Philips tda5142t DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

TDA5142T

Brushless DC motor drive circuit

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

Philips Semiconductors

June 1994

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:

APPLICATIONS

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

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

GENERAL DESCRIPTION

The TDA5142T is a bipolar integrated circuit used to drive
3-phase brushless DC motors in full-wave mode. The

• Thermal protection

• Tacho output without extra sensor

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

• Transconductance amplifier for an external
control transistor

• Motor brake facility.

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.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

V

VMOT

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

3 − 18 V

driver stages

V

O

I

LIM

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

= 100 mA; upper transistor 1.05 −−V

I

O

current limiting V

= 14.5 V; RO=47Ω 150 200 250 mA

VMOT

Note

1. An unstabilized supply can be used.

ORDERING INFORMATION

PACKAGE

TYPE NUMBER

PINS PIN POSITION MATERIAL CODE

TDA5142T 24 SOL plastic SOT137-1

June 1994 2

Philips Semiconductors Product specification

BBB

BBBB

BB

BBB

BB

B
B

BB

BB
BB

B

BBBBBBB

B
B
B
B
B
B

Brushless DC motor drive circuit TDA5142T

BLOCK DIAGRAM

BBBBBB

B
B

BBBB
BBBB
BBBB
BBBB
BBBB
BBBB

June 1994 3

Fig.1 Block diagram.

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

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

11 supply voltage

June 1994 4

Philips Semiconductors Product specification

Brushless DC motor drive circuit TDA5142T

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

Fig.2 Pin configuration.

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

V

I

supply voltage 4 18 V
input voltage; all pins except

VI< 18 V −0.3 VP + 0.5 V

VMOT

V

VMOT

V

O

VMOT input voltage 3 18 V
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,

− 2.5 V

CAP-CD and CAP-DC

T

stg

T

amb

P

tot

V

es

storage temperature −55 +150 °C
operating ambient temperature 0 +70 °C
total power dissipation see Fig.3 −− W
electrostatic handling see Chapter “Handling” − 500 V

June 1994 5

Philips Semiconductors Product specification

Brushless DC motor drive circuit TDA5142T

HANDLING

MLB777

o

T ( C)

amb

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.

P
(W)

3

tot

2

1

0

50

0 200

50 100 150

70

Fig.3 Power derating curve.

CHARACTERISTICS

V

= 14.5 V; T

P

=25°C; unless otherwise specified.

amb

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

P

I

P

V

VMOT

supply voltage note 1 4 − 18 V
supply current note 2 − 5.2 6.25 mA
input voltage to the output driver

see Fig.1 3 − 18 V

stages

Thermal protection

T

SD

local temperature at temperature

130 140 150 °C

sensor causing shut-down

∆T reduction in temperature before

after shut-down − T

− 30 − K

SD

switch-on

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

V
I

I

V
∆V

I

CSW

CSW

input voltage −0.5 − V
input bias current 0.5 V < VI< V

− 1.5 V −10 − 0 µA

VMOT

VMOT

V

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

−3 0 +3 mV

levels

V

hys

comparator input hysteresis − 75 −µV

June 1994 6