TDA5149 datasheet(4/28 Pages) PHILIPS

Part #	TDA5149

Description	12 V Voice Coil Motor VCM driver and spindle motor pre-driver combination chip

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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4 / 28 page

1996 May 06

4

Philips Semiconductors

Product speciﬁcation

12 V Voice Coil Motor (VCM) driver and

spindle motor pre-driver combination chip

TDA5149G

Fig.2 Block diagram of the VCM and RESET circuits.

handbook, full pagewidth

MGE656

M

FOLLOWER

PREAMP

PARK

CIRCUITRY

SENSE

BUFFER

REFERENCE

CURRENT

GENERATOR

REFERENCE

VOLTAGE

GENERATOR

LATCH

CIRCUITRY

LACTIVE

LHOLD

from the

serial port

TEMPERATURE

SENSOR

POWER-

ON RESET

GENERATOR

OPAMP

to the

PARK

circuit

COMP

+5 V

+12 V

+12 v

from the

serial port

from the

POR circuit

Ccomp R

comp

VCMIN2

VCMIN1

Rfb

VCMSENSOUT

VCMref

Vref(o)

Iref

POR12ADJ

POR5ADJ

VCM_CONT1

VCM_CONT2

AMPIN

−

AMPIN

+

AMPOUT

CLAMP

PGND1

VDDV

VCM+

VCM−

PGND2

VCMSENSEL

VCMSENSEH

latch

LATCHACTIV

LATCHHOLD

TEMPMON

RESETP

RESETA

PORDELAY

26

35

34

37

52

53

42

48

43

44

39

36

32

38

33

31

30

40

41

50

46

49

17

29

28

100 nF

R8

from the

spindel

27

Ω

100 nF

27

Ω

Rin2

Rin1

VCM

input

VCM

reference

input

TDA5149G

disable

park

brake

VGAINSEL

VCMref

R

*

20 k

Ω

23 k

Ω

50 k

Ω

10 k

Ω

10 k

Ω

50 k

Ω

−

+

−

+

−

+

−

+

−

+

+5 V

+12 V

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TDA5149 Datasheet(PDF) 4 Page - NXP Semiconductors

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