TDF5242 datasheet(4/20 Pages) PHILIPS

4 / 20 page

1997 Sep 12

Philips Semiconductors

Preliminary speciﬁcation

Brushless DC motor drive circuit

TDF5242T

PINNING

SYMBOL

DESCRIPTION

OUT-NB

driver output B for driving the

n-channel power FET or power NPN

OUT-PB

driver output B for driving the

p-channel power FET or power PNP

GND1

ground (0 V) motor supply return for

output stages

OUT-PC

driver output C for driving the

p-channel power FET or power PNP

OUT-NC

driver output C for driving the

n-channel power FET or power NPN

VMOT

input voltage for the output driver

stages

DIR

direction input command

TEST

test input/output

BRAKE

brake input

frequency generator: output of the

rotation speed detector stage

GND2

ground supply return for control

circuits

n.c.

not connected

supply voltage

CAP-CD

external capacitor connection for

adaptive communication delay timing

CAP-DC

external capacitor connection for

adaptive communication delay

timing copy

CAP-ST

external capacitor connection for

start-up oscillator

n.c.

not connected

CAP-TI

external capacitor connection for

timing

+AMP IN

non-inverting input of the

transconductance ampliﬁer

−AMP IN

inverting input of the

transconductance ampliﬁer

AMP OUT

transconductance ampliﬁer output

(open collector)

COMP-A

comparator input corresponding to

output A

COMP-B

comparator input corresponding to

output B

COMP-C

comparator input corresponding to

output C

n.c.

not connected

MOT0

input from the star point of the motor

coils

OUT-NA

driver output A for driving the

n-channel power FET or power NPN

OUT-PA

driver output A for driving the

p-channel power FET or power PNP

SYMBOL

DESCRIPTION

Fig.2 Pin configuration.

handbook, halfpage

OUT-NB

OUT-PB

GND1

OUT-PC

OUT-NC

VMOT

DIR

TEST

BRAKE

GND2

n.c.

CAP-CD

OUT-PA

OUT-NA

MOT0

n.c.

COMP-B

COMP-A

COMP-C

AMP OUT

−AMP IN

+AMP IN

CAP-TI

n.c.

CAP-ST

CAP-DC

TDA5242T

MGG987

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