tda7454, Ham- CB Radio, Karty katalogowe
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TDA7454
HIGH EFFICIENCY QUAD BRIDGE CAR RADIO
POWER AMPLIFIER
PRODUCT PREVIEW
@14.4V, 1KHz, 10%
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 V
S
; ACROSS THE LOAD
3 STEPS OVERRATING CHIP TEMPERA-
TURE
LOAD DUMP VOLTAGE
FORTUITOUS OPEN GND
LOUDSPEAKER DC CURRENT
ESD
W
MULTIPOWER BCD TECHNOLOGY
Flexiwatt 25
DESCRIPTION
The TDA7454 is a new BCD technology QUAD
BRIDGE type of car radio amplifier in Flexiwatt25
package specially intended for car radio applica-
tions.
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.
BLOCK & APPLICATION DIAGRAM
6
V
CC1
STD/HI- EFF
16
20
V
CC
V
CC2
-
7
0.22
m
11
IN RIGHT
FRONT
8
RIGHT FRONT
9
+
S-GND
ST-BY
4
13
5
+
0.22
m
F
IN RIGHT
REAR
12
2
RIGHT REAR
3
-
MUTE
22
-
19
0.22
m
15
IN LEFT
FRONT
18
LEFT FRONT
100
m
F
17
+
SVR
TAB
10
1
21
+
0.22
m
F
14
IN LEFT
REAR
24
LEFT REAR
CD
25
23
-
D94AU172C
February 1996
1/9
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
HIGH OUTPUT POWER CAPABILITY
4 x 22W/4
F
F
TDA7454
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
op
Operating Supply Voltage
18
V
V
S
DC Supply Voltage
28
V
V
peak
Peak Supply Voltage (for t = 50ms)
40
V
I
O
Output Peak Current (not repetitive t = 100
m
s)
4.5
A
I
O
Output Peak Current (repetitive f > 10Hz)
3.5
A
P
tot
Power Dissipation T
case
=70
°
C
86
W
T
stg
,T
j
Storage and Junction Temperature
-55 to 150
C
THERMAL DATA
Symbol
Description
Value
Unit
R
th j-case
Thermal Resistance Junction-case
Max
1
°
C/W
PIN CONNECTION
(Top view)
25
CD
24
PW GND LR
23
OUT LR-
22
MUTE
OUT LR+
20
V
CC2
19
OUT LF-
18
PW GND LF
17
OUT LF+
16
STD/HEFF
15
IN LF
14
IN LR
13
S GND
12
IN RR
11
IN RF
10
SVR
9
OUT RF+
8
PW GND RF
7
OUT RF-
6
V
CC1
OUT RR+
4
ST-BY
3
OUT RR-
2
PW GND RR
1
TAB
D94AU173A
2/9
°
TDA7454
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit V
S
= 14.4V; R
L
=4
W
; f = 1KHz;
T
amb
=25
°
C, unless otherwise specified
Symbol
Parameter
Test Conditi on
Min.
Typ.
Max.
Unit
V
S
Supply Voltage Range
8
18
V
I
d
Total Quiescent Drain Current
140
mA
P
O
Output Power
@ EIAJ
30
W
THD = 10%
22
W
THD = 1% : BTL MODE
18
W
THD
Total harmonic distortion
P
O
= 1W : BTL MODE
P
O
= 10W : BTL MODE
0.03
0.03
%
%
P
O
= 1W : Hi-EFF MODE
P
O
= 10W : Hi-EFF MODE
0.03
0.3
%
%
C
T
Cross Talk
f = 1KHz
f = 10KHz
55
45
dB
dB
R
IN
Input Impedance
15
K
W
G
V
Voltage Gain
25
26
27
dB
D
G
V
Voltage Gain Match
1
dB
E
IN
Output Noise Voltage
R
g
= 600
W
100
mV
SVR
Supply Voltage Rejection
f = 300Hz; Vr = 1Vpp;
R
g
= 0 to 100
50
dB
W
;
BW
Power Bandwidth
(–3dB)
75
KHz
A
SB
Stand-by Attenuation
100
dB
V
sb IN
Stand-by in Threshold
1.5
V
V
sb OUT
Stand-by out Threshold
3.5
V
I
sb
Stand-by Current Consumption
100
m
A
A
M
Mute Attenuation
90
dB
V
MIN
Mute in Thereshold
1.5
V
V
M OUT
Mute out Threshold
3.5
V
I
M
Mute pin Current (Sourced)
V = 0 to V
S
V
S max
= 18V
1
m
A
Mode Select Switch
Standard BTL Mode Op. (V
pin 16
)
Open
High Efficiency Mode (V
pin 16
)
0.5
V
CD
Clip Det. out Current
(Pull up to 5V with 10K
CD off: P
Omin
= 10W
CD on: THD = 5%
5
m
A
W
)
150
m
A
3/9
TDA7454
Figure 1:
Standard Test and Application Circuit.
C8
0.1
m
F
C9
2200
m
F
Vcc1
Vcc2
R1
6
20
ST-BY
4
9
8
7
10K
C6
0.1
m
F
OUT RF
R2
MUTE
22
10K
C7
1
m
F
5
2
3
C1
OUT RR
IN RF
11
0.22
m
F
TDA7454
IN RR
12
17
18
19
C2 0.22
m
F
OUT LF
IN LF
15
C3 0.22
m
F
21
24
23
IN LR
14
OUT LR
C4 0.22
m
F
S-GND
13
16
10
25
1
SVR
TAB
(*)
SW1
C5
100
m
F
(*) OPEN = STANDARD BTL
CLOSED=HI-EFF BTL
D95AU416
CLIP DET
4/9
TDA7454
Figure 2:
P.C.B. and components layout of fig. 1 circuit. (1.25 :1 scale)
COMPONENTS &
TOP COPPER LAYER
BOTTOM COPPER LAYER
5/9
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