 1 ) 0 . 1 5 0 ( 0 . 0 0 6 ) note: eject hole, oriented hole and mold mark is optional.
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 yishan road, shanghai 200233, china tel: +021-6485-1491, fa x: +86-021-5450-0008 main site regional sales office shenzhen office shanghai sim-bcd semiconductor manu facturing co., ltd., shenzhen office unit a room 1203,skyworth bldg., gaoxin ave.1.s., nanshan district shenzhen 518057, china tel: +86-0755-8660-4900, fax: +86-0755-8660-4958 taiwan office (taipei) bcd semiconductor (taiwan) company limited 3f, no.17, lane 171, sec. 2, jiu-zong rd., ne i-hu dist., taipei(114), taiwan, r.o.c tel: +886-2-2656 2808 fax: +886-2-2656-2806/26562950 taiwan office (hsinchu) bcd semiconductor (taiwan) company limited 8f, no.176, sec. 2, gong-dao 5th road, east district hsinchu city 300, taiwan, r.o.c tel: +886-3-5160181, fax: +886-3-5160181 - headquarters bcd (shanghai) micro-electronics limited no. 1600, zi xing road, shanghai zizhu scie nce-based industrial park, 200241, p. r.c. tel: +86-021-2416-2266, fax: +86-021-2416-2277 usa office bcd semiconductor corp. 48460 kato road, fremont, ca 94538, usa tel: +1-510-668-1950 fax: +1-510-668-1990 korea office bcd semiconductor limited korea office. room 101-1112, digital-empire ii, 486 sin-dong, yeongtong-gu, suwon-city, gyeonggi-do, korea tel: +82-31-695-8430 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 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 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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