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參數(shù)資料
| 型號： | PBL38773/1ML |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | TELECOM-SLIC, PQCC32 |
| 封裝： | PLASTIC, VQFN-32 |
| 文件頁數(shù)： | 43/64頁 |
| 文件大?。?/td> | 1052K |
| 代理商： | PBL38773/1ML |
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Ringing FlexiSLIC
PBL 38773/1
Ringing Voltage
Data Sheet
48
DS1, 2003-06-18
current. When using a square wave signal the C
RT should be increased to 22 nF. The
ring-trip threshold is calculated according to the equation:
[20]
[21]
With DC-offset:
[22]
[23]
where:
Example:
V
BAT = -80 V, ZBellmin = 1300 , αMax = 0%, RF = 40 , VRDCT-R = 0, RLmin = 0 , This will
give:
R
RT = 64.6 k and a nominal Ring-trip current threshold ILRth = 53.9 mA according
to Equation [24].
I
LTHpeak.
is the line peak current
40
Is the resistance of the SLICs internal resistors connected in series with
output amplifiers (see Figure 13).
R
RT
Is the resistor value of the resistor connected between the PRT-pin and
GND.
V
BAT
Is the voltage at the VBAT pin.
α
Max
Is the variation of the battery. 2% will give an
α = 1.02.
Z
Bellmin
Is the minimum resistance of the bell in on-hook. Typical 1400
for
5REN.
R
F
Is the resistance of one fuse resistor.
R
Lmin
Is the resistance of the minimum loop length.
VR
DCT-R
Is the DC voltage difference between the Tip and Ring wire.
I
LTHpeak
V
BAT
α
max
×
3.5
–
Z
Bellmin
40
2
R
F
R
Lmin
++
+
---------------------------------------------------------------------
=
R
RT
3840
I
LTHpeak
----------------------
=
I
LTHpeak
VBAT
α
max
×
3.5
VR
DCT R
–
Z
Bellmin
40
2
R
F
R
Lmin
++
+
-------------------------------------------------------------------------------
=
R
RT
3480
I
LTHpeak
----------------------
=
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