TDA7370
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 (1μA typ) NO SWITCH ON/OFF NOISE
PROTECTIONS:
OUTPUT AC/DC SHORT CIRCUIT TO GND AND TO VS
VERY INDUCTIVE LOADS OVERRATING CHIP TEMPERATURE LOAD DUMP VOLTAGE FORTUITOUS OPEN GND REVERSE BATTERY
ESD
BLOCK DIAGRAM
MULTIWATT 15
ORDERING NUMBER: TDA7370
DESCRIPTION
The TDA7370 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 TDA7370 are obtained without bootstrap capacitors.
April 1995 |
1/17 |
TDA7370
PIN CONNECTION (Top view)
ABSOLUTE MAXIMUM RATINGS
Symbol |
Parameter |
Value |
Unit |
VS |
DC Supply Voltage |
28 |
V |
VOP |
Operating Supply Voltage |
18 |
V |
VPEAK |
Peak Supply Voltage (t = 50ms) |
50 |
V |
IO |
Output Peak Current (not rep. t = 100μs) |
4.5 |
A |
IO |
Output Peak Current (rep. f > 10Hz) |
3.5 |
A |
Ptot |
Power Dissipation (Tcase = 85°C) |
36 |
W |
Tstg, Tj |
Storage and Junction Temperature |
-40 to 150 |
°C |
THERMAL DATA
Symbol |
Description |
|
Value |
Unit |
Rth 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, Tamb = 25°C, f = 1kHz, unless otherwise specified)
Symbol |
Parameter |
Test Condition |
Min. |
Typ. Max. |
Unit |
VS |
Supply Range |
|
8 |
18 |
V |
Id |
Total Quiescent Drain Current |
RL = ∞ |
|
150 |
mA |
PO |
Output Power |
RL = 4Ω; THD = 10% |
|
|
|
|
|
Single Ended |
5.5 |
6.5 |
W |
|
|
Bridge |
|
20 |
W |
d |
Distortion |
RL = 4Ω; |
|
|
|
|
|
Single Ended, PO = 0.1 to 4W |
|
0.5 |
% |
|
|
Bridge, PO = 0.1 to 10W |
|
0.03 |
% |
CT |
Cross Talk |
f = 1kHz Bridge |
|
65 |
dB |
|
|
f = 10kHz Bridge |
|
55 |
dB |
|
|
f = 1kHz Single Ended |
|
60 |
dB |
|
|
f = 10kHz Single Ended |
|
50 |
dB |
RIN |
Input Impedance |
Single Ended |
20 |
|
KΩ |
|
|
Bridge |
|
15 |
KΩ |
GV |
Voltage Gain |
Single Ended |
|
20 |
dB |
|
|
Bridge |
|
26 |
dB |
GV |
Voltage Gain Match. |
|
|
1 |
dB |
EIN |
Input Noise Voltage (*) |
SINGLE ENDED |
|
|
|
|
|
Non Inv. Ch., Rg = 10kΩ |
|
3.0 |
μV |
|
|
Inv. Ch., Rg = 10kΩ |
|
5 |
μV |
|
|
BRIDGE (Rg = 0 to 10kΩ) |
|
3.5 |
μV |
SVR |
Supply Voltage Rejection |
Rg = 0; f = 100Hz to 10kHz |
|
50 |
dB |
ASB |
Stand-by Attenuation |
|
60 |
|
dB |
ISB |
ST-BY Current |
|
|
1 |
μA |
VSB ON |
ST-BY On Threshold Voltage |
|
|
1.5 |
V |
VSB OFF |
ST-BY Off Threshold Voltage |
|
3.5 |
|
V |
VOS |
Output Offset Voltage |
|
|
200 |
mV |
ICD OFF |
Clipping Detector ºOFFº |
THD = 1% (**) |
|
|
μA |
|
Output Average Current |
|
|
100 |
|
ICD ON |
Clipping Detector ºONº |
THD = 10% (**) |
|
|
μA |
|
Output Average Current |
|
|
190 |
(*) Weighted A
(**) Pin 10 Pulled-up to 5V with 10kΩ;
3/17
TDA7370
APPLICATION CIRCUIT (QUAD STEREO)
QUAD STEREO P.C. BOARD AND COMPONENT LAYOUT (1:1 SCALE)
4/17
TDA7370
APPLICATION CIRCUIT (DOUBLE BRIDGE)
DOUBLE BRIDGE P.C. BOARD AND COMPONENT LAYOUT (1:1 SCALE)
5/17
TDA7370
APPLICATION CIRCUIT (STEREO/BRIDGE)
Figure 1: Quiescent Drain Current vs. Supply |
Figure 2: Quiescent Output Voltage vs. Supply |
Voltage (Bridge/Single Ended) |
Voltage (Bridge/Single Ended) |
6/17
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