TDA5149 データシートの表示（PDF） - Philips Electronics
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TDA5149
Philips Electronics
TDA5149 Datasheet PDF : 28 Pages
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Philips Semiconductors
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
Product specification
TDA5149G
handbook, full pagewidth
Ccomp Rcomp
VCM
input
from the
serial port
Rin2
Rin1
VCMIN2 40
from the
POR circuit
VGAINSEL
VCM_CONT1
PARK
VCM_CONT2 CIRCUITRY
brake
park
disable
VCMIN1 41
VCMref
−
PREAMP
+
FOLLOWER
VCM
reference
input
Rfb
50
VCMSENSOUT 46
VCMref
Vref(o) 49
+12 v
R
R*
−
PREAMP
+
TDA5149G
BUFFER
FOLLOWER
50 kΩ
−
SENSE
+
50 kΩ
Iref 17
+12 V
POR12ADJ 29
+5 V
POR5ADJ 28
REFERENCE
CURRENT
GENERATOR
REFERENCE
VOLTAGE
GENERATOR
−
COMP
+
+
COMP
−
LATCH
CIRCUITRY
LACTIVE LHOLD
from the
serial port
TEMPERATURE
SENSOR
POWER-
ON RESET
GENERATOR
−
OPAMP
+
30 AMPIN−
31 AMPIN+
33 AMPOUT
38 CLAMP
32 PGND1
from the
spindel
36 VCM−
20 kΩ
39 VDDV
23 kΩ
44 VCM+
M
R8
27 Ω
100 nF
48 PGND2
10 kΩ
10 kΩ
43
VCMSENSEL
42
VCMSENSEH
+5 V
+12 V
53 LATCHACTIV
latch
52
LATCHHOLD
37 TEMPMON
to the
PARK
circuit
27 Ω
100 nF
26
PORDELAY
35
RESETA
34
RESETP
MGE656
Fig.2 Block diagram of the VCM and RESET circuits.
1996 May 06
4
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