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PDF TDA7454 Data sheet ( Hoja de datos )
| Número de pieza | TDA7454 | |
| Descripción | 4 x 35W HIGH EFFICIENCY QUAD BRIDGE CAR RADIO AMPLIFIER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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TDA7454
4 x 35W HIGH EFFICIENCY QUAD BRIDGE
CAR RADIO AMPLIFIER
HIGH OUTPUT POWER CAPABILITY:
4 x 40W/4Ω MAX.
4 x 35W/4Ω EIAJ.
4 x 25W/4Ω @14.4V, 1KHz, 10%
4 x 60W/2Ω MAX.
2Ω DRIVING CAPABILITY
DUAL MODE OPERATING EXTERNALLY
PRESETTABLE: CONVENTIONAL CLASS A-
B MODE, HIGH EFFICIENCY MODE
LOW EXTERNAL COMPONENTS COUNT:
– NO BOOTSTRAP CAPACITORS
– NO EXTERNAL COMPENSATION
– INTERNALLY FIXED GAIN (26dB)
CLIPPING DETECTOR
ST-BY FUNCTION (CMOS COMPATIBLE)
MUTE FUNCTION (CMOS COMPATIBLE)
AUTOMUTE AT MINIMUM SUPPLY
VOLTAGE DETECTION
LOW RADIATION
Protections:
OUPUT SHORT CIRCUIT
TO GND; TO VS; ACROSS THE LOAD
3 STEPS OVERRATING CHIP TEMPERA-
TURE WITH THERMAL WARNING
LOAD DUMP VOLTAGE
FORTUITOUS OPEN GND
BLOCK & APPLICATION DIAGRAM
September 2013
STD/HI- EFF
IN RIGHT
FRONT
0.22µF
16
11
ST-BY
IN RIGHT
REAR
0.22µF
4
12
MUTE
IN LEFT
FRONT
IN LEFT
REAR
CD
0.22µF
22
15
100µF
SVR
10
0.22µF
14
25
MULTIPOWER BCD TECHNOLOGY
Flexiwatt 25
LOUDSPEAKER DC CURRENT
ESD
DESCRIPTION
The TDA7454 is a new BCD technology QUAD
BRIDGE type of car radio amplifier in Flexiwatt25
package specially intended for car radio applications.
Among the features, its superior efficiency per-
formance coming from the internal exclusive
structure, makes it the most suitable device to
simplify the thermal management in high power
sets. The dissipated output power under average
listening condition is in fact reduced up to 50%
when compared to the level provided by conven-
tional class AB solutions.
6 VCC1
20
7 VCC2 -
VCC
8 RIGHT FRONT
9+
S-GND
13
5+
2 RIGHT REAR
3-
19 -
18 LEFT FRONT
17 +
TAB
1
21 +
24 LEFT REAR
23 -
D94AU172C
1/13
1 page  
Figure 2: P.C.B. and components layout of fig. 1 circuit. (1.25 :1 scale)
COMPONENTS &
TOP COPPER LAYER
TDA7454
BOTTOM COPPER LAYER
5/13
5 Page 
Figure 18: Power Dissipation (Sine-Wave)
Pdiss (W)
55
50
45 Vs = 14.4 V
40 RL = 4 x 4 Ohm
35 CLASS-AB
30
25
20
15
10
5 TDA7454
0
0.1
1
Po each channel (W)
10
TDA7454
Figure 19: Power Dissipation (Gaussian Signals)
Pdiss (W)
45
40
35
Vs = 14.4 V
30 RL = 4 x 4 Ohm
CLASS-AB
25
20
15
10
TDA7454
5
0
0.1
1
Pout each channel (W)
10
11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TDA7454.PDF ] | |
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