MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER DESCRIPTION The M56786FP is a semiconductor integrated circuit in order to PIN CONFIGURATION (TOP VIEW) drive the spindle motor and 1ch actuator. ECR 14 oO 42] IN- FEATURES EC [2] faa] IN+ @ 3.3V DSP available. @ Low power dissipation & low motor echo noise. Sis [3 40] MUTE @ Large power dissipation package(Power Package). 7 @ High motor drive current . BRS [4] 39] our @ Wide dynamic range. res [5] [38] Vpo+ Motor current control for both motor torque directions. [a 37] Voo- @ Reverse torque mode selact [SHORT BRAKING, etc]. FG @ Sleep mode. vect [7] [36] ouT+ @ FG signal output terminal. @ FG pulse select. & 35 @ Automatic stop. 9 34 @ Low saturation voltage qc z om] @ Wide power supply voltage range(4.5V13.2V) iy 3 33 GND |r] gaa] OND oO 7" I APPLICATION 12 73 31 CD-ROM, DVD,DVD-ROM, DVD-RAM etc. ial 0 oO FI 14 29 HB [15| 2a] Hur [ie a7] v Hu: [t7| 26] W Hve [13] 25) TP Hv- [ig] 24] Ci Hw+ [20] 23] Rs Hw- [21] 22] Vec2 Outline 42P9R-D BLOCK DIAGRAM U Vv w sis y MUTE EC ECR Veci ge ee Ge CURRENT a (2s) SENSE & LIMIT ONTRO v GND Rs (23 6 GND Vec2 WW WW x 1 | + GND , KI BRS MODE too" bo CHANGE Voo- MATRIX SPM CH1 (38) Voo+ BIAS BIAS OUT+ REVERSE oes [seee ' ' ! | | spm Tsp cht ourT- _ FG CH + . + - + - ! FG e oc er te ae | J all | $ } | ee OOO @O-O OO Hut Hu- Hv+ = -Hv- Hwt+ = Hw- HB iN- IN+ TP MB b2498eb OOe27abe 1STMITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER PIN DESCRIPTION Pin No. Symbol Function Pin No. Symbol Function oO ECR The reference voltage for EC @ Vec2 12V supply voltage @ EC Motor speed control Rs Motor current sense S/S Start / Stop for spindle driver & Ci Phase Compensation BRS Reverse torque mode select TP Test Note1 FGS FG pulse select & WwW Motor drive output W FG Frequency generator output & Vv Motor drive output V O Vec1 5V supply voltage U Motor drive output U -@ | GND GND @-@ | GND GND HB Bias for Halt Sensor 6) OUT+ Non-inverted output of actuator driver Hu+ Hu+ Sensor amp. input VDD- GND of actuator driver @ Hu- Hu- Sensor amp. input VDD+ Power supply of actuator driver Hv+ Hv+ Sensor amp. input & OUT- Inverted output of actuator driver Hv- Hv- Sensor amp. input @ MUTE Mute of actuator driver @ Hw+ Hw+ Sensor amp. input IN+ Non-inverted input of actuator driver & Hw- Hw- Sensor amp. input IN- Inverted input of actuator driver *Pull-up resistors (10kohm) are included in the circuits connected to pin[FG]. *Note1. The pin TP is test terminal. Please make an open the pin TP. ABSOLUTE MAXIMUM RATING (Ta=25C) Parameter Conditions Rs Motor Power 2 Power 1 Power 3 SPM Output current Sensor Differential Maximum voltage of input terminals Pt Power Free Air K6@ Thermal Free Air Junction Topr T Storage temperature *Note2 ; The ICs must be operated within the Pt (power dissipation) or the area of safety operation. *Note3 ; The@pin[Tp] is a test terminal. Please make open this terminal. *Note4 ; Please don't connect directly the external power supply to the@},@.@,.8.@,8,0@ pin. RECOMMENDED OPERATING CONDITIONS Limits . Symbol Parameter Min. Typ. Max. Unit Vec1 Power supply 1 4.5 5.0 5.5 Vv Vec2 Power supply 2 45 12.0 13.2 v Vpo+ Power supply 3 45 12.0 13.2 Vv lot SPM Output drive current _ _ 700 mA lo2 ACT Output drive current _ 700 mA ME 624982b 0027363 696ELECTRICAL CHARACTERISTICS MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER (Vec1=5V, Vcc2=12V, VoD+=5V, VoD-=GND, Ta=25C unless otherwise noted.) Symbol! Parameter Conditions Min. = Max. Unit Vcc & Vec2 pin total Current __ _ Isleep Sleep Mode Supply current (at S/S pin, MUTE pin low or open) 10 pA Vect & Vcc2 pin total Current _. lec Supply current (EC=ECR=1.65V) [S/S pin, MUTE pin High] 19 28 | mA Vsat Saturation voltage Top and Bottom saturation voltage.(Load current:500mA) | 1.2 1.9 Vv ECdead- | control voltage dead zone EC<ECR 60 30 0 mV ECdead+ EC>ECR 0 +30 +60 ECR Reference voltage input range_| @ pin(it is possible to input 0 to 5V) 0 1.65 3.3 Vv EC Control voltage Input range @ pin(it is possible to input 0 to 5V) 0 1.65 3.3 Vv Gio Control gain to=Gio/Rsense [A/V] 0.34 0.4 0.46 | VV Viim Control limit llim=Vlim/Rsense [A] 0.27 0.3 0.33 Hall sensor amp . _ VH com | common mode input range @-@ pins 13 voc1-1.3 : Hall sensor amp. . _ VHmin input signal level @-@ pins 60 120 mVp-p) VHb Hall bias terminal output voltage| Load current (IHb)=10mA. 0.6 0.85 1.2 Vv IHb Halt bias terminal sink current _ _ 30 mA {S/S]pin input voltage when it starts up the motor. Von Motor start voltage *The IC is in the active condition. 2.0 _ _ Vv *The hall bias is available. (S/S]pin input voltage when it stops the motor. Voff Motor stop voltage *The IC is in the sleep condition. _ _ 0.8 v *The hail bias is off. , : : BRS input voltage that the short braking is selected _ _ ViH1 BRS input high voltage when the reverse torque. 3.6 Vv ViM BRS input middle voltage reveree tou that the free run is selected when the 16 _ 22 Vv . . BRS input voltage that the reverse braking is selected _ _ Vitt BRS input low voltage when the reverse torque. 0.8 Vv *Note3. The ViM is the limit in case of external voltage input control. The free run mode is selected when the BRS pin is open, too. MM 62498eb 0027364 7eoMITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER ELECTRICAL CHARACTERISTICS (Vec1=5V, Vcc2=12V, Vop+=5V, VDD-=GND, Ta=25C unless otherwise noted.) Limits Conditi i Symbol Parameter inditions Min, Typ. Max Unit . Logic input . an _ __ ViL2 Low voltage [FGS] input voltage when it is LOW. 0.8 Vv [FG] pin - VoL output tow voltage at lo current=1mA 0.5 Vv , Logic input . a: _ _ Vin2 high voltage [FGS] input voltage when it is HIGH. 2.0 Vv ELECTRICAL CHARACTERISTICS (Vcc1=5V, Vec2=12V, Vop+=5V, Vob-=GND, Ta=25C unless otherwise noted.) Limits H P: te Conditions i Symbo arameter Min. Typ. Max Unit : Top and Bottom saturation voltage. _ Vsat2 ACT Saturation voltage Load current 0.5A (bootstrap) 0.7 1.0 Vv Voff2 output offset voltage IN(+)= IN{(-)= 1.65V -47 _ 47 mV Gain Voitage Gain between input and output CINCH ING) 7.2 8.0 88 | VV Vec2 = 12 V 0 _ 8.0 Vv VinIN IN-,IN+ input voltage range Vece2 =5V _ Voo+ =5V 0 30) Vv linIN IN-,IN+ input current IN(+) = IN(-) = 1.65V -2 0 pA Vmute-on | Mute-on voltage Mute-on _ _ 0.8 Vv Vmute-off | Mute-off voltage Mute-off 2.0 _ _ Vv . Mute terminal i Imute Mute terminal input current ( at SY input v dee) _ _ 250 pA THERMAL CHARACTERISTICS (Vcc1=5V, Vcc2=12V, Vop+=5V, Vpp-=GND, Ta=25C unless otherwise noted.) Function start temperature Function stop temperature Symbol Parameter of iC of IC Unit Min. Typ. Max. Min. Typ. Max. TSD Thermal Shut Down _ 165 _ _ 125 _ ct @@ be448eb O0e873SbE5 669MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER THE RELATIONSHIP WITH I/O CONTROL AND THE BRAKING MODE BRS=LOW REVERSE BRAKING The braking mode is selected flexibly by using the BRS terminal. The relationship between the EC-ECR (the difference between Current limit w EC<(controt voltage> and ECR<reference voltage>) and the torque is shown in Figure 1,2 and 3. The current gain is 0.8A/V(at sensing resistor:0.50hm) in forward torque directions, and the dead zone is fromOmV to 60mvV. When the reverse brake mode(BRS=Lo) is selected, the coil current gain under the reverse torque control is the same with in forward torque directions. << Current limit Forward Torque Figure 1. BRS=Hi SHORT BRAKING When the short brake mode(BRS=Hi) is selected, the coil current Reverse Torque under the reverse torque control depends on the back emf. and the coil resistance. Oo 1 {0 EC-ECR in 1 O.BA/V 060mV i ' as <@ Current limit Forward Torque Figure 2. BRS=Open When the free run mode(BRS=open) is selected, the coil current under the reverse torque control (EC-ECR>0) becomes zero and in FREE RUN @ free run situation. 9 EC-ECR ome ee ----- 7-4 <= Current limit Forward Torque Figure 3. M@ b2498eb O0273bb STSMITSUBISHI <CONTROL / DRIVER iC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER THERMAL DERATING 6.0 This [C's package is POWER-SSOP, so improving the board on (Ww) : board which the IC is mounted enables a large power dissipation without a heat sink. 5.0 For example, using an 1 layer glass epoxy resin board, the IC's using I-type board power dissipation is 2.9W at least. And it comes to 4.1W by using an improved 2 layer board. The information of the H, |, J type board is shown in the board information. = o Power Dissipation (Pdp) nN wo oO Qo = So 0 25 50 75 100 125 150 Ambient Temperature Ta (C) MM 6249825 0027367 431MITSUBISHI <CONTROL / DRIVER !IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER HALL AMPLIFIER INPUT AND COMMUTATION The relationship between the halt amplifier inputs voltage and the motor current outputs is shown in Figure 4. Hall elements SOURSE wl) Hall inputs Outer loator REVERSE EC>ECR Output cr : A current | I ; I 1 ' 1 i ! \ SINK U Ww v U Ww FORWARD EC<ECR Figure 4. BRAKING MODE SELECT FUNCTION Braking mode select [BRS} pin It is possible to select three kinds of mode [the reverse braking, the HIGH SHORT BRAKE short braking and the free run] in reverse torque by logic control using the BRS terminal. OPEN FREE RUN Figure 5 shows the function table of the braking mode select. LOW REVERSE BRAKE It is the reverse braking when BRS is LOW, the short braking when BRS is HIGH and the free run when BRS is OPEN. Figure 5. FG FUNCTION FG pulse select (FGSpin) it is possible for user to switch the output pulse numeric by external LOW or OPEN HIGH logic control using FG pulse select terminal [FGS}. Figure 6 shows the FG pulse select function. The FG pin outputs the square pulse signal synchronizing with the NX1 pulse NX3 pulse hall inputs [Hv+ and Hv-] timming when FGS=LOW or OPEN. When FGS=HIGH, it outputs the square pulse signal of 3 times. The FG pin is pulled-up to Vec1 by an internal resistor [typ. 10Kohm]. Figure 6. SLEEP MODE FUNCTION and MUTE FUNCTION Spindle | Actuato BIAS TSD This IC has the S/S terminal (S/S) for ON/OFF of the Spindle motor S/S | MUTE | yi bias [circulT |circuit \circuir | drive and the MUTE terminal (MUTE) for ON/OFF of the actuator drive. H H ON ON ON ON It is possible to control ON / OFF of each circuit (SPM, Actuator) by H L,OPEN ON OFF ON ON external logic inputs. L,OPEN H OFF ON ON ON The figure 7 shows its function. L.OPEN | LOPEN OFF OFE OFF OFF In case of both S/S and MUTE is LOW or OPEN, the bias of all - - circuit becomes OFF[Current is zero]. Figure 7. Therefore, this mode is available in order to reduce the power dissipation when the waiting mode. WM &6249482b 00273b8 378MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER VO CHARACTERISTICS of ACTUATOR DRIVE PART <INPUT> IN+ a 0.2V ee 20K Vrefm Amp. Vop+ VM+ <OUTPUT> VM+ VM- 0.8V 1.65V Vrefm 0. J VM- Nowy 7 NE Vpp- Vrefm= [(Vpo+)+(Voo-)] / 2 ~ Input Buffer Ly Reference 1.65V Vec2 e CH1 power amplifier output terminal equivalent circuit Voot+ (OUT+ OUT-) AA Voo- Figure 8. The power amplifiers of CH1 is shown in Figure 8. The power supplies is Voo+ and Voo-. Generally, the Voo- pin is connected to GND(OV). Also, it is possible to be connected to other power supply larger than 0 volts (ex:5V). The source side of the power amplifier output stage consists of a PNP and a NPN. The emitta of the PNP is connected to Vcc2. So, the power of the PNP supplies can be adjusted externally. MM 6249826 0027369 204 me1/0 terminal Equivalent circuit (1) Hall input amplifier 0 terminal equivalent circuit (Hut, Hu-, Hv+, Hv-, Hw+, Hw-) (FG) ~ ___ (5)BRS input terminal equivalent circuit Vect 10K = 3KS 10KS S=_ i A GND Ks GND _ pi C) (BRS) (7)Spindle driver output stage equivalent circuit MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER (2)IN+, IN-, EC, ECR input terminal equivalent circuit Vec2 GND GND (IN+, IN-) (4)HB output terminal equivalent circuit Vec1 (HB) S GND (6)S/S, MUTE,FGS input terminal equivalent circuit GND >- GND>1 2K 2K 3 d py vec! 4 24K & 24K = q 4q 10K 10K 18K = 18K GND GND M@@ 6249426 0027370 TeoMITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER APPLICATION CIRCUIT cit EC, ECR, IN-, IN+ input application These are the application circuits of input for the EC,ECR, IN- and IN+. REF CTL PWM1 a WV PwM1 mV = REF PWM2 m\V\ PWM2 gp /AA T ae I L *Rhb *The Rh b is a resistor in order to adjust the hall output voltage. 6 8 TO 5V OR 12V POWER SUPPLY di98Z9SW q@ Z o The@ pin (TP) is test terminal ! Please fix as to be + 100-130mV for hall output voltage. Please make an open this terminal ! MM 6249426 0027371 962 mn 144293