TDA7370BV STMicroelectronics, TDA7370BV Datasheet - Page 13

• Manufacturer Part Number: TDA7370BV
• Description: IC AMP QUAD PWR CAR MULTIWATT15V
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7370BV

• Output Type: 2-Channel (Stereo) or 4-Channel (Quad)
• Max Output Power X Channels @ Load: 20W x 2 @ 4 Ohm; 6.5W x 4 @ 4 Ohm
• Voltage - Supply: 8 V ~ 18 V
• Features: Depop, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Package / Case: Multiwatt-15 (Vertical, Bent and Staggered Leads)
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 1-Channel Mono/2-Channel Stereo/4-Channel Stereo
• Audio Amplifier Function: Speaker
• Single Supply Voltage (typ): 9/12/15V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Power Dissipation: 36W
• Rail/rail I/o Type: Rail to Rail Output
• Single Supply Voltage (min): 8V
• Single Supply Voltage (max): 18V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Mounting: Through Hole
• Pin Count: 15 +Tab
• Package Type: MULTIWATT V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CLIPPING DETECTOR
Figures 25 and 26 show an application using the
TDA7370B in combination with the SGS-THOM-
SON audioprocessor TDA7302.
The output clipping is recognized by the microproc-
essor (in this application it is simulated by a PC).
The detailed way to operate of the system is rep-
resented by the flow-chart of fig.24
The controller detects when the clipping is active
(minimun detection width fixed by a C29 = 12 nF
external capacitor), and reduces the volume (or
bass ) by steps of 2 dB (with a programmable
waiting time), until no more clipping is detected.
Then the controller waits for a programmable time
before increasing the volume again by step of 2
dB until clipping is again detected or the panel se-
lected volume is reached.
Practical advantages of this application is a better
sound quality deriving from operation under no
clipping conditions, which also means the avail-
ability of higher undistorted power.
Figure 24: Clipping Detector Control Routine
WHAT IS NEEDED FOR A DEMONSTRATION
GENERAL INFORMATION
In the application shown in figures 25 and 26 the
TDA7302 audioprocessor works on PC XT or AT
IBM compatible.
Control is accomplished by serial bus ( S-bus or
I
the PC parallel port.
The PC simulates the behaviour of the microproc-
essor in a real application (for example in a car
radio) and the buffer is necessary only in this ap-
plication for protecting the PC.
2
C-bus or SPI bus) sent to the test board through
- a XT or AT IBM compatible PC, supplied with
- a SGS-THOMSON audioprocessor application disk
- a TDA 7302 + TDA7370B board
- a connector from audioprocessor board to PC
EGA card
parallel port
TDA7370B
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