1998 Oct 27

4

Philips Semiconductors

Product specification

Brushless DC motor drive circuit

TDA5145TS

PINNING

SYMBOL

PIN

DESCRIPTION

MOT1

1

driver output 1

MOT1

2

driver output 1

TEST

3

test input/output

MOT2

4

driver output 2

MOT2

5

driver output 2

VMOT

6

input voltage for the output driver

stages

VMOT

7

input voltage for the output driver

stages

BRAKE

8

brake input; this pin may not be left

floating, a LOW-level voltage must

be applied to disable this function

DIR

9

direction control input; this pin may

not be left floating

GND2

10

ground supply return for control

circuits

11

supply voltage

CAP-CD

12

external capacitor connection for

adaptive communication delay

timing

CAP-DC

13

external capacitor connection for

adaptive communication delay

timing copy

CAP-ST

14

external capacitor connection for

start-up oscillator

CAP-TI

15

external capacitor connection for

timing

n.c.

16

not connected

n.c.

17

not connected

RESET

18

reset input; this pin may not be left

floating, a LOW-level voltage must

be applied to disable this function

n.c.

19

not connected

MOT3

20

driver output 3

MOT3

21

driver output 3

MOT0

22

input from the star point of the motor

coils

GND1

23

ground (0 V) motor supply return for

output stages

GND1

24

ground (0 V) motor supply return for

output stages

FUNCTIONAL DESCRIPTION

The TDA5145TS offers a sensorless 3-phase motor drive

function. It is unique in its combination of sensorless motor

drive and full-wave drive. The TDA5145TS offers

protected outputs capable of handling high currents and

can be used with star or delta connected motors. It can

easily be adapted for different motors and applications.

The TDA5145TS offers the following features:

• Sensorless commutation by using the motor EMF

• Built-in start-up circuit

• Optimum commutation, independent of motor type or

motor loading

• Built-in flyback diodes

• Three phase full-wave drive

• High output current (2.0 A)

• Outputs protected by current limiting and thermal

protection of each output transistor

• Low current consumption by adaptive base-drive

• Soft-switching pulse output for low radiation

• Direction of rotation controlled by one pin

• Brake function.

Fig.2 Pin configuration.

handbook, halfpage

MOT1

MOT1

TEST

MOT2

MOT2

VMOT

VMOT

BRAKE

DIR

GND2

VP

CAP-CD

GND1

GND1

MOT0

MOT3

n.c.

RESET

MOT3

n.c.

n.c.

CAP-TI

CAP-ST

CAP-DC

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

TDA5145TS

MGR392