PEF2023 SIEMENS [Siemens Semiconductor Group], PEF2023 Datasheet - Page 9

• Manufacturer Part Number: PEF2023
• Description: ISDN DC Converter Circuit IDCC
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

1.5
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.
Figure 2
PEB/F 2023 in ISDN-Concept
Semiconductor Group
S
System Integration
Current
Limiter
Current
Limiter
5V
40V
40V
reverse Polarity
Transceiver
NPM
RPM
S
PEB 2023
Converter
PEF 2023
Converter
Controller
DC/DC
AC/DC
Interface
CODEC
9
HDLC
Transceiver
U
AC 230V
µ.C.
PEB 2023
PEF 2023
Overview
U
08.97