Features Descriptions - Delta Electronics Delphi Q48DC Datasheet

FEATURES DESCRIPTIONS

Over-Current Protection
Vi(+)
Vo(+)
The modules include an internal output over-current
protection circuit, which will endure current limiting for
Trim
an unlimited duration during output overload. If the
ON/OFF
output current exceeds the OCP set point, the modules
will automatically shut down (hiccup mode). Rtn
The modules will try to restart after shutdown. If the
Vo(-)
Vi(-)
overload condition still exists, the module will shut down
again. This restart trial will continue until the overload
condition is corrected.
Figure 16: Remote on/off implementation
Over-Voltage Protection
The modules include an internal output over-voltage
protection circuit, which monitors the voltage on the
output terminals. If this voltage exceeds the over-voltage
set point, the module will shut down and latch off. The
over-voltage latch is reset by either cycling the input
power or by toggling the on/off signal for one second.
Over-Temperature Protection
The over-temperature protection consists of circuitry
that provides protection from thermal damage. If the
temperature exceeds the over-temperature threshold
the module will shut down.
The module will try to restart after shutdown. If the
over-temperature condition still exists during restart, the
module will shut down again. This restart trial will
continue until the temperature is within specification.
Remote On/Off
The remote on/off feature on the module can be either
negative or positive logic. Negative logic turns the
module on during a logic low and off during a logic high.
Positive logic turns the modules on during a logic high
and off during a logic low.
Remote on/off can be controlled by an external switch
between the on/off terminal and the Vi(-) terminal. The
switch can be an open collector or open drain.
For negative logic if the remote on/off feature is not
used, please short the on/off pin to Vi(-). For positive
logic if the remote on/off feature is not used, please
leave the on/off pin to floating.
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