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

Push-Pull Low Power Transformer

TEL: (818) 892-0761

FAX: (818) 894-5791

http://www.pca.com

PCA ELECTRONICS, INC.

16799 SCHOENBORN ST.

NORTH HILLS, CA 91343

• Designed for use with Maxim Max845

• Used in SMPS Push-Pull Topology

• UL 94V-0 Recognized Components

• UL 1446 Class B Insulation System

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

• Switching Frequency : 250 KHz-1 Mhz

• 8 Pin SOIC PCMCIA Package

• 700 Vdc Minimum Isolation

• Very Low Core Loss

EPC3117S-X & EPC3117S-X-LF

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

CSC3117S & -LF

Rev. 3

3/21/06 FT

Schematic

1

2

3

4

5

6

7

8

Pri.

Sec.

Package

Pin 1

I.D.

.150

(3.81)

.088 Max. (2.24)

.270

(6.86)

.050

(1.27)

.025

(.635)

.290

(7.37)

.018/.022

(.457/.559)

.090

(2.29)

.050

(1.27)

.030

(.762)

.420

(10.67)

.365

(9.27)

Marking :

PCA

EPC3117S(-LF)

Date Code

Pad

Layout

.070

(1.78)

0°-8°

.008/.012

(.203/.304)

.003/.010

(.076/.254)

Voltage

(V)

PCA

Part

Number

EPC3117S-1(-LF)

EPC3117S-2(-LF)

*EPC3117S-3(-LF)

*EPC3117S-4(-LF)

EPC3117S-5(-LF)

EPC3117S-6(-LF)

EPC3117S-7(-LF)

EPC3117S-8(-LF)

Primary

OCL

(µH Typ.)

150

375

375

375

375

375

150

375

375

375

@ 100 KHz, 0.1 Vrms

75

75

75

75

80

80

75

75

80

75

Duty Cycle

(%)

3.3

5

5

5

5

5

3.3

5

5

5

V in

5

5

10

10

12

24

5

5

12

15

V out

† Output Center Tap

† Output Center Tap

Voltage Doubler

† Output Center Tap

† Output Center Tap

Voltage Doubler

Voltage Doubler

Voltage Doubler

Voltage Doubler

Voltage Doubler

Rectification

(Half or Full Wave)

Connections

Turns

Ratio

(Pri. to Sec.)

1:1:2:2

1:1:1.3:1.3

1:1:1.3:1.3

1:1:2.67:2.67

1:1:3:3

1:1:3:3

1:1:1:1

1:1:.67:.67

1:1:1.5:1.5

1:1:2:2

Pri. :Sec.

7.1

11

11

11

11

11

7.1

11

11

11

ET

(V-µSec.)

@ 350 KHz

*.098 Max. (2.49) for EPC3117S-3/-4

{

{

Application

• † Connections : Output Center Tap as Common/Return • Operating Temperature : -40°C to +85°C •

Notes :

2. Peak Temperature Rating

3. Weight

4. Packaging Information

(Tube)

EPC3117S

SnPb

225°C

(10 +2/-0) Seconds

TBD grams

TBD pcs / tube

EPC3117S-LF

Sn100

260°C

(10 +2/-0) Seconds

TBD grams

TBD pcs / tube