spindle motor driver m 56 755 f p mitsubishi + - +- +- +- matrix vm 120? uv w vcc1 ec ecr hu+ hu- hv+ hv- hw+ hw- s/s 34 35 36 19 20 21 22 23 24 13 15 16 1 rs ci 18 hall bias hb i / i v/i converter converter 14 vcc2 fg rds 3 2 + gnd mode4 31 sense 32 mode3 mode2 mode1 5 6 4 braking mode change gnd vref tsd pi n c o n f i g urat i o n ( to p v i e w ) outline 36p2r-d 36 33 34 35 1 4 3 2 32 5 31 6 28 9 27 10 26 11 25 12 13 14 24 23 7 8 30 29 15 22 16 21 17 20 18 19 des cri pt i o n the M56755FP is a semiconductor integrated circuit designed for a single chip controller for cd-rom spindle motor. M56755FP has a both (forward and reverse) motor torque control by the motor speed control terminal. M56755FP has the several braking mode that an user can flexibly select in order to generate the reverse torque. also, this device includes a bias circuit for hall sensor, a current limit circuit and a thermal shut down function. f e at ures l the supply voltage with wide range. (4.5v to 13.2v) l high motor drive current (1.2a) l motor current control for the both motor torque is possible. l reverse torque mode select (short braking, etc) l sleep mode l hall amplifier sensitivity select l automatic stop select (with reverse detected signal pin) app l i cat i o n cd-rom, dvd, dvd-rom etc. b l oc k d ia gr a m hb gnd vm ci ec ecr vcc1 s/s vcc2 rds fg mode2 mode1 hu+ hw- hv- hu- hv+ hw+ w v gnd u rs mode3 mode4 m5 6755f p 7 8 25 26 27 28 9 10 11 12 28 30 29 fg rds 1 7 33
spindle motor driver m 56 755 f p mitsubishi symbol vm vcc2 vcc1 lo vh(c) pt k q tj topr tstg pin maximum input voltage pin maximum input voltage pin maximum input voltage *note 1 to pins free air free air abs o l ut e m axi m um ra t i ng ( ta=25?c ) rating unit parameter conditions 16 16 7.0 1.5 4.5 1.2 9.6 150 -20 ? +75 -40 ? +125 v v v a v w mw/?c ?c ?c ?c * n ote1 ; there is no overing pt (power dissipation) or the area of safety operation * the pin[rds] and pin[fg] are with pull-up resistor (10kohm). 1 2 3 4 5 6 7 to 12 13 14 15 16 17 18 19 20 21 22 23 24 25 to 30 31 32 33 34 35 36 s/s rds fg ci mode2 mode1 gnd vm vcc2 ec ecr vcc1 hb hu+ hu- hv+ hv- h w + h w - gnd mode4 mode3 rs u v w start / stop pin no. function symbol pi n d e s cri pt i o n reverse detected signal frequency generator output phase compensation reverse torque mode select 2 reverse torque mode select 1 gnd motor supply voltage 12v supply voltage motor speed control the reference voltage for ec 5 v supply voltage bias for hall sensor hu+ sensor amp. input hu- sensor amp. input h v + sensor amp. input h v - sensor amp. input h w + sensor amp. input h w - sensor amp. input gnd hall amplifier sensitivity select automatic stop select motor current sense motor drive output u motor drive output v motor drive output w motor supply voltage 12v supply voltage 5 v supply voltage output current sensor amp. differential input range power dissipation thermal derating junction temperature operating temperature storage temperature 2 3 13 14 17 19 24
spindle motor driver m 56 755 f p mitsubishi pin input voltage when makes the motor stop. *the ics will be the sleep condition. *the hall bias will be off. pin [mode1], pin [mode2], pin [mode3] and pin [mode4] input voltage when makes low level. ?pins input signal ?pins input range. pin input voltage range. (3.3v dsp available) pin input voltage range. (3.3v dsp available) pin input current (ec=ecr=2.5v) [ pin hi] pin input current [ pin lo or open] and pin total input current [ pin lo or open] pin [rds], pin [fg] output low voltage limits min. typ. max. unit symbol parameter rec o m m e nde d o pera t i n g c o ndi t i o n s vcc1 vcc2 vm lo 5v power supply 4.5 4.5 4.5 5.0 12.0 12.0 5.5 13.2 13.2 700 v v v ma vhb ihb von voff vih vil vol 0.6 2.0 2.0 30 0.8 0.8 0.5 ma v v v v v 1.2 0.85 v limits min. typ. max. symbol test conditions unit parameter el ect r i cal charact eri s t i cs ( vcc=5v, vcc2=12v, vm=12v, ta=25?c unless otherwise noted ) sleep mode supply current-1 lcc1 vsat lcc2 lcc3 0 1.2 100 500 6.0 1.9 m a m a ma v ec < ecr ec > ecr ecdead- ecdead+ -50 +5 -25 +25 -5 +50 mv lo = gio /rsense [a/v] llim=vlim / rsense [a] mode4 = open mode4 = gnd ecr ec gio vlim vh com vhmin1 vhmin2 0.5 0.5 1.95 0.27 1.2 50 35 1.65 2.3 0.3 4.0 4.0 2.65 0.33 4.5 v v v/v v v mvp-p 12 v power supply motor power supply output drive current sleep mode supply current-2 control voltage dead zone supply current-3 s aturation voltage reference voltage input range control voltage input range control gain control limit hall sensor amp common mode input range hall sensor amp. input signal level hall bias terminal output voltage hall bias terminal sink current motor start voltage motor stop voltage m ode pin input high voltage mode pin input low voltage top and bottom saturation voltage. load current 500ma load current (ihb) 10ma. at io current = 1ma pin [mode1], pin [mode2], pin [mode3] and pin [mode4] input voltage when makes high level. pin input voltage when makes the motor start up. *the ics will be the active condition. *the hall bias will be available. 13 14 17 17 1 1 1 16 15 19 24 19 24 1 1 6 31 2 32 31 6 3 5 32 5 1.65
spindle motor driver m 56 755 f p mitsubishi 0 +5 ? +50mv -5 ? -50mv current limit 4.6a/v 4.6a/v current limit forward tor q ue reverse tor q ue ec - ecr el ect r i cal charact eri s t i cs ( vcc=5v, vm=12v, ta=25?c, unless otherwise noted. ) fi g ur e 1 . t h e ch ara c ter i st i c s o f t he c ont ro l v o l ta g e a n d m o t o r c ur re nt ( to r q ue ) . the relationship between the ec (control voltage), ecr (reference voltage) and the torque i s a s shown in figure 1. the current gain is 4.6a/v (at sensing resistor : 0.5ohm) in the both torques and a dead zone i s 5mv to 50mv.
spindle motor driver m 56 755 f p mitsubishi hal l am p l i f i e r i n put a nd co m m ut at i o n sl ee p m o d e f unct i o n fi gur e 3 . mode4 open or high gnd 120 degree soft switching 120 degree switching ** io current will be shape. the hall amp input voltage minimum is 50mvp-p. the hall amp input voltage minimum is 35mvp-p. the relationship between the hall amplifier inputs voltage and the motor current outputs is as shown in figure 2. hal l a m p l i f i e r i n put sens i t i vi t y se l e c t figure 3 shows the hall amplifier input sensitivity select function. an user is able to select the sensitivity of a hall amplifier to match with the hall elements type. if the output minimum level of a hall elements is a low level as below 50mvp-p, please connect the mode4 to gnd at external. in this case, the output current will be shape. if the output minimum level of a hall elements is more higher than 50mvp-p, please make the mode4 to open, then the output current will be commutated softly. we recommend that the output level of a hall element is used for 80mvp-p to 120mvp-p and the mode4 is made to open. start / stop low or open high motor stop bias off hall-bias off motor on bias on hall-bias on fi gur e 4 . figure 4 shows the sleep mode function. if the 1pin [s/s] is set to open or low, the current output will be high impedance and then the motor will be stop. also, the ic bias current wil be a slight current (please make reference the electrical characteristics). at the same time, the hall bias output will be cut off. when the 1pin goes high, the all of circuits will be available. fi gur e 2 . hu+ hv+ hw+ u w v u w w v u v u v w hall elements outer loator forward reverse ececr sink sourse output current hall inputs u w v v u v w w u
spindle motor driver m 56 755 f p mitsubishi fi gur e 5 . hall sensor-amp fg-amp rds fg t d q + - + - hu+ hv+ hw+ low reverse hu+ hv+ hw+ d forward q hi g h low comparator h y steresis low rds fg low fg ci q mode3 r ec-ecr rds vcc1 vcc1 hu+ hu- hv+ hv- hw+ hw- t hi g h d q hi g h t hi g h fi gur e 6 . open or high gnd mode3 automatic stop (non-stop) un-automatic f g f unct i o n figure 5 shows the circuits and function of the frequency genera- tor, too. the fg is the pin that output the signal synchronize with the hall inputs [hv+ and hv-] timming. the fg pin is pulled-up to vcc1 by internal resistor [typ.10kohm]. f o r w ard and re ver se ro t a t i o n de t e c t figure 5 shows the circuits and function of the forward and reverse rotation detect. the rds is the output signal pin that detected by the signal of hall inputs (hu+,hu-,hv+ and hv-). the rds pin is pulled-up to vcc1 by internal resistor (typ. 10kohm). when the motor is spinning a t forward, the rds pin output will be a low level. when the rotation of motor is reversed at stop mode, it will be a high level. aut o m a t i cal y s t o p a f t e r r eve rse brak- in g figure 5 shows t h e automaticaly stop circuits after the reverse braking, too. figure 6 shows its function table. the mode3 is the input pin in order to be selected either the automaticaly stop o r non-stop. when the mode3 is open, the motor rotation will b e stopped automaticaly after the reverse braking in order to make stop the motor. when the mode3 is connected to gnd, the motor will continue the reversed rotation. this mode [mode3=gnd] i s available for the case that a n user hope t o control the motor stopping at external.
spindle motor driver m 56 755 f p mitsubishi figure 8 shows an example for the reverse torque mode select. the case1 is an controlling example for reverse and commutated short braking. the case2 is an controlling example for reverse and all short braking. mode1 low or open all short braking commutated short braking reverse braking low or open high output open [only inertia] high mode2 fi gur e 7 . fi gur e 8 . 2.5v ec pin input voltage [ecr voltage = 2.5v] ecr reverse and commutated short braking select 3.0v 2.0v 5.0v 0v forward current reverse torque current motor current [ rsense = 0.5 ohm] +1a -1a motor stop mode2 mode1 low low high braking mode commuta- ted short braking reverse braking +600ma -600ma forward current reverse torque current motor current +1a -1a motor stop mode2 mode1 low low high braking mode all short braking reverse braking +600ma -600ma ( vbemf-vd-vsat ) / ra vd ; diode volta g e vsat ; npn transistor saturation volta g e ra ; motor inner resistance 2.5v ec pin input voltage [ecr voltage = 2.5v] ecr 3.0v 2.0v 5.0v 0v case 1 reverse and all short braking select case 2 rev e rs e t o r q u e m o d e s el ect f unct i o n at the 4 times speed and the 6 times speed cdrom drive system, the reverse braking style has been used for the reverse torque. however, at the 8 times speed cdrom drive system,the motor current will be needed above 0.7a, if an user of driver ic require a high speed access time. if the reverse braking is used at 0.7a, the ic junction temperature will be too much high. therefore, mitsubishi new motor driver has the braking mode select function. this mode select function is available in order t o control flexibl y in match with the situation of junction temperature. figure 7 shows the reverse torque mode select function table. if you hope original(the reverse braking) style, please only select reverse braking mode [mode1=low or open and mode2 =high] at external. if it is possible to get two more port from m com, you can flexibly control the four kinds of braking mode. if y o u can only get one more port, you can control only the mode2. then, you can control the two kinds of braking mode [commu- tated short or reverse] under the mode1 is set to low or open.
spindle motor driver m 56 755 f p mitsubishi power dissipation ( pdp) ambient temperature (ta) (?c) 1.0 2.0 3.0 4.0 5.0 4.5 1.2 6.0 0 25 50 75 100 125 150 with infinite heatsink without heatsink t h erm a l d erat i n g 0 200 400 600 800 0 load current (ma) output voltage (v) 10.5 1.0 1.5 11.0 12.0 11.5 0.5 condition (vcc2=vm=12v, vcc=5v) this data is an example for typical sample. output saturation volta g e and load current characteristics 1000 1200 top side saturation voltage bottom side saturation voltage 0.76 0.79 0.86 0.89 0.91 0.98 1.05 1.18 0.07 0.13 0.25 0.38 0.49 0.62 0.76 0.32 condition (vcc2=6v, vm=5v, vcc=5v) output saturation voltage and load current characteristics. (at bootstrap) top side saturation voltage output voltage (v) 1.0 1.5 3.5 4.0 5.0 200 400 600 800 1000 0 0 load current (ma) 4.5 0.5 1200 0.06 0.12 0.23 0.29 0.35 0.47 0.62 0.83 0.07 0.13 0.25 0.38 0.49 0.62 0.76 0.32 bottom side saturation voltage ~ ~ ~ ~ bas i c al l y char act e ri s t i c s ( w ) ~ ~ this device can use this voltage value due to motor drive. if you use a bootstrap as below, it is possible to make low the output saturation voltage. ~ ~ this device can use this voltage value due to motor drive. condition (vcc=4.4v?v) hb terminal voltage (v) 10 20 30 40 0 0 hall current (ma) 0.2 50 0.85 hb terminal voltage and hall current characteristics. 0.4 0.6 0.8 1.0 1.2 1.4 1.6
spindle motor driver m 56 755 f p mitsubishi 7 start/stop app l i cat i o n ci rcui t h v h w hall bias resistance h u control pwm1 5v power suppl y motor current sense resistor 12v motor power supply +- +- t s d vlim 35 36 19 20 21 22 23 24 13 15 16 1 17 33 18 v/i converter i / i converter 14 fg rds 3 2 + 31 sense 32 5 6 4 braking mode change 0 to 1.5 104 104 104 0.5 10uf 10uf 5v 104 reference pwm2 +- 120? matrix 34 hall bias +- m com control brake mode select fg signal forward/reverse rotation signal 78 9 1 0 1 1 1 2 30 25 26 27 28 29
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