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PDF TDA7278 Data sheet ( Hoja de datos )
| Número de pieza | TDA7278 | |
| Descripción | HIGH-EFFICIENCY CD ACTUATOR DRIVER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TDA7278 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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TDA7278
HIGH-EFFICIENCY CD ACTUATOR DRIVER
WIDE OPERATIVE SUPPLY RANGE (1.6 to
5V) LOW VOLTAGE OPERATION CAPABIL-
ITY
4 LOAD DRIVING VOLTAGES PWM REGU-
LATED (STEP DOWN FROM BATTERY)
LOW ON RESISTANCE H BRIDGES
(2 x 1.6Ω MAX + 2 x 2.5Ω MAX) FOR:
– FOCUS AND TRACKING ACTUATORS
– SLEDGE AND SPINDLE MOTORS
SYNCHRONIZABLE SAWTOOTH OSCILLATOR
CONFIGURABLE DC/DC CONVERTER FOR
ADJUSTABLE MAIN POWER SUPPLY, WITH
LOW ON RESISTANCE (0.4Ω MAX) SWITCH
GENERAL ENABLE INPUT
ADJUSTABLE WATCH DOG AND DELAYED
POWER ON RESET FUNCTIONS
PIN CONNECTION
PQFP44
ADJUSTABLE COMPARATORS FOR BAT-
TERY LOW AND BATTERY EMPTY DETEC-
TION
44 43 42 41 40 39 38 37 36 35 34
H IN 2
H OUT 2A
FLIN 2
VBAT
FLIN 1
GND
H OUT 1A
H IN 1
H OUT 1B
OUT
VHIGH
1
2
3
4
5
6
7
8
9
10
11
33 H IN 4
32 H OUT 4A
31 FLIN 4
30 VBAT
29 FLIN 3
28 GND
27 H OUT 3A
26 H IN 3
25 H OUT 3B
24 ENABLE
23 SYNC
12 13 14 15 16 17 18 19 20 21 22
March 1997
D94AU112A
1/15
1 page  
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
VCPU
OUT1
15
16
OUT2
17
12
SSCAP
VHIGH
DRIV
-
Vbg
+
18
VBG
24
ENABLE
VBAT
REFERENCE
and
THERMAL
Vbg
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
GND GND
36
D94AU078B
5/15
5 Page 
PINS: 35
PIN: 36
TDA7278
35
7V
38
VCPU
-
+
D96AU465
36
7V
38
VCPU
-
+
D96AU466
PIN: 42
PIN: 43
42
7V
38
VCPU
-
+
D96AU467
43
7V
38
VCPU
-
+
D96AU468
PIN: 18
PINS: 19
VBAT
18
7V
D96AU458
VBAT
+
REFERENCE
-
19
7V
D96AU459
11/15
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet TDA7278.PDF ] | |
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