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參數(shù)資料
| 型號： | TEA7092TQ |
| 廠商： | 意法半導體 |
| 英文描述： | TELEPHONE ANALOG FRONT END |
| 中文描述： | 電話模擬前端 |
| 文件頁數(shù)： | 35/57頁 |
| 文件大?。?/td> | 574K |
| 代理商： | TEA7092TQ |
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III.5 - MaximumOutput Power
The loudspeaker part is powered through the
Pin V
LS
(Pin 1). The V
LS
power could come from
the line,PinV
L
(Pin3) or an external powersupply,
+5V forexample.
When itis poweredfromthe line, PinV
L
(Pin3),the
available current, I
LS
and the voltage at
Pin V
LS
(Pin 1) depend on the line current I
L
.
- V
LS
(Pin 1) = V
L
(Pin 3) - (0.95 + 10 x I
LS
)
- I
LS
= 0.74 x I
L
- 1.8mA; if I
L
< 15mA
- I
LS
= 0.92 x I
L
- 4.5mA; if I
L
> 15mA
The current consumption of the loudspeakeram-
plifier is 1mA, sothe current availablefor the loud-
speakeris : I
LS1
= I
LS
- 1mA
Figures 51, 52 and 53 give the maximum power
available on the loudspeaker for different loud-
speaker impedances (25, 32, 50
) and different
values of R12 (R12 sets up the DC voltage at
Pin V
L
(Pin
3)
and the DC
Pin V
LS
(Pin 1), thus it has an influence on the
maximum power availableon the loudspeaker).
voltage at
I
L
(mA)(R12 = 82k
)
0
20
10
40
30
60
50
80
70
100
90
P
LS = 25
LS = 32
LS = 50
110
100
90
80
70
60
50
40
30
20
10
0
A
Figure 52 :
Output Power On LSOUT
I
L
(mA) (R12 = 110k
)
0
20
10
30
40
50
60
P
LS = 25
LS = 32
LS = 50
110
100
90
80
70
60
50
70
80
90
100
110
40
30
20
10
0
120
130
A
Figure 53 :
Output Power On LSOUT
III - CALLPROGRESS MONITOR AND GROUP LISTENING MODES
(continued)
Whenthereis enoughline current to drive properly
the charge on the loudspeaker output, the maxi-
mum peak to peak dynamic is :
- On Rloudspeaker= 25
: V
PP
= V
LS
- 1.1V
- On Rloudspeaker= 32
: V
PP
= V
LS
- 1V
- On Rloudspeaker= 50
: V
PP
= V
LS
- 0.9V
I
L
(mA)(R12 = 68k
)
0
20
10
40
30
60
50
80
70
100
90
P
LS = 25
LS = 32
LS = 50
110
100
90
80
70
60
50
40
30
20
10
0
A
Figure 51 :
OutputPower OnLSOUT
TEA7092 - TELEPHONE SET INTEGRATEDCIRCUIT
35/57
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| TEA7092TQT | TELEPHONE ANALOG FRONT END |
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相關代理商/技術參數(shù) |
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