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adjustable-speed single-phase full- wave pre-driver for motor am4967 data sheet 1 oct. 2008 rev. 1. 2 bcd semiconductor manufacturing limited general description the am4967 is a single-coil, single-phase motor pre- driver designed by bipolar process. its rotation speed can be controlled through an external pwm. this ic requires few external comp onents and has the merit of high efficiency which make it suitable for use in great air volume, large current and high voltage applications. the am4967 is availabl e in ssop-16 package. features single-phase full-wave pre-drive rotation speed control via external pwm maximum operating current limit linear start function for reducing large current impulse at the moment of turn-on minimum rotation speed setting lock protection and auto start function rotation speed indication over temperature protection application cpu and oa (office automation) cooler fan brushless dc motor figure 1. package type of am4967 ssop-16
adjustable-speed single-phase full- wave pre-driver for motor am4967 data sheet 2 oct. 2008 rev. 1. 2 bcd semiconductor manufacturing limited gs package (ssop-16) pin configuration out2 vcc out2b cs vmin vpwm cosc fg/rd out1 out1b gnd vref ls ct hin+ hin- figure 2. pin config uration of am4967 2 3 4 5 6 7 8 15 14 13 12 11 10 9 16 1
3 bcd semiconductor manufacturing limited adjustable-speed single-phase full- wave pre-driver for motor am4967 oct. 2008 rev. 1. 2 data sheet pin number pin name function 1 out2 second channel p-type driver output. op en-drain output, must be connected with pull-up resistor to drive external power devices in operation 2 out2b second channel n-type driver output. push-pull output to drive external power devices 3 vcc power supply 4cs current limiter indicator. fixed to 0. 2v internally. maximum allowable cur- rent is decided by external sample resistance. when the voltage of this pin exceeds 0.2v, the output will be shut dow n by current limit. if this function is not used, connect this pin to ground directly 5vmin minimum speed setting terminal. connect it to vref when disused. in case it is tied to other power supply for control ling, an isolated re sistor is necessary 6vpwm speed control terminal. it is full spee d mode when connected to ground. if the speed is controlled by pwm mode, th e frequency of control signal is 20khz to 100khz. moreover, a low pass networ k is necessary to transfer pwm to dc level 7cosc pwm basic oscillation frequency genera tor when connected with a capacitor of 220pf. 30khz frequency is available. 8fg/rd "fg" means pin 8 is an output pin of fg signal which is used for detecting rotation speed. "rd" means pin 8 is an output pin of rd signal, and is used for detecting fan rotate-st op state. "fg" and "rd" can be selected according to the requirement. this pin need to be connected with pull-up resistor when used. a new pulse will be generated once input signal changed. keep this pin open when it is not to be used 9hin- hall sensor negative input . to prevent noise, this pin is recommended to be placed as close as possible to hall circuit. if necessary, a capacitor may be added between hin+ and hin- to re duce the influence caused by noise 10 hin+ hall sensor positiv e input. to avoid noise, this pin is recommended to be placed as close as possible to hall circuit 11 ct lock protection and auto start frequency generator. it is connected with an external 0.47 f capacitor which decides lock-rotate time and start time. if lock-rotate protection func tion is disused, please connect this pin to gnd 12 ls linear start terminal. this pin is connected to vref externally via a capacitor of 0.47 f to 1 f which enables fan start steadily. start time is dependent to the capacitance. if linear start function is not used, connect this pin to ground 13 vref 5v voltage reference 14 gnd ground for circuit control 15 out1b first channel n-type driver output. push-pull output to drive external power devices 16 out1 first channel p-type driver output. op en-drain output, must be connected with pull-up resistor to drive extern al power devices in operation pin description
adjustable-speed single-phase full- wave pre-driver for motor am4967 data sheet 4 oct. 2008 rev. 1. 2 bcd semiconductor manufacturing limited functional block diagram figure 3. functional block diagram of am4967 5v reference controller vcc vref hin+ hin- 1 lock shutdown and auto restart oscillation hysteresis amp thermal shutdown ct ls vmin vpwm cosc cs gnd out2 out2b out1 out1b fg/rd 2 3 4 5 67 8 9 10 11 12 13 14 15 16 hysteresis amp pre- driver
5 bcd semiconductor manufacturing limited adjustable-speed single-phase full- wave pre-driver for motor am4967 oct. 2008 rev. 1. 2 data sheet vpwm, vmin cosc hin- hin+ out1 out1b out2 out2b mode lh h l l l off h out1 out2 (driver) l h off h l l out2 out1 (driver) hl hloffloffh regenerative lhoffhoffl hin- hin+ ct out1 out1b out2 out2b fg/rd mode hl l l l off h l out1 out2 (driver) l h off h l l off out2 out1 (driver) hl h off l off h l lock protection l h off h off l off truth table package temperature range part number marking id packing type lead free green lead free green ssop-16 -30 to 105 o c am4967gs-e1 am4967gs-g1 am4967gs am4967gs-g1 tube am4967gstr-e1 AM4967GSTR-G1 am 4967gs am4967gs-g1 tape & reel am4967rgs-e1 am4967rgs-g1 a m4967rgs am4967rgs-g1 tube am4967rgstr-e1 am4967rgstr-g1 am4967rgs am4967rgs-g1 tape & reel circuit type package gs: ssop-16 e1: lead free am4967 - tr: tape and reel blank: tube ordering information 1. driver-lock. v osc is high, v pwm , v vmin and v ls are low. r: rd blank: fg pin 8 2. speed control. v ct , v ls are low. g1: green bcd semiconductor's pb-free products, as designa ted with "e1" suffix in the part num ber, are rohs compliant. products with "g1" suffix are available in green package.
adjustable-speed single-phase full- wave pre-driver for motor am4967 data sheet 6 oct. 2008 rev. 1. 2 bcd semiconductor manufacturing limited parameter symbol value unit supply voltage v cc 18 v out1b/out2b output current i outb 20 ma out1/out2 sink current i out 20 ma out1b/out2b/out1/out2 withstand voltage v out 18 v vpwm/vmin withstand voltage v pwm /v vmin 7v ls withstand voltage v ls 7v fg/rd withstand voltage v fg /v rd v cc v fg/rd output current i fg /i rd 10 ma vref output current i ref 20 ma power dissipation (note 2) p d 800 mw storage temperature range t stg -55 to 150 o c esd (human body model) esd 2000 v note 1: stresses greater than those li sted under "absolute maximum ratings" may cause permanent damage to the device. these are stress ratings only, and functiona l operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. exposure to "a bsolute maximum ratings " for extended periods may affect device reliability. note 2: when mounted on the specified printed circuit board (114.3mm 76.1mm 1.6mm, glass epoxy). parameter symbol min typ max unit supply voltage v cc 5.5 16 v vpwm/vmin input voltage 0 5 v hall input voltage 0.2 3 v ambient temperature t a -30 105 o c recommended operating conditions absolute maximum ratings (note 1)
7 bcd semiconductor manufacturing limited adjustable-speed single-phase full- wave pre-driver for motor am4967 oct. 2008 rev. 1. 2 data sheet parameter symbol conditions min typ max unit quiescent current i q1 lock off 8 10 12 ma i q2 lock on 8 10 12 vref refere nce voltage v ref i out =5ma 4.5 5.0 5.5 v current limit voltage v lim 186 200 215 mv cosc high level voltage v osch 3.0 3.4 3.8 v cosc low level voltage v oscl 0.9 1.1 1.3 v cosc frequency f osc c l =220pf 25.4 30 35.5 khz ct high level voltage v cth 2.4 3.3 3.6 v ct low level voltage v ctl 1.0 1.3 1.6 v ct charge current i chg v ct =0.5v 1.5 2 2.5 a ct discharge current i dhg v ct =3.5v 0.13 0.2 0.25 a ct charge and discharge ratio r cd i chg /i dhg 8.5 10 14.5 linear start charge current i ls v ls =1v 0.5 0.7 a out1b/out2b high level voltage v obh i out =10ma v cc - 1.8 v cc - 0.9 v cc v out1b/out2b low level voltage v obl i out =10ma 0.9 1.5 v out1/out2 low level voltage v ol i out =10ma 0.45 0.8 v fg signal hall i nput sensitivity v hn i hin+, i hin- difference voltage (include offset and hysteresis) 10 mv fg saturation voltage v sat i sink =5ma 200 500 mv fg leakage current i lfg v fg =v cc 30 a vpwm/vmin bias current i pwmb /i vminb v osc =v pwm /v vmin =2v 0.1 3 a (v cc =12v, t a =25 o c, unless otherwise specified.) electrical characteristics
adjustable-speed single-phase full- wave pre-driver for motor am4967 data sheet 8 oct. 2008 rev. 1. 2 bcd semiconductor manufacturing limited typical performance characteristics figure 4. supply current vs. supply voltage figure 5. supply current vs. ambient temperature figure 6. reference voltage vs. ambient temperature figure 7. reference voltage vs. output current -40-30-20-10 0 1020304050607080 0 2 4 6 8 10 12 14 16 supply current (ma) ambient temperature ( o c) v cc =12v -40-30-20-10 0 102030405060708090 3.5 4.0 4.5 5.0 5.5 6.0 reference voltage (v) ambient temperature ( o c) v cc =12v i out =5ma 0 2 4 6 8 101214161820 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 reference voltage (v) output current (ma) v cc =12v t a =25 o c 2 4 6 8 1012141618 4 6 8 10 12 14 16 supply current (ma) supply voltage (v) t a =25 c
9 bcd semiconductor manufacturing limited adjustable-speed single-phase full- wave pre-driver for motor am4967 oct. 2008 rev. 1. 2 data sheet typical performance characteristics (continued) figure 8. power dissipation vs. ambient temperature -20 0 20 40 60 80 100 0 200 400 600 800 1000 power dissipation (mw) ambient temperature ( c )
adjustable-speed single-phase full- wave pre-driver for motor am4967 data sheet 10 oct. 2008 rev. 1. 2 bcd semiconductor manufacturing limited operating diagram note 3: 1. minimum speed set ting mode (stop mode) when fan rotate at low speed, its lowest speed is settable by vmin pin voltage. if not, fan motor stops. 2. low speed to high speed setting mode pwm control system works by comparing the voltage of vpwm and cosc (1.0v to 3.0v). when vpwm voltage is low, the transistors of the upper and lower side outputs are on. on contrary, when vpwm voltage is high, the upper side transistors are off. and coil current re-circu- lates in a lower side transistor. therefore, as the vpwm voltage becomes lower, output on duty becomes large. sequentially, coil current in creases and the motor runs at high speed which is monitored by fg output while rota- tion-stop state is moni tored by rd output. 3. full speed rotation mode when vpwm voltage drops to 1.0v or lower, motor fan will run at full speed. (if th e speed is not controlled, v pwm =gnd) figure 9. operating diagram 1 of am4967 (speed control, note 3) vpwm voltage f osc =30khz (c osc =220pf) vmin voltage cosc voltage 0v minimum speed setup rotation (stop mode) low speed pwm adjustable speed high speed full speed fg on-duty-large on-duty-small 3.0v 1.0v rpm
adjustable-speed single-phase full- wave pre-driver for motor am4967 data sheet 11 oct. 2008 rev. 1. 2 bcd semiconductor manufacturing limited operating diagram (continued) figure 10. operating diagram 2 of am 4967 (linear start, vpwm voltage < vmin voltage, note 4) figure 11. operating diagram 3 of am4967 (linear start, vpwm voltage > vmin voltage, note 4) ls voltage vmin voltage 0v lock protection linear start vpwm setting speed 3.0v 1.0v on-duty vpwm voltage 100% 0% cosc ls voltage vmin voltage 0v lock protection linear start vmin setting speed 3.0v 1.0v on-duty vpwm voltage 100% 0% cosc
adjustable-speed single-phase full- wave pre-driver for motor am4967 data sheet 12 oct. 2008 rev. 1. 2 bcd semiconductor manufacturing limited operating diagram (continued) figure 12. operating diagr am 4 of am4967 (note 4) note 4: the inclination of ls voltage is adjusted between v ls and v ref according to the capacita nce which is recommended to be 0.1 f to 1.0 f . ls voltage vmin voltage 0v lock protection linear start vmin setting speed 3.0v 1.0v on-duty vpwm voltage 100% 0% cosc rd high level low level
13 bcd semiconductor manufacturing limited adjustable-speed single-phase full- wave pre-driver for motor am4967 oct. 2008 rev. 1. 2 data sheet typical application figure 13. typical application of am4967 (v cc =12v ) vcc vref hin- hin+ vmin vpwm cosc ct gnd out2b out2 cs fg/rd hall am4967 ls 220pf 0.47 f out1b out1 10k ? ~ 100k ? 1k ? 100 ? more than 1 f/25v pwm in more than 1 f/25v (f =30khz) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 out1 out2 power in
adjustable-speed single-phase full- wave pre-driver for motor am4967 data sheet 14 oct. 2008 rev. 1. 2 bcd semiconductor manufacturing limited mechanical dimensions ssop-16 unit: mm(inch) 3.800(0.150) 4.000(0.157) 0.200(0.008) 0.300(0.012) 0.800(0.031) 0.635(0.025) bsc 0.900(0.035) 1.000(0.039) 0.100(0.004) 0.250(0.010) 1.350(0.053) 1.750(0.069) 0.400(0.016) 1.270(0.050) 4.700(0.185) 5.100(0.201) 5.800(0.228) 6.200(0.244) 0.650(0.026) 0.750(0.030) 0.200(0.008) 0.250(0.010) 1.350(0.053) 1.550(0.061) 0.020(0.001) 0.050(0.002) r0.150(0.006) r0.150(0.006) 0.250(0.010) see detail a 7 o 7 o o 8 o 8 o 0.150(0.006) 0.250(0.010) 0 8 o detail a
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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