Philips TDA5145T, TDA5145 Datasheet

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

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Philips Semiconductors Product speciﬁcation

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Brushless DC motor drive circuit TDA5145

BLOCK DIAGRAM

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Pin numbers for both DIL and SOL packages are identical.

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Fig.1 Block diagram.

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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

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5145

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

MOT0; centre tap

V

I

V

CSW

∆V

CSW

input voltage −0.5 − V input bias current 0.5 V < VI< V comparator switching level note 3 ±20 ±25 ±30 mV variation in comparator switching

levels

V

hys

comparator input hysteresis − 75 −µV

MOT1, MOT2 and MOT3; see Fig.5

V

∆V

DO

OL

drop-out output voltage IO= 100 mA − 0.9 1.05 V

variation in saturation voltage between lower transistors

∆V

OH

variation in saturation voltage between upper transistors

I

LIM

t

r

t

f

V

DHF

V

DLF

I

DM

current limiting V rise time switching output V fall time switching output V diode forward voltage (diode DH)I

diode forward voltage (diode DL)I

peak diode current note 5 −− 2.5 A

+AMP IN and −AMP IN

V

I

input voltage −0.3 − VP− 1.7 V differential mode voltage without

‘latch-up’

I

b

C

I

V

offset

input bias current −− 650 nA input capacitance − 4 − pF input offset voltage −− 10 mV

AMP OUT (open collector)

I V V

sink

sat O

output sink current 40 −−mA saturation voltage II=40mA − 1.5 2.1 V

output voltage −0.5 − +18 V SR slew rate R G

tr

transfer gain 0.3 −−S

DIR

V

IH

V

IL

I

IL

I

IH

HIGH level input voltage 4 V < VP< 18 V 2.0 −−V

LOW level input voltage 4 V < VP<18V −− 0.8 V

LOW level input current −−20 −µA

HIGH level input current − 20 −µA

VMOT

− 1.5 V −10 −−µA

VMOT

−− 3mV

I

= 1000 mA − 1.6 1.85 V

O

IO= 100 mA −− 180 mV

IO= −100 mA −− 180 mV

= 10 V; RO= 1.2 Ω 1.8 2.0 2.5 A

VMOT

= 15 V; see Fig.6 5 10 15 µs

VMOT

= 15 V; see Fig.6 10 15 20 µs

VMOT

=−500 mA;

O

−− 1.5 V

notes 4 and 5; see Fig.1

= 500 mA;

O

−1.5 −−V

notes 4 and 5; see Fig.1

−− ±V

= 330 Ω; CL=50pF − 60 − mA/µs

L

P

V

June 1994 7

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5145

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

RESET

V

IH

HIGH level input voltage reset mode;

4V<VP<18V

V

IL

LOW level input voltage normal mode;

4V<VP<18V

I

IL

I

IH

LOW level input current VI= 2.0 V −−20 −µA

HIGH level input current VI= 0.8 V − 20 −µA

BRAKE

V

IH

HIGH level input voltage brake mode;

4V<VP<18V

V

IL

LOW level input voltage normal mode;

4V<VP<18V

I

IL

I

IH

LOW level input current VI= 2.0 V −−20 −µA

HIGH level input current VI= 0.8 V − 20 −µA

FG (open collector)

V

OL

V

OH(max)

t

THL

LOW level output voltage IO= 1.6 mA −− 0.4 V

maximum HIGH level output voltage V

HIGH-to-LOW transition time CL= 50 pF; RL=10kΩ− 0.5 −µs

ratio of FG frequency and

commutation frequency δ duty factor − 50 − %

2.0 −−V

−− 0.8 V

2.0 −−V

−− 0.8 V

P

−−V

− 1:2 −

CAP-ST

I

sink

I

source

V

SWL

V

SWH

CAP-TI

I

sink

I

source

V

SWL

V

SWM

V

SWH

CAP-CD

I

sink

I

source

I

sink/Isource

V

IL

V

IH

output sink current 1.5 2.0 2.5 µA

output source current −2.5 −2.0 −1.5 µA

LOW level switching voltage − 0.20 − V

HIGH level switching voltage − 2.20 − V

output sink current − 28 −µA

output source current 0.2 V < V

0.3V<V

< 0.3 V −−57 −µA

CAP-TI

< 2.2 V −−5−µA

CAP-TI

LOW level switching voltage − 50 − mV

MIDDLE level switching voltage − 0.30 − V

HIGH level switching voltage − 2.20 − V

output sink current 10.6 16.2 22 µA

output source current −5.3 −8.1 −11 µA

ratio of sink to source current 1.85 2.05 2.25

LOW level input voltage 850 875 900 mV

HIGH level input voltage 2.3 2.4 2.55 V

June 1994 8