S48SP3R310NRFB Delta Electronics, S48SP3R310NRFB Datasheet - Page 9

• Manufacturer Part Number: S48SP3R310NRFB
• Description: MODULE DC/DC 1X1 BRICK 3.3V 10A
• Manufacturer: Delta Electronics
• Series: Delphi S48SPr
• Type: Isolated with Remote On/Off and UVLOr

Specifications of S48SP3R310NRFB

• Operating Temperature: -40°C ~ 110°C
• Power (watts) - Rated: 33W
• Efficiency: 90%
• Approvals: CE, cUL, TUV, UL
• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 35W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 6-DIP Module, 1x1 Brick
• 1st Output: 3.3 VDC @ 10A
• Size / Dimension: 1.30" L x 0.96" W x 0.34" H (33mm x 24.4mm x 8.55mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 2nd Output: -
• 3rd Output: -
• 4th Output: -
• Other names: 941-1043

DS_S48SP3R310_05222008
FEATURES DESCRIPTIONS (CON.)
Output Voltage Adjustment
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 Vo(+) or
Vo(-). The TRIM pin should be left open if this feature
is not used.
Figure 17: Circuit configuration for trim-down (decrease
output voltage)
If the external resistor is connected between the TRIM
and Vo(+) pins, the output voltage set point decreases
(Fig. 17). The external resistor value required to obtain
an output voltage change from 3.3V to the desired
Vo_adj is defined as:
Ex. When Trim-down -10%
Vo_adj=3.3V×(1-10%)=2.97V
Rtrim_down
Rtrim_down
Rtrim_down
ON/OFF
ON/OFF
ON/OFF
Vi (-)
Vi (-)
Vi (-)
Vi (+)
Vi (+)
Vi (+)
=
5.228 10
Vo (-)
Vo (-)
Vo (-)
Trim
Trim
Trim
Vo (+)
Vo (+)
Vo (+)
(
(
Vo_adj
2.97
×
3.3
3.3
3
−
−
ohm
−
2.5
−
Vo_adj
2.97
2.5
) 5110
⋅
) 5110
⋅
R
R
R
trim-down
trim-down
trim-down
−
−
2050
2050
R
R
Load
Load
Figure 18: Circuit configuration for trim-up (increase output
voltage)
If the external resistor is connected between the TRIM
and Vo(-) the output voltage set point increases (Fig.
18). The external resistor value required to obtain an
output voltage change from 3.3V to the desired Vo_adj
is defined as:
Ex. When Trim-up +10%
Vo_adj=3.3V×(1+10%)=3.63V
When using trim function, 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_up
Rtrim_up
Rtrim_up
ON/OFF
ON/OFF
Vi (-)
Vi (-)
Vi (+)
Vi (+)
=
3.666 10
Vo_adj
3.63
Vo (-)
Vo (-)
Trim
Trim
Vo (+)
Vo (+)
2.5 5110
2.5 5110
×
⋅
⋅
4
−
−
ohm
3.3
3.3
−
−
2050
2050
R
R
trim-up
trim-up
R
R
Load
Load
9