TDA7278 STMicroelectronics, TDA7278 Datasheet - Page 6

• Manufacturer Part Number: TDA7278
• Description: Audio DSPs CD Actuator Driver
• Manufacturer: STMicroelectronics

Specifications of TDA7278

• Mounting Style: SMD/SMT
• Package / Case: PQFP-44
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7278
Figure 2: Test Circuit
6/15
COMPENSATION
STEP DOWN
STRUCTURE
FEEDBAKC
NETWORK
(see fig.4)
(see fig.3)
STEP LP
470pF
&
or
VBAT
10 F
10 F
100nF
2 F
1 F
STEP UP
AUXIL.
47 H
VREF (2)
ENABLE
ST CAP
WD INP
SSCAP
RESET
VHIGH
VBAT
BEMP
BLOW
VCON
VCPU
CRES
OUT1
OUT2
OUT
VBG
IRC
INP
22
38
11
10
13
14
15
16
17
12
18
24
20
19
21
41
40
39
VCPU
OSCILL
SYNC
VHIGH
DRIV
REFERENCE
23
CONTROL
THERMAL
and
VBAT
+
+
-
-
4
Vbg/2
Vbg/2
Vbg
V bg
GND
30
Vbg
VBAT
6
+
-
37
28
Vbg
35
42
43
36
+
+
+
+
ER
-
ER
-
ER
-
ER
-
VHIGH
VHIGH
VHIGH
VHIGH
+
+
+
+
-
-
-
-
DRIV
DRIV
DRIV
DRIV
S
R
S
R
S
R
S
R
D94AU111A
Q
Q
Q
Q
VHIGH
VHIGH
VHIGH
VHIGH
DRIV
DRIV
DRIV
DRIV
VHIGH
VHIGH
VHIGH
VHIGH
DRIV
DRIV
DRIV
DRIV
VBAT
VBAT
VBAT
VBAT
29
26
27
25
44
31
33
32
34
5
8
7
9
3
1
2
FL IN 1
H IN 1
H OUT 1A
H OUT 1B
FL IN 3
H IN 3
H OUT 3A
H OUT 3B
FL IN 2
H IN 2
H OUT 2A
H OUT 2B
FL IN 4
H IN 4
H OUT 4A
H OUT 4B
M
M
ACTUATOR
ACTUATOR
TRACKING
100 H
100 H
100 H
100 H
SPINDLE
10 F
10 F
10 F
10 F
SLEDGE
MOTOR
MOTOR
FOCUS