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TDA5145TS

Brushless DC motor drive circuit

Philips Electronics 

Philips Semiconductors

Brushless DC motor drive circuit

Product specification

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:

– 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

• Reset function.

APPLICATIONS

• General purpose spindle driver e.g.:

– Hard disk drive

– Tape drive

– Optical disk drive.

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).

QUICK REFERENCE DATA

Measured over full voltage and temperature range.

SYMBOL

PARAMETER

CONDITIONS

VP

Vi(VMOT)

VDO

ILIM

supply voltage

input voltage to the output driver

stages

drop-out output voltage

current limiting

note 1

note 2

Io = 100 mA

VVMOT = 10 V; Ro = 1.2 Ω

Notes

1. An unstabilized supply can be used.

2. VVMOT = VP; all outputs Io = 0 mA.

MIN.

4

1.7

−

1.8

TYP.

−

−

0.90

2.0

MAX.

18

16

1.05

2.5

UNIT

V

V

V

A

ORDERING INFORMATION

TYPE

NUMBER

TDA5145TS

NAME

SSOP24

PACKAGE

DESCRIPTION

plastic shrink small outline package; 24 leads;

body width 5.3 mm

VERSION

SOT340-1

1998 Oct 27

2

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