tda7374b, Ham- CB Radio, Karty katalogowe
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TDA7374B
DUAL BRIDGE AUDIO AMPLIFIER FOR CAR RADIO
MINIMUM EXTERNAL COMPONENT COUNT
NO BOOTSTRAP CAPACITORS
NO BOUCHEROT CELLS
CLIP DETECTOR OUTPUT
HIGH OUTPUT POWER
FIXED GAIN
VERY LOW STAND-BY CURRENT (1
m
A typ)
NO SWITCH ON/OFF NOISE
MULTIWATT 15
ORDERING NUMBERS:
TDA7374BV
PROTECTIONS:
OUTPUT AC/DC SHORT CIRCUIT TO GND
AND TO V
S
VERY INDUCTIVE LOADS
OVERRATING CHIP TEMPERATURE
LOAD DUMP VOLTAGE
FORTUITOUS OPEN GND
REVERSE BATTERY
ESD
DESCRIPTION
The TDA7374B is a new technology class AB
Audio Dual Bridge Power Amplifier in Multiwatt
package designed for car radio applications.
Thanks to the fully complementary PNP/NPN out-
put configuration the high power performances of
the TDA7374B are obtained without bootstrap ca-
pacitors.
TEST AND APPLICATION CIRCUIT
April 1995
1/13
TDA7374B
PIN CONNECTION
(Top view)
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 (not rep. t = 100
m
s)
4.5
A
I
O
Output Peak Current (rep. 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
2/13
TDA7374B
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit; V
S
= 14.4V; R
L
=4
W
,T
amb
=25
°
C,
f = 1kHz, unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Range
8
18
V
I
d
Total Quiescent Drain Current
R
L
=
8
150
mA
P
O
Output Power
R
L
=4
W
; THD = 10%
17
21
W
d
Distortion
R
L
=4
W
P
O
= 0.1 to 10W
0.5
%
CT
Cross-Talk
f = 1kHz
f = 10kHz
65
55
dB
dB
R
IN
Input Impedance
10
K
W
G
V
Voltage Gain
26
dB
G
V
Voltage Gain Match.
1
dB
E
IN
Input Noise Voltage
R
g
= 0 to 10k
W
Weight A
22Hz to 22KHz
3.5
m
V
10
m
V
SVR
Supply Voltage Rejection
R
g
= 0; f = 100Hz
f = 10kHz
48
dB
55
ASB
Stand-by Attenuation
60
dB
I
SB
ST-BY Current
1
m
A
V
SB ON
ST-BY On Threshold Voltage
1.5
V
V
SB OFF
ST-BY Off Threshold Voltage
3.5
V
V
OS
Output Offset Voltage
200
mV
I
CD OFF
Clipping Detector ”OFF ”
Output Average Current
THD = 1% (*)
100
m
A
I
CD ON
Clipping Detector ”ON”
Output Average Current
THD = 10% (*)
190
m
A
(*) Pin 10 Pulled-up to 5V with 10k
W
;R
L
=4
W
3/13
TDA7374B
TEST AND APPLICATION CIRCUIT
P.C. BOARD AND COMPONENT LAYOUT (1:1 scale)
B
4/13
TDA7374B
Figure 1:
Quiescent Drain Current vs. Supply
Voltage
Figure 2:
Quiescent Output Voltage vs. Supply
Voltage
Figure 3:
Output Power vs. Supply Voltage
Figure 4:
Distortion vs. Output Power
Figure 5:
Output Power vs. Frequency
Figure 6:
Supply Voltage Rejection vs.
Frequency for a Different values of C6
Capacitor
R
g
5/13
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