Rev. C

JF Series

Single Outputs

2:1 Input Voltage Range

15W DC/DC Power Converters

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

11/11/2011

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

Page 4 of 6

CHARACTERISTIC CURVES

JF48S5-3000 Derating Curve

JF48S5-3000 Efficiency vs Input Voltage

JF48S5-3000 Efficiency vs Output Current

-40

-20

0

20

40

60

80

100

120

3.50

3.00

2.50

2.00

1.50

1.00

0.50

0.00

Natural Convection

1.0m/s(200LFM)

2.0m/s(400LFM)

3.0m/s(600LFM)

Ambient Temperature, Ta (°C)

82

83

84

85

86

87

88

89

90

36

40

44

48

52

56

60

64

68

75

Input Voltage, Vin (VDC)

Output Current, Iout (mA)

RECOMMENDED EMI FILTERS

Recommended Filter for EN55022 Class A Compliance

Recommended Filter for EN55022 Class B Compliance

Load

L1

+INPUT

-INPUT

+Vin

+Vout

-Vin

-Vout

DC/DC CONVERTER

C1

C3

C2

+INPUT

-INPUT

C1

C2

C3

L1

L2

C5

C4

LOAD

+Vin

+Vout

-Vin

-Vout

DC/DC CONVERTER

The components used in the figure above are as follows:

The components used in the figure above are as follows:

Recommended EN55022 Class A Filter Circuit Layout

Recommended EN55022 Class B Filter Circuit Layout

MODEL

C1 & C2

C3

C4 & C5

L1

L2

JF24Sxx-xxxx

6.8µF/50V

1812 MLCC

6.8µF/50V

1812 MLCC

470pF/3KV

1808 MLCC

145µH

Common Choke

PMT-051

10µF

SMT Inductor

PMT-047

JF48Sxx-xxxx

2.2µF/100V

1812 MLCC

2.2µF/100V

1812 MLCC

470pF/3KV

1808 MLCC

145µH

Common Choke

PMT-051

18µF

SMT Inductor

PMT-046

MODEL

C1

C2, C3

L1

JF24Sxx-xxxx

6.8µF/50V

1812 MLCC

470pF/3KV

1808 MLCC

10µF

SMT Inductor

PMT-047

JF48Sxx-xxxx

2.2µF/100V

1812 MLCC

470pF/3KV

1808 MLCC

18µF

SMT Inductor

PMT-046