www.pulseeng.com

104

SPM2007 (11/07)

HIGH FREQUENCY WIRE WOUND

TRANSFORMERS

EFD Platforms - EFD15, EFD20 and EFD25

Electrical Specifications @ 25°C — Operating Temperature - 40°C to 125°C

Notes:

1. The temperature of the component (ambient plus temperature rise) must

be within the stated operating temperature range.

2. The above transformers and inductors have been tested and approved

by Pulse's power IC partners and are sited in the appropriate datasheet

or evaluation board documentation at these companies. To determine

which IC and IC partners are matched with the above Pulse part numbers

please consult the IC Cross Reference on the Pulse website.

3. The rated current as listed is either 85% of the saturation current or the

heating current whichever is lower.

4. The saturation current is the current which causes the inductance to drop

by 20% at 25°C. This current is determined by placing the component in

the specified ambient environment and applying a short duration pulse

current (to eliminate self-heating effects) to the component.

5. The heating current is the dc current which causes the temperature of the

part to increase by approximately 40°C.

6. Add 'T' suffix to the part number for Tape & Reel version (ie: PB2041NLT).

7. The "NL" suffix indicates an RoHS-compliant part number. Non-NL

suffixed parts are not necessarily RoHS compliant, but are electrically

and mechanically equivalent to NL versions. If a part number does not

have the "NL" suffix, but an RoHS compliant version is required, please

contact Pulse for availability.

10-PIN SMT

SUGGESTED PAD LAYOUT

.960

24,38

10X .035

0,90

.098

2,50

.680

17,27

.392

9,96

10X .028

0,71

.098

2,50

.850

21,59

MAX

.640

16,26

MAX

Part Number

Date Code

Country of Origin

.392

9,96

.062 ± .006

1,57 ± 0,15

10X

10X 0°- 8°

.005/0,13

10 SURFACES

.010

0,25

.330 MAX

8,38

12X .072

1,83

.004/0,10

12 SURFACES

.010 ± .002

0,25 ± 0,05

.330 MAX

8,38

SUGGESTED PAD LAYOUT

.900

22,86

10X .035

0,90

.490

12,45

.098

2,50

.722

18,34

12-PIN SMT

Part Number

Date Code

Country of Origin

.875

22,23

MAX

.675

17,15

MAX

12X .028

0,71

.490

12,45

.098

2,50

Mechanicals

EFD 15

TRANSFORMERS

(continued)

Turns Ratio

Primary

Primary

Leakage

DCR (m

Ω MAX)

Number

Secondary

Inductance

Inductance

Pri.

Pri.

Sec.

Sec.

Pri.

Sec. Pri. Aux.

Isolation

(µH MIN)

(µH MAX)

Aux.

A

B

100W Forward Transformer

1500Vdc

PA0397NL

Vin=36-75v, Freq.=250kHz

9

2

8

Basic

113

0.64

21

570

3.3

N/A

Vout=3.3v/30A, 12v/0.1A

165 F-Bridge Transformer

500Vrms

PA0302NL

Vin=21-56v, Freq.=230kHz

1

1

1

Operational

24

0.1

8

130

8

8

Vout=15v/11A

72W Forward Transformer

2250Vrms

PA0700NL

Vin=12v, Freq.=250kHz

3

22

N/A

Operational

21.4

0.5

4

N/A

95

N/A

Vout=48v/1.5A

INDUCTORS

Induct.

Induct.

Saturation

Heating

±12v

@ Irated

Irated

Turns Ratio

DCR (m

Ω MAX)

Winding

Number

(µH MIN)

(Adc)

Winding

Winding

Winding

(µH ±7%)

@25°

(A)

to Aux.

12

3

Isolation

Output Inductor

3:3:4

29.2

87.6

253

1500

PB2042NL

for PB2041

13

4

(+12v:-12v:Aux)

(+12v)

(+12v)

(15v Aux.)

14.4

5

4

Vrms

Transformer

Basic