PIN DESCRIPTION

Power supply voltage for drump motor

Power supply voltage for capstan motor

Power supply voltage for loading motor and charge pump

Logic voltage supply

Logic Ground

GND R

Capstan + drum power ground

GND L

Loading + Charge pump Power ground

Analog voltage supply

Analog ground

DRUM MOTOR

Winding Output U

Winding Output V

Winding Output W

PWM logic pulse input. Control signal generated by

µP for dump motor current regulation.

Logic output position feedback generated by the translator logic

OD

Optocoupler diode output

OC

External capacitor for tacho-converter integrator

OT

Input for optocoupler transistor

OR

Tacho-converter external resistor. This resistor defines the full-light current level of the tacho.

CAPSTAN MOTOR

Winding Output U

Winding Output V

Winding Output W

PWM logic pulse input. Control signal generated by

µP for current regulation.

Motor Direction Logic Input Signal

H1+

Hall sensor differential input

H1-

H2+

Hall sensor differential input

H2-

H3+

Hall sensor differential input

H3-

LOADING MOTOR

Winding Output A

Winding Output B

PWM logic input.

Direction logic input

SERVICES

HEATER

Open drain output for heater resistor

Charge pump storage capacitor pin

CP1

Bootstrap Capacitor pin

CP2

Bootstrap Capacitor pin

THERM

Open drain thermal alarm output

Start-up logic signal for drum motor

CTO

Time out capacitor output

L6287

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