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1/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. system motor driver ics for cd/dvd players 1ch spindle motor driver ics ba6859afp-y,ba66 64fm,bd6671fm description rohm?s spindle motor drivers incorporate the 3-phase full-wave pseudo-linear drive system(ba6859afp-y, BA6664FM) and 180 electrifying direct pwm drive system(bd6671fm).sm ooth rotation characteristic performance is ensured. besides, high torque is provided in a wide output range because the output stage incorporates low-saturation voltage npn transistors (ba6859afp-y, BA6664FM) and low-power consumption mosfet (ba6671fm). features 1) 3-phase full-wave pseudo-linear system (ba6859afp-y, BA6664FM) 2) 180 electrifying direct drive pwm system (bd6671fm) 3) power saving, tsd (thermal shutdown) functions built in 4) current limiting, hall bias circuit built in 5) fg output built in 6) 3-phase component fg output built in (BA6664FM, bd6671fm) 7) circuit direction detection function built in (ba6859afp-y, BA6664FM) 8) reverse rotation prevention circuit built in 9) short brake pin built in (ba6859afp-y, BA6664FM) 10) brake mode selection pin built in (ba6859afp-y, bd6671fm) 11) supports dsp 3.3 v applications used for car, cd and dvd players incorporating changer function absolute maximum ratings (ta=25 ) parameter symbol ratings unit ba6859afp-y BA6664FM bd6671fm applied voltage v cc 7 7 7 v applied voltage v m 15 15 15 v applied voltage v g - - 20 v power dissipation pd 1450* 1 2200* 2 2200* 2 mw operating temperature topr -40 +85 -40 +85 -40 +85 storage temperature tstg -55 +150 -55 +150 -55 +150 output current iout 1300 1300 2500 ma junction temperature tjmax 150 150 150 *1 reduced by 11.6 mw/ over 25 , when mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm). *2 reduced by 17.6 mw/ over 25 , when mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm). line up matrix parameter symbol ratings unit ba6859afp-y BA6664FM bd6671fm power supply voltage v cc 4.5 5.5 4.5 5.5 4.5 5.5 v v m 3.0 14 3.0 14 4.0 13.2 v vg pin voltage v g - - 8.5 19 v no.10011eat03
ba6859afp-y,ba66 64fm,bd6671fm technical note 2/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. 0 2 4 6 8 10 4.5 5 5.5 6 6.5 7 supply voltag e :vcc[v] circuit current :icc2 [ma] 0.0 0.5 1.0 1.5 0 0.3 0.6 0.9 1.2 1.5 output cur rent :ioh[v] output h voltage:v oh [v] 0.0 0.5 1.0 1.5 0 0.3 0.6 0.9 1.2 1.5 output cur rent :i ol [a] output l voltage :v ol [v] electrical characteristics 1) ba6859afp-y (unless otherwise specified, ta=25 , v cc =5.0v, v m =12v) parameter symbol limits unit conditions min. typ. max. circuit current 1 i cc1 0 0.2 ma ps=l circuit current 2 i cc2 5.0 7.5 ma ps=h on voltage range v pson 1.0 v internal circuit off off voltage range v psoff 2.5 v internal circuit on hall bias voltage v hb 0.5 0.9 1.5 v i hb =10ma input bias current i ha 0.7 3.0 a same phase input voltage range v har 1.0 4.0 v mini. input level v inh 50 mvpp one side input level h3 hysteresis level v hys 5 20 40 mv input voltage range e c , e cr 0 5 v linear range:0.5 3.3v offset voltage - e coff- -80 -50 -20 mv e cr =1.9v offset voltage + e coff+ 20 50 80 mv e cr =1.9v input bias current e cin -3 3 a e c =e cr i/o gain g ec 0.56 0.70 0.84 a/v e c =1.2, 1.7v fg output high-level voltage v fgh 4.5 4.8 v i fg =-20a fg output low-level voltage v fgl 0.25 0.4 v i fg =3.0ma duty (reference values) d u 50 % fr output high-level voltage v frh 4.1 4.4 v i fr =-20a fr output low-level voltage v frl 0.25 0.4 v i fr =3.0ma output saturation high level voltage v oh 1.0 1.4 v i o =-600ma output saturation low level voltage v ol 0.4 0.7 v i o =600ma pre-drive current i vml 35 70 ma e c =0v output open output limit current i tl 560 700 840 ma on voltage range v sbon 2.5 v br=0v off voltage range v sboff 1.0 v br=0v on voltage range v bron 2.5 v e c >e cr , sb=open off voltage range v broff 1.0 v e c >e cr , sb=open reference: data fig.1 circuit current 2 fig.2 output satu ration voltage at high level fig.3 output satu ration voltage at low level 85 25 -40 85 25 -40 85 25 -40
ba6859afp-y,ba66 64fm,bd6671fm technical note 3/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. 2) BA6664FM(unless otherwise specified, ta=25 , v cc =5.0v, v m =12v) parameter symbol limits unit conditions min. typ. max. circuit current 1 i cc1 0 0.2 ma ps=l, gsw=open circuit current 2 i cc2 6.2 9.1 ma ps=h, gsw=open on voltage range v pson 1.0 v internal current circuit off off voltage range v psoff 2.5 v internal current circuit on hall bias voltage v hb 0.5 0.9 1.5 v i hb =10ma input bias current i ha 0.7 3.0 a same phase input voltage range v har 1.0 4.0 v mini. input level v inh 50 mvpp one side input level h3 hysteresis level v hys 5 20 40 mv input voltage range e c , e cr 0 5 v linear range:0.5 3.3v offset voltage - e coff- -75 -45 -15 mv e cr =1.65v, gsw=l offset voltage + e coff+ 15 45 75 mv e cr =1.65v, gsw=l input bias current e cin -3 3 a e c =e cr i/o gain low-level g ecl 0.52 0.65 0.78 a/v gsw=l,rnf=0.5 i/o gain medium-level g ecm 1.04 1.3 1.56 a/v gsw=open,rnf=0.5 i/o gain high-level g ech 2.24 2.8 3.36 a/v gsw=h,rnf=0.5 fg output high-level voltage v fgh 4.5 4.8 v i fg =-20a fg output low-level voltage v fgl 0.2 0.4 v i fg =3.0ma fg output high-level voltage v fg2h 4.6 4.9 v ifg2 =-20a fg output low-level voltage v fg2l 0.2 0.4 v i fg2 =3ma fr output high-level voltage v frh 4.1 4.4 v i fr =-20a fr output low-level voltage v frl 0.2 0.4 v i fr =3.0ma output saturation high-level voltage v oh 1.0 1.35 v i out =-600ma output saturation low-level voltage v ol 0.4 0.65 v i out =600ma pre-drive current i vml 35 70 ma e c =0v output open output limit current i tl 560 700 840 ma on voltage range v sbon 2.5 v br=0v off voltage range v sboff 1.0 v br=0v on voltage range v bron 2.5 v e c >e cr , sb=open off voltage range v broff 1.0 v e c >e cr , sb=open low voltage range v gswl 1.0 v high voltage range v gswh 3.0 v open voltage v gswop 2.0 v
ba6859afp-y,ba66 64fm,bd6671fm technical note 4/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. 3) bd6671fm (unless otherwise specified, ta=25 , v cc =5.0v, v m =12v) parameter symbol limits unit conditions min. typ. max. circuit current 1 i cc1 100 200 a ps=l, gsw=open circuit current 2 i cc2 8 14 20 ma ps=h, gsw=open on voltage range v pson 1.0 v internal current circuit off off voltage range v psoff 2.5 v internal current circuit on hall bias voltage v hb 0.7 1.0 1.3 v i hb =10ma same phase input voltage range v har 1.4 3.6 v mini. input level v inh 100 mvpp both side input level hall hysteresis level + v hys+ 5 20 40 mv hall hysteresis level - v hys- -40 -20 -5 mv low voltage range v gswl 0.6 v high voltage range v gswh 2.0 v open voltage range v gswop 1.3 v input voltage range e c , e cr 0 5 v linear range: 0.5 3.0v offset voltage + e coff+ 5 50 100 mv gsw=m offset voltage - e coff- -100 -50 5 mv gsw=m input current e cin -11 -2.5 0 a e c =e cr =1.65v i/o gain low-level g ecl 0.28 0.35 0.42 a/v gsw=l i/o gain medium-level g ecm 0.56 0.70 0.84 a/v gsw=m i/o gain high-level g ech 1.12 1.40 1.68 a/v gsw=h output on resistance r on 1.0 1.35 i out = 600ma (upper + lower side) output limit current low-level i tll 340 400 460 ma gsw=l output limit current medium-level i tlm 680 800 920 ma gsw=m output limit current high-level i tlh 1020 1200 1380 ma gsw=h high level voltage v fgh 4.6 v i fg =-100a low level voltage v fgl 0.4 v i fg =+100a charge pump output voltage v pump 12.5 17 19 v v cc = 5v,v m =12v cp1=cp2=0.1f upper side saturation voltage v cp1h 0.25 0.45 0.65 v i cp 1=-4ma lower side saturation voltage v cp1l 0.2 0.4 0.6 v i cp1 =+4ma upper side saturation voltage v cp2h 0.4 0.6 0.8 v i cp2 =-4ma lower side saturation voltage v cp2l 0.15 0.35 0.55 v i cp2 =+4ma
ba6859afp-y,ba66 64fm,bd6671fm technical note 5/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. block diagram, application circuit diagram and pin function 1) ba6859afp-y fig.4 ba6859afp-y block diagram ba6859afp-y pin function table pin no. pin name function 1 n.c. n.c. 2 n.c. n.c. 3 n.c. n.c. 4 a3 output pin 5 a2 output pin 6 a1 output pin 7 gnd gnd pin 8 h1+ hall signal input pin 9 h1- hall signal input pin 10 h2+ hall signal input pin 11 h2- hall signal input pin 12 h3+ hall signal input pin 13 h3- hall signal input pin 14 vh hall bias input pin 15 br brake mode selection pin 16 cnf capacitor connection pin for phase compensation 17 sb short brake pin 18 fr rotation detection pin 19 ecr output voltage control reference pin 20 ec output voltage control pin 21 ps power-saving pin 22 fg fg signal output pin 23 vcc power supply pin 24 vm motor power supply pin 25 rnf resistance connection pin for output current detection fin fin gnd pd (w) 2.0 1.0 1.45 100 50 75 150 ta( ) 125 0 25 85 fig.5 power dissipation reduction (ba6859afp-y) * reduced by 11.6 mw/ over 25 , when mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm).
ba6859afp-y,ba66 64fm,bd6671fm technical note 6/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. 0 25 50 75 100 125 150 1.0 2.0 2.2 pd[w] ta( ) 85 fig.7 power dissipation reduction (BA6664FM bd6671fm) * reduced by 11.6 mw/ over 25 , when mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm). 2) BA6664FM fig.6 BA6664FM block diagram BA6664FM pin function table pin no. pin name function 1 n.c. n.c. 2 a3 output pin 3 n.c. n.c. 4 a2 output pin 5 n.c n.c. 6 n.c. n.c. 7 a1 output pin 8 gnd gnd pin 9 h1+ hall signal input pin 10 h1- hall signal input pin 11 h2+ hall signal input pin 12 h2- hall signal input pin 13 h3+ hall signal input pin 14 h3- hall bias input pin 15 vh hall bias input pin 16 br brake mode pin 17 cnf capacitor connection pin for phase compensation 18 sb short brake pin 19 fg2 fg 3-phase component output pin 20 fr rotation detection pin 21 ecr output voltage control reference pin 22 ec output voltage control pin 23 ps power-saving pin 24 fg fg signal output pin 25 vcc power supply pin 26 gsw gain switching pin 27 vm motor power supply pin 28 rnf resistance connection pin fo r output current detection fin fin gnd ps tl tsd gain control driver 14 13 12 11 10 9 8 7 4 2 28 26 27 25 23 24 21 22 19 20 17 18 fin hall amp vcc torque sense amp - + - + vh br sb fg2 fr ecr ec ps fg vcc gsw vm rnf current sense amp 15 hall bias brake mode vcc h3 - h3+ h2- h2+ h1 - h1+ gnd a1 a2 a3 vcc ck r d q hall1 hall1 hall1 1f servo signal v m 0.5 + - the power saving mode is turned on by low-level voltage, and the circuit current and motor output will stop. if the ecr voltage is set between 1.6 and 2.2v, the maximum torque limit current will be obtained. the detection of motor rotation direction is possible. the short brake is operated regardless of brake mode settings. connect a capacitor for phase compensation. the recommended value is 0.1f. short brake and reversed brake settings are possible. the motor torque current is controllable. 500 0.1f 500 capacitor for noise level mitigation. the recommended value is 0.47 f to 10 f. + - speed detection is attained by fg signal output. resistor for setting hall input level . the recommended value is 200 to 1k . output will be open when the reverse rotation of the motor is detected. output to the motor will be opened at a chip tempe 175c (typ.). do not use the ic in excess of a chip rature of temperature of 150c. torque limit current and i/o gain settings are made by the rnf resistance value. resistance of 0.4 to 1.0 is recommended. 16 cnf q short brake gain switch - + - + - + - + - + i/o gain 1f rnf
ba6859afp-y,ba66 64fm,bd6671fm technical note 7/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. 3)bd6671fm fig.8 bd6671fm block diagram bd6671fm pin function pin no pin name function pin no pin name function 1 h1+ hall signal input pin 15 vm motor power supply pin 2 h1- hall signal input pin 16 ecr output voltage control reference pin 3 h2+ hall signal input pin 17 ec output voltage control pin 4 h2- hall signal input pin 18 ps power-saving pin 5 h3+ hall signal input pin 19 rnf2 resistance connection pin for output current detection 6 h3- hall signal input pin 20 a3 output pin 7 gsw gain switching pin 21 rnf1 resistance connection pin for output current detection 8 gnd gnd 22 a2 output pin 9 cp1 charge pump capacity connection pin 1 23 rnf1 resistance connection for output current 10 cp2 charge pump capacity connection pin 2 24 a1 output pin 11 vg charge pump output pin 25 vm motor power supply pin 12 cnf capacitor connection pin for phase compensation 26 vh hall bias pin 13 mode brake mode switching pin 27 fg fg output pin 14 vcc power supply pin 28 fg3 fg3 output pin fin fin gnd *heat radiation fin: gnd 1 set capacitor between vm and gnd, close as possible to the ic. 2 to prevent from concentration of current routes, make the wiring impedance values from the powe r supply equal as possible. h3+ h3 - h2+ h2- hall comp hall amp h1+ h1- 200 200 vh hall bias vcc 10f mode matrix cnf vg cp2 cp1 0.1 f gnd a3 a2 a1 rnf1 rnf 0.5 rnf2 10k 0.01f ps ps vcc fg fg3 vm 100 f vm torque amp ec ecr servo signal 1.65v gsw charge pump driver u-pre driver l-pre driver matrix tsd exor + - current sense amp cl d q ck qb reverse detect pwm comp gain control vcc 1000pf osc curre nt limit comp uvlo 0.1 f 0.047f vcc 2 1 h1 h2 h3 1000pf 1000pf + - + - fin fin
ba6859afp-y,ba66 64fm,bd6671fm technical note 8/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. i/o logic 1) ba6859afp-y input conditions output conditions forward rotation reverse rotation pin. no 8 9 10 11 12 13 6 5 4 6 5 4 h1 + h1 - h2 + h2 - h3 + h3 - a1 a2 a3 a1 a2 a3 input voltage hi=2.6v mid=2.5v low=2.4v 1 l m h m m m h l l l h h 2 h m l m m m l h h h l l 3 m m l m h m l h l h l h 4 m m h m l m h l h l h l 5 h m m m l m l l h h h l 6 l m m m h m h h l l l h note: forward rotation ececr 2) BA6664FM input conditions output conditions forward rotation reverse rotation pin. no 9 10 11 12 13 14 7 4 2 7 4 2 h1 + h1 - h2 + h2 - h3 + h3 - a1 a2 a3 a1 a2 a3 input voltage hi=2.6v mid=2.5v low=2.4v 1 l m h m m m h l l l h h 2 h m l m m m l h h h l l 3 m m l m h m l h l h l h 4 m m h m l m h l h l h l 5 h m m m l m l l h h h l 6 l m m m h m h h l l l h note: forward rotation ececr 3)bd6671fm input conditions output conditions forward rotation reverse rotation (mode=l) reverse rotation (mode=h) pin. no 1 2 3 4 5 6 24 22 20 24 22 20 24 22 20 h1 + h1 - h2 + h2 - h3 + h3 - a1 a2 a3 a1 a2 a3 a1 a2 a3 input voltage hi=2.6v mid=2.5v low=2.4v 1 l m h m m m h l l l h h l l l 2 h m l m m m l h h h l l l l l 3 m m l m h m l h l h l h l l l 4 m m h m l m h l h l h l l l l 5 h m m m l m l l h h h l l l l 6 l m m m h m h h l l l h l l l note: forward rotation ececr
ba6859afp-y,ba66 64fm,bd6671fm technical note 9/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. a1 output current h1 - + h2+ h3+ h2+ h1+ 30 a1 output current a2 output current h2 - + h3+ a2 output current a3 output current h3 - + h1+ a3 output current i/o timing chart 1) ba6859afp-y, BA6664FM fig. 9 2) bd6671fm fig. 10 30 h1+ h2+ h3+ a1 output current a1 output voltage a2 output voltage a2 output current
ba6859afp-y,ba66 64fm,bd6671fm technical note 10/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. i/o circuit 1) ba6859afp-y (1) power saving (pin 21) (6) fg output (pin 22) (2) torque command input (pin 19, pin 20) (7) fr output (pin 18) (3) coil output (a1: pin 6, a2: pin 5, a3: pin 4) (8) short brake (17 pin) (4) hall input (h1+ : 8 pin, h1- : 9 pin, h2+ : 10 pin, h2- : 11 pin, h3+ : 12 pin, h3- : 13 pin) (9) brake mode (15 pin) (5) hall bias (14 pin) external rnf register 6 5 v m rnf 4 gnd 1k 1k 14 100k 21 15k 10k 18 30k 17 12k 5k 1k 13k 500 500 10k 10k 15k 15 22 10k vcc 20 19 1k 1k
ba6859afp-y,ba66 64fm,bd6671fm technical note 11/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. 2) BA6664FM (1) power saving (23 pin) (7) fg output (19 pin) (2) torque command input (21 pin, 22 pin) (8) fr output (20 pin) (3) coil output (a1 : 7 pin, a2 : 4 pin, a3 : 2 pin) (9) short brake mode (18 pin) (4) hall input (h1+ : 9 pin, h1- : 10 pin, h2+ : 11 pin, h2- : 12 pin, h3+ : 13 pin, h3- : 14 pin) (10)brake mode (16 pin) (5) hall bias (15 pin) (11) gain switch (26 pin) (6) fg output (24 pin) 1k 1k 15 100k 23 15k 10k vcc 19 5k 24 10k vcc 22 21 1k 1k 10k 15k 16 vcc 20 30k 13k 500 500 10k 18 12k 5k 1k 26 1k 30k 5k 5k 56k 100k 7 4 v m external rnfregister rnf 2
ba6859afp-y,ba66 64fm,bd6671fm technical note 12/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. vcc vcc 50 9 vm 50 11 50 10 24 22 20 v m rnf1 vcc 12 50 2k vcc 100k 26 vcc vcc 50 27,28 3) bd6671fm (1) hall input (h1 : 1 pin, h1-: 2 pin, h2+ : 3 pin, (6) brake mode selection pin (13 pin) h2- : 4 pin, h3+ : 5 pin, h3- : 6 pin) (2) gain switch (7pin) (7) torque amp (ecr : 16 pin, ec : 17 pin) (3)cp1 output (9pin) (8) power saving (18 pin) (9)rnf2(19 pin) (4) cp2 / vg output (cp2 : 10 pin, v g : 11 pin) (10) output pin (a 1 : 24 pin, a 2 : 22 pin, a 3 : 20 pin) (5) cnf pin (12 pin) (11) hall bias (26 pin) (12) fg / fg3 output (fg : 27 pin, fg3 : 28 pin) vcc hn + vcc hn - 1k 1k 1k 25k vcc 13 30k 20k vcc 7 1k 75k vcc 100k 10k 10k 25k vcc 16,17 1k vcc 18 30k 20k 710 1k vcc 19
ba6859afp-y,ba66 64fm,bd6671fm technical note 13/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. operation explanation torque command rotation direction ececr reverse* *stops after detecting reverse rotation the i/o gain g ec from the ec pin to the rnf pin (output current) is determined by the rnf detection resistor. (ba6859afp-y) g ec =0.35/rnf [a/v] ????? (1) (BA6664FM) g ecl =0.325/rnf [a/v] (gsw=l) g ecm =0.60/rnf [a/v] (gsw=open) g ech =1.4/rnf [a/v] (gsw=h) (bd6671fm) g ecl =0.175/rnf [a/v] (gsw=l) g ecm =0.35/rnf [a/v] (gsw=m) g ech =0.70/rnf [a/v] (gsw=h) the following torque limit current itl is obtained (ba6859afp-y, BA6664FM) i tl =0.35/rnf [a] ??????????????????? (2) (bd6671fm) i tll =0.2/rnf [a] (gsw=l) i tlm =0.4/rnf [a] (gsw=m) i tlh =0.6/rnf [a] (gsw=h) the value will become smaller than the computed value due to the wiring capacity and other factors, if the rnf resistance is 0.5 or below. set-up of motor rotation direction and voltage range of torque control reference terminal. the motor rotation direction determined by the torque control terminal voltage ec and the torque control reference terminal voltage ecr torque control input voltage rotation direction ececr reverse torque the relation between the input gain and torque limit current expressed as (1) and (2) discussed previously is only valid when ec and ecr are within a range from 0.5v to 3.3v. dep ending on how the torque control reference terminal voltage, ecr is specified, there may be a case when the output current for the motor does not go up to the torque limit value. please be aware of this voltage range when specifying the ecr voltage. for ba6859afp-y, BA6664FM and bd6671fm, 1.6v 2.2v is recommended. if above conditions are understood, the voltage input range to the ec and ecr terminals can be from 0v to vcc. power saving the input circuit specified in i/o circuit 1) ba6859afp-y (1) is used for power saving input. the power saving pin has a temperature c haracteristic of approximately ?5 mv/ and also the built-in resistors has a dispersion of 30%. keep the input voltage range in mind. i tl io 2.5 e c [v] forward torque reverse torque 0.5 3.3 5.0 fig.12 forward r nf [v] e c [v] 1.65(ecr) 3mv offset voltage - offset voltage + fig.11
ba6859afp-y,ba66 64fm,bd6671fm technical note 14/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. reverse rotation detection function actual motor rotation at reverse detection fig. 13 shows the construction of the reverse rotation detection circuit. ? forward rotation (ececr) the phase relation of the h2+ and h3+ signals are opposite to t hat when the motor is rotating in the forward direction. therefore, the reverse rotation detection circui t operates, and the output is turned off and open. fr signal output (ba6859afp-y, BA6664FM) fr output signal pin outputs the fr signal of low(l) or high(h) after detecting the motor rotation direction. motor rotation direction fr signal output forward ?h? reverse ?l? brake mode change (BA6664FM, bd6671fm) by applying high-level voltage to the br pin, the brake mode for the following condition can be changed: ec > ecr. ececr br l forward rotation reverse rotation brake h forward rotation short brake when the br pin is set to high level and used in short-brake mode, open the sb pin. the br pin has a temperature charac teristics of approximately -5 mv/ . use the br pin within the permissible input range. short brake (ba6859afp-y, BA6664FM) when the short-brake pin is set to high level, as shown in fig.18, the output transistor (3-phase) on the high side will be turned off and the output transistor (3-phase) on the low side will be turned on. the short brake pin has a temperature characteristic of approximately -5 mv/ . keep the input voltage range (see fig12) in mind. hall input the hall element allows both serial and parallel connections. set the hall input voltage betwe en 1.0 and 4.0 v. compute the resistance between the vh and vcc pins in consideration of the flowing current of the hall device. d-ff fig.14 ec < ecr: forward torque (forward rotation) ec > ecr: deceleration (forward rotation) when the motor rotates in the reverse direction, the reverse rotation detection function will operate and the output will be in an open state. the motor rotates in a reverse direction with inertial force. stop motor a a a o on on on off off off 15-pin (hall bias) parallel connection 15-pin (hall bias) serial connection v cc h3 v cc h2 h1 h3 h2 h1 fig.15 fig.13 + - h2 + h2- q d ck h:output.open (high-impedance ) + - + - h3 + h3- ec ecr
ba6859afp-y,ba66 64fm,bd6671fm technical note 15/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. fig. 16 fig. 17 + - h1 + h1- + - + - h2 + h2- h3+ h3- h1 h2 h3 fg2 fg fg signal output / fg2 signal output the fg signal output/fg2 signal output terminals are for detec ting the motor rotation speed. the output frequency of fg2 signal is three times higher than the fg frequency signal output. so, it is suitable for the slow speed rotation detection. however, due to the hall device variation and other reason s, the duty cycle may not reach 50% in some instances. notes for use (1) absolute maximum ratings this product is subject to a strict quality management regi me during its manufacture. however, damage may result if absolute maximum ratings such as applied voltage and oper ating temperature range are exceeded. assumptions should not be made regarding the stat e of the ic (short mode or open mode) when such damage is suffered. a physical safety measure such as a fuse should be implemented when use of the ic in a special mode where the absolute maximum ratings may be exceeded is anticipated. (2) connecting the power supply connector backward connecting the power supply connector backwards may result in damage to the ic. insert external diodes between the power supply and the ic's power supply pins as well as the motor coil to protect against damage from backward connections. (3) power supply lines as return of current regenerated by ba ck electromotive force of motor happens, take steps such as putting capacitor between power source and gnd as an electric pathway for the r egenerated current. be sure that there is no problem with each property such as emptied capacity at lower temperature regarding electrolytic capacitor to decide capacity value. if the connected power supply does not have sufficient current absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combined wi th the product and its peripheral circuitry may exceed the absolute maximum ratings. it is recommended to implement a phys ical safety measure such as the insertion of a voltage clamp diode between the power supply and gnd pins. (4) gnd potential ensure a minimum gnd pin potentia l in all operating conditions. (5) setting of heat take the power dissipation pd) into account for practical app lication and make thermal design with sufficiently margined. (6) pin short and mistake fitting use caution when orienting and positioning the ic for moun ting on printed circuit boards. improper mounting may result in damage to the ic. shorts between output pins or between output pins and the power supply and gnd pins caused by the presence of a foreign object may result in damage to the ic. (7) actions in strong magnetic field use caution when using the ic in the pres ence of a strong magnetic field as doi ng so may cause the ic to malfunction. h 1 waveform h 2 waveform h 3 waveform fg waveform fg2 waveform
ba6859afp-y,ba66 64fm,bd6671fm technical note 16/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. (8) aso when using the ic, set the output transistor so that it does not exceed absolute maximum ratings or aso. (9) thermal shutdown circuit (tsd) this ic incorporates a tsd circuit. if the chip becomes the following temperature, coil out put to the motor will be open. the tsd circuit is designed only to shut the ic off to prevent runaway thermal operation. it is not designed to protect the ic or guarantee its operation. do not cont inue to use the ic after operating this ci rcuit or use the ic in an environment where the operation of the tsd circuit is assumed. tsd on temperature [ ] (typ.) hysteresis temperature [ ] (typ.) ba6859afp-y 175 25 BA6664FM 175 15 bd6671fm 170 25 (10) regarding input pin of the ic this monolithic ic contains p+ isolation and p substrate layers between adjacent elements in order to keep them isolated. p/n junctions are formed at the intersecti on of these p layers with the n layers of other elements to create a variety of parasitic elements. for example, when the resistors and transistors ar e connected to the pins as shown in fig. 18, the p/n junction functions as a parasitic diode when gnd > (pin a) for the resistor or gnd > (pin b) for the transistor (npn). similarly, when gnd > (pin b) for the transistor (n pn), the parasitic diode described above combines with the n layer of other adjacent elements to operate as a parasitic npn transistor. the formation of parasitic elements as a result of the relationships of the potentials of different pins is an inevitable resul t of the ic's architecture. the operation of parasitic elements c an cause interference with circuit operation as well as ic malfunction and damage. for these reasons, it is necessary to use caution so that the ic is not used in a way that will trigger the operation of parasitic elements, such as by the application of voltages lowe r than the gnd (p substrate) voltage to input pins. fig.18 example of ic structure (11) testing on application boards when testing the ic on an application board, connecting a capa citor to a pin with low impedance subjects the ic to stress. always discharge capacitors after each process or step. ground the ic during assembly steps as an antistatic measure, and use similar caution when transporting or storing the ic. always turn the ic's power supply off before connecting it to or removing it from a jig or fixture during the inspection process. (12) ground wiring pattern when using both small signal and large current gnd pattern s, it is recommended to isolate the two ground patterns, placing a single ground point at the application's referenc e point so that the pattern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal ground voltage. be careful not to change the gnd wiring pattern of any external parts, either. resistor transistor (npn) n n n p + p + p p substrate gnd parasitic element pin a n n p + p + p p substrate gnd parasitic element pin b c b e n gnd pin a p aras iti c element pin b other adjacent elements e b c gnd parasitic element
ba6859afp-y,ba66 64fm,bd6671fm technical note 17/17 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. ordering part number b a 6 6 6 4 f m - e 2 part no. ba bd part no. 6859a 6664 6671 package fp-y : hsop25 fm : hsop-m28 packaging and forming specification e2: embossed tape and reel ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 1500pcs e2 () direction of feed reel 1pin (unit : mm) hsop-m28 (max 18.85 include burr) 0.8 7.5 0.2 15 5.15 0.1 0.11 1.25 2.2 0.1 1 18.5 0.2 0.5 0.2 0.37 0.1 9.9 0.3 4 +6 ? 4 28 1.2 0.15 14 0.27 +0.1 ? 0.05 s 0.1 s (unit : mm) hsop25 7.8 0.3 5.4 0.2 2.75 0.1 1.95 0.1 25 14 1 13 0.11 1.9 0.1 0.36 0.1 12.0 0.2 0.3min. 0.25 0.1 13.6 0.2 0.8 (max 13.95 include burr) s 0.1 s ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2000pcs e2 () direction of feed reel 1pin
r1010 a www.rohm.com ? 2010 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the products. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redunda ncy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospac e machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

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