PEB3265 Infineon Technologies Corporation, PEB3265 Datasheet - Page 96

• Manufacturer Part Number: PEB3265
• Description: (PEB326x / PEB426x) Dual Channel Slicofi-2 / Slic Duslic
• Manufacturer: Infineon Technologies Corporation

Preliminary
The most efficient way to reduce short-loop power dissipation is to use a lower battery
supply voltage (
supported on the SLIC-E/-E2 by integrating a battery switch. With a standard battery
voltage of – 48 V, long lines up to 2 k = can be driven at 20 mA line current.
The SLIC-P PEB 4266 “low-power” version even allows three battery voltages (typically
the most negative one, e.g. – 48 V, is used in Active mode (On-hook) and Power Down
mode).
DuSLIC contains two mechanism which can be used as indication for the battery
switching:
1. A threshold for the voltage at Tip/Ring can be set for generating an interrupt
2. The change between constant current and resistive feeding will generate an interrupt
4.7.3.3
A scheme for a typical calculation is shown in
Figure 40
R
Conditions:
Typical Power Consumption Calculation with SLIC-E/-E2
Assuming a typical application where the following battery voltages are used:
V
up to
can be used (Mode ACTR).
Requirement for TTX:
Data Sheet
PROT
DD
= 5 V,
R
= 40
L
= 1900
SLIC Power Consumption Calculation in Active Mode
V
V
R
V
BATL
Voice peak
PHONE
PHONE
,
Circuit Diagram
Circuit Diagram for Power Consumption
OFF-HOOK
R
STAB
V
= – 43 V,
. For longer lines (
BATL
= 60
V
I
) whenever line resistance is small enough. This method is
= 2 V,
LINE
TTX
V
= 2.5 Vrms at a load of 200 .
V
,
BATH
I
SUBSCRIBER
R
Voice peak
PHONE
R
LINE
= – 62 V,
R
L
= 150
= 2 mA,
> 1900
96
V
Figure
HR
R
,
PROT
V
V
= 80 V and line feeding is guaranteed
) the extended battery feeding option
PHONE
TTX,rms
+ R
40.
STAB
V
TR
= 7 V,
(see example below)
Operational Description
I
LINE
SLIC
= 20 mA
ezm14049.emf
2000-07-14
DuSLIC