Philips TDA5145TS Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA5145TS

Brushless DC motor drive circuit

Product speciﬁcation File under Integrated Circuits, IC11

1998 Oct 27

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5145TS

FEATURES

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

• Built-in start-up circuitry

• Three push-pull outputs:

APPLICATIONS

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

– Output current 2.0 A (typ.) – Built-in current limiter – Soft-switching outputs for low Electromagnetic

Interference (EMI).

• Thermal protection

• Flyback diodes

• Motor brake facility

• Direction control input

GENERAL DESCRIPTION

The TDA5145TS 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).

• Reset function.

QUICK REFERENCE DATA

Measured over full voltage and temperature range.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

i(VMOT)

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

note 2 1.7 − 16 V

stages V I

LIM

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

current limiting V

=10V; Ro= 1.2 Ω 1.8 2.0 2.5 A

VMOT

Notes

1. An unstabilized supply can be used.

2. V

VMOT=VP

; all outputs Io= 0 mA.

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

TDA5145TS SSOP24 plastic shrink small outline package; 24 leads;

body width 5.3 mm

SOT340-1

1998 Oct 27 2

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5145TS

BLOCK DIAGRAM

handbook, full pagewidth

CAP-ST

CAP-DC CAP-CD

TEST

CAP-TI

DIR

13 12

THERMAL

PROTECTION

START-UP

OSCILLATOR

ADAPTIVE

COMMUTATION

DELAY

TIMING

DIRECTION

CONTROL

BRAKE

COMMUTATION

RESET

818

RESET

LOGIC

VMOT

6, 7

PUSH/PULL

FLYBACK

OUTPUT DRIVER

STAGE 2

STAGE 3

OUTPUT

DRIVER

STAGE 1

1, 2

4, 5

20, 21

MOT1

MOT2

MOT3

TDA5145TS

10 11

GND2

GND1 V

Fig.1 Block diagram.

1998 Oct 27 3

23, 24

MOT0

EMF COMPARATORS

MGR391

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5145TS

PINNING

SYMBOL PIN DESCRIPTION

MOT1 1 driver output 1 MOT1 2 driver output 1 TEST 3 test input/output MOT2 4 driver output 2 MOT2 5 driver output 2 VMOT 6 input voltage for the output driver

stages

VMOT 7 input voltage for the output driver

stages

BRAKE 8 brake input; this pin may not be left

ﬂoating, a LOW-level voltage must be applied to disable this function

DIR 9 direction control input; this pin may

not be left ﬂoating

GND2 10 ground supply return for control

circuits

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 n.c. 16 not connected n.c. 17 not connected RESET 18 reset input; this pin may not be left

ﬂoating, a LOW-level voltage must

be applied to disable this function n.c. 19 not connected MOT3 20 driver output 3 MOT3 21 driver output 3 MOT0 22 input from the star point of the motor

coils GND1 23 ground (0 V) motor supply return for

output stages GND1 24 ground (0 V) motor supply return for

output stages

handbook, halfpage

MOT1 MOT1

TEST MOT2 MOT2

VMOT VMOT

BRAKE

DIR

GND2

CAP-CD

1 2 3 4 5 6 7 8

9 10 11

TDA5145TS

MGR392

24 23 22 21 20 19 18 17

16 15 14 13

GND1 GND1 MOT0 MOT3 MOT3 n.c. RESET n.c. n.c. CAP-TI CAP-ST CAP-DC

Fig.2 Pin configuration.

FUNCTIONAL DESCRIPTION

The TDA5145TS offers a sensorless 3-phase motor drive function. It is unique in its combination of sensorless motor drive and full-wave drive. The TDA5145TS 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 TDA5145TS 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

• Direction of rotation controlled by one pin

• Brake function.

1998 Oct 27 4

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5145TS

LIMITING VALUES

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

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

I(n)

I(VMOT)

I(n1)

stg

amb

tot

supply voltage − 18 V input voltage; all pins except

VI<18V −0.3 VP+ 0.5 V

VMOT VMOT input voltage −0.5 +17 V output voltage MOT0, MOT1,

−1V

VMOT+VdFD

MOT2 and MOT3 input voltage CAP-ST, CAP-TI,

− 2.5 V

CAP-CD and CAP-DC storage temperature −55 +150 °C operating ambient temperature 0 +70 °C total power dissipation see Fig. 3 −− W electrostatic handling see Chapter “Handling” − 2000 V

HANDLING

Every pin withstands the ESD test according to

“MIL-STD-883C class 2”

positive and 3 pulses negative on each pin referenced to ground.

1.00

0.57

P (W)

tot

−50

0 200

50 100 150

handbook, halfpage

. Method 3015 (HBM 1500 Ω; 100 pF) 3 pulses

MGL529

(°C)

amb

Fig.3 Power derating curve.

1998 Oct 27 5

Philips Semiconductors Product speciﬁcation

Brushless DC motor drive circuit TDA5145TS

CHARACTERISTICS

= 14.5 V; T

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

i(VMOT)

Thermal protection

∆T reduction in temperature before

MOT0; centre tap

bias

CSW

∆V

CSW

hys

MOT1, MOT2 and MOT3; see Fig.4 V

∆V

sat(lt)

∆V

sat(ut)

LIM

dF(DH)

dF(DL)

DIR

=25°C; unless otherwise speciﬁed.

amb

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

local temperature at temperature

130 140 150 °C

sensor causing shut-down

after shut-down − T

− 30 − K

switch-on

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

− 1.5 V −10 −−µA

VMOT

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

−− 3mV

levels comparator input hysteresis − 75 −µV

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

= 1000 mA − 1.6 1.85 V

variation in saturation voltage

Io= 100 mA −− 180 mV

between lower transistors variation in saturation voltage

Io= −100 mA −− 180 mV

between upper transistors current limiting V rise time switching output V fall time switching output V diode forward voltage (diode DH)Io=−500 mA;

=10V; Ro= 1.2 Ω 1.8 2.0 2.5 A

VMOT

= 15 V; see Fig.5 5 10 15 µs

VMOT

= 15 V; see Fig.5 10 15 20 µs

VMOT

−− 1.5 V

notes 4 and 5; see Fig.1

diode forward voltage (diode DL)Io= 500 mA;

−1.5 −−V

notes 4 and 5; see Fig.1

peak diode current note 5 −− 2.5 A

HIGH-level input voltage 4V<VP< 18 V 2.0 −−V LOW-level input voltage 4V<VP<18V −− 0.8 V LOW-level input current −−20 −µA HIGH-level input current − 20 −µA

1998 Oct 27 6

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