tda7375, Ham- CB Radio, Karty katalogowe
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TDA7375
QUAD POWER AMPLIFIER FOR CAR RADIO
ADVANCE DATA
HIGH OUTPUT POWER CAPABILITY
2
x
25W/4
W
@14.4V, 1KHz, 10%
4
x
7W/4
W
@14.4V, 1KHz, 10%
4
x
12W/2
W
@14.4V, 1KHz, 10%
MINIMUM
EXTERNAL
COMPONENTS
COUNT:
– NO BOOTSTRAP CAPACITORS
– NO BOUCHEROT CELLS
– INTERNALLY FIXED GAIN (26dB BTL)
ST-BY FUNCTION (CMOS COMPATIBLE)
NO AUDIBLE POP DURING ST-BY OPERA-
TIONS
DIAGNOSTICS FACILITY FOR:
– CLIPPING
– OUT TO GND SHORT
– OUT TO V
S
SHORT
– SOFT SHORT AT TURN-ON
– THERMAL SHUTDOWN PROXIMITY
MULTIWAT T15
ORDERING NUMBERS:
TDA7375V
TDA7375H
–TOV
S
– ACROSS THE LOAD
SOFT SHORT AT TURN-ON
OVERRATING CHIP TEMPERATURE WITH
SOFT THERMAL LIMITER
LOAD DUMP VOLTAGE SURGE
VERY INDUCTIVE LOADS
FORTUITOUS OPEN GND
REVERSED BATTERY
ESD
Protections:
OUPUT AC/DC SHORT CIRCUIT
– TO GND
BLOCK DIAGRAM
DIAGNOSTICS
May 1995
1/14
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
TDA7375
DESCRIPTION
The TDA7375 is a new technology class AB car
radio amplifier able to work either in DUAL
BRIDGE or QUAD SINGLE ENDED configura-
tion.
The exclusive fully complementary structure of
the output stage and the internally fixed gain
guarantees the highest possible power perform-
ances with extremely reduced component count.
The on-board clip detector simplifies gain com-
pression operation. The fault diagnostics makes it
possible to detect mistakes during car radio set
assembly and wiring in the car.
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)
50
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
=85
°
C)
36
W
T
stg
,T
j
Storage and Junction Temperature
-40 to 150
°
C
THERMAL DATA
Symbol
Description
Value
Unit
R
th j-case
Thermal Resistance Junction-case
Max
1.8
°
C/W
PIN CONNECTION
(Top view)
DIAGNOSTIC S
2/14
TDA7375
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 Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage Range
8
18
V
I
d
Total Quiescent Drain Current
R
L
=
8
150
mA
V
OS
Output Offset Voltage
150
mV
P
O
Output Power
(each channel)
d = 10%; R
L
=4
W
20
6.5
25
7
12
W
W
W
Bridge
Single Ended
R
L
=2
W
d
Distortion
W
Single Ended, P
O
= 0.1 to 4W
Bridge, P
O
= 0.1 to 10W
0.02
0.03
%
%
0.3
CT
Cross Talk
f = 1KHz Single Ended
f = 10KHz Single Ended
70
60
dB
dB
f = 1KHz Bridge
f = 10KHz Bridge
55
dB
dB
60
R
IN
Input Impedance
Single Ended
Bridge
20
10
30
15
W
K
W
G
V
Voltage Gain
Single Ended
Bridge
19
25
20
26
21
27
dB
dB
G
V
Voltage Gain Match
0.5
dB
E
IN
Input Noise Voltage
R
g
= 0; ”A” weighted
Non Inverting Channels
Inverting Channels
2
5
m
V
m
V
Bridge
Rg = 0; 22Hz to 22KHz
3.5
m
V
SVR
Supply Voltage Rejection
R
g
= 0; f = 300Hz
50
dB
A
SB
Stand-by Attenuation
P
O
=1W
80
dB
I
SB
ST-BY Current Consumption
V
ST-BY
= 0 to 1.5V
100
m
A
V
SB
ST-BY In Threshold Voltage
1.5
V
V
SB
ST-BY Out Threshold Voltage
3.5
V
I
pin7
ST-BY Pin Current
Play Mode V
pin7
=5V
50
m
A
Max Driving Current Under
Fault (**)
5
A
I
cd of f
Clipping Detector
Output Average Current
d = 1% (**)
90
m
A
I
cd on
Clipping Detector
Output Average Current
d = 5% (**)
160
m
A
V
sat pin10
Voltage Saturation on pin 10
Sink Current at Pin 10 = 1mA
0.7
V
(**) Pin 10 Pulled-up to 5V with 10K
W
;R
L
=4
W
(***) See built-in S/C protection description
3/14
R
L
=4
K
TDA7375
STANDARD TEST AND APPLICATION CIRCUIT
Figure 1:
Quad Stereo
ST-BY
10K R1
V
S
C7
10
C6
100nF
C5
1000
m
F
m
F
IN FL
4
7
13
3
1
C1 0.22
m
F
C10 2200
m
F
OUT FL
IN FR
5
2
C2 0.22
m
F
C9 2200
m
F
OUT FR
IN RL
12
C4 0.22
m
F
15
IN RR
11
C11 2200
m
F
OUT RL
Note:
C9, C10, C11, C12 coul d be
reduced if the 2
C3 0.22
m
F
14
W
operation is not
6
8
9
10
C12 2200
m
F
OUT RR
required.
C8 47
m
F
DIAGNOSTICS
D94AU063A
Figure 2:
Double Bridge
ST-BY
10K R1
V
S
C5
10
C4
100nF
C3
1000
m
F
m
F
IN L
4
7
13
3
1
C1 0.47
m
F
5
OUT L
IN R
12
2
15
C2 0.47
m
F
11
OUT R
6
14
C8 47
m
F
8
9
10
DIAGNOSTICS
D94AU064A
Figure 3:
Stereo/Bridge
ST-BY
10K
V
S
10
m
F
100nF
1000
m
F
IN L
4
7
13
3
1
OUT L
0.22
m
F
2200
m
F
IN L
5
2
OUT R
0.22
m
F
2200
m
F
IN BRIDGE
12
15
0.47
m
F
11
OUT
BRIDGE
6
8
9
10
14
47
m
F
DIAGNOSTICS
D94AU065A
4/14
TDA7375
Figure 4:
P.C. Board and Component Layout of the fig.1 (1:1 scale).
Figure 5:
P.C. Board and Component Layout of the fig.2 (1:1 scale).
5/14
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