ST TDA7370B User Manual
®
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 CURRE NT (1µA typ)
NO SWITCH ON/OFF NOISE
PROTECTIONS:
OUTPUT AC/DC SHORT CIRCUIT TO GND
AND TO V
VERY INDUCTIV E LO ADS
OVERRATING CHIP TEMPERATURE
LOAD DUMP VOLTAGE
FORTUITOUS OPEN GND
REVERSE BATTERY
ESD
S
TDA7370B
MULTIWATT15V
ORDERING NUMBER:
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 output configuration the high power performances of
the TDA7370B are obtained without bootstrap capacitors.
TDA7370B
BLOCK DIAGRAM
September 2003
1/17
TDA7370B
PIN CONNECTION
(Top view)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
DC Supply Voltage 28 V
S
Operating Supply Voltage 18 V
OP
Peak Supply Voltage (t = 50ms) 50 V
Output Peak Current (not rep. t = 100µs) 4.5 A
O
Output Peak Current (rep. f > 10Hz) 3.5 A
O
Power Dissipation (T
tot
= 85°C) 36 W
case
, TjStorage and Junction Temperature -40 to 150 °C
T
V
V
V
PEAK
I
I
P
stg
THERMAL DATA
Symbol Description Value Unit
R
th j-case
Thermal Resistance Junction-case Max 1.8 °C/W
2/17
TDA7370B
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit; V
= 14.4V; RL = 4Ω, T
S
amb
= 25°C,
f = 1kHz, unless otherwise specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
I
d
P
O
d Distortion RL = 4Ω;
CT Cross Talk f = 1kHz Bridge
R
IN
G
V
G
V
E
IN
SVR Supply Voltage Rejection R
ASB Stand-by Attenuation 60 dB
I
SB
V
SB ON
V
SB OFF
V
OS
I
CD OFF
I
CD ON
(*) Weighted A
(**) Pin 10 Pulled-up to 5V with 10kΩ;
Supply Range 8 18 V
Total Quiescent Drain Current RL =
∞
150 mA
Output Power RL = 4Ω; THD = 10%
Single Ended
Bridge
Single Ended, P
Bridge, P
= 0.1 to 10W 0.03
O
= 0.1 to 4W
O
5.5 6.5
20
0.5 %
65
f = 10kHz Bridge
f = 1kHz Single Ended
f = 10kHz Single Ended
Input Impedance Single Ended
Bridge
Voltage Gain Single Ended
Bridge
20
55
60
50
15
20
26
Voltage Gain Match. 1 dB
Input Noise Voltage (*) SINGLE ENDED
Non Inv. Ch., R
Inv. Ch., R
BRIDGE (R
= 0; f = 100Hz to 10kHz 50 dB
g
= 10kΩ
g
= 10kΩ
g
= 0 to 10kΩ)
g
3.0
5
3.5
ST-BY Current 1 µA
ST-BY On Threshold Voltage 1.5 V
ST-BY Off Threshold Voltage 3.5 V
Output Offset Voltage 200 mV
Clipping Detector "OFF"
Output Average Current
Clipping Detector "ON"
Output Average Current
THD = 1% (**)
100 µA
THD = 10% (**)
190 µA
W
W
%
dB
dB
dB
dB
KΩ
KΩ
dB
dB
µV
µV
µV
3/17
TDA7370B
APPLICATION CIRCUIT
(QUAD ST EREO)
QUAD STEREO P.C. BOARD AND COMPONENT LAYOUT (1:1 SCALE)
B
4/17
TDA7370B
APPLICATION CIRCUIT
(DOUBLE BRIDGE)
DOUBLE BRIDGE P.C. BOARD AND COMPONENT LAYOUT (1:1 SCALE)
B
5/17
TDA7370B
APPLICATION CIRCUIT
(STEREO/BRIDGE)
Figure 1:
6/17
Quiescent Drain Current vs. Supply
Voltage (Bridge/Single Ended)
Figure 2:
Quiescent Output Voltage vs. Supply
Voltage (Bridge/Single Ended)
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