Push-Pull Low Power Transformer
EPC3117S-X & EPC3117S-X-LF
• Designed for use with Maxim MAX 845
• 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
E L E C T R O N I C S I N C .
• 700 Vdc Minimum Isolation
• Very Low Core Loss
Electrical Parameters @ 25° C
PCA
Part
Number
Duty Cycle
Voltage
(V)
Primary
Turns
Ratio
(Pri. to Sec.)
ET
(V-µSec.)
Rectification
(Half or Full Wave)
(%)
OCL
(µH Typ.)
V out
V in
@ 100 KHz, 0.1 Vrms
Pri. :Sec.
@ 350 KHz
Connections
75
75
75
75
80
80
75
75
80
75
EPC3117S-1(-LF)
EPC3117S-2(-LF)
3.3
5
5
5
10
10
12
24
5
5
12
15
150
375
375
375
375
375
150
375
375
375
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
7.1
11
11
11
11
11
7.1
11
11
11
† Output Center Tap
† Output Center Tap
Voltage Doubler
{
{
5
*EPC3117S-3(-LF)
*EPC3117S-4(-LF)
5
† Output Center Tap
† Output Center Tap
Voltage Doubler
5
5
1:1:3:3
EPC3117S-5(-LF)
EPC3117S-6(-LF)
EPC3117S-7(-LF)
EPC3117S-8(-LF)
3.3
5
1:1:1:1
Voltage Doubler
1:1:.67:.67
1:1:1.5:1.5
1:1:2:2
Voltage Doubler
5
5
Voltage Doubler
Voltage Doubler
•
† Connections : Output Center Tap as Common/Return
•
Operating Temperature : -40°C to +85°C
•
Package
Application
.290
(7.37)
V in 5V
.090
(2.29)
.070
.050
(1.27)
(1.78)
C1
4
6
Output
5V
SD
Vcc
CR1
@ 150 mA
1
8
PCA
D1
D2
.270
(6.86)
.420 Pad
EPC3117S(-LF)
Date Code
(10.67)Layout
MAXIM
MAX845
C2
C3
Pin 1
I.D.
3
FS
T1
Frequency
Select
.150
(3.81)
.030
(.762)
Gnd1 Gnd2
2
7
CR2
*.098 Max. (2.49) for EPC3117S-3/-4
.003/.010
(.076/.254)
.008/.012
(.203/.304)
0°-8°
.088 Max. (2.24)
Schematic
.050
(1.27)
.025
Pri.
1
Sec.
(.635)
.018/.022
(.457/.559)
.365
(9.27)
8
2
7
6
Coplanarity within .004 Max.
3
Notes :
EPC3117S
EPC3117S-LF
4
5
1. Final Lead Finish
2. Peak Temperature Rating
SnPb
225°C
Hot Dipped Sn or SnCn
260°C
3. Weight
0.27 grams
65 pcs / tube
1200 pcs / 13”reel
0.27 grams
4. Packaging Information
(Tube)
65 pcs / tube
(Tape & Reel)
1200 pcs / 13”reel
Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25
Product performance is limited to specified parameters. Data is subject to change without prior notice.
CSC3117S & -LF Rev. 5 12/11/08 JDG
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com