SGS Thomson Microelectronics TDA7370B Datasheet
TDA7370B
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
S
VERYINDUCTIVE LOADS
OVERRATINGCHIP TEMPERATURE
LOADDUMP VOLTAGE
FORTUITOUS OPEN GND
REVERSEBATTERY
ESD
DESCRIPTION
The TDA7370B is a new technology class AB
quad channels Audio Power Amplifier in Multiwatt
packagedesignedfor carradioapplications.
Thanks to the fullycomplementaryPNP/NPNoutput configuration the high powerperformances of
the TDA7370B areobtained withoutbootstrap capacitors.
April 1995
BLOCK DIAGRAM
MULTIWATT15V
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 SupplyVoltage(t = 50ms) 50 V
I
O
Output Peak Current (not rep. t = 100µs) 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,Tj
Storage and JunctionTemperature -40 to150 °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 thetest 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
Supply Range 8 18 V
I
d
Total Quiescent Drain Current RL= ∞ 150 mA
P
O
Output Power RL=4Ω; THD = 10%
Single Ended
Bridge
5.5 6.5
20
W
W
d Distortion R
L
=4Ω;
Single Ended, P
O
= 0.1 to 4W
Bridge, P
O
= 0.1to 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
KΩ
KΩ
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
= 10kΩ
Inv. Ch.,R
g
= 10kΩ
BRIDGE (R
g
= 0 to 10kΩ)
3.0
5
3.5
µV
µV
µV
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 µA
V
SB ON
ST-BY On ThresholdVoltage 1.5 V
V
SB OFF
ST-BY Off ThresholdVoltage 3.5 V
V
OS
Output Offset Voltage 200 mV
I
CD OFF
ClippingDetector ”OFF”
Output Average Current
THD = 1% (**)
100 µA
I
CD ON
ClippingDetector ”ON”
Output Average Current
THD = 10% (**)
190 µA
(*) Weighted A
(**) Pin 10 Pulled-up to 5V with 10kΩ;
TDA7370B
3/17
APPLICATIONCIRCUIT (QUAD STEREO)
QUAD STEREO P.C. BOARD AND COMPONENT LAYOUT(1:1 SCALE)
B
TDA7370B
4/17
APPLICATIONCIRCUIT (DOUBLE BRIDGE)
DOUBLE BRIDGEP.C. BOARD AND COMPONENTLAYOUT(1:1 SCALE)
B
TDA7370B
5/17
APPLICATIONCIRCUIT (STEREO/BRIDGE)
Figure1: QuiescentDrain Current vs. Supply
Voltage(Bridge/SingleEnded)
Figure2: QuiescentOutputVoltage vs. Supply
Voltage(Bridge/SingleEnded)
TDA7370B
6/17
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