TDA7278 Datasheet, PDF (5/15 Pages) STMicroelectronics – HIGH-EFFICIENCY CD ACTUATOR DRIVER

Figure 1: Block Diagram.
TDA7278
22
ST CAP
38
VREF (2)
SYNC
23
OSCILL
11
VHIGH
10
OUT
VBAT
4
VBAT
30
37 35
V bg
43
ER
+
-
VHIGH
VBAT
DRIV
S
-
Q
R
+
VHIGH
DRIV
VHIGH
DRIV
5
FL IN 1
8
H IN 1
7
H OUT 1A
9
H OUT 1B
13
INP
14
IRC
15
VCPU
16
OUT1
OUT2
17
12
SSCAP
VHIGH
DRIV
-
Vbg
+
18
VBG
24
ENABLE
VBAT
REFERENCE Vbg
and
THERMAL
Vbg/2
20
CRES
RESET
19
21
WD INP
41
BEMP
BLOW
40
VCPU
39
VCON
CONTROL
Vbg
Vbg/2
+
-
Vbg/2
+
-
VHIGH
VBAT
DRIV
S
ER
-
Q
R
+
VHIGH
+
DRIV
-
VHIGH
DRIV
29
FL IN 3
26
H IN 3
27
H OUT 3A
25
H OUT 3B
VHIGH
VBAT
DRIV
S
ER
-
Q
R
+
VHIGH
+
DRIV
-
VHIGH
DRIV
3
FL IN 2
1
H IN 2
2
H OUT 2A
44
H OUT 2B
VHIGH
VBAT
DRIV
S
ER
-
Q
R
+
VHIGH
+
DRIV
-
VHIGH
DRIV
31
FL IN 4
33
H IN 4
32
H OUT 4A
34
H OUT 4B
6
28 42
36
GND GND
D94AU078B
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