TDA7382 STMicroelectronics, TDA7382 Datasheet - Page 8

• Manufacturer Part Number: TDA7382
• Description: IC AMP AUDIO PWR 30W 25FLEXIWATT
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7382

• Output Type: 4-Channel (Quad)
• Max Output Power X Channels @ Load: 30W x 4 @ 4 Ohm
• Voltage - Supply: 8 V ~ 18 V
• Features: Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Package / Case: 25-Flexiwatt (bent and staggered leads)
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 4-Channel Stereo
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.04@4Ohm@4W%
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Power Dissipation: 80W
• Rail/rail I/o Type: Rail to Rail Output
• Power Supply Rejection Ratio: 65dB
• Single Supply Voltage (max): 18V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Mounting: Through Hole
• Pin Count: 25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7382
signed in order to obtain a virtually pop-free tran-
sition has to be slower than 2.5V/ms.
CLIPPING DETECTOR
The CLIPPING DETECTOR acts in a way to out-
put a signal as soon as one or more outputs
reach or trespass a typical THD level of 10%.
As a result, the clipping-related signal at pin 25
takes the form of pulses, which are syncronized
with each single clipping event in the music pro-
gram.
usually operate a filtering/integration of the pulses
train through passive R-C networks and realize a
volume (or tone bass) stepping down in associa-
tion with microprocessor-driven audioprocessors.
The maximum load that pin 25 can sustain is
Figure 12: Diagnostics circuit.
Figure 14: Diagnostics Waveforms.
8/10
Applications making use of this facility
TDA7382
WAVEFORM
WAVEFORM
ST-BY PIN
VOLTAGE
MUTE PIN
VOLTAGE
OUTPUT
Vpin 25
Vs
25
Vpin 25
D97AU810
R
VREF
CLIPPING
1K .
Due to its operating principles, the clipping detec-
tor has to be viewed mainly as a power-depend-
ent feature rather than frequency-dependent. This
means that clipping state causing THD = 10%
typ. will be immediately signaled out whenever a
fixed power level is reached, regardless of the
audio frequency.
In other words, this feature offers the means to
counteract the extremely sound-damaging effects
of heavy clipping, caused by a sudden increase of
odd order harmonics and appearance of serious
intermodulation phenomena.
Figure 13: Clipping Detection Waveforms.
ICLIP
V
0
O
D97AU812A
OUTPUT
SIGNAL
AUDIO
D97AU811
CLIPPING
OUTPUT
CURR.
DET.
t
t
t
t
time