E L E C T R O N I C S I N C .

Power over Ethernet (PoE/PD)

Flyback Transformer

TEL: (818) 892-0761

FAX: (818) 894-5791

http://www.pca.com

PCA ELECTRONICS, INC.

16799 SCHOENBORN ST.

NORTH HILLS, CA 91343

• Used in SMPS DC/DC Converter as a Flyback

Transformer in PoE/Powered Devices (PD)

• Switching Frequency : 300 KHz to 400 KHz

• Add “-LF” after part number for Lead Free

* 40 % Duty Cycle Typ. @ 48 V Input

• UL 94V-0 Recognized Components

• UL 1446 Class B Insulation System

• Low Core Loss Material

EPC3248G-X & EPC3248G-X-LF

Product performance is limited to specified parameters. Data is subject to change without prior notice.

Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25

CSC3248G-X & -LFa

Rev. 3

9/26/05 FT

Electrical Specifications @ 25°C

PoE

Class

0

0

0

1

1

1

2

2

2

3

3

3

4(PoEP)

4(PoEP)

4(PoEP)

Current

(Amp.)

Part

Number

EPC3248G-1

EPC3248G-2

EPC3248G-3

EPC3248G-4

EPC3248G-5

EPC3248G-6

EPC3248G-7

EPC3248G-8

EPC3248G-9

EPC3248G-10

EPC3248G-11

EPC3248G-12

EPC3248G-13

EPC3248G-14

EPC3248G-15

Chipset

DPA425

DPA425

DPA425

DPA423

DPA423

DPA423

DPA424

DPA424

DPA424

DPA424/5

DPA424/5

DPA424/5

DPA426

DPA426

DPA426

PD

Power

(Watts)

ER14.5

ER14.5

ER14.5

ER9.5

ER9.5

ER9.5

ER11

ER11

ER11

ER14.5

ER14.5

ER14.5

EFD20

EFD20

EFD20

Package

Type

1

1

1

2

2

2

1

1

1

1

1

1

3

3

3

Schematic

Default

Default

Default

Optional

Optional

Optional

Optional

Optional

Optional

Optional

Optional

Optional

Reserved

Reserved

Reserved

Class

Usage

Notes :

2. Peak Solder Rating

(per IPC/JEDEC-J-STD-020C)

4. Weight

5. Packaging Information

(Tube)

EPC3248-X

SnPb

225°C

TBD grams

TBD pcs / tube

3. Moisture Sensitive Levels (MSL)

(per IPC/JEDEC-J-STD-020C)

1

(Unlimited,

≤30°C/60%RH)

EPC3248-X-LF

Pb-Free

260°C

TBD grams

TBD pcs / tube

1

(Unlimited,

≤30°C/60%RH)

Primary OCL

(µH ± 10%)

@ 300 KHz,

0.1 Vrms

120

120

120

200

200

200

120

120

120

120

120

120

25

25

25

12.95

12.95

12.95

3.84

3.84

3.84

6.49

6.49

6.49

12.95

12.95

12.95

Max.

0.44

0.44

0.44

0.44

0.44

0.44

3.84

3.84

3.84

6.49

6.49

6.49

Min.

Voltage

(Vdc)

.050

.050

.050

.050

.050

.050

.050

.050

.050

.050

.050

.050

.050

.050

.050

Fb

Bias

3.92

2.59

1.08

1.16

0.77

0.32

1.97

1.30

0.54

3.92

2.59

1.08

12.12

8.0

3.33

Sec 1

13.2

13.33

12.0

13.2

13.33

12.0

13.2

13.0

12.0

13.2

13.2

12.0

13.2

13.2

12.0

Fb

Bias

36-57

36-57

36-57

36-57

36-57

36-57

36-57

36-57

36-57

36-57

36-57

36-57

36-57

36-57

36-57

V In

3.3

5.0

12.0

3.3

5.0

12.0

3.3

5.0

12.0

3.3

5.0

12.0

3.3

5.0

12.0

V Out

• Isolation : Pri., Bias to Sec. ; 1500 Vrms • Isolation : Pri. to Bias ; 500 Vrms •

Note :

1. Input Pins : Pins 1 & 3

2. Connect Pins 9,10 and 6,7 in

user board for higher power

Schematic 1

V In (Pins 1-3)

[36-57 Vdc]

10

5

2

1

9

7

6

3

4

Sec. 1

Fb/Bias

[13.2 V/0.05 A]

Note :

1. Input Pins : Pins 1 & 3

2. Connect Pins 12,11,10 and 9,8,7

in user board for higher power

Schematic 3

(Reserved for Class 4 PoEP)

V In (Pins 1-3)

[36-57 Vdc]

11

6

2

1

10

8

7

3

5

Sec. 1

Fb/Bias

[13.2 V/0.05 A]

9

12

Reserved

Reserved

Reserved

Note : Class 4 is currently reserved for Power over Ethernet Plus (PoEP) and should not be used at this time.

Note :

1. Input Pins : Pins 1 & 2

2. Connect Pins 8,7 and 5,6 in

user board for higher power

Schematic 2

V In

[36-57 Vdc]

8

4

2

1

7

6

5

3

Sec. 1

Fb/Bias

[13.2 V/0.05 A]