Delta Electronics Series 240W Datasheet page 8

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 be shut down, and enter in the auto-restart
mode or latch mode, which is optional.
For auto-restart mode, the module will monitor the
module temperature
temperature of module is decreased by an OTP hystersis
that is about 30°C, the module will auto-restart.
For latch mode, the module will latch off once it shutdown.
Either cycling the input power or toggling the on/off signal
for one second can reset the latch.
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 logic low and off during logic high. Positive logic
turns the modules on during logic high and off during
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 floating.
Vi(+) Vi(+) Vi(+)
ON/OFF ON/OFF ON/OFF
Vi(-) Vi(-) Vi(-)
Figure 16: Remote on/off implementation
Current Sharing
The modules are designed to operate in parallel without
the use of any external current share circuitry. For
design assistance with Parallel and related PWB layout
issues, please contact Delta's technical support team.
DS_E48SB12020_05222008
after shutdown. Once
Vo(+) Vo(+) Vo(+)
R R
Load Load
Vo(-) Vo(-) Vo(-)
the
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