TDA5149G Philips Semiconductors, TDA5149G Datasheet - Page 4

• Manufacturer Part Number: TDA5149G
• Description: 12 V Voice Coil Motor VCM driver and spindle motor pre-driver combination chip
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1996 May 06
handbook, full pagewidth
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
reference
VCM
input
VCM
input
R in2
R in1
V CMSENSOUT
POR12 ADJ
POR5 ADJ
V CMIN2
V CMIN1
R fb
VCM ref
V ref(o)
I ref
17
40
41
50
46
49
29
28
12 V
5 V
Fig.2 Block diagram of the VCM and RESET circuits.
POR circuit
from the
V GAINSEL
V CMref
12 v
R
R
GENERATOR
GENERATOR
REFERENCE
REFERENCE
*
CURRENT
VOLTAGE
COMP
COMP
BUFFER
serial port
from the
PREAMP
PREAMP
TDA5149G
VCM_CONT2
VCM_CONT1
POR DELAY
brake
park
disable
LACTIVE
4
FOLLOWER
FOLLOWER
CIRCUITRY
TEMPERATURE
C comp R
GENERATOR
CIRCUITRY
PARK
ON RESET
SENSOR
POWER-
26
serial port
LATCH
from the
50 k
50 k
SENSE
LHOLD
comp
35
RESETA
5 V
10 k
10 k
OPAMP
34
RESETP
PARK
circuit
to the
20 k
23 k
12 V
33
38
32
36
39
44
48
43
42
53
52
37
30
31
V DDV
LATCHHOLD
AMPIN
AMPIN
AMPOUT
CLAMP
PGND1
V CM
V CM
PGND2
V CMSENSEL
V CMSENSEH
LATCHACTIV
TEMPMON
MGE656
latch
R 8
Product specification
M
TDA5149G
from the
spindel
27
100 nF
27
100 nF