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| MITSUBISHI M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER DESCRIPTION The M56786FP is a semiconductor integrated circuit in order to drive the spindle motor and 1ch actuator. PIN CONFIGURATION (TOP VIEW) ECR 1 2 3 4 5 6 7 8 9 42 41 40 39 38 37 36 35 34 ININ+ MUTE OUTVDD+ VDDOUT+ FEATURES q q q q q q q q q q q q q 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) EC S/S BRS FGS FG VCC1 M56786FP 10 GND 11 12 13 14 HB Hu+ HuHv+ HvHw+ Hw15 16 17 18 19 20 21 33 32 31 30 29 28 27 26 25 24 23 22 U V W TP CI RS VCC2 GND APPLICATION CD-ROM, DVD,DVD-ROM,DVD-RAM etc. Outline 42P9R-D BLOCK DIAGRAM U 28 CI 24 CURRENT SENSE & LIMIT GND V 27 W 26 S/S 3 40 MUTE EC 2 ECR 1 VCC1 7 8 to 14 CONTROL GND RS VCC2 23 22 29 to 35 R 4 BRS BRAKING MODE CHANGE R VDD+ GND 120 MATRIX SPM BIAS Sleep CH1 BIAS VDD- - + VCC2 + + X8 VCC2 B2 41 IN+ 25 TP 39 37 38 VDD+ REVERSE DETECT spm 36 OUT+ CH1 ch1 TSD 6 FG FG & SELECT 5 FGS 16 Hu+ 17 Hu18 Hv+ 19 Hv20 Hw+ 21 Hw15 HB + + + - OUTVDD- VCC2 HALL BIAS B1 42 IN- MITSUBISHI M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER PIN DESCRIPTION Pin No. 1 2 3 4 5 6 7 8 Symbol ECR EC S/S BRS FGS FG VCC1 GND HB Hu+ HuHv+ HvHw+ Hw- Function The reference voltage for EC 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 Pin No. 22 23 24 25 26 27 28 29 Symbol VCC2 RS CI TP W V U GND OUT+ VDDVDD+ OUTMUTE IN+ IN- Function 12V supply voltage Motor current sense Phase Compensation Test Note1 Motor drive output W Motor drive output V Motor drive output U GND 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 - 15 16 17 18 19 20 21 14 - 36 37 38 39 40 41 42 35 *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) Vin Pt K Tj Topr Tstg 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 Maximum voltage of input terminals 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 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 *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 MITSUBISHI M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER ELECTRICAL CHARACTERISTICS (VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25C unless otherwise noted.) Symbol Isleep Icc Vsat ECdeadECdead+ ECR EC Gio Vlim VH com VHmin VHb IHb Von Parameter Sleep Mode Supply current Supply current Saturation voltage Control voltage dead zone 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 Conditions VCC1 & VCC2 pin total Current (at S/S pin, MUTE pin low or open) VCC1 & VCC2 pin total Current (EC=ECR=1.65V) [S/S pin, MUTE pin High] Top and Bottom saturation voltage.(Load current:500mA) EC 16 Min. Limits Typ. Max. 10 Unit A mA V mV V V V/V V V mVp-p 19 1.2 -30 +30 1.65 1.65 0.4 0.3 28 1.9 0 +60 3.3 3.3 0.46 0.33 VCC1-1.3 -60 0 0 0 0.34 0.27 1.3 60 0.6 - 21 pins - 28 pins 23 120 0.85 1.2 30 Hall bias terminal output voltage Load current (IHb)=10mA. Hall bias terminal sink current 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. [S/S]pin input voltage when it stops the motor. *The IC is in the sleep condition. *The hall bias is off. BRS input voltage that the short braking is selected when the reverse torque. BRS input voltage that the free run is selected when the reverse torque. BRS input voltage that the reverse braking is selected when the reverse torque. V mA V 2.0 Voff Motor stop voltage 0.8 V ViH1 ViM ViL1 BRS input high voltage BRS input middle voltage BRS input low voltage 3.6 1.6 2.2 0.8 V V 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 M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER ELECTRICAL CHARACTERISTICS (VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25C unless otherwise noted.) Symbol ViL2 VOL ViH2 Parameter Logic input Low voltage [FG] pin output low voltage Logic input high voltage Conditions [FGS] input voltage when it is LOW. at Io current=1mA [FGS] input voltage when it is HIGH. 2.0 Min. Limits Typ. Max. 0.8 0.5 Unit V V V ELECTRICAL CHARACTERISTICS (VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25C unless otherwise noted.) Symbol Vsat2 Voff2 Gain Parameter ACT Saturation voltage output offset voltage Voltage Gain between input and output Conditions Top and Bottom saturation voltage. Load current 0.5A (bootstrap) IN(+)= IN(-)= 1.65V {OUT(+)-OUT(-)} (IN(+) - IN(-)) VCC2 = 12 V VCC2 = 5 V VDD+ = 5 V IN(+) = IN(-) = 1.65V Mute-on Mute-off Mute terminal input current (at 5V input voltage) Min. Limits Typ. 0.7 -47 7.2 0 0 -2 2.0 250 8.0 Max. 1.0 47 8.8 8.0 3.0 0 0.8 Unit V mV V/V V V A V V A VinIN IN-,IN+ input voltage range IN-,IN+ input current IinIN Vmute-on Mute-on voltage Vmute-off Mute-off voltage Imute Mute terminal input current THERMAL CHARACTERISTICS (VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25C unless otherwise noted.) Symbol TSD Parameter Thermal Shut Down Function start temperature of IC Min. Typ. 165 Max. Function stop temperature of IC Min. Typ. 125 Max. C Unit MITSUBISHI M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER THE RELATIONSHIP WITH I/O CONTROL AND THE BRAKING MODE BRS=LOW Current limit REVERSE BRAKING Reverse Torque 0-+60mV 0.8A/V 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 0 EC - ECR 0.8A/V 0--60mV Current limit Forward Torque Figure 1. BRS=Hi SHORT BRAKING Reverse Torque 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. 0 EC - ECR 0.8A/V 0--60mV Current limit Forward Torque Figure 2. BRS=Open FREE RUN 0 EC-ECR 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. 0.8A/V 0--60mV Current limit Forward Torque Figure 3. MITSUBISHI M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER THERMAL DERATING 6.0 (W) 5.0 Power Dissipation (Pdp) 4.0 2.9W using J-type board 3.0 4.1W using H-type board 3.1W using I-type board 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. 2.0 1.0 0 25 50 75 100 Ambient Temperature Ta (C) 125 150 MITSUBISHI 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+ Hall inputs V U W V Hv+ Hu+ Hall elements V U W V U U W V U Outer loator SOURSE Output current SINK U W W V W REVERSE EC>ECR V U W FORWARD EC BRAKING MODE SELECT FUNCTION Braking mode select [BRS] pin HIGH SHORT BRAKE OPEN FREE RUN LOW REVERSE BRAKE Figure 5. 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. FG FUNCTION FG pulse select (FGSpin) LOW or OPEN HIGH NX1 pulse NX3 pulse 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]. Figure 6. SLEEP MODE FUNCTION and MUTE FUNCTION S/S H H L,OPEN L,OPEN Figure 7. MUTE H L,OPEN H L,OPEN S/S M UTE ON ON OFF OFF Spindle Hall bias 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 M56786FP SPINDLE MOTOR AND 1CH ACTUATOR DRIVER I/O CHARACTERISTICS of ACTUATOR DRIVE PART 20K 20K 6K 24K + Vrefm Vrefm Amp. 1.65V 0.2V IN+ + IN1.65V 6K 6K 24K 24K VDD+ VM+ |
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