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E36SR05015NRFA Datasheet(PDF) 9 Page - Delta Electronics, Inc.

Part No. E36SR05015NRFA
Description  Delphi Series E36SR, Eighth Brick Family DC/DC Power Modules: 18~75V in, 3.3V/20A out
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Maker  DELTA [Delta Electronics, Inc.]
Homepage  http://www.deltaww.com
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E36SR05015NRFA Datasheet(HTML) 9 Page - Delta Electronics, Inc.

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DS_E36SR3R320_10292013
9
FEATURES DESCRIPTIONS (CON.)
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point,
the modules may be connected with 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.
Figure 18: Circuit configuration for trim-down (decrease
output voltage)
If the external resistor is connected between the TRIM
and SENSE (-) pins, the output voltage set point
decreases (Fig. 18). The external resistor value
required to obtain a percentage of output voltage
change △% is defined as:
K
down
Rtrim
21
.
10
511
Ex. When Trim-down -10%(3.3V×0.9=2.97V)
K
down
Rtrim
89
.
40
21
.
10
10
511
Figure 19: Circuit configuration for trim-up (increase output
voltage)
If the external resistor is connected between the TRIM
and SENSE (+) the output voltage set point increases
(Fig. 19). The external resistor value required to obtain
a percentage output voltage change △% is defined
as:
K
up
Rtrim
21
.
10
511
1.225
)
(100
Vo
11
.
5
Ex. When Trim-up +10%(5V×1.1=5.5V)
K
up
Rtrim
11
.
90
21
.
10
10
511
10
1.225
)
10
(100
3
.
3
11
.
5
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.


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