TDA5145T データシートの表示（PDF） - Philips Electronics

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TDA5145T

Brushless DC motor drive circuit

Philips Electronics 

Philips Semiconductors

Brushless DC motor drive circuit

Product specification

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

VP

VVMOT

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; +AMP IN = −AMP IN = 0 V; 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

TDA5145

TDA5145T

PINS

28

28

PACKAGE

PIN POSITION

DIL

SOL

MATERIAL

plastic

plastic

CODE

SOT117-1

SOT136-1

June 1994

2

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