Philips TDF5140A Datasheet

INTEGRATED CIRCUITS

TDF5140A

Brushless DC motor drive circuit

Product specification 1999 March 15

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Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDF5140A

FEATURES

• Full-wave commutation (using push/pull drivers at the output stages) without position sensors

• Built-in start-up circuitry

• Three push-pull outputs:

– 0.8 A output current (typ.)

APPLICATIONS

• VCR

• Laser beam printer

• Fax machine

• Blower

• Automotive.

– low saturation voltage – built-in current limiter

• Thermal protection

• Flyback diodes

• Tacho output without extra sensor

• Position pulse stage for phase-locked-loop control

GENERAL DESCRIPTION

The TDF5140A is a bipolar integrated circuit used to drive 3-phase brushless DC motors in full-wave mode. The device is sensorless (saving of 3 hall-sensors) using the back-EMF sensing technique to sense the rotor position.

• Transconductance amplifier for an external control transistor.

QUICK REFERENCE DATA Measured over full voltage and temperature range.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V V

P VMOT

supply voltage note 1 4 − 18 V input voltage to the output

note 2 1.7 − 20 V

driver stages V I

LIM

drop-out output voltage IO = 100 mA − 0.93 1.05 V

current limiting V

= 10 V; RO= 3.9 Ω 0.7 0.8 1 A

VMOT

Notes

1. An unstabilized supply can be used.

2. V

= VP; +AMP IN = −AMP IN = 0 V; all outputs IO = 0 mA.

VMOT

ORDERING INFORMATION

PACKAGE

EXTENDED TYPE NUMBER

PINS PIN POSITION MATERIAL CODE

TDF5140A 18 DIL plastic SOT102

1999 March 15 2

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDF5140A

BLOCK DIAGRAM

−AMP IN +AMP IN

CAP-ST

CAP-DC CAP-CD

TEST

CAP-TI

PG/FG

13 14

10 9

PROTECTION

THERMAL

ROTATION POSITION

SPEED

&

DETECTOR

OUTPUT

STAGE

AMP OUT

CONDUCTANCE

AMPLIFIER

START-UP

OSCILLATOR

ADAPTIVE

COMMUTATION

DELAY

TIMING

DIVIDE

POSITION

DETECTOR

STAGE

TRANS-

BY 2

COMMUTATION

LOGIC

VMOT

PUSH/PULL

FLYBACK

OUTPUT

DRIVER

STAGE 1

OUTPUT DRIVER

STAGE 2

OUTPUT DRIVER

STAGE 3

MOT1

MOT2

MOT3

TDF5140A

57 8

PGIN GND218GND1 V

Fig.1 Block diagram

1999 March 15 3

EMF COMPARATORS

MGH313

MOT0

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDF5140A

PINNING

SYMBOL

MOT1 1 driver output 1 TEST 2 test input/output MOT2 3 driver output 2 VMOT 4 input voltage for the output driver stages PG IN 5 position generator: input from the position detector sensor to the position

PG/FG 6 position generator/frequency generator: output of the rotation speed and position

GND2 7 ground supply return for control circuits V

CAP-CD 9 external capacitor connection for adaptive communication delay timing CAP-DC 10 external capacitor connection for adaptive communication delay timing copy CAP-ST 11 external capacitor connection for start-up oscillator CAP-TI 12 external capacitor connection for timing +AMP IN 13 non-inverting input of the transconductance ampliﬁer

−AMP IN 14 inverting input of the transconductance ampliﬁer AMP OUT 15 transconductance ampliﬁer output (open collector) MOT3 16 driver output 3 MOT0 17 input from the star point of the motor coils GND1 18 ground (0 V) motor supply return for output stages

DIL18

detector stage (optional); only if an external position coil is used

detector stages (open collector digital output, negative-going edge is valid)

8 positive supply voltage

DESCRIPTION

1999 March 15 4

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDF5140A

MOT1

TEST

MOT2

VMOT

PG IN

PG/FG

GND2

CAP-CD

1 2 3 4 5

TDF5140A

6 7 8 9

MGH311

Fig.2 Pin configuration

17 16

15 14 13 12 11 10

+AMP IN CAP-TI

GND1 MOT0 MOT3

AMP OUT

-AMP IN

CAP-ST CAP-DC

FUNCTIONAL DESCRIPTION

The TDF5140A offers a sensorless three phase motor drive function. It is unique in its combination of sensorless motor drive and full-wave drive. The TDF5140A 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 TDF5140A 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 (0.8 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.

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Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDF5140A

amb

MBD535

2.80

(W)

tot

2.28

1.05



0 200

50 100 150

T ( C)

Fig.3 Power derating curve (SOT102; DIL18).

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

VI< 18 V −0.3 VP + 0.5 V

VMOT V V

VMOT O

VMOT input voltage −0.5 20 V

output voltage

AMP OUT and PG/FG GND V MOT1, MOT2 and MOT3 −1V

input voltage CAP-ST, CAP-TI,

− 2.5 V

P VMOT

+ V

DHF

CAP-CD and CAP-DC T

stg

amb

tot

storage temperature −55 +150 °C

operating ambient temperature −30 +70 °C

total power dissipation see Fig. 3 −− W

electrostatic handling see “Handling” − 500 V

V V

HANDLING

Every pin withstands the ESD test in accordance with

“MIL-STD-883C class 2”

3 pulses + and 3 pulses − on each pin referenced to ground.

1999 March 15 6

. Method 3015 (HBM 1500 Ω, 100 pF)

+ 13 hidden pages