Philips tda5145 DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

TDA5145

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 TDA5145

FEATURES

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

• Built-in start-up circuitry

• Three push-pull outputs:

– output current 2.0 A (typ.)
– built-in current limiter
– soft-switching outputs for low Electromagnetic

Interference (EMI)

• Thermal protection

• Flyback diodes

• Tacho output without extra sensor

• Motor brake facility

• Direction control input

• Reset function

• Transconductance amplifier for an external control

transistor.

APPLICATIONS

• General purpose spindle driver e.g.:
– Hard disk drive
– Tape drive
– Optical disk drive.

GENERAL DESCRIPTION

The TDA5145 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 bidirectional control, brake function and has a
special circuit built-in to reduce the EMI (soft switching
output stages).

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 driver

note 2 1.7 − 16 V

stages
V
I

DO

LIM

drop-out output voltage IO= 100 mA − 0.90 1.05 V

current limiting V

= 10 V; RO= 1.2 Ω 1.8 2.0 2.5 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

TYPE NUMBER

PINS PIN POSITION MATERIAL CODE

TDA5145 28 DIL plastic SOT117-1
TDA5145T 28 SOL plastic SOT136-1

June 1994 2

Philips Semiconductors Product specification

B
B
B
B
B
B
B
B
B
B
B
B
B
B
B

BBBB

BBB

B

BB

BBBB

B

BBBBBBB

B
B
B
B
B
B

BB

B

BB

B

B
B
B
B
B

Brushless DC motor drive circuit TDA5145

BLOCK DIAGRAM

BBBBBB

Pin numbers for both DIL and SOL packages are identical.

June 1994 3

BB

BBB
BBB
BBB
BBB
BBB
BBB
BBB
BBB
BBB

B

BBB
BBB
BBB
BBB
BBB
BBB

Fig.1 Block diagram.

BBBBB
BBBBB
BBBBB
BBBBB
BBBBB

BBBBB

BBBB
BBBB
BBBB
BBBB
BBBB
BBBB

Philips Semiconductors Product specification

Brushless DC motor drive circuit TDA5145

PINNING

SYMBOL PIN

MOT1 1 and 2 driver output 1
TEST 3 test input/output
n.c. 4 not connected
MOT2 5 and 6 driver output 2
VMOT 7 and 8 input voltage for the output driver stages
BRAKE 9 brake input; this pin may not be left floating, a LOW level voltage must be applied to disable

DIR 10 direction control input; this pin may not be left floating
FG 11 frequency generator: output of the rotation speed (open collector digital output)
GND2 12 ground supply return for control circuits
V

P

CAP-CD 14 external capacitor connection for adaptive communication delay timing
CAP-DC 15 external capacitor connection for adaptive communication delay timing copy
CAP-ST 16 external capacitor connection for start-up oscillator
CAP-TI 17 external capacitor connection for timing
+AMP IN 18 non-inverting input of the transconductance amplifier

−AMP IN 19 inverting input of the transconductance amplifier
n.c. 20 not connected
RESET 21 reset input; this pin may not be left floating, a LOW level voltage must be applied to disable

AMP OUT 22 transconductance amplifier output (open collector)
MOT3 23 and 24 driver output 3
n.c. 25 not connected
MOT0 26 input from the star point of the motor coils
GND1 27 and 28 ground (0 V) motor supply return for output stages

(1)

this function

13 supply voltage

this function

DESCRIPTION

Note

1. Pin numbers for both DIL and SOL packages are identical.

June 1994 4

Philips Semiconductors Product specification

Brushless DC motor drive circuit TDA5145

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

Fig.2 Pin configuration.

amplifier.

• Brake function.

LIMITING VALUES

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

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

P

V

I

supply voltage − 18 V
input voltage; all pins except

VI< 18 V −0.3 VP + 0.5 V

VMOT

V

VMOT

V

O

V

I

VMOT input voltage −0.5 17 V
output voltage

AMP OUT and FG GND V
MOT0, MOT1, MOT2 and MOT3 −1V

input voltage CAP-ST, CAP-TI,

− 2.5 V

P
VMOT

+ V

DHF

V
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 Figs 3 and 4 −− W
electrostatic handling see Chapter “Handling” − 2000 V

June 1994 5

Philips Semiconductors Product specification

Brushless DC motor drive circuit TDA5145

3.08

1.75

P
(W)

6

tot

4

2

0

50

0 200

50 100 150

70

T ( C)

handbook, halfpage

Fig.3 Power derating curve (SOT117-1; DIL28).

HANDLING

amb

MBD866

o

MBD557

o

T ( C)

amb

P
(W)

1.62

3

tot

2

1

0

50

0 200

50 100 150

Fig.4 Power derating curve (SOT136-1; SO28L).

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

= 14.5 V; T

V

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 − 6.8 7.8 mA
input voltage to the output driver

see Fig.1 1.7 − 16 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

June 1994 6