SMT flyback transformers

EFD series

B82802A

Technical data and measuring conditions

36 V DC … 60 V DC

1500 V AC

Main inductance L

100 kHz, 100 mV, +25 °C

Inductance tolerance

±10% at +25 °C

Operating frequency f

100 kHz

Measured at +25 °C, maximum values (specified per winding)

Solderability

≥

99.9 Sn or Sn96.5Ag3.0Cu0.5: +(245± 5) °C, (3±0.3) s

Wetting of soldering area: ≥95% (to IEC 60068-2-58)

Operating temperature range

–40°C … +125°C

Characteristics and ordering codes

Ordering code

Core

Schematic L

Pri

Sec

μH μH

B82802A0012A215

EFD15 Fig 1

100 3.0

(1-10):(2-9):(5-4)

1:2.25:6.5

0.03

0.19

0.45 -

B82802A0012A315

EFD15 Fig 2

100 3.0

(1-10):(2-9):(3-8):(5-4)

1:2.5:0.75:7.5

0.05

0.37

0.43 0.03

B82802A0030A220

EFD20 Fig 3

40

1.5

(1-10):(2-9):(5-4)

1:2.25:6.5

0.015 0.04

0.1

-

B82802A0030A320

EFD20 Fig 4

40

1.8

(1-10):(2-9):(3-8):(5-4) 1:2.25:0.75:6.5 0.018 0.04

0.1

0.01

B82802A0055A225

EFD25 Fig 5

22

1.5

(1-10):(2-9):(5,4-7)

1:2.5:7.5

0.003 0.04

0.03 -

B82802A0055A325

EFD25 Fig 6

22

1.2

(1-10):(2-9):(3-8):(5-4) 1:2.33:0.66:6.67 0.015 0.04

0.05 0.003

Ordering code

Core

Schematic

Power

W

V/A

V/A

V/A

B82802A0012A215

EFD15

Fig 1

12

12/0.5

5.0/1.2

-

B82802A0012A315

EFD15

Fig 2

12

5.0/0.8

3.3/1.2

12/0.33

B82802A0030A220

EFD20

Fig 3

30

12/1.25

5.0/3.0

-

B82802A0030A320

EFD20

Fig 4

30

5.0/2.0

3.3/3.0

12/0.83

B82802A0055A225

EFD25

Fig 5

55

12/2.3

5.0/5.5

-

B82802A0055A325

EFD25

Fig 6

55

5.0/3.7

3.3/5.5

12/1.5

EPCOS Ho PD

October 2012

Please read Cautions and warnings and

Page 4 of 7

Important notes at the end of this document.