JF24S5-3000 Datasheet, PDF (6/15 Pages) Wall Industries,Inc. – DC/DC Converter

TECHNICAL DATASHEET
JF24S5-3000
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 ∗ 2.5
Vo⁺ − 2.5 − 2.5
−
2050
(in Ω)
Vo⁺ is the desired up output voltage
Rdown
=
(Vo ^− − 2.5) ∗ 5110
Vout − (Vo ^− )
−
2050
(in Ω)
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⁺
R_up
Vo^–
R_down
5.05V 253.45 kΩ 4.95V 248.34 kΩ
5.1V 125.7 kΩ 4.9V 120.59 kΩ
5.15V 83.117 kΩ 4.85V 78.007 kΩ
5.2V 61.825 kΩ 4.8V 56.715 kΩ
5.25V 49.05 kΩ 4.75V 43.940 kΩ
5.3V 40.533 kΩ 4.7V 35.423 kΩ
5.35V
5.4V
5.45V
34.450 kΩ
29.888 kΩ
26.339 kΩ
4.65V
4.6V
4.55V
29.340 kΩ
24.778 kΩ
21.229 kΩ
5.5V 23.5 kΩ 4.5V 18.390 kΩ
(888) 597-WALL
www.wallindustries.com
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