SGS Thomson Microelectronics TDA7370 Datasheet
QUAD POWER AMPLIFIER FOR CAR RADIO
MINIMUMEXTERNAL COMPONENTCOUNT
HIGHCURRENT CAPABILITY
NO BOOTSTRAPCAPACITORS
NO BOUCHEROTCELLS
CLIP DETECTOR OUTPUT
HIGHOUTPUT POWER
HIGHAPPLICATIONFLEXIBILITY
FIXED GAIN
VERYLOW STAND-BYCURRENT (1µA typ)
NO SWITCH ON/OFF NOISE
PROTECTIONS:
OUTPUT AC/DC SHORT CIRCUIT TO GND
ANDTO V
VERYINDUCTIVE LOADS
OVERRATINGCHIP TEMPERATURE
LOADDUMP VOLTAGE
FORTUITOUS OPEN GND
REVERSEBATTERY
ESD
S
TDA7370
MULTIWATT15
ORDERING NUMBER: TDA7370
DESCRIPTION
The TDA7370 is a newtechnologyclass AB quad
channelsAudioPower Amplifier in Multiwattpackage designed for carradio applications.
Thanks to the fully complementaryPNP/NPNoutput configuration the high power performances of
the TDA7370 are obtained without bootstrap capacitors.
BLOCK DIAGRAM
April 1995
1/17
TDA7370
PIN CONNECTION(Top view)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
PEAK
P
T
stg,Tj
I
I
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
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
2/17
TDA7370
ELECTRICAL CHARACTERISTICS (Refer to the test circuit;VS=14.4V; RL=4Ω,T
amb
=25°C,
f = 1kHz, unless otherwise specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
I
d
P
O
d Distortion R
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 10Pulled-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
=4Ω;
L
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
ClippingDetector ”OFF”
Output Average Current
ClippingDetector ”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
TDA7370
APPLICATIONCIRCUIT (QUADSTEREO)
QUAD STEREO P.C. BOARDAND COMPONENT LAYOUT(1:1 SCALE)
4/17
APPLICATIONCIRCUIT (DOUBLEBRIDGE)
TDA7370
DOUBLE BRIDGEP.C. BOARD AND COMPONENTLAYOUT(1:1 SCALE)
5/17
TDA7370
APPLICATIONCIRCUIT (STEREO/BRIDGE)
Figure1: QuiescentDrain Current vs. Supply
Voltage(Bridge/SingleEnded)
6/17
Figure2: QuiescentOutputVoltage vs. Supply
Voltage(Bridge/SingleEnded)
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