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JF48S5-3000 Datasheet, PDF (6/15 Pages) Wall Industries,Inc. – DC/DC Converter | |||
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TECHNICAL DATASHEET
JF48S5-3000
External Trim Adjustment
Output voltage set point adjustment allows the user to increase or decrease the output voltage set point of a
module. This is accomplished by connecting an external resistor between the TRIM pin and either the +Vout or
-Vout pins. With an external resistor between the TRIM and +Vout pin, the output voltage set point decreases.
With an external resistor between the TRIM and -Vout pin, the output voltage set point increases.
Rup
=
5110 â 2.5
Vo+ â 2.5 â 2.5
â
2050
(in â¦)
Vo+ is the desired up output voltage
Rdown
=
(Vo â â 2.5) â 5110
Vout â (Vo â )
â
2050
(in â¦)
Vo- is the desired down output voltage
-Vin
+Vin
Figure 4
-Vout
RT1
Trim
RT2
+Vout
Trim
1%
2%
3%
4%
5%
6%
7%
8%
9%
10%
Table 3 Trim Resistor Values
Vo+
Rup
Voâ
Rdown
5.05V 253.45 k⦠4.95V 248.34 kâ¦
5.1V 125.7 k⦠4.9V 120.59 kâ¦
5.15V 83.117 k⦠4.85V 78.007 kâ¦
5.2V 61.825 k⦠4.8V 56.715 kâ¦
5.25V 49.05 k⦠4.75V 43.940 kâ¦
5.3V 40.533 k⦠4.7V 35.423 kâ¦
5.35V
5.4V
5.45V
34.450 kâ¦
29.888 kâ¦
26.339 kâ¦
4.65V
4.6V
4.55V
29.340 kâ¦
24.778 kâ¦
21.229 kâ¦
5.5V 23.5 k⦠4.5V 18.390 kâ¦
(888) 597-WALL
www.wallindustries.com
Page 6 of 15
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