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PDF TDA7389 Data sheet ( Hoja de datos )

Número de pieza TDA7389
Descripción 4 x 45W quad bridge car radio amplifier
Fabricantes STMicroelectronics 
Logotipo STMicroelectronics Logotipo



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No Preview Available ! TDA7389 Hoja de datos, Descripción, Manual

TDA7389
4 x 45W quad bridge car radio amplifier
Features
High output power:
www.DataSheet4U.com– 4 x 45W/4Ω max.
– 4 x 28W/4Ω @ 14.4V, 1KHz, 10%
Low distortion
Low output noise
Stand-by function
Mute function
Automute at min. supply voltage detection
Low external component count:
– Internally fixed gain (26dB)
– No external compensation
– No bootstrap capacitors
Clipping detector
Diagnostic facility for:
– Out to GND short
– Out to VS short
– Thermal shutdown
Protections:
Output short circuit to GND, to VS, across the
load
Very inductive loads
Overrating chip temperature with soft thermal
limiter
Flexiwatt 25
Load dump voltage
Fortuitous open GND
Reversed battery
ESD
Description
The TDA7389 is a new technology class AB Audio
Power Amplifier in Flexiwatt 25 package designed
for high end car radio applications.
Thanks to the fully complementary PNP/NPN
output configuration the TDA7389 allows a rail to
rail output voltage swing with no need of bootstrap
capacitors.
Table 1.
Device summary
Order code
TDA7389
Package
Flexiwatt 25
Packing
Tube
November 2007
Rev 1
1/14
www.st.com
1

1 page




TDA7389 pdf
TDA7389
Pins connection and block diagrams
1 Pins connection and block diagrams
www.DataSheet4U.com
Figure 1. Block diagram
Vcc1
ST-BY
MUTE
IN1
IN2
IN3
IN4
AC-GND
SVR
Vcc2
TAB S-GND
Figure 2. Pins connection (top view)
CD
OUT1+
OUT1-
PW-GND
OUT2+
OUT2-
PW-GND
OUT3+
OUT3-
PW-GND
OUT4+
OUT4-
PW-GND
D99AU1018A
1 25
D94AU159mod
5/14

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TDA7389 arduino
TDA7389
3 Application hints
Application hints
Ref. to the circuit of Figure 14.
3.1
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SVR
Besides its contribution to the ripple rejection, the SVR capacitor governs the turn ON/OFF
time sequence and, consequently, plays an essential role in the pop optimization during
ON/OFF transients.
To conveniently serve both needs, ITS MINIMUM RECOMMENDED VALUE IS 22µF, 47µF
can be used to optimize pop performances.
3.2 Input stage
The TDA7389’s inputs are ground-compatible and can stand very high input signals (±
8Vpk) without any performances degradation.
If the standard value for the input capacitors (0.1µF) is adopted, the low frequency cut-off
will amount to 16 Hz.
The input capacitors should be 1/4 of the capacitor connected to AC-GND pin for optimum
pop performances.
3.3 Stand-by and Muting
Stand-by and Muting facilities are both 3.3V CMOS-COMPATIBLE. If unused, a straight
connection to Vs of their respective pins would be admissible.
Conventional/low-power transistors can be employed to drive muting and stand-by pins in
absence of true CMOS ports or microprocessors. R-C cells have always to be used in order
to smooth down the transitions for preventing any audible transient noises.
Since a DC current of about 10µA normally flows out of pin 23, the maximum allowable
muting-series resistance (R2) is 70KΩ, which is sufficiently high to permit a muting capacitor
reasonably small (about 1µF).
If R2 is higher than recommended, the involved risk will be that the voltage at pin 23 may rise
to above the 1.2V threshold voltage and the device will consequently fail to turn OFF when
the mute line is brought down.
About the stand-by, the time constant to be assigned in order to obtain a virtually pop-free
transition has to be slower than 2.5V/ms.
11/14

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