M56755AFP Datasheet - SPINDLE MOTOR DRIVER

MITSUBISHI M56755AFP SPINDLE MOTOR DRIVER DESCRIPTION The M56755AFP is a semiconductor integrate...

MITSUBISHI M56755AFP SPINDLE MOTOR DRIVER DESCRIPTION The M56755AFP is a semiconductor integrated circuit designed for a single chip controller for CD-ROM spindle motor. M56755AFP has a both (forward and reverse) motor torque control by the motor speed control terminal. M56755AFP 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. PIN CONFIGURATION (TOP VIEW) S/S RDS FG CI MODE2 MODE1 1 2 3 4 5 6 7 8 9 36 35 34 33 32 31 30 29 28 W V U RS MODE3 MODE4 FEATURES q 3.3V DSP available. q The supply voltage with wide range. (4.5V to 13.2V) q High motor drive current (1.2A). q Motor current control for the both motor torque is possible. q Reverse torque mode select [SHORT BRAKING, etc] q Sleep mode q Hall amplifier sensitivity select q Automatic stop select (with reverse detected signal pin) M56755AFP GND 10 11 12 VM VCC2 EC ECR VCC1 HB 13 14 15 16 17 18 GND 27 26 25 24 23 22 21 20 19 HwHw+ HvHv+ HuHu+ APPLICATION Above 8 times speed CD-ROM, DVD, DVD-ROM etc. Outline 36P2R-D BLOCK DIAGRAM U 34 V 35 W 36 S/S 1 RS 33 VCC1 17 VM VCC2 13 14 ++ I/I Converter 120° MATRIX Vref 7 to 12 GND MODE1 6 MODE2 5 BRAKING MODE CHANGE 25 to 30 GND MODE4 31 SENSE TSD MODE3 FG RDS 32 3 2 19 Hu+ 20 Hu21 Hv+ 22 Hv23 Hw+ 24 Hw18 HB CI 4 FG RDS + + + Hall Bias V/I Converter 15 EC 16 ECR MI...