JF24S15-1000 Datasheet, PDF (6/15 Pages) Wall Industries,Inc. – DC/DC Converter

TECHNICAL DATASHEET
JF24S15-1000
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
=
1.0⁴ ∗ 2.5
Vo⁺ − 2.5 −12.5
− 5110
(in
Ω)
Vo⁺ is the desired up output voltage
Rdown
=
(Vo ^− − 2.5) ∗1.0⁴
Vout − (Vo ^− )
− 5110
(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
15.15V 161.557 kΩ 14.85V 818.223 kΩ
15.3V 78.223 kΩ 14.7V 401.557 kΩ
15.45V 50.446 kΩ 14.55V 262.668 kΩ
15.6V 36.557 kΩ 14.4V 193.223 kΩ
15.75V 28.223 kΩ 14.25V 151.557 kΩ
15.9V 22.668 kΩ 14.1V 123.779 kΩ
16.05V
16.2V
16.35V
18.7 kΩ
15.723 kΩ
13.409 kΩ
13.95V
13.8V
13.65V
103.938 kΩ
89.057 kΩ
77.483 kΩ
16.5V 11.557 kΩ 13.5V 68.223 kΩ
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www.wallindustries.com
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