MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER DESCRIPTION PIN CONFIGURATION (TOP VIEW) The M56786FP is a semiconductor integrated circuit in order to drive the spindle motor and 1ch actuator. ECR 1 42 IN- EC 2 41 IN+ S/S 3 40 MUTE BRS 4 39 OUT- FGS 5 38 VDD+ FG 6 37 VDD- VCC1 7 36 OUT+ 8 35 9 34 FEATURES 3.3V DSP available. Low power dissipation & low motor echo noise. Large power dissipation package(Power Package). High motor drive current . Wide dynamic range. Motor current control for both motor torque directions. Reverse torque mode select [SHORT BRAKING,etc]. Sleep mode. FG signal output terminal. FG pulse select. Automatic stop. Low saturation voltage Wide power supply voltage range(4.5V-13.2V) M56786FP 10 GND 11 APPLICATION 12 CD-ROM, DVD,DVD-ROM,DVD-RAM etc. 33 32 GND 31 13 30 14 29 HB 15 28 U Hu+ 16 27 V Hu- 17 26 W Hv+ 18 25 TP Hv- 19 24 CI Hw+ 20 23 RS Hw- 21 22 VCC2 Outline 42P9R-D BLOCK DIAGRAM RS 23 VCC2 22 W 28 27 26 MUTE 3 ECR EC 40 1 2 CURRENT SENSE & LIMIT 4 CONTROL BRAKING MODE CHANGE R VDD+ 120 - VDD- REVERSE DETECT VCC2 Sleep spm + - FG & SELECT + - + X8 - VCC2 VCC2 HALL BIAS GND 38 VDD+ 36 OUT+ 39 OUT- 37 VDD- + ch1 5 FGS + - CH1 TSD 6 GND + CH1 BIAS SPM BIAS MATRIX FG 7 GND R BRS VCC1 29 to 35 24 V 8 to 14 CI S/S U B1 B2 16 17 18 19 20 21 15 42 41 25 Hu+ Hu- Hv+ Hv- Hw+ Hw- HB IN- IN+ TP MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER PIN DESCRIPTION Pin No. Function ECR The reference voltage for EC 22 2 EC S/S BRS FGS FG VCC1 GND HB Hu+ HuHv+ HvHw+ Hw- Motor speed control Start / Stop for spindle driver Reverse torque mode select FG pulse select Frequency generator output 5V supply voltage GND Bias for Hall Sensor Hu+ Sensor amp. input Hu- Sensor amp. input Hv+ Sensor amp. input Hv- Sensor amp. input Hw+ Sensor amp. input Hw- Sensor amp. input 23 4 5 6 7 - 14 15 16 17 18 19 20 21 Symbol Pin No. 1 3 8 Symbol 24 25 26 27 28 29 - 36 37 38 39 40 41 42 35 Function VCC2 RS CI 12V supply voltage Motor current sense Phase Compensation TP W V U GND Test Note1 Motor drive output W Motor drive output V Motor drive output U GND OUT+ VDDVDD+ OUTMUTE IN+ IN- Non-inverted output of actuator driver GND of actuator driver Power supply of actuator driver Inverted output of actuator driver Mute of actuator driver Non-inverted input of actuator driver 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) Symbol RS VCC2 VCC1 VDD+ Io1 Io2 VH(c) Parameter Motor supply voltage Power supply 2 voltage Power supply 1 voltage Power supply 3 voltage SPM Output current ATC Output Current Sensor amp. Differential input range Vin Maximum voltage of input terminals Pt K Tj Topr Tstg Power dissipation Thermal derating Junction temperature Operating temperature Storage temperature Conditions 23 pin 22 pin 7 pin 38 pin Note 2 Note 2 16 - 21 pins 1 , 2 , 3 , 4 , 5 , 16 - 21 , 40 pin 23 , 41 , 42 pin Free Air Free Air *Note2 ; The ICs must be operated within the Pt (power dissipation) or the area of safety operation. *Note3 ; The 25 pin[Tp] is a test terminal. Please make open this terminal. *Note4 ; Please don't connect directly the external power supply to the 26 , 27 , 28 , 36 , 39 , 23 , 15 , 6 , 24 pin. RECOMMENDED OPERATING CONDITIONS Symbol VCC1 VCC2 VDD+ Io1 Io2 Parameter Power supply 1 Power supply 2 Power supply 3 SPM Output drive current ACT Output drive current Min. 4.5 4.5 4.5 Limits Typ. 5.0 12.0 12.0 Max. 5.5 13.2 13.2 700 700 Unit V V V mA mA Rating 15 15 7.0 15 1.2 0.7 4.5 0-VCC1 0-VCC2 1.2 9.6 150 -20-+75 -40-+125 Unit V V V V A A V V V W mW/C C C C MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER ELECTRICAL CHARACTERISTICS (VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25C unless otherwise noted.) Symbol Parameter Conditions Isleep Sleep Mode Supply current VCC1 & VCC2 pin total Current (at S/S pin, MUTE pin low or open) Icc Supply current VCC1 & VCC2 pin total Current (EC=ECR=1.65V) [S/S pin, MUTE pin High] Vsat ECdeadECdead+ ECR EC Gio Vlim Saturation voltage Control voltage dead zone Reference voltage Input range Control voltage Input range Control gain Control limit Top and Bottom saturation voltage.(Load current:500mA) EC<ECR EC>ECR 1 pin(it is possible to input 0 to 5V) 2 pin(it is possible to input 0 to 5V) Io=Gio/Rsense [A/V] Ilim=Vlim/Rsense [A] Min. -60 0 0 0 0.34 0.27 Limits Typ. Max. Unit 10 A 19 28 mA 1.2 -30 +30 1.65 1.65 0.4 0.3 1.9 0 +60 3.3 3.3 0.46 0.33 V V V V/V V VCC1-1.3 V VH com Hall sensor amp common mode input range 16 - 21 pins 1.3 VHmin Hall sensor amp. input signal level 23 - 28 pins 60 120 VHb IHb Hall bias terminal output voltage Load current (IHb)=10mA. Hall bias terminal sink current 0.6 0.85 Von Motor start voltage [S/S]pin input voltage when it starts up the motor. *The IC is in the active condition. *The hall bias is available. Voff Motor stop voltage [S/S]pin input voltage when it stops the motor. *The IC is in the sleep condition. *The hall bias is off. ViH1 BRS input high voltage BRS input voltage that the short braking is selected when the reverse torque. 3.6 ViM BRS input middle voltage BRS input voltage that the free run is selected when the reverse torque. 1.6 ViL1 BRS input low voltage BRS input voltage that the reverse braking is selected when the reverse torque. mV mVp-p 1.2 30 V mA V 2.0 0.8 V V 2.2 V 0.8 V *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. MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER ELECTRICAL CHARACTERISTICS (VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25C unless otherwise noted.) Symbol Parameter Conditions Min. Limits Typ. Max. Unit ViL2 Logic input Low voltage [FGS] input voltage when it is LOW. 0.8 V VOL [FG] pin output low voltage at Io current=1mA 0.5 V ViH2 Logic input high voltage [FGS] input voltage when it is HIGH. 2.0 V ELECTRICAL CHARACTERISTICS (VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25C unless otherwise noted.) Symbol Vsat2 ACT Saturation voltage Voff2 output offset voltage Gain Voltage Gain between input and output VinIN IN-,IN+ input voltage range IN-,IN+ input current IinIN Vmute-on Mute-on voltage Vmute-off Mute-off voltage Imute Conditions Parameter Mute terminal input current Limits Typ. Max. 0.7 1.0 V 47 mV 8.8 V/V 0 8.0 V 0 3.0 V -2 0 0.8 A V V 250 A Min. Top and Bottom saturation voltage. Load current 0.5A (bootstrap) IN(+)= IN(-)= 1.65V -47 {OUT(+)-OUT(-)} (IN(+) - IN(-)) VCC2 = 12 V VCC2 = 5 V VDD+ = 5 V 7.2 IN(+) = IN(-) = 1.65V Mute-on Mute-off 8.0 Unit 2.0 Mute terminal input current (at 5V input voltage) THERMAL CHARACTERISTICS (VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25C unless otherwise noted.) Symbol Parameter Function start temperature of IC Min. TSD Thermal Shut Down Typ. 165 Max. Function stop temperature of IC Min. Typ. 125 Unit Max. C MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER THE RELATIONSHIP WITH I/O CONTROL AND THE BRAKING MODE BRS=LOW REVERSE BRAKING Reverse Torque Current limit 0.8A/V 0-+60mV 0 The braking mode is selected flexibly by using the BRS terminal. The relationship between the EC-ECR (the difference between EC<(control 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:0.5ohm) in forward torque directions, and the dead zone is from0mV to 60mV. 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. EC - ECR 0--60mV 0.8A/V Current limit Forward Torque Figure 1. BRS=Hi SHORT BRAKING Reverse Torque 0 When the short brake mode(BRS=Hi) is selected, the coil current under the reverse torque control depends on the back emf. and the coil resistance. EC - ECR 0--60mV 0.8A/V Current limit Forward Torque Figure 2. BRS=Open FREE RUN 0 EC-ECR 0.8A/V 0--60mV Current limit Forward Torque Figure 3. 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 situation. MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER THERMAL DERATING 6.0 (W) 5.0 Power Dissipation (Pdp) This IC's package is POWER-SSOP, so improving the board on which the IC is mounted enables a large power dissipation without a heat sink. For example, using an 1 layer glass epoxy resin board, the IC's 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, I, J type board is shown in the board information. 4.1W using H-type board 3.1W using I-type board 4.0 2.9W using J-type board 3.0 2.0 1.0 0 25 50 75 100 Ambient Temperature Ta (C) 125 150 MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER HALL AMPLIFIER INPUT AND COMMUTATION The relationship between the hall amplifier inputs voltage and the motor current outputs is shown in Figure 4. Hw+ Hv+ Hu+ Hall elements Hall inputs U V V U W Outer loator U V SOURSE W W V V U W Output current U W REVERSE EC>ECR V SINK U V W U W FORWARD EC<ECR Figure 4. BRAKING MODE SELECT FUNCTION It is possible to select three kinds of mode [the reverse braking, the short braking and the free run] in reverse torque by logic control using the BRS terminal. Figure 5 shows the function table of the braking mode select. It is the reverse braking when BRS is LOW, the short braking when BRS is HIGH and the free run when BRS is OPEN. Braking mode select [BRS] pin HIGH SHORT BRAKE OPEN FREE RUN LOW REVERSE BRAKE Figure 5. FG FUNCTION It is possible for user to switch the output pulse numeric by external 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 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 VCC1 by an internal resistor [typ. 10Kohm]. FG pulse select (FGSpin) LOW or OPEN HIGH NX1 pulse NX3 pulse Figure 6. SLEEP MODE FUNCTION and MUTE FUNCTION S/S MUTE HS/S H H L,OPEN L,OPEN H L,OPEN L,OPEN Figure 7. Spindle Hall bias M UON TE ON OFF OFF Actuator BIAS TSD CIRCUIT CIRCUIT CIRCUIT ON OFF ON OFF ON ON ON OFF ON ON ON OFF This IC has the S/S terminal (S/S) for ON/OFF of the Spindle motor drive and the MUTE terminal (MUTE) for ON/OFF of the actuator drive. It is possible to control ON / OFF of each circuit (SPM, Actuator) by external logic inputs. The figure 7 shows its function. In case of both S/S and MUTE is LOW or OPEN, the bias of all circuit becomes OFF[Current is zero]. Therefore, this mode is available in order to reduce the power dissipation when the waiting mode. MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER I/O CHARACTERISTICS of ACTUATOR DRIVE PART <INPUT> 20K + IN+ Vrefm Vrefm Amp. 20K 1.65V 6K + 6K 6K IN- 0.2V 24K VDD+ VM+ <OUTPUT> VM+ 24K 24K VM- 0.8V 1.65V Vrefm + 6K IN+ VM- 0.8V VDD- 24K Vrefm= [(VDD+)+(VDD-)] / 2 Input Buffer Gain=x8 Reference 1.65V VCC2 CH1 power amplifier output terminal equivalent circuit VDD+ (OUT+ OUT-) GND VDD- Figure 8. The power amplifiers of CH1 is shown in Figure 8. The power supplies is VDD+ and VDD-. Generally, the VDD- pin is connected to GND(0V). 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. MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER I/O terminal Equivalent circuit (2)IN+, IN-, EC, ECR input terminal equivalent circuit (1) Hall input amplifier I/O terminal equivalent circuit VCC1 (Hu+, Hu-, Hv+, Hv-, Hw+, Hw-) VCC2 VCC2 VCC1 2K 2K 2K GND GND GND GND GND GND (EC,ECR) (3)FG output terminal equivalent circuit (IN+, IN-) (4)HB output terminal equivalent circuit VCC1 VCC1 10K (HB) (FG) GND (6)S/S, MUTE,FGS input terminal equivalent circuit (5)BRS input terminal equivalent circuit VCC1 (FGS) (S/S, MUTE) GND GND 2K 2K VCC1 VCC1 10K 24K 24K 10K 3K 10K 10K GND VCC1 18K 18K 2K GND GND GND (BRS) (7)Spindle driver output stage equivalent circuit VCC2 RS U V W GND MITSUBISHI <CONTROL / DRIVER IC> M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER APPLICATION CIRCUIT EC, ECR, IN-, IN+ input application CTL These are the application circuits of input for the EC,ECR, IN- and IN+. REF CTL PWM1 PWM1 REF PWM2 PWM2 ECR IN- 42 2 EC IN+ 41 3 S/S MUTE 40 4 BRS OUT- 39 5 FGS VDD+ 38 6 FG VDD- 37 7 VCC1 OUT+ 36 M 1 35 9 34 10uF 10 11 GND 12 *Rh b Hw Hv M56786FP 5V 8 33 GND 104 31 30 14 29 15 HB U 28 16 Hu+ V 27 17 Hu- W 26 18 Hv+ TP 25 19 Hv- CI 24 20 Hw+ RS 23 21 Hw- VCC2 22 *The Rh b is a resistor in order to adjust the hall output voltage. Please fix as to be 100-130mV for hall output voltage. 104 32 13 Hu TO 5V OR 12V POWER SUPPLY *note 104 0.5 12V 10uF The 25 pin (TP) is test terminal ! Please make an open this terminal ! 104