PEB2023 Datasheet, PDF (9/25 Pages) Siemens Semiconductor Group – ISDN DC Converter Circuit IDCC

PEB 2023
PEF 2023
Overview
1.5 System Integration
Figure 2 and 3 showing examples out of the wide application field of the PEB/F 2023. In
network termination applications, the PEB/F 2023 supplies the internal IC’s directly from
the U–interface. If the local main supply of the NT is out of order, then the PEB/F 2023
will also supplies the S-interface (restricted power mode).
In the subscriber terminal the PEB/F 2023 is used for feeding the internal circuits.
The PEB/F 2023 accommodates both galvanically isolated and non-isolated
configurations. Considering the diversity of DC/DC-converter applications, this part of
the specification only shows how to use the special ISDN-features of the PEB/F 2023.
CODEC
Interface
S
S
Transceiver
U
Transceiver
U
HDLC
Controller
µ.C.
Current
Limiter
Current
Limiter
5V
40V_RPM
40V_NPM
reverse Polarity
DC/DC
Converter
PEB 2023
PEF 2023
AC/DC
Converter
AC 230V
Figure 2
PEB/F 2023 in ISDN-Concept
Semiconductor Group
9
08.97