PEB2023 Datasheet, PDF (10/25 Pages) Siemens Semiconductor Group – ISDN DC Converter Circuit IDCC

PEB 2023
PEF 2023
Overview
In figure 3 the S-transformers are replaced by the PEB/F 3023 which is called S-Feeder.
When using the S-Feeder a capacitive coupling between S-receive-path and the S-
Transceiver is necessary. For the S-transmit-path the S-Feeder need an extra 2.4V
transmitter supply voltage. Because of the DC-voltage-drop on the S-Feeder (about 2V
and 4V) the input voltages V_RPM and V_NPM must be increased (to about 42V and 44V).
CODEC
Interface
S
S
Transceiver
U
Transceiver
U
Reset
Generator
S Feeder
PEB 3023
Current
Limiter
5V
2.4V
40V_RPM
Current
Limiter
44V_NPM
reverse Polarity
HDLC
Controller
DC/DC
Converter
PEB 2023
PEF 2023
AC/DC
Converter
µ.C.
AC 230V
Figure 3
PEB/F 2023 in ISDN-Concept
Semiconductor Group
10
08.97