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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)： | 30/64頁 |
| 文件大?。?/td> | 1052K |
| 代理商： | PBL38773/1ML |
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Ringing FlexiSLIC
PBL 38773/1
Transmission
Data Sheet
36
DS1, 2003-06-18
value of 470 nF will position the high end frequency response 3 dB break point of the AC
loop at 0.3 Hz (
f
3dB).
5.11
Adaptive Overhead Voltage, AOV
The Adaptive Overhead Voltage feature minimizes the SLIC power dissipation by
permitting the TIPX and RINGX DC voltages to operate very close to the supply rails.
When the SLIC detects a condition where the AC signal on TIPX/RINGX is approaching
the supply rail and therefore would become distorted, the SLIC adjusts the overhead
voltage, such that the TIPX/RINGX DC bias is moved away from the rails and thereby
yielding enough peak signal swing for the AC signal. High level signal conditions such
as when voice and metering signals are transmitted simultaneously are therefore
automatically accommodated for the duration of the high level signal condition. This AOV
system provides the designer with a flexible solution for different system requirements
and possible future changes regarding voice, metering and other signal levels. There is
no DC overhead level that must be set to a fixed value on account of worst case
predicted peak AC signal value. Overhead voltage is defined as the voltage between
TIPX and RINGX or RINGX and VTB (depending on selected state or used battery). The
PBL 38773/1 will behave as a SLIC with fixed overhead voltage for signals in the
0-20 kHz range and with an amplitude less than 1 V
Peak. For signal amplitudes between
1V
Peak and 1.25 VPeak the adaptive overhead function will expand the overhead voltage
making it possible for the signal to propagate through the SLIC without distortion. The
expansion of the overhead occurs instantaneously. When the signal amplitude
decreases, the overhead returns to its initial value with a time constant of approximately
one second.
During operation the influence of the adaptive overhead function will not effect the SLIC
performance in the constant current region of operation. If, however, the SLIC is in the
off-hook, constant voltage region of operation, then the influence of the adaptive
headroom will be apparent as a slight decrease in line voltage (and hence line current)
as the SLIC adjusts to accommodate the larger signal (e.g. voice + metering).
相關PDF資料 |
PDF描述 |
|---|---|
| PBL38773/1SO | TELECOM-SLIC, PDSO28 |
| PC-PVC-271K | 1 ELEMENT, 270 uH, GENERAL PURPOSE INDUCTOR |
| PC-PVC-270K | 1 ELEMENT, 27 uH, GENERAL PURPOSE INDUCTOR |
| PC-PVC-331K | 1 ELEMENT, 330 uH, GENERAL PURPOSE INDUCTOR |
| PC-PVC-392K | 1 ELEMENT, 3900 uH, GENERAL PURPOSE INDUCTOR |
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