M56784FP Datasheet Text
MITSUBISHI <CONTROL / DRIVER IC>
M56784FP
SPINDLE MOTOR DRIVER
DESCRIPTION
The M56784FP is a semiconductor integrated circuit in order to drive the spindle motor.
PIN CONFIGURATION (TOP VIEW)
N.C W V U RS MODE3 MODE4
1 2 3 4 5 6 7 8 9
42 41 40 39 38 37 36 35 34
N.C S/S RDS FG CI MODE2 MODE1
Features q Large power dissipation (Power Package). q 3.3V DSP available. q The supply voltage with wide range. q High motor drive current. q Low saturation voltage. (typical 1.2V at load current 500mA) q Motor current control for both motor torque directions. q Reverse torque mode select [SHORT BRAKING, etc]. q Sleep mode. (Zero total current) q Hall amplifier sensitivity select. (Minimum voltage: 35mVp-p or 50mVp-p) q FG signal output terminal. q Automatic stop select. (Removable function) q Reverse detected signal pin.
M56784FP
10
GND
33 32 31 30 29 28 27 26 25 24 23 22
VM VCC2 EC ECR VCC1 HB N.C GND
11 12 13 14
APPLICATION
CD-ROM, DVD, DVD-ROM, DVD-RAM etc.
HwHw+ HvHv+ HuHu+ N.C
15 16 17 18 19 20 21
Outline 42P9R-D
N.C: no connection
BLOCK DIAGRAM
U 4 V 3 W 2 S/S 41 RS 5 VCC1 24
VM VCC2
28 27 ++ Vref 8 to 14
MODE1
36
MODE2...