TDA5145 datasheet(5/24 Pages) PHILIPS

5 / 24 page

June 1994

Philips Semiconductors

Product speciﬁcation

Brushless DC motor drive circuit

TDA5145

Fig.2 Pin configuration.

FUNCTIONAL DESCRIPTION

The TDA5145 offers a sensorless three phase motor drive

function. It is unique in its combination of sensorless motor

drive and full-wave drive. The TDA5145 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

TDA5145 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.

• Accurate frequency generator (FG) by using the

motor EMF.

• Direction of rotation controlled by one pin.

• Uncommitted operational transconductance amplifier

(OTA), with a high output current, for use as a control

amplifier.

• Brake function.

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

supply voltage

−

input voltage; all pins except

VMOT

VI < 18 V

−0.3

VP + 0.5

VVMOT

VMOT input voltage

−0.5

output voltage

AMP OUT and FG

GND

MOT0, MOT1, MOT2 and MOT3

−1V

VMOT + VDHF

input voltage CAP-ST, CAP-TI,

CAP-CD and CAP-DC

−

2.5

Tstg

storage temperature

−55

+150

°C

Tamb

operating ambient temperature

+70

°C

Ptot

total power dissipation

see Figs 3 and 4

−−

Ves

electrostatic handling

see Chapter “Handling”

−

2000

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