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參數(shù)資料
| 型號： | TDA7476013TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO24 |
| 封裝： | SOP-24 |
| 文件頁數(shù)： | 7/22頁 |
| 文件大小： | 377K |
| 代理商： | TDA7476013TR |
15/19
TDA7476
APPLICATION NOTES
s
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 RCS 1.5 times higher than that used for the bridge amplifiers.
In this case, the loudspeaker resistance ranges in which short circuit, normal operation and open load
are detected will be as follows:
For example, here below are two cases, with RCS = 4.7kOhm and RCS = 2.7kOhm.
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 = 1000F, and Ct = 100F 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 = 1000F,
Ct = 47
F if Cout = 2200F.
S.C. across Load
x
Open Load
R2,SE
R3,SE
x
Normal Operation
R1,SE
R4,SE
D01AU1257
R1 ,SE
L
SC ,max
I
s ourc e
---------------------
L
SC,max
54.45
--------------------- R
CS
==
R2 ,SE
L
SC ,min
I
source
--------------------
L
no p,min
54.45
---------------------- R
CS
==
R3 ,SE
L
nop,max
I
s ourc e
-----------------------
L
n op,max
54.45
----------------------- R
CS
==
R4 ,SE
L
op,min
I
so urce
------------------
L
op,min
54.45
------------------ R
CS
==
S.C. across Load
x
Open Load
0
1.9
19
infinite
x
Normal Operation
0.43
47
D96AU501A
S.C. across Load
x
Open Load
0
1.1
11
infinite
x
Normal Operation
0.24
27
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| TDA7479 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SINGLE CHIP RDS DEMODULATOR FILTER |
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