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| MITSUBISHI M56745FP SPINDLE MOTOR DRIVER DESCRIPTION The M56745FP is a semiconductor integrated circuit designed for a single chip controller for CD-ROM spindle motor. M56745FP has a both (forward and reverse) motor rotation control by the motor speed control terminal. Also, this device includes a bias circuit for Hall Sensor, a current limit circuit and a thermal shut down function. PIN CONFIGURATION (TOP VIEW) S/S 1 2 3 N.C 4 5 36 35 34 33 32 31 30 29 28 GND 27 26 25 24 23 22 21 20 19 HwHw+ HvHv+ HuHu+ W V U Rs Rnf M.GND FEATURES qThe supply voltage with wide range. (4.5V to 13.2V) qHigh motor drive current (1.0A). qMotor current control for the both motor rotation is possible. GND 6 7 8 9 10 11 M56745FP APPLICATION CD-ROM VM CI EC ECR Vcc Hb 12 13 14 15 16 17 18 Outline 36P2R-D N.C: No connection BLOCK DIAGRAM U 34 V 35 W 36 S/S 1 Rs 33 Rnf 32 M.Gnd 31 Vcc 17 VM 13 Vref + - I/I converter 120 MATRIX GND TSD V/I converter Hall + - + - + - Bias 19 Hu+ 20 Hu- 21 Hv+ 22 Hv- 23 Hw+ 24 Hw- 18 Hb 14 CI 15 EC 16 ECR MITSUBISHI M56745FP SPINDLE MOTOR DRIVER PIN FUNCTION Pin No. 1 2 3 4 5 6 7 to 13 14 15 16 17 18 19 20 21 22 23 24 12 25 to 31 32 33 34 35 36 30 Symbol S/S N.C N.C N.C N.C N.C GND VM CI EC ECR Vcc Hb Hu+ HuHv+ HvHw+ HwGND M.GND Rnf Rs U V W Function Start / Stop GND Motor supply voltage Phase Compensation Motor speed control The reference voltage for EC. 5V supply voltage. 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 GND Motor GND. Current feedback amp. input Motor current sense. Motor drive output U Motor drive output V Motor drive output W ABSOLUTE MAXIMUM RATINGS (Ta=25C) Symbol VM Vcc Io VH(c) Pt K Tj Topr Tstg Parameter Motor supply voltage 5V supply voltage Output current Sensor amp. Differential input range Power dissipation Thermal derating Junction temperature Operating temperature Storage temperature 13 17 Conditions pin maximum input voltage pin maximum input voltage 19 to 24 pins Free Air Free Air Ratings 14 7.0 1.0 4.5 1.2 9.6 150 -20 - +75 -40 - +125 Units V V A V W mW/C C C C RECOMMENDED OPERATING CONDITIONS Symbol Vcc VM Io Parameter 5V Power supply Motor Power supply Output drive current Min. 4.5 10.8 Limits Typ. 5.0 12.0 Max. 5.5 13.2 700 Units V V mA MITSUBISHI M56745FP SPINDLE MOTOR DRIVER ELECTRICAL CHARACTERISTICS (Ta=25C, VM=12V, Vcc=5V, unless otherwise noted) Symbol Icc1 Icc2 Vsat ECdeadECdead+ ECR EC Gio Von Voff VH (IN) VH (INH) Vlim VHb IHb Parameter Sleep Mode Supply current-1 Sleep Mode Supply current-2 Saturation voltage Control voltage dead zone Reference voltage input range Control voltage input range Current gain Motor start voltage Motor stop voltage Sensor amp. common mode input range Sensor amp. input signal revel Current limit Hall bias terminal output voltage Hall bias terminal sink current 13 17 Conditions pin Input Current (EC=ECR=2.5V), 14 pin GND. pin Input Current (EC=ECR=2.5V), 14 pin GND. Min. Limits Typ. 0 3.8 1.5 Max. 100 6.0 2.4 -5 +25 2.3 4.0 0.75 1.5 4.5 Unit A mA V mV V V A/V V V V mV A V mA Top and Bottom saturation voltage. Load current 500mA. EC < ECR EC > ECR 16 pin Input voltage range. 15 pin Input voltage range. Rs=0.47 1 pin input voltage when makes the motor start up. 1 pin input voltage when makes the motor stop. 19 to 24 pins input range. 19 to 24 pins input signal revel. Rs=0.47 Load current (IHb) 10mA. -50 +5 1.9 1.0 0.55 3.5 1.2 50 0.45 1.0 -25 +25 2.1 0.65 0.50 1.2 0.55 1.5 10 ELECTRICAL CHARACTERISTICS (Vcc=5V, VM=12V, Ta=25C, Unless otherwise noted) Forward Torque Current limit +5 - +50mV 0.65A/V The relationship between the EC (control voltage), ECR (reference voltage) and the torque is as shown in Figure 1. The current gain is 0.65A/V in the both torques and a dead zone is 5mV to 50mV. + - 0 EC - ECR 0.65A/V -5 - -50mV Current limit Reverse Torque Figure 1. The characteristics of the control voltage and motor current (Torque). MITSUBISHI M56745FP SPINDLE MOTOR DRIVER BASICALLY CHARACTERISTICS Output saturation voltage and Load current characteristics. (Condition Vm=12V, Vcc=5V) 12.0 (V) 0.734 0.792 0.852 0.902 Top side saturation voltage 0.955 11.0 Output voltage 10.0 ~ ~ 2.0 This device can use this voltage value for motor drive. 1.0 0.226 0.320 0.423 0.523 Bottom side saturation voltage 0.127 0 0 100 200 300 Load current 400 500 (mA) THERMAL DERATING 6.0 Power Dissipation (Pdp)(W) 5.0 4.5 With infinite heatsink 4.0 Without heatsink 3.0 2.0 1.2 1.0 0 25 50 75 100 125 150 Ambient temperature (Ta)(C) MITSUBISHI M56745FP SPINDLE MOTOR DRIVER APPLICATION CIRCUIT Motor power supply VM Hall bias resistance GND 13 12V 19 Hu 20 + 34 U Hu+ Hu- - 21 Hv 22 Hv+ Hv- 120 MATRIX V + 35 - 23 Hw 24 + 36 W Hw+ Hw- Hall Bias TSD 18 1 S/S I/I converter Start/Stop 14 CI Motor current sense Control voltage 15 + - EC V/I converter Vref Reference voltage 16 ECR 17 5V Power Supply Rnf M.Gnd 32 31 Rs 33 Vcc |
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