Philips TDA5241 Datasheet

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Product specification File under Integrated Circuits, ICO1

Philips Semiconductors

November 96

Philips Semiconductors

Product specification

Brushless DC motor drive circuit

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

.Built-in start-up circuit .Optimum commutation independent on motor type or motor loading .Built-in flyback diodes .Three push-pull outputs:

-0.85 A output current

-built-in current limiter .Thermal protection .Low current consumption by adaptative base-drive .Tacho output without extra sensor.

..Comparator for external position generator (PG) signal

.Built-in multiplexer combining internal FG and external PG signal on one pin for easy use with a controlling

microprocessor

.Linear control of the output stages .PG signal output.

TDA5241

APPLICATIONS .General purpose spindle driver ( e.g. VCR scanner motor).

GENERAL DESCRIPTION The TDA5241 is a bipolar integrated circuit used to drive brush less DC motors in full-wave mode. The device senses the

rotor position using an EMF-sensing technique and is ideally suited as a drive circuit for VCR scanner motors.

QUICK REFERENCE DATA

~ Measured over full voltage and temperature ranges

SYMBOL

IUM

Note

1. An unstabilized supply can be used; Transients of 2 V allowed with max slope 0.1 V/J.ls.

supply voltage range (note 1 } 4

I cu!rent limiting

I oU~Ut voltage at 10 = 100 mA(Upper+Lower transistor)

PARAMETER MIN. TYP.

0.6

0.85

0.93

MAX.

UNIT

v A V

2/19

Philips Semiconductors

Product specification

Brushless DC motor drive circuit

ORDERING INFORMATION

TDA5241

March 1997

Fig.1 Power derating curve .

3/19

Philips Semiconductors

Brushless DC motor drive circuit

BLOCK DIAGRAM

Product specification

TDA5241

March 1997

4/19

Philips Semiconductors

Product specification

Brushless DC motor drive circuit

PINNING

SYMBOL PIN

GND1

n.c.

MOT2

Vp PGIN

FGPG GND2 PGOUT CAP-CDM CAP-CDS CAP-ST CAP- TI CTLIN MOTO CAP-CPC MOT3 n.c. MOT1

1 2 3 4

6 7 8 9

10 11 12 13 14 15 16 17 18

ground (0 V) motor supply return for output stages not connected driver output 2

Dositive suDDlv voltage

position generator: input from the position detector sensor to the position detector stage (optional) FG/PG (open collector)

ground supply return for control circuits position generator output of the position detector stage external capacitor connection for commutation delay timing external capacitor connection for commutation delay timing copy external capacitor connection for start-up oscillator external capacitor connection for timing non-inverting input of the control amplifier input from the start point of the motor coils external capacitor for stability of control loop

driver output 3

I not connected

I driver output 1

TDA5241

DESCRIPTION

GND1

n.c

MOT2

PGIN

FGPG GND2

PGOUT

CAP-CDM

10 I

6 7

TDA5241

MOT1

17 n.c

16 MOT3

CAP-CPC

MOTO

CTLIN

CAP- TI

CAP-ST

111

CAP-CDS

110

Fig.3 Pin configuration.

March 1997

5/19

Philips Semiconductors

Product specification

Brushless DC motor drive circuit

TDA5241

FUNCTIONAL DESCRIPTION

The TDA5241 offers a sensorless three phase motor drive function. It is unique in its combination of sensorless motor

drive and full-wave drive. The TDA5241 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 TDA5241 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 (0.85 A)

.Outputs protected by current limiting and thermal protection of each output transistor .Low current consumption by adaptive base-drive .Accurate frequency generator (FG) by using the motor EMF .Comparator for external position generator (PG) signal

.Built-in multiplexer combining internal FG and external PG signals on one pin for easy use with a controlling

microprocessor

.Linear control of the output stages.

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

PARAMETER

SYMBOL

1 0

Ptot

Tamb

supply voltage

input voltage; all pins except Vp (VI < 8 V)

output voltage; PGOUT and PG/FG

output voltage; MOTO, MOT1, MOT2 and MOT3

input voltage; CAP-ST, CAP- TI, CAP-CD and CAP-DC

total power dissipation

storage temperature range

I operating ambient temperature range

-0.3

GND

-1

~ 1-10

MIN.

MAX.

V p + 0.5 Vp

Vp + Vo

2.5 see power

derating curve

+150 +70

UNIT

v v v v v

loc ~

March 1997

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