TDA7370B
QUAD POWER AMPLIFIER FOR CAR RADIO
MINIMUM EXTERNAL COMPONENT COUNT
HIGH CURRENT CAPABILITY
NO BOOTSTRAP CAPACITORS
NO BOUCHEROT CELLS
CLIP DETECTOR OUTPUT
HIGH OUTPUT POWER
HIGH APPLICATION FLEXIBILITY
FIXED GAIN
VERY LOW STAND-BY CURRENT (1
A typ)
NO SWITCH ON/OFF NOISE
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 TDA7370B is a new technology class AB
quad channels Audio 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 TDA7370B are obtained without bootstrap ca-
pacitors.
April 1995
BLOCK DIAGRAM
MULTIWA TT15V
ORDERING NUMBER: TDA7370B
1/17
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)
4.5
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
TDA7370B
2/17
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
R
L
=
150
mA
P
O
Output Power
R
L
= 4
; THD = 10%
Single Ended
Bridge
5.5
6.5
20
W
W
d
Distortion
R
L
= 4
;
Single Ended, P
O
= 0.1 to 4W
Bridge, P
O
= 0.1 to 10W
0.03
0.5
%
%
CT
Cross Talk
f = 1kHz Bridge
f = 10kHz Bridge
f = 1kHz Single Ended
f = 10kHz Single Ended
65
55
60
50
dB
dB
dB
dB
R
IN
Input Impedance
Single Ended
Bridge
20
15
K
K
G
V
Voltage Gain
Single Ended
Bridge
20
26
dB
dB
G
V
Voltage Gain Match.
1
dB
E
IN
Input Noise Voltage (*)
SINGLE ENDED
Non Inv. Ch., R
g
= 10k
Inv. Ch., R
g
= 10k
BRIDGE (R
g
= 0 to 10k
)
3.0
5
3.5
V
V
V
SVR
Supply Voltage Rejection
R
g
= 0; f = 100Hz to 10kHz
50
dB
ASB
Stand-by Attenuation
60
dB
I
SB
ST-BY Current
1
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
A
I
CD ON
Clipping Detector "ON"
Output Average Current
THD = 10% (**)
190
A
(*) Weighted A
(**) Pin 10 Pulled-up to 5V with 10k
;
TDA7370B
3/17
APPLICATION CIRCUIT (QUAD STEREO)
QUAD STEREO P.C. BOARD AND COMPONENT LAYOUT (1:1 SCALE)
B
TDA7370B
4/17
APPLICATION CIRCUIT (DOUBLE BRIDGE)
DOUBLE BRIDGE P.C. BOARD AND COMPONENT LAYOUT (1:1 SCALE)
B
TDA7370B
5/17
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