E-TDA7476013TR STMicroelectronics, E-TDA7476013TR Datasheet - Page 15

• Manufacturer Part Number: E-TDA7476013TR
• Description: IC PROCESSOR RADIO DIAGN 24-SOIC
• Manufacturer: STMicroelectronics
• Type: Audio Processorr

Specifications of E-TDA7476013TR

• Applications: Automotive Audio
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATION NOTES
For example, here below are two cases, with R
The exact values of the above mentioned resistive ranges may vary a little, depending on the power amplifier
used
In Permanent mode for single-ended devices as in fig. 7, 8 a short citcuit to ground is detected both when a
short to ground is really present and when the load is missing.
On single-ended devices as in figure 6, 8 if the loads are present then both in turn-on and in permanent diag-
nostic the fault present on one channel is pointed out for all the loads connected together.For example:
- see fig.8 if CH1+ is shorted to ground, the TDA7476 reveals a short to ground both for CH2 and for CH1.
- see fig.6 if CH1+ is shorted to ground, the TDA7476 detects a short circuit to ground for CH1, CH2, CH3, CH4.
About timing for the TDA7375, connected as in fig.7, Ct = 47 F if Cout = 1000 F, and Ct = 100 F if Cout =
2200 F.
If the circuit is as shown by fig. 8, the suggested values of Ct are as follows: Ct = 22 F if Cout = 1000 F,
Ct = 47 F if Cout = 2200 F.
When single-ended devices are used and the application circuit is as shown in fig. 7,8, it is necessary
to use:
- a greater timing capacitor so that the time tm is high and the outputs of the amplifiers are able to rise over 1V;
- a resistor R
In this case, the loudspeaker resistance ranges in which short circuit, normal operation and open load
are detected will be as follows:
CS
0
0
1.5 times higher than that used for the bridge amplifiers.
S.C. across Load
S.C. across Load
S.C. across Load
0.43
0.24
R3 ,SE
R
R1 ,SE
R2 ,SE
R4 ,SE
1,SE
x
x
x
1.9
1.1
=
R
=
=
Normal Operation
Normal Operation
=
2,SE
Normal Operation
L
---------------------- -
L
-------------------- -
L
------------------- -
I
CS
I
I
n op ,max
s ourc e
L
------------------
I
S C,max
s ourc e
s ou rce
S C,min
so urce
o p,min
= 4.7kOhm and R
=
=
=
=
R
L
--------------------- - R
L
-------------------- - R
L
---------------------- - R
L
------------------ R
54.45
54.45
no p,min
3,SE
19
11
SC,max
54.45
n op,max
op,min
54.45
x
x
x
CS
47
27
CS
CS
= 2.7kOhm.
R
CS
CS
4,SE
Open Load
Open Load
Open Load
D96AU501A
D01AU1257
infinite
infinite
TDA7476
15/19