TDA7374B.PDF

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DUAL BRIDGE AUDIO AMPLIFIER FOR CAR RADIO
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
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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
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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
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TDA7374B
TEST AND APPLICATION CIRCUIT
P.C. BOARD AND COMPONENT LAYOUT (1:1 scale)
B
4/13
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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
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