April 1994

6

Philips Semiconductors

Product specification

Brushless DC motor drive circuit

TDA5141

FUNCTIONAL DESCRIPTION

The TDA5141 offers a sensorless three phase motor drive function. It is unique in its combination of sensorless motor

drive and full-wave drive. The TDA5141 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 TDA5141 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 (1.9 A).

• Outputs protected by current limiting and thermal protection of each output transistor.

• Low current consumption by adaptive base-drive.

• Accurate frequency generator (FG) by using the motor EMF.

• Amplifier for external position generator (PG) signal.

• Suitable for use with a wide tolerance, external PG sensor.

• Built-in multiplexer that combines the internal FG and external PG signals on one pin for easy use with a controlling

microprocessor.

• Uncommitted operational transconductance amplifier (OTA), with a high output current, for use as a control amplifier.

LIMITING VALUES

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

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

supply voltage

−

18

V

input voltage; all pins except

VMOT

−0.3

V

VMOT input voltage

−0.5

17

V

output voltage

AMP OUT and PG/FG

GND

V

MOT1, MOT2 and MOT3

input voltage CAP-ST, CAP-TI,

CAP-CD and CAP-DC

−

2.5

V

storage temperature

−55

+150

°C

operating ambient temperature

0

+70

°C

total power dissipation

see Figs 5 to 7

−−

W

electrostatic handling

see Chapter “Handling”

−

500

V