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

Flyback Power Transformer

TEL: (818) 892-0761

FAX: (818) 894-5791

http://www.pca.com

PCA ELECTRONICS, INC.

16799 SCHOENBORN ST.

NORTH HILLS, CA 91343

EPC3129-X

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

Electrical Parameters @ 25° C

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

CSC3129-X

Rev. 1

4/9/03 FT

Package

Voltage

(Vdc)

Primary

OCL

(µH ± 10%)

876

1000

@ 10 KHz,

0.1 Vrms

TOP244Y

TOP243P

Chipset

120-375

120-375

V in

12

5

V out

1

Current

(Amp.)

• Note : “N” means Not Required/No Connections •

PCA

Part

Number

EPC3129-1

EPC3129-2

Schematic A

1

3

4

56

7

9

10

V in Pri.

Sec. 3

(Fb/Bias)

Sec. 1

Sec. 2

Schematic B

N

3.3

V out

2

15

15

V out

3

2.5

0.9

Sec.

1

N

1.5

Sec.

2

.05

.05

Sec.

3

A

B

Schematic

Dielectric Rating

(Vrms)

Between Sec. Wdg’s to Core

1 sec. 4500 or 60 sec. 3750

Pri. to all Sec. Wdg’s & Core

1 sec. 4500 or 60 sec. 3750

Between Pri. Wdg & Bias

1 sec. 1500

---

30

V out

4

---

.03

Sec.

4

1

3

4

5

6

7

9

10

Pri.

Sec. 3

(Fb/Bias)

Sec. 4

Sec. 2

Sec. 1

* Shield is optional

1.130

(28.80)

.846

Max.

(21.50)

.138

(3.50)

.028 Sq.

(.700)

.197

(5.00)

.197

(5.00)

.051

(1.30)

.787

(20.00)

Suggested

Layout

1.130

(28.80)

.787

Typ.

(20.00)

PCA

EPC3129-X

D.C.

• Used in SMPS Flyback Topology

• Designed for use with Power Integration Chip

• Reinforced Insulation (Triple Insulated Wire)

• UL 94V-0 Recognized Components

• UL 1446 Class F Insulation System

• Very Low Core Loss

• Switching Frequency : 132 KHz • Isolation : 4500 Vrms •