M56755FP Mitsubishi, M56755FP Datasheet
M56755FP
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M56755FP Summary of contents
Page 1
... M56755FP has a both (forward and reverse) motor torque control by the motor speed control terminal. M56755FP has the several braking mode that an user can flexibly select in order to generate the reverse torque. Also, this device includes a bias circuit for Hall Sensor, a current limit circuit and a thermal shut down function ...
Page 2
... Note1 ; There is no overing Pt (power dissipation) or the area of safety operation * MITSUBISHI <CONTROL / DRIVER IC> Function Conditions pin maximum input voltage 13 pin maximum input voltage 14 pin maximum input voltage 17 *Note 1 to pins 19 24 Free Air Free Air M56755FP SPINDLE MOTOR DRIVER Rating Unit 7.0 A 1.5 4.5 V 1.2 W 9.6 mW/˚C 150 ˚ ...
Page 3
... Io current = 1mA M56755FP SPINDLE MOTOR DRIVER Limits Unit Min. Typ. Max 100 500 A 6.0 mA pin Hi] 1 ...
Page 4
... EC - ECR -5 – -50mV Current limit MITSUBISHI <CONTROL / DRIVER IC> M56755FP SPINDLE MOTOR DRIVER The relationship between the EC (control voltage), ECR (reference voltage) and the torque is as shown in Figure 1. The current gain is 4.6A/V (at sensing resistor : 0.5ohm) in the both torques and a dead zone is ...
Page 5
... IC bias current wil be a slight current (please make reference the electrical characteristics). At the same time, the hall bias output will be cut off. When the 1pin goes high, the all of circuits will be available. MITSUBISHI <CONTROL / DRIVER IC> M56755FP SPINDLE MOTOR DRIVER U V Outer loator ...
Page 6
... The FG pin is pulled-up to VCC1 by internal resistor [typ.10Kohm]. OPEN or HIGH AUTOMATIC STOP Figure 6. FG VCC1 Hu+ Hu- Hv+ Hv- Hw+ Hw- FG-amp + - EC-ECR Hu+ Hw+ Hv+ REVERSE Comparator Hysteresis High RDS Low High FG Low MITSUBISHI <CONTROL / DRIVER IC> M56755FP SPINDLE MOTOR DRIVER MODE3 GND UN-AUTOMATIC (NON-STOP) Hall sensor-amp Hw+ Hu+ Hv+ ...
Page 7
... FORWARD CURRENT REVERSE TORQUE MOTOR CURRENT STOP -1A MITSUBISHI <CONTROL / DRIVER IC> M56755FP SPINDLE MOTOR DRIVER Figure 8 shows an example for the reverse torque mode select. The CASE1 is an controlling example for REVERSE and COMMUTATED SHORT BRAKING. The CASE2 is an controlling example for REVERSE and ALL SHORT BRAKING ...
Page 8
... HB terminal voltage and Hall current characteristics. Top side 0.47 saturation 0.62 voltage 0.83 0.62 0.76 0.49 Bottom side saturation voltage 800 1000 1200 MITSUBISHI <CONTROL / DRIVER IC> M56755FP SPINDLE MOTOR DRIVER Condition (Vcc2=Vm=12V, Vcc=5V) 0.76 0.79 0.86 0.89 0.91 0.98 1. This device can use this voltage value ~ ~ due to motor drive. 1.5 1.0 0.62 0.49 0.38 0.5 0.25 0.07 0.13 ...
Page 9
... Reference PWM2 com control Brake mode FG select signal MITSUBISHI <CONTROL / DRIVER IC> M56755FP SPINDLE MOTOR DRIVER 12V Motor power supply 0 to 1.5 10uF 104 35 36 104 Start/Stop 1 - Motor current sense resistor 33 0 10uF 104 5V ...