TDA7375A
2 X 37W DUAL/QUAD POWER AMPLIFIER FOR CAR RADIO
1
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FEATURES
HIGH OUTPUT POWER CAPABILITY:
– 2 x 43W max./4Ω
– 2 x 37W/4Ω EIAJ
– 2 x 26W/4Ω @14.4V, 1KHz, 10%
– 4 x 7W/4Ω @14.4V,1KHz, 10%
– 4 x 12W/2Ω @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
OPERATIONS
DIAGNOSTICS FACILITY FOR:
–
–
–
–
–
CLIPPING
OUT TO GND SHORT
OUT TO V
S
SHORT
SOFT SHORT AT TURN-ON
THERMAL SHUTDOWN PROXIMITY
Figure 1. Package
MULTIWATT15
Table 1. Order Codes
Part Number
TDA7375AV
Package
MULTIWATT 15 (Vertical)
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2
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PROTECTIONS:
OUPUT AC/DC SHORT CIRCUIT
– TO GND
– TO V
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
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Figure 2. Block Diagram
March 2005
Rev. 2
1/15
TDA7375A
3
DESCRIPTION
The TDA7375A is a new technology class AB car radio amplifier able to work either in DUAL BRIDGE or
QUAD SINGLE ENDED configuration.
The exclusive fully complementary structure of the output stage and the internally fixed gain guarantee the
highest possible power performances with extremely reduced component count.
The on-board clip detector simplifies gain compression operation. The fault diagnostics makes it possible
to detect mistakes during car radio set assembly and wiring in the car.
Table 2. Absolute Maximum Ratings
Symbol
V
op
V
S
V
peak
I
O
I
O
P
tot
T
stg
, T
j
Parameter
Operating Supply Voltage
DC Supply Voltage
Peak Supply Voltage (for t = 50ms)
Output Peak Current (not repetitive t = 100µs)
Output Peak Current (repetitive f > 10Hz)
Power Dissipation (T
case
= 85°C)
Storage and Junction Temperature
Value
18
28
40
4.5
3.5
36
-40 to 150
Unit
V
V
V
A
A
W
°C
Table 3. Thermal Data
Symbol
R
th j-case
Parameter
Thermal Resistance Junction-case
max
Value
1.8
Unit
°C/W
Figure 3. Pin Connection (Top view)
2/15
TDA7375A
Table 4. Electrical Characteristcs
(Refer to the test circuit, V
S
= 14.4V; R
L
= 4Ω; f = 1KHz; T
amb
= 25°C,
unless otherwise specified)
Symbol
V
S
I
d
V
OS
P
O
Parameter
Supply Voltage Range
Total Quiescent Drain Current
Output Offset Voltage
Output Power
THD = 10%; R
L
= 4Ω
Bridge
Single Ended
Single Ended, R
L
= 2Ω
V
S
= 14.4V, Bridge
V
S
= 13.7V, Bridge
R
L
= 4Ω
Single Ended, P
O
= 0.1 to 4W
Bridge, P
O
= 0.1 to 10W
f = 1KHz Single Ended
f = 10KHz Single Ended
f = 1KHz Bridge
f = 10KHz Bridge
R
IN
G
V
G
V
E
IN
Input Impedance
Single Ended
Bridge
Voltage Gain
Single Ended
Bridge
Voltage Gain Match
Input Noise Voltage
R
g
= 0; ”A” weighted, S.E.
Non Inverting Channels
Inverting Channels
Bridge
Rg = 0; 22Hz to 22KHz
SVR
A
SB
I
SB
V
SB
V
SB
I
pin7
Supply Voltage Rejection
Stand-by Attenuation
ST-BY Current Consumption
ST-BY In Threshold Voltage
ST-BY Out Threshold Voltage
ST-BY Pin Current
Play Mode V
pin7
= 5V
Max Driving Curr. Under Fault (*)
I
cd
Test Condition
R
L
=
∞
Min.
8
Typ.
Max.
18
150
150
Unit
V
mA
mV
W
W
W
W
W
%
%
dB
dB
dB
23
6.5
37
33
25
7
12
43
37
0.02
0.03
70
60
P
O
max
P
O EIAJ
THD
Max. Output Power (***)
EIAJ Output Power (***)
Distortion
0.3
CT
Cross Talk
55
60
20
10
19
25
30
15
20
26
21
27
0.5
2
5
3.5
50
80
90
100
1.5
3.5
50
5
90
160
0.7
dB
KΩ
KΩ
dB
dB
dB
µV
µV
µV
dB
dB
µA
V
V
µA
mA
µA
µA
V
R
g
= 0; f = 300Hz
P
O
= 1W
V
ST-BY
= 0 to 1.5V
off
Clipping Detector Output
Average Current
Clipping Detector Output
Average Current
Voltage Saturation on pin 10
d = 1% (**)
d = 5% (**)
Sink Current at Pin 10 = 1mA
I
cd on
V
sat pin10
(*) See built-in S/C protection description
(**) Pin 10 Pulled-up to 5V with 10KΩ; R
L
= 4Ω
(***) Saturated square wave output.
3/15
TDA7375A
4
STANDARD TEST AND APPLICATION CIRCUIT
Figure 4. Quad Stereo
10K R1
ST-BY
C7
10µF
IN FL
C1 0.22µF
IN FR
C2 0.22µF
IN RL
C4 0.22µF
IN RR
11
C3 0.22µF
6
C8 47µF
8
9
14
10
C12 2200µF
D94AU063A
C6
100nF
7
13
3
1
VS
C5
1000µF
4
C10 2200µF
5
2
C9 2200µF
15
C11 2200µF
OUT FL
12
OUT FR
OUT RL
Note:
The output decoupling capacitors
(C9,C10,C11,C12) could be reduced
to 1000µF if the 2Ω operation is not
required.
OUT RR
DIAGNOSTICS
Figure 5. Double Bridge
10K R1
ST-BY
C5
10µF
IN L
C1 0.47µF
IN R
C2 0.47µF
4
5
12
11
6
C8 47µF
8
9
10
DIAGNOSTICS
D94AU064A
C4
100nF
7
13
3
1
VS
C3
1000µF
OUT L
2
15
OUT R
14
Figure 6. Stereo/Bridge
10K
ST-BY
10µF
7
13
3
100nF
VS
1000µF
IN L
0.22µF
IN L
0.22µF
IN BRIDGE
0.47µF
4
1
2200µF
OUT L
5
2
2200µF
OUT R
12
11
6
47µF
8
9
10
15
OUT
BRIDGE
14
DIAGNOSTICS
D94AU065A
4/15
TDA7375A
Figure 7. P.C. Board and Component Layout of the fig.4
Figure 8. P.C. Board and Component Layout of the fig.5
5/15
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