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TDA7391 Arkusz danych(PDF) 4 Page - STMicroelectronics

Numer części TDA7391
Szczegółowy opis  35W BRIDGE CAR RADIO AMPLIFIER
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7391 Arkusz danych(HTML) 4 Page - STMicroelectronics

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FUNCTIONAL DESCRIPTION
Pin
Function
Description
1, 2
INPUTS
The input stage is a high impedance type also capable of operation in single ended mode
with one input capacitively coupled to the signal GND. The impedance seen by the
inverting and non inverting input pins must be matched.
3,9
+VS
Supply Voltage.
4CD
The TDA7391 is equipped with a diagnostic circuitry able to detect the clipping in the
Output Signal (distortion = 10%).
The CD pin (open collector) gives out low level signal during clipping.
5, 7
OUTPUTS
The output stage is a bridge type able to drive loads as low as 3.2
Ω.
It consists of two class AB fully complementary PNP/NPN stages fully protected.
A rail to rail output voltage swing is achieved without need of bootstrap capacitors.
No external compensation is necessary.
6
GND
Ground.
8
STAND-BY
The device features a ST-BY function which shuts down all the internal bias supplies
when the ST-BY pin is low.
In ST-BY mode the amplifier sinks a small current (in the range of few
µA).
When the ST-BY pin is high the IC becomes fully operational.
10
SYNC
A resistor (R2) has to be connect between pin 10 and GND in order to program the current
that flows in the C3 capacitor (pin 11). The values of C3 and R2 determine the time
required to bias the amplifier.
11
MUTE
The pin will have a capacitor (C3) tied to GND to set the MUTE/STAND-BY time. An
automatic Mute during turn on/off is provided to prevent noisy transients.
Figure 3: P.C. Board and Component Layout of the Fig. 1 (1:1 scale).
TDA7391
4/8


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