tda7396, Ham- CB Radio, Karty katalogowe
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TDA7396
45W BRIDGE CAR RADIO AMPLIFIER
WITH DIAGNOSTIC FACILITY
@V
S
= 14.4V, f = 1KHz, d = 10%
DIFFERENTIAL INPUTS (EITHER SINGLE
ENDED OR DIFFERENTIAL INPUT SIGNALS
ARE ACCEPTED)
MINIMUM EXTERNAL COMPONENT COUNT:
- NO BOOTSTRAP CAPACITORS
- NO BOUCHEROT CELLS
- INTERNALLY FIXED GAIN (26dB)
- NO SVR CAPACITOR
ST.-BY FUNCTION (CMOS COMPATIBLE)
AUTOMATIC MUTE DURING TURN-ON/OFF
AUTOMUTE AT MINIMUM SUPPLY
VOLTAGE DETECTION
SYNCHRONIZING PIN FOR SIMULTANEOUS
TURN-ON IN MULTI-DEVICE APPLICATIONS
NO AUDIBLE POP DURING MUTE AND ST-
BY OPERATIONS
W
Multiwatt11
ORDERING NUMBER:
TDA7396
OPEN LOAD
THERMAL SHUTDOWN
PROTECTIONS:
SHORT CIRCUIT (TO GND, TO V
S,
ACROSS
THE LOAD)
VERY INDUCTIVE LOADS
CHIP OVER-TEMPERATURE
LOAD DUMP
OPEN GND
ESD
Diagnostic Facilities:
CLIPPING DETECTOR
SHORT CIRCUIT
Figure 1:
Test And Application Circuit
+V
S
0.22
m
100nF
1000
m
F
IN+
2
3
9
OUT+
7
0.22
m
IN-
1
TDA7396
OUT-
5
Vref
STANDBY
TO
CorV
S
8
10K
W
CD-DIA
4
TO
C
11
10
6
RS
51K
GND
CM
10
m
F
W
D93AU004
April 1995
1/11
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
HIGH POWER CAPABILITY:
- 60W/2
W
EIAJ
- 45W/2
F
F
m
m
TDA7396
DESCRIPTION
The TDA7396 is a BRIDGE class AB audio power
amplifier especially intended for car radio High
Power applications.
The 2
W
power capability together with the possi-
bility to operate either in DIFFERENTIAL INPUT
MODE or SINGLE ENDED INPUT MODE makes
it suitable for boosters and high end car radio ap-
plications.
The exclusive fully complementary output stage
and the internally fixed gain configuration drop the
external component count.
The on board clipping detector allows easy imple-
mentation of gain compression systems.
The diagnostics facility allows to detect any mis-
takes during car radio set assembly and wiring in
the car.
Figure 2:
Block Diagram
V
CC1
V
CC2
3
9
+
-
REFERENCES
SHORT CIRCUIT
DUMP & THERMAL
PROTECTION
STANDBY THRESHOLD
10K
1
IN-
5
OUT-
POWER AMP
500
W
COMMON
MODE
ICM
-
+
LTS
V=f
(Tj)
LTS
DISABLE
4
DIAGN
CD
500
W
V
CC/2
-
+
gm
POWER AMP
7
2
OUT+
IN+
10K
THD
DETECT
+
-
PROGRAMMABLE
CURRENT CIRCUIT
DIAGNOSTIC
CIRCUIT
MUTE THRESHOLD
11
10
6
8
MUTE
SYNC
GND
STANDBY
D94AU107
PIN CONNECTION
(Top view)
11
MUTE
SYNC
+V
S
STAND-BY
OUT+
GND
OUT-
CD-DIA (CLIPPING DETECTOR - DIAG.)
+V
S
IN+
IN-
10
9
8
7
6
5
4
3
2
1
TAB CONNECTED TO PIN 6
D93AU003A
THERMAL DATA
Symbol
Description
Value
Unit
R
th j-case
Thermal Resistance Junction-case
Max
1.5
°
C/W
2/11
TDA7396
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
DC Supply Voltage
28
V
V
OP
Operating Supply Voltage
18
V
V
PEAK
Peak Supply Voltage (t = 50ms)
50
V
I
O
Output Peak Current repetitive (f > 10Hz)
Output Peak Current non repetitive
6
7
A
A
P
tot
Power Dissipation (T
CASE
=85
°
C)
43
W
T
stg
,T
j
Storage and Junction-Case
-40 to 150
°
C
ELECTRICAL CHARACTERISTICS
(V
S
= 14.4V; R
L
=2
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
q
Total Quiescent Current
100
mA
V
OS
Output Offset Voltage
150
mV
I
SB
ST-BY Current
V
ST-BY
= 1.5V
100
m
A
I
SBin
ST-BY Input Bias Current
V
ST-BY
=5V
10
m
A
V
SBon
ST-BY On Threshold Voltage
1.5
V
V
SBoff
ST-BY Off threshold Voltage
3.5
V
ATT
ST-BY
ST-BY Attenuation
90
dB
R
EXT
/R
S
Mute Resistor Ratio for External
Mute Control
(see Application Circuit of fig. 4) 0.63
0.69
V
I
Min
Mute Input Bias Current
V
MUTE
=5V
10
m
A
A
M
Mute Attenuation
90
dB
P
O
RMS Output Power
d = 10%
d=1%
d = 10%; R
L
=4
45
35
27
W
W
W
W
EIAJ Output Power
V
S
= 13.7V
60
W
d
Distortion
P
O
= 0.1 to 20W
P
O
= 0.1 to 15W; R
L
=4
W
0.06
0.03
%
%
G
V
Voltage Gain
25
26
27
dB
f
H
High Frequency rolloff
P
O
= 1W; -3dB
75
KHz
R
IN
Input Impedance
Differential
60
K
W
Single Ended
55
K
W
E
IN
Input Noise Voltage
R
g
=0
W
;f=
22Hz to 22KHz
4
mV
CMRR
Input Common Mode Rejection
f = 1KHz; V
IN
= 1Vrms
70
dB
SVR
Supply Voltage Rejection
R
g
=0
W
;V
r
= 1Vrms
60
dB
CDL
Clipping Detection Level
0.5
%
T
sd
Absolute Thermal Shutdown
Junction Temperature
160
dB
3/11
TDA7396
FUNCTIONAL DESCRIPTION
Pin
Function
Description
1, 2
INPUTS
The input stage is a high impedance differential type also capable of operation in single
ended mode with one input capacitively coupled to the signal GND. the impedance seen
by the inverting and non inverting input pins must be matched.
4
CD - DIA
The TDA7396 is equipped with a diagnostics circuitry able to detect the following events:
- Clipping in the Output Signal
- Thermal Shutdown
- Open Load (before turn-on)
- Shorted Output: to GND, to Vs, across the load (after turn-on)
The CD-DIA(open collector) pin gives out the diagnostics signal (low during clipping or
output fault condition).
The device does not work as long as the faulty condition holds; the normal operation is
automatically restored after the fault removal.
.
It consists of two class AB fully complementary PNP/NPN stages fully protected.
A rail to rail output voltage swing is achieved with no need of bootstrap capacitors.
No external compensation is necessary.
W
5, 7
OUTPUTS
8
STAND-BY
The device features a ST-BY function which shuts down all the internal bias supplies
when the ST-BY input is low.
In ST-BY mode the amplifier sinks a small current (in the range of few
m
A).
When the ST-BY pin is high the IC becomes fully operational.
10
SYNC
A resistor (R
S
) has to be connect between pin 10 and GND in order to program the
current that flows into C
M
capacitor (pin 11). The values of C
M
and R
S
determine the time
required to bias the amplifier.
11
MUTE
a) The pin will have a capacitor (C
M
) tied to GND to set the MUTE/STAND-BY time. An
automatic Mute during turn on/off is provided to prevent noisy transients
b) If a independent Mute function is needed, an external transistor circuit (see fig. 4) may
be connected to this pin; 1% precision resistors have to be used for R
EXT
/R
S
in to order
to reach the fixed limits 0.63
3
R
EXT
/R
S
3
0.69
Figure 3:
Application Circuit with External Mute Control
+V
S
0.22
m
F
100nF
1000
m
F
IN+
2
3
9
OUT+
7
0.22
m
F
IN-
1
TDA7396
OUT-
5
Vref
STANDBY
TO
m
CorV
S
8
10K
W
CD-DIA
4
TO
m
C
11
10
6
REXT
GND
TO
m
C
CM
RS
D93AU007
4/11
The output stage is a bridge type able to drive loads as high as 2
TDA7396
Figure 4:
Quiescent Current vs Supply Voltage
Figure 5:
EIAJ power vs Supply Voltage
R
L
=2
W
R
L
=4
Figure 6:
Output Power vs Supply Voltage (R
L
=2
W
)
Figure 7:
Distortion vs Frequency (R
L
=2
W
)
W
f = 1KHz
V
S
= 14.4V
R
L
=2
f (Hz)
Figure 8:
Output Power vs Supply Voltage (R
L
=4
W
)
Figure 9:
Distortion vs Frequency (R
L
=4
W
)
W
f = 1KHz
V
S
= 14.4V
R
L
=4
f (Hz)
5/11
W
R
L
=2
W
P
O
= 18W
W
P
O
= 15W
R
L
=4
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