MITSUBISHI <CONTROL / DRIVER IC> M56745FP SPINDLE MOTOR DRIVER DESCRIPTION PIN CONFIGURATION (TOP VIEW) The M56745FP is a semiconductor integrated circuit designed for a single chip controller for CD-ROM spindle motor. S/S 1 36 W 2 35 V 3 34 U 4 33 Rs 5 32 Rnf FEATURES 6 31 M.GND ●The supply voltage with wide range. 7 30 8 29 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 N.C limit circuit and a thermal shut down function. ●High motor drive current (1.0A). M56745FP (4.5V to 13.2V) 9 GND ●Motor current control for the both motor rotation is possible. 10 APPLICATION CD-ROM 28 GND 27 11 26 12 25 VM 13 24 Hw- CI 14 23 Hw+ EC 15 22 Hv- ECR 16 21 Hv+ Vcc 17 20 Hu- Hb 18 19 Hu+ Outline 36P2R-D N.C: No connection BLOCK DIAGRAM U V W S/S Rs Rnf M.Gnd Vcc 34 35 36 1 33 32 31 17 VM 13 Vref + - I/I converter GND 120˚ MATRIX TSD V/I converter Hall + - + - + - Bias 19 20 21 22 23 24 18 14 15 16 Hu+ Hu- Hv+ Hv- Hw+ Hw- Hb CI EC ECR MITSUBISHI <CONTROL / DRIVER IC> M56745FP SPINDLE MOTOR DRIVER PIN FUNCTION Pin No. 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 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=25˚C) Symbol VM Vcc Io VH(c) Pt Kθ 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 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 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 MITSUBISHI <CONTROL / DRIVER IC> M56745FP SPINDLE MOTOR DRIVER ELECTRICAL CHARACTERISTICS (Ta=25˚C, VM=12V, Vcc=5V, unless otherwise noted) Symbol Parameter Conditions Icc1 Icc2 Sleep Mode Supply current-1 Sleep Mode Supply current-2 Vsat Saturation voltage ECdeadECdead+ ECR EC Gio Von Voff VH (IN) VH (INH) Vlim VHb IHb 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 Min. pin Input Current (EC=ECR=2.5V), 14 pin GND. pin Input Current (EC=ECR=2.5V), 14 pin GND. Top and Bottom saturation voltage. Load current 500mA. EC < ECR EC > ECR 16 pin Input voltage range. 15 pin Input voltage range. Rs=0.47Ω 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=0.47Ω Load current (IHb) 10mA. -50 +5 1.9 1.0 0.55 3.5 1.2 50 0.45 1.0 Limits Typ. 0 3.8 Max. 100 6.0 1.5 2.4 -25 +25 2.1 -5 +25 2.3 4.0 0.75 0.65 1.5 4.5 0.50 1.2 0.55 1.5 10 ELECTRICAL CHARACTERISTICS (Vcc=5V, VM=12V, Ta=25˚C, Unless otherwise noted) Forward Torque 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. Current limit 0.65A/V +5 – +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). Unit µA mA V mV V V A/V V V V mV A V mA MITSUBISHI <CONTROL / DRIVER IC> 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 Output voltage 11.0 10.0 ~ ~ This device can use this voltage value for motor drive. 2.0 1.0 0.226 0.127 0 0 0.320 200 300 Load current THERMAL DERATING Power Dissipation (Pdp)(W) 6.0 With infinite heatsink 4.5 4.0 Without heatsink 3.0 2.0 1.2 1.0 0 25 50 0.523 Bottom side saturation voltage 100 5.0 0.423 75 100 125 Ambient temperature (Ta)(˚C) 150 400 500 (mA) MITSUBISHI <CONTROL / DRIVER IC> M56745FP SPINDLE MOTOR DRIVER APPLICATION CIRCUIT Motor power supply 12V VM Hall bias resistance GND Hu+ + 19 Hu 13 34 V 35 Hv- Hw+ 36 W - 24 120˚ MATRIX + 23 Hw Hv+ - 22 Hu- + 21 Hv U - 20 HwHall Bias 18 TSD 1 Start/Stop S/S 14 I/I converter CI Motor current sense – 15 Rnf Vref 16 Rs EC V/I converter Reference voltage + Control voltage 33 M.Gnd 32 31 ECR Vcc 17 5V Power Supply