GE Industrial Solutions Zephyr Non-Isolated SMT - Manual (Page 19)

Zephyr Non-Isolated SMT DC-DC Power Module:
0.8V to 3.5V @ 20A Output, 5V to 12V Input
LINEAGE POWER 19
Data Sheet
March 31, 2010
Output Overvoltage Protection
Protection level: The converter provides overvoltage protection by latching off when the output
voltage rises beyond V
TRIP
. V
TRIP
is between 112% and 120% of the nominal output
voltage. Care must be taken because the voltage increase due to T
RIM
can also
contribute to V TRIP .
Overvoltage protection circuit protects against shorted feedback/sense connections.
Voltage sequencing: No allowed variation of input voltages or output current or control signals will falsely
trigger an OVP event or damage the module.
Reset After Shutdown
If the module goes into an overvoltage shutdown state, the module cannot return to normal operation mode
even after the fault has been removed. Input voltage of the module must be reset to restart the module.
Output Overcurrent Protection
Overcurrent protection is provided to protect the module from damage caused by excessive output current.
Current overload is from 5% to 60% over the maximum output current values given in the thermal derating
curves (at 25
°C, 400 LFM, see thermal derating curves Figure 26 – 37). The module will shut down until the
overload is removed, and then will automatically restart.
Overtemperature Protection
The module is protected against failure from overtemperature conditions created by high ambient
temperature or by low or no airflow condition. It will either operate properly within the requirements or shut
down (nonlatching). The module will function as specified under overtemperature conditions until disabled
(nonlatching) by the protection circuit.