Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833

603-778-2300 www.wallindustries.com Fax 603-778-9797

JFC Series

Single & Dual Outputs

15 Watt DC/DC Converter

2:1 Wide Input Voltage Range

Rev D

OUTPUT VOLTAGE 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 +OUTPUT or -OUTPUT pins. With an

external resistor between the TRIM and -OUTPUT pin, the output voltage set point increases. With an external resistor

between the TRIM and +OUTPUT pins, the output voltage set point decreases. The external TRIM resistor needs to be at

least 1/16W resistors.

Trim Up

Trim Down

(

)

,

U

O up

G L

R

H

V

L

K

×

=

−

Ω

−

−

)

(

)

(

)

,

,

O down

D

O

O down

V

L

G

R

H

V

V

−

×

=

−

Ω

−

TRIM CONSTANTS

Module

G

H

K

L

JFCXXS3.3-4000

5110

2050

0.8

2.5

JFCXXS5-4000

5110

2050

2.5

2.5

JFCXXS12-4000

10000

5110

9.5

2.5

JFCXXS15-4000

10000

5110

12.5

2.5

TRIM CONSTANTS

Module

G

H

K

L

JFCXXS3.3-4000

5110

2050

0.8

2.5

JFCXXS5-4000

5110

2050

2.5

2.5

JFCXXS12-4000

10000

5110

9.5

2.5

JFCXXS15-4000

10000

5110

12.5

2.5

JFCXXS3.3-4000

JFCXXS5-3000

Trim

Trim

1%

3.333V

385.071kΩ

1%

5.050V

253.450kΩ

2%

3.366V

191.511kΩ

2%

5.100V

125.700kΩ

3%

3.399V

126.990kΩ

3%

5.150V

83.117kΩ

4%

3.432V

94.730kΩ

4%

5.200V

61.825kΩ

5%

3.465V

75.374kΩ

5%

5.250V

49.050kΩ

6%

3.498V

62.470kΩ

6%

5.300V

40.533kΩ

7%

3.531V

53.253kΩ

7%

5.350V

34.450kΩ

8%

3.564V

46.340kΩ

8%

5.400V

29.888kΩ

9%

3.597V

40.963kΩ

9%

5.450V

26.339kΩ

10%

3.630V

36.662kΩ

10%

5.500V

23.500kΩ

JFCXXS3.3-4000

JFCXXS5-3000

Trim

Trim

1%

3.267V

116.719kΩ

1%

4.950V

248.340kΩ

2%

3.234V

54.779kΩ

2%

4.900V

120.590kΩ

3%

3.201V

34.133kΩ

3%

4.850V

78.007kΩ

4%

3.168V

23.810kΩ

4%

4.800V

56.715kΩ

5%

3.135V

17.616kΩ

5%

4.750V

43.940kΩ

6%

3.102V

13.486kΩ

6%

4.700V

35.423kΩ

7%

3.069V

10.537kΩ

7%

4.650V

29.340kΩ

8%

3.036V

8.325kΩ

8%

4.600V

24.778kΩ

9%

3.003V

6.604kΩ

9%

4.550V

21.229kΩ

10%

2.970V

5.228kΩ

10%

4.500V

18.390kΩ

JFCXXS12-1300

JFCXXS15-1000

Trim

Trim

1%

12.120V

203.223kΩ

1%

15.150V

161.557kΩ

2%

12.240V

99.057kΩ

2%

15.300V

78.223kΩ

3%

12.360V

64.334kΩ

3%

15.450V

50.446kΩ

4%

12.480V

46.973kΩ

4%

15.600V

36.557kΩ

5%

12.600V

36.557kΩ

5%

15.750V

28.223kΩ

6%

12.720V

29.612kΩ

6%

15.900V

22.668kΩ

7%

12.840V

24.652kΩ

7%

16.050V

18.700kΩ

8%

12.960V

20.932kΩ

8%

16.200V

15.723kΩ

9%

13.080V

18.038kΩ

9%

16.350V

13.409kΩ

10%

13.200V

15.723kΩ

10%

16.500V

11.557kΩ

JFCXXS12-1300

JFCXXS15-1000

Trim

Trim

1%

11.880V

776.557kΩ

1%

14.850V

818.223kΩ

2%

11.760V

380.723kΩ

2%

14.700V

401.557kΩ

3%

11.640V

248.779kΩ

3%

14.550V

262.668kΩ

4%

11.520V

182.807kΩ

4%

14.400V

193.223kΩ

5%

11.400V

143.223kΩ

5%

14.250V

151.557kΩ

6%

11.280V

116.834kΩ

6%

14.100V

123.779kΩ

7%

11.160V

97.985kΩ

7%

13.950V

103.938kΩ

8%

11.040V

83.848kΩ

8%

13.800V

89.057kΩ

9%

10.920V

72.853kΩ

9%

13.650V

77.483kΩ

10%

10.800V

64.057kΩ

10%

13.500V

68.223kΩ