E48SR3R320NRFA Delta Electronics, E48SR3R320NRFA Datasheet - Page 10

• Manufacturer Part Number: E48SR3R320NRFA
• Description: MODULE DC/DC 8TH BRICK 3.3V 20A
• Manufacturer: Delta Electronics
• Series: DELPHIr
• Type: Isolated with UVLOr

Specifications of E48SR3R320NRFA

• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 66W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module, 1/8 Brick
• 1st Output: 3.3 VDC @ 20A
• Size / Dimension: 2.30" L x 0.90" W x 0.33" H (58.4mm x 22.9mm x 8.4mm)
• Power (watts) - Rated: 66W
• Operating Temperature: -40°C ~ 115°C
• Efficiency: 90.5%
• Approvals: CE, cUL, TUV, UL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -
• Other names: 941-1020

DS_E48SR3R320_05142009
FEATURES DESCRIPTIONS (CON.)
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.
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:
Ex. When Trim-down -20% (3.3V×0.8=2.64V)
Rtrim
Rtrim
−
−
down
down
=
=
⎡
⎢
⎣
⎡
⎢
⎣
511
511
20
Δ
−
−
10
10
2 .
2 .
⎤
⎥
⎦
⎤
⎥
⎦
(
(
K
K
Ω
Ω
)
)
=
15
.
35
(
K
Ω
)
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:
Ex. When Trim-up +10% (3.3V×1.1=3.63V)
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.
Rtrim
Rtrim
−
−
up
up
=
=
. 5
11
. 5
×
11
. 1
3
3 .
225
Vo
1.225
×
(
×
(100
100
10
Δ
+
10
+
Δ
)
−
)
511
10
−
511
−
Δ
10
2 .
−
10
=
90
2 .
.
(
12
K
(
Ω
K
)
Ω
)
10