STMicroelectronics TDA7375H, TDA7375V Schematic [ru]
TDA7375
2 x 35WDUAL/QUAD POWER AMPLIFIER FOR CAR RADIO
HIGHOUTPUTPOWER CAPABILITY:
2 x40Wmax./4Ω
2 x35W/4ΩEIAJ
2 x35W/4ΩEIAJ
2
x 25W/4Ω @14.4V,1KHz,10%
4
x 7W/4Ω @14.4V,1KHz,10%
x 12W/2Ω @14.4V, 1KHz,10%
4
MINIMUM EXTERNAL COMPONENTS
COUNT:
– NOBOOTSTRAPCAPACITORS
– NOBOUCHEROTCELLS
– INTERNALLY FIXEDGAIN (26dBBTL)
ST-BYFUNCTION(CMOSCOMPATIBLE)
NOAUD IBLEPOPDURINGST-BYOPERATIONS
DIAGNOSTICSFACILITYFOR:
– CLIPPING
– OUTTO GND SHORT
– OUTTO V
SHORT
S
– SOFTSHORTAT TURN-ON
– THERMAL SHUTDOWNPROXIMITY
Protections:
OUPUTAC/DC SHORT CIRCUIT
BLOCK DIAGRAM
MULTIWATT15V MULTIWATT15H
TDA7375V TDA7375H
ORDERING NUMBERS:
–TOGND
–TOV
S
– ACROSS THE LOAD
SOFTSHORT AT TURN-ON
OVERRATING CHIP TEMPERATURE WITH
SOFTTHERMAL LIMITER
LOADDUMP VOLTAGESURGE
VERYINDUCTIVELOADS
FORTUITOUSOPEN GND
REVERSEDBATTERY
ESD
September 1998
DIAGNOSTICS
1/15
TDA7375
DESCRIPTION
The TDA7375 is a new technology class AB car
radio amplifier able to work either in DUAL
BRIDGEor QUADSINGLE ENDED configuration.
The exclusive fully complementarystructureof the
output stage and the internally fixed gain guaran-
tees the highest possible power performances
with extremely reduced component count. The
on-boardclip detectorsimplifies gain compression
operation. The fault diagnosticsmakes it possible
to detect mistakes during car radio set assembly
and wiring in thecar.
GENERALSTRUCTURE
ABSOLUTEMAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
P
T
stg,Tj
op
peak
I
O
I
O
tot
Operating Supply Voltage 18 V
DC Supply Voltage 28 V
S
Peak Supply Voltage(for t = 50ms) 50 V
Output Peak Current (notrepetitive t = 100µs) 4.5 A
Output Peak Current (repetitivef > 10Hz) 3.5 A
Power Dissipation (T
Storage and Junction Temperature -40 to 150 °C
=85°C) 36 W
case
THERMAL DATA
Symbol Description Value Unit
R
th j-case
Thermal Resistance Junction-case Max 1.8 °C/W
PIN CONNECTION (Topview)
DIAGNOSTICS
2/15
TDA7375
ELECTRICALCHARACTERISTICS
T
=25°C,unless otherwise specified
amb
(Referto thetest circuit, V
=14.4V;RL=4Ω; f =1KHz;
S
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
I
d
V
OS
P
O
P
O max
P
O EIAJ
THD Distortion R
CT Cross Talk f = 1KHz Single Ended
R
IN
G
V
G
V
E
IN
Supply Voltage Range 8 18 V
Total Quiescent DrainCurrent RL= ∞ 150 mA
Output Offset Voltage 150 mV
Output Power THD = 10%; RL=4
Bridge
Single Ended
Single Ended, R
Ω
23
6.5
=2
Ω
L
25
7
12
Max. Output Power (***) VS = 14.4V,Bridge 36 40 W
EIAJ Output Power (***) VS= 13.7V, Bridge 32 35 W
=4Ω
L
Single Ended, P
Bridge, P
O
= 0.1 to 4W
O
= 0.1 to10W
0.02
0.03 0.3
70
f = 10KHzSingle Ended
f = 1KHz Bridge
f = 10KHzBridge
Input Impedance Single Ended
Bridge
Voltage Gain Single Ended
Bridge
55
20
10
19
25
60
60
30
15
20
26
21
27
Voltage Gain Match 0.5 dB
Input Noise Voltage Rg= 0; ”A”weighted, S.E.
Non Inverting Channels
Inverting Channels
2
5
Bridge
Rg = 0;22Hz to 22KHz 3.5 µV
SVR Supply Voltage Rejection R
A
I
V
V
I
SB
SB
SB
SB
pin7
Stand-by Attenuation PO=1W 80 90 dB
ST-BY Current Consumption V
ST-BY In ThresholdVoltage 1.5 V
ST-BY Out ThresholdVoltage 3.5 V
ST-BY Pin Current Play ModeV
= 0; f = 300Hz 50 dB
g
= 0 to1.5V 100
ST-BY
=5V 50 µA
pin7
Max Driving Current Under
5mA
Fault (*)
I
cd off
Clipping Detector
d = 1%(**) 90
Output Average Current
I
cd on
Clipping Detector
d = 5%(**) 160 µA
Output Average Current
V
sat pin10
(*) See built-in S/C protection description
(**) Pin 10 Pulled-up to 5V with 10KΩ;R
(***) Saturatedsquare waveoutput.
Voltage Saturation on pin10 Sink Currentat Pin 10= 1mA 0.7 V
=4Ω
L
W
W
W
%
%
dB
dB
dB
dB
K
KΩ
dB
dB
µV
µV
µ
µ
Ω
A
A
3/15
TDA7375
STANDARD TEST AND APPLICATION CIRCUIT
Figure 1: Quad Stereo
Note:
C9, C10, C11, C12 could be
reduced if the2Ωoperation is not
required.
Figure 2:
Double Bridge
IN FL
ST-BY
10K R1
C1 0.22µF
C2 0.22µF
C4 0.22µF
C3 0.22µF
C8 47µF
10K R1
C7
10µF
ST-BY
IN FR 5
IN RR 11
IN L
C1 0.47µF
C2 0.47µF
C8 47µF
100nF
7
13
4
12IN RL
6
89 10
3
15
14
DIAGNOSTICS
C5
10µF
7
4
13
5
12IN R
11
6
89 10
DIAGNOSTICS
C6
1
2
100nF
3
C10 2200µF
C9 2200µF
C11 2200µF
C12 2200µF
D94AU063A
C4
1
2
15
14
V
S
C5
1000µF
OUT L
OUT R
D94AU064A
OUT FL
OUT FR
OUT RL
OUT RR
V
C3
1000µF
S
Figure 3:
4/15
Stereo/Bridge
IN BRIDGE 12
ST-BY
IN L
IN L
10K
0.22µF
0.22µF
0.47µF
47µF
10µF
13
7
4
3
5
11
6
89 10
DIAGNOSTICS
15
14
V
S
1000µF100nF
1
2200µF
2
2200µF
OUT L
OUT R
OUT
BRIDGE
D94AU065A
TDA7375
Figure 4:
Figure 5:
P.C.Board andComponentLayout of the fig.1(1:1 scale).
P.C.Board andComponentLayout of the fig.2(1:1 scale).
5/15
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