June 1994

4

Philips Semiconductors

Product specification

Brushless DC motor drive circuit

TDA5145

PINNING

Note

1. Pin numbers for both DIL and SOL packages are identical.

SYMBOL

DESCRIPTION

MOT1

1 and 2

driver output 1

TEST

3

test input/output

n.c.

4

not connected

MOT2

5 and 6

driver output 2

VMOT

7 and 8

input voltage for the output driver stages

BRAKE

9

brake input; this pin may not be left floating, a LOW level voltage must be applied to disable

this function

DIR

10

direction control input; this pin may not be left floating

FG

11

frequency generator: output of the rotation speed (open collector digital output)

GND2

12

ground supply return for control circuits

13

supply voltage

CAP-CD

14

external capacitor connection for adaptive communication delay timing

CAP-DC

15

external capacitor connection for adaptive communication delay timing copy

CAP-ST

16

external capacitor connection for start-up oscillator

CAP-TI

17

external capacitor connection for timing

+AMP IN

18

non-inverting input of the transconductance amplifier

−AMP IN

19

inverting input of the transconductance amplifier

n.c.

20

not connected

RESET

21

reset input; this pin may not be left floating, a LOW level voltage must be applied to disable

this function

AMP OUT

22

transconductance amplifier output (open collector)

MOT3

23 and 24 driver output 3

n.c.

25

not connected

MOT0

26

input from the star point of the motor coils

GND1

27 and 28 ground (0 V) motor supply return for output stages