PBL38620/2SOAXT Infineon Technologies, PBL38620/2SOAXT Datasheet - Page 35

• Manufacturer Part Number: PBL38620/2SOAXT
• Manufacturer: Infineon Technologies

Specifications of PBL38620/2SOAXT

• Number Of Channels: 1
• On-hook Transmission: Yes
• Polarity Reversal: Yes
• On-chip Ring Relay Driver: Yes
• Operating Temp Range: 0C to 70C
• Loop Current Limit: 30mA
• Operating Temperature Classification: Commercial
• Pin Count: 24
• Mounting: Surface Mount
• Operating Supply Voltage (max): 5.25/-58V
• Lead Free Status / RoHS Status: Compliant

6
The PBL 38620/2 SLIC emulates a battery characteristic with adjustable current
limitation. The open loop voltage measured between the TIPX and RINGX terminals
tracks the battery voltage
programmable with a resistor
ground. Please refer to
programmed signal overhead voltage
open loop conditions according to
below for the typical value of
Table 10
Symbol
V
The current limit (reference A - C in
between terminal PLC and ground according to the equation:
where
A second lower battery voltage may be connected to the device at terminal VBAT2 to
reduce short loop power dissipation.
The SLIC automatically switches between the two battery supply voltages without need
for external control. The silent battery switching occurs when the line voltage passes the
value
|VB2| - 40
For correct functionality it is important to connect the terminal VBAT2 to the second
power supply via the diode
between terminal VBAT and the VB2 power supply, see
SLIC continues to work on the second battery even if the first battery voltage disappears.
If a second battery voltage is not used, VBAT2 is connected to VBAT on the SLIC and
C
6.1
The PBL 38620/2 SLIC has got a receive interface at the four- wire side which makes it
possible to reduce the number of capacitors in the applications and to fit both single and
dual battery feed CODECs. The RSN terminal, connecting to the CODEC receive output
via the resistor
currents floating due to DC voltage differences between RSN and the CODEC output
Data Sheet
I
LProg
OH
VB2
,
D
=
R
BB
LC
1000
----------- -
R
and
is in k for
Battery Feed
LC
CODEC Receive Interface
I
L
Battery Overhead
D
–
-
R
V
VB2
4.0
RX
TRO
, is DC biased with +1.25 V. This makes it possible to compensate for
are removed.
= 3.6 V
I
Value (typ)
2.5 +
LProg
Chapter
V
in mA.
BAT
V
V
TRO
D
R
OH
. The signalling headroom, or overhead voltage
VB2
OV
6.2. The battery voltage overhead,
.
, see
connected between terminal POV on the SLIC and
V
Figure
TR
V
(at
TRO
Figure
I
35
12) is adjusted by connecting a resistor,
L
.
Unit
V
V
= 0 mA) = |
OH
8. An optional diode
defines the TIP and RING voltage at
Figure
V
BAT
| -
8, will make sure that the
V
OH
Specification
–
V
OH
Rev. 2.0, 2005-04-13
Refer to the table
, depends on the
D
PBL 38620/2
Battery Feed
BB
FlexiSLIC
connected
V
TRO
R
[13]
, is
LC
,