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TDA5149G

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

Philips Electronics 

Philips Semiconductors

12 V Voice Coil Motor (VCM) driver and

spindle motor pre-driver combination chip

Product specification

TDA5149G

PINNING

SYMBOL

PIN

I/O

DESCRIPTION

CAPY

1

I/O charge pump capacitor

MOT0

2

I motor centre tap input

H1

3

O driver output to gate of upper power FET 1

MOT1

4

I back EMF comparator input 1

L1

5

O driver output to gate of lower power FET 1

H2

6

O driver output to gate of upper power FET 2

MOT2

7

I back EMF comparator input 2

L2

8

O driver output to gate of lower power FET 2

H3

9

O driver output to gate of upper power FET 3

MOT3

10

I back EMF comparator input 3

L3

11

O driver output to gate of lower power FET 3

IDRIVE

12

I adjustment for output stage drive current

SPINSENSEH

13

I positive spindle sense amplifier input

SPINSENSEL

14

I negative spindle sense amplifier input

SISENS

15

O spindle sense amplifier output

AGND

Iref

SINTIN

16

− general analog ground; note 1

17

O reference current generator output

18

I negative integrator input

ISPIN

19

I positive integrator input, average current adjustment

SICOMP

20

O integrator output

RPOS

21

I duty cycle modulator input

CSS1

22

I/O soft switching capacitor 1

CSS2

23

I/O soft switching capacitor 2

STOSC

24

I/O sawtooth oscillator capacitor

SCANOUT

25

O test output

PORDELAY

VDDA1

POR5ADJ

POR12ADJ

AMPIN−

26

I/O power-on reset delay capacitor (active LOW)

27

− analog supply voltage 1 (+5 V)

28

O adjustment of POR threshold (for +5 V)

29

O adjustment of POR threshold (for +12 V)

30

I negative input of the uncommitted operational amplifier

AMPIN+

31

I positive input of the uncommitted operational amplifier

PGND1

AMPOUT

32

− power ground 1 for VCM DMOS; note 1

33

O uncommitted operational amplifier output

RESETP

34

O power-on reset digital output with passive pull-up resistor

RESETA

35

O power-on reset digital output with active pull-up resistor

VCM−

TEMPMON

36

O negative output voltage of the VCM power stage

37

O temperature monitor output

CLAMP

38

I/O clamp capacitor used for head retraction

VDDV

VCMIN2

39

− power supply for VCM DMOS driver (+12 V)

40

I switchable VCM control input voltage

1996 May 06

5

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