Philips TDA5142T-C2 Datasheet

DATA SH EET

Product speciﬁcation Supersedes data of March 1992 File under Integrated Circuits, IC11

June 1994

INTEGRATED CIRCUITS

Philips Semiconductors

TDA5142T

Brushless DC motor drive circuit

June 1994 2

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5142T

FEATURES

• Full-wave commutation without position sensors

• Built-in start-up circuitry

• Six outputs that can drive three external transistor pairs:

– output current 0.2 A (typ.) – low saturation voltage – built-in current limiter

• Thermal protection

• Tacho output without extra sensor

• Transconductance amplifier for an external

control transistor

• Motor brake facility.

APPLICATIONS

• High-power applications e.g.: – high-end hard disk drives – automotive.

GENERAL DESCRIPTION

The TDA5142T 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. It includes a brake function and 6 pre-drivers able to control FETs or bipolar external transistors. It is ideally suited for high-power applications such as high-end hard disk drives, automotive and other applications.

QUICK REFERENCE DATA

Measured over full voltage and temperature range.

Note

1. An unstabilized supply can be used.

ORDERING INFORMATION

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

supply voltage note 1 4 − 18 V

V

VMOT

input voltage to the output driver stages

3 − 18 V

V

O

driver output voltage IO= 100 mA; lower transistor −−0.35 V

I

O

= 100 mA; upper transistor 1.05 −−V

I

LIM

current limiting V

VMOT

= 14.5 V; RO=47Ω 150 200 250 mA

TYPE NUMBER

PACKAGE

PINS PIN POSITION MATERIAL CODE

TDA5142T 24 SOL plastic SOT137-1

June 1994 3

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5142T

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Fig.1 Block diagram.

June 1994 4

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5142T

PINNING

SYMBOL PIN DESCRIPTION

OUT-NB 1 driver output B for driving the n-channel power FET or power NPN OUT-PB 2 driver output B for driving the n-channel power FET or power PNP GND1 3 ground (0 V) motor supply return for output stages OUT-PC 4 driver output C for driving the n-channel power FET or power PNP OUT-NC 5 driver output C for driving the n-channel power FET or power NPN VMOT 6 input voltage for the output driver stages TEST 7 test input/output BRAKE 8 brake input FG 9 frequency generator: output of the rotation speed detector stage GND2 10 ground supply return for control circuits V

P

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 +AMP IN 16 non-inverting input of the transconductance ampliﬁer

−AMP IN 17 inverting input of the transconductance ampliﬁer AMP OUT 18 transconductance ampliﬁer output (open collector) COMP-A 19 comparator input corresponding to output A COMP-B 20 comparator input corresponding to output B COMP-C 21 comparator input corresponding to output C MOT0 22 input from the star point of the motor coils OUT-NA 23 driver output A for driving the n-channel power FET or power NPN OUT-PA 24 driver output A for driving the n-channel power FET or power PNP

June 1994 5

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5142T

Fig.2 Pin configuration.

FUNCTIONAL DESCRIPTION

The TDA5142T offers a sensorless three phase motor drive function. It is unique in its combination of sensorless motor drive and full-wave drive. The TDA5142T offers protected outputs capable of driving external power FETs or bipolar power transistors. It can easily be adapted for different motors and applications. The TDA5142T 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.

• Six output drivers.

• Maximum output current 0.25 A.

• Outputs protected by current limiting and thermal

protection.

• Low current consumption.

• Accurate frequency generator (FG) by using the

motor EMF.

• Brake function.

• Uncommitted operational transconductance amplifier

(OTA), with a high output current, for use as a control amplifier or as a level shifter in a Switched Mode Power Supply (SMPS) drive.

LIMITING VALUES

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

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

P

supply voltage 4 18 V

V

I

input voltage; all pins except VMOT

VI< 18 V −0.3 VP + 0.5 V

V

VMOT

VMOT input voltage 3 18 V

V

O

output voltage

FG GND V

P

V AMP OUT − 18 V OUT-NA, OUT-NB and OUT-NC − V

VMOT

− 0.9 V

OUT-PA, OUT-PB and OUT-PC 0.2 − V

V

I

input voltage CAP-ST, CAP-TI, CAP-CD and CAP-DC

− 2.5 V

T

stg

storage temperature −55 +150 °C

T

amb

operating ambient temperature 0 +70 °C

P

tot

total power dissipation see Fig.3 −− W

V

es

electrostatic handling see Chapter “Handling” − 500 V

June 1994 6

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5142T

P

tot

(W)

50

3

2

0

0 200

MLB777

50 100 150

T ( C)

amb

o

70

1

Fig.3 Power derating curve.

HANDLING

Every pin withstands the ESD test according to

“MIL-STD-883C class 2”

. Method 3015 (HBM 1500 Ω, 100 pF) 3 pulses + and 3 pulses − on each pin referenced to ground.

CHARACTERISTICS

V

P

= 14.5 V; T

amb

=25°C; unless otherwise speciﬁed.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

P

supply voltage note 1 4 − 18 V

I

P

supply current note 2 − 5.2 6.25 mA

V

VMOT

input voltage to the output driver stages

see Fig.1 3 − 18 V

Thermal protection

T

SD

local temperature at temperature sensor causing shut-down

130 140 150 °C

∆T reduction in temperature before

switch-on

after shut-down − T

SD

− 30 − K

COMP-A, COMP-B, COMP-C and MOT0

V

I

input voltage −0.5 − V

VMOT

V

I

I

input bias current 0.5 V < VI< V

VMOT

− 1.5 V −10 − 0 µA

V

CSW

comparator switching level note 3 ±20 ±25 ±30 mV

∆V

CSW

variation in comparator switching levels

−3 0 +3 mV

V

hys

comparator input hysteresis − 75 −µV

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