E36SC05025 Datasheet, PDF (8/15 Pages) Delta Electronics, Inc. – 125W DC/DC Power Modules

reliability of a power module and severely affect the
finished circuit board assembly test. Adequate cleaning
and/or drying is especially important for
un-encapsulated and/or open frame type power
modules. For assistance on appropriate soldering and
cleaning procedures, please contact Delta’s technical
support team.
FEATURES DESCRIPTIONS
Over-Current Protection
The modules include an internal output over-current
protection circuit, which will endure current limiting for
an unlimited duration during output overload. If the
output current exceeds the OCP set point, the modules
will shut down (hiccup mode).
The modules will try to restart after shutdown. If the
overload condition still exists, the module will shut down
again. This restart trial will continue until the overload
condition is corrected.
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 protection circuit will constrain the max
duty cycle to limit the output voltage, if the output
voltage continuously increases the modules will shut
down, and then restart after a hiccup-time (hiccup
mode).
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 restart after
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.
Vi(+) _Vo(+)
Sense(+)
ON/OFF _trim
Sense(-)
Vi(-) Vo(-)
Rload
Figure 16: Remote on/off implementation
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point,
connect an external resistor between the TRIM pin and
either the SENSE(+) or SENSE(-). The TRIM pin
should be left open if this feature is not used.
For trim down, the external resistor value required to
obtain a percentage of output voltage change △% is
defined as:
Rtrim

down



511


10.22_{}K
Ex. When Trim-down -20% (5.0V×0.8=4.0V)
Rtrim

down



511
20

10.22_{}K

15.33K
For trim up, the external resistor value required to
obtain a percentage output voltage change △% is
defined as:
Rtrim  up  ^{5.11Vo (100   )}  ⁵¹¹ 10.22K
1.225

Ex. When Trim-up +10% (5.0V×1.1=5.5V)
Rtrim  up  ^{5.11 5.0  (100  10)}  ⁵¹¹ 10.22  168K
1.225  10
10
The output voltage can be increased by both the remote
sense and the trim, however the maximum increase is
the larger of either the remote sense or the trim, not the
sum of both.
When using remote sense and trim, the output voltage
of the module is usually increased, which increases the
power output of the module with the same output
current.
Care should be taken to ensure that the maximum
output power of the module remains at or below the
maximum rated power.
DS_E36SC05025_08162013
E-mail: [e-mail]
http://www.deltaww.com/dcdc
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