TDA5341 datasheet(4/28 Pages) PHILIPS

4 / 28 page

1997 Jul 10

Philips Semiconductors

Product speciﬁcation

Brushless DC motor and VCM drive circuit

with speed control

TDA5341

PINNING

SYMBOL

DESCRIPTION

CAPST

external capacitor for starting oscillator

CAPTI

external capacitor for timer circuit

CLAMP1

external capacitor used to park the heads; must be externally connected to CLAMP2

AMPOUT

uncommitted operational ampliﬁer output

AMPIN

−

uncommitted operational ampliﬁer invert input

AMPIN+

uncommitted operational ampliﬁer direct input

MOT0

motor centre tap input

MOT2

motor driver output 2

FREDENA

friction reduction mode enable input (active HIGH)

frequency generator (tacho) output

BRAKE

brake input command (active LOW)

TESTIN

test input for power output switch-off (active HIGH)

TP1

test purpose 1 (should be left open-circuit)

VEE1

ground for the spindle motor drivers

GAINSEL

VCM gain adjustment input (switch ON when GAINSEL is LOW)

VDD

general power supply

VEE

general ground

CAPCDM

external capacitor for adaptive commutation delay (master)

CAPCDS

external capacitor for adaptive commutation delay (slave)

PRESET

set the motor drivers into a ﬁxed state: MOT1 = F (ﬂoating), MOT2 = L, MOT3 = H

MOT3

motor driver output 3

CAPCPC

frequency compensation of the current control

ILIM

current limit control input

CNTRL

motor control

VDD1

power supply 1 for the spindle motor drivers

CLAMP2

external capacitor used to park the heads; must be externally connected to CLAMP1

CAPCP

external capacitor for the charge pump output

FB1

output of the VCM preampliﬁers

FB2

switchable output of the VCM preampliﬁer

RETRACT

park input command (active LOW)

VEE3

ground 3 for the actuator driver

FILTER

charge pump output to be connected to an external ﬁlter

VCMIN1

VCM voltage control input

VCMIN2

switchable VCM voltage control input

DPULSE

data pulse input of the frequency comparator of the speed control

Vref

voltage reference input

VCM+

positive output of the VCM ampliﬁer

DATA

input data of the serial port (active HIGH)

CLOCK

clock input signal to shift DATA into SERIALIN register (active HIGH)

VDD3

power supply 3 for the actuator driver

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