Datasheet
Pins description TDA7391PD
4/12 Doc ID 6326 Rev 5
2 Pins description
Figure 3. Pins connection (top view)
Table 2. Pins function
Pin Function Description
14, 15 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.
5, 16
+
V
S
Supply voltage.
17 CD
The TDA7391PD 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.
2, 19 OUTPUTS
The output stage is a bridge type able to drive loads as low as 3.2. 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.
1, 10,
11, 20
GND Power Ground.
12 S-GND Signal ground.
4 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 A). When the ST-BY pin is high the IC becomes
fully operational.
8 SYNC
A resistor (R
2
) has to be connect between pin 8 and GND in order to program
the current
that flows in the C
3
capacitor (pin 9). The values of C
3
and R
2
determine the
time required to bias the amplifier.
9MUTE
The pin will have a capacitor (C
3
) tied to GND to set the MUTE/STAND-BY
time.
An automatic Mute during turn on/off is provided to prevent noisy transients.
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