
Ericsson Internal
PRODUCT SPECIFICATION
3 (6)
Prepared (also subject responsible if other)
No.
MPM/BK Johan Hgberg/Conny Bckstrm
3/1301-BMR 653 Uen
Approved
Checked
Date
Rev
Reference
MPM/BK (Natalie Johansson)
(MICANWO) 2007-05-03
G
Over Temperature Protection (OTP)
The DC/DC converters are protected from thermal overload
by an internal over temperature shutdown circuit.
When Tref as defined in thermal consideration section
exceeds 135°C the DC/DC converter will shut down. The
DC/DC converter will make continuous attempts to start up
(non latching mode) We provide an optional variant of the
product with a latching OTP. Add suffix “LP” to the standard
product code to order the latching version. The latching OTP
version has a latching OVP as well.
If the OTP/OVP is latched the module can be put in operation
either by switching OFF and ON the input voltage or drive
OFF and ON the RC (Remote Control) pin.
Over Voltage Protection (OVP)
The DC/DC converters have output over voltage protection
that will shut down the DC/DC converter in over voltage
conditions. The DC/DC converter will make continuous
attempts to start up (non-latching mode) and resume normal
operation automatically after removal of the over voltage
condition.
Add suffix “LP” to the standard product code to order the
latching version. The latching OVP version has a latching OTP
as well.
If the OTP/OVP is latched the module can be put in operation
either by switching OFF and ON the input voltage or drive
OFF and ON the RC (Remote Control) pin.
Over Current Protection (OCP)
The DC/DC converters include current limiting circuitry for
protection at continuous overload.
The output voltage will decrease towards zero for output
currents in excess of max output current (max IO). The DC/DC
converter will resume normal operation after removal of the
overload. The load distribution should be designed for the
maximum output short circuit current specified.
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V,12V/33A
EN/LZT 146 305 R4B May 2007
Ericsson Power Modules AB
Technical Specication
15