TDA7372B
4 x 6W POWER AMPLIFIER FOR CAR RADIO
ADVANCE DATA
HIGH POWER CAPABILITY:
4x6W min/4
@14.4V, 1KHz, 10%
4x10W typ/2
@14.4V, 1KHz, 10%
MINIMUM EXTERNAL COMPONENT COUNT
- INTERNALLY FIXED GAIN (40dB)
- NO BOOTSTRAP CAPACITORS
- NO EXTERNAL COMPENSATION
ST-BY FUNCTION (CMOS COMPATIBLE)
MUTE FUNCTION (CMOS COMPATIBLE)
NO AUDIBLE POP DURING MUTE/ST-BY
OPERATIONS
LOW SUPPLY SELF MUTING
PROGRAMMABLE TURN ON DELAY
PROTECTIONS:
AC OUTPUT SHORT CIRCUIT TO GND
DC OUTPUT SHORT CIRCUIT TO GND AND
TO V
S
AT POWER ON
SOFT THERMAL LIMITER
OVERRATING CHIP TEMPERATURE
LOAD DUMP VOLTAGE
FORTUITOUS OPEN GND
REVERSE BATTERY
ESD PROTECTION
DESCRIPTION
The TDA7372B is a new technology class AB quad
channels Audio Power Amplifier in Multiwatt15
package designed for car radio applications.
Thanks to the fully complementary PNP/NPN out-
put configuration the TDA7372B delivers a rail to
rail voltage swing with no need of boostrap capacitors.
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
April 1995
BLOCK DIAGRAM
MULTIWATT15
ORDERING NUMBER: TDA7372B
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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
s)
4
A
I
O
Output Peak Current (rep. f > 10Hz)
3
A
P
tot
Power Dissipation (T
case
= 85
C)
32
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
2
C/W
TDA7372B
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ELECTRICAL CHARACTERISTICS (Refer to the test circuit; V
S
= 14.4V; R
L
= 4
, 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
150
mA
P
O
Output Power
R
L
= 4
; THD = 10%
each channel
6
6.5
W
R
L
= 2
; THD = 10%
each channel
10
W
d
Distortion
R
L
= 4
;
P
O
= 0.1 to 3W
0.08
0.5
%
CT
Cross Talk
f = 1kHz; R
g
= 0
f = 10kHz; R
g
= 0
45
50
40
dB
dB
R
IN
Input Impedance
35
K
G
V
Voltage Gain
40
dB
G
V
Voltage Gain Match.
1
dB
BW
Bandwidth
@ -3dB
75
KHz
E
NO
Output Noise Voltage (*)
R
g
= 0
300
V
SVR
Supply Voltage Rejection
R
g
= 0; f = 100Hz
45
dB
ASB
Stand-by Attenuation
80
dB
I
SB
ST-BY Current Consumption
Vpin7 = 1.5V
100
A
I
PIN 7
ST-BY Pin Current
Play mode; Vpin7 = 5V
50
A
Output Under Short (Max
driving current under fault)
5
mA
V
SB IN
ST-BY IN Threshold Voltage
1.5
V
V
SB OUT
ST-BY OUT Threshold Voltage
3.5
V
A
M
MUTE Attenuation
80
dB
V
M IN
MUTE IN Threshold Voltage
1.5
V
V
M OUT
MUTE OUT Threshold Voltage
3.5
V
(*) 22Hz to 22KHz
TDA7372B
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TEST AND APPLICATION CIRCUIT
Figure 1: P.C. Board and components layout of the Test and Application Circuit (1:1 scale)
If high source resistance is present (e.g. passive audio controls) it might be necessary to add C = 470pF from each input pin to S-GND to
prevent instability phenomena.
10
F
C13
R2
TDA7372B
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Figure 2: Quiescent Drain Current vs. Supply
Voltage
Figure 4: Output Power vs Supply Voltage
Figure 6: Distortion vs. Output Power
Figure 3: Output Power vs. Supply Voltage
Figure 5: Output power vs. Frequency vs.C
OUT
Value
Figure 7: Distortion vs. Output Power
TDA7372B
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