Push-Pull Low Power Transformer
ELECTRONICS INC.
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
• 700 Vdc Minimum Isolation
• Very Low Core Loss
Electrical Parameters @ 25° C
PCA
Part
Number
Voltage
(V)
Primary
OCL
(µH Typ.)
Turns
Ratio
(Pri. to Sec.)
ET
(V-µSec.)
Duty Cycle
(%)
Rectification
(Half or Full Wave)
V out
V in
@ 100 KHz, 0.1 Vrms
Pri. :Sec.
@ 350 KHz
Connections
75
EPC3117S-1(-LF)
3.3
5
150
1:1:2:2
7.1
† Output Center Tap
75
EPC3117S-2(-LF)
5
5
375
1:1:1.3:1.3
11
† Output Center Tap
75
5
10
375
1:1:1.3:1.3
11
Voltage Doubler
75
*EPC3117S-3(-LF)
5
10
375
1:1:2.67:2.67
11
† Output Center Tap
80
*EPC3117S-4(-LF)
5
12
375
1:1:3:3
11
† Output Center Tap
80
5
24
375
1:1:3:3
11
Voltage Doubler
75
EPC3117S-5(-LF)
3.3
5
150
1:1:1:1
7.1
Voltage Doubler
75
EPC3117S-6(-LF)
5
5
375
1:1:.67:.67
11
Voltage Doubler
80
EPC3117S-7(-LF)
5
12
375
1:1:1.5:1.5
11
Voltage Doubler
75
EPC3117S-8(-LF)
5
15
375
1:1:2:2
11
Voltage Doubler
• † Connections :
Output Center Tap as Common/Return
• Operating Temperature :
-40°C to +85°C
•
{
{
Package
.290
(7.37)
.070
(1.78)
.050
(1.27)
.090
(2.29)
4
SD
PCA
EPC3117S(-LF)
Date Code
Application
V in 5V
6
Vcc
D1
1
C1
CR1
Output
5V
@ 150 mA
.270
(6.86)
.420 Pad
(10.67) Layout
3
Pin 1
I.D.
.150
(3.81)
*.098 Max. (2.49) for EPC3117S-3/-4
.003/.010
(.076/.254)
0°-8°
.008/.012
(.203/.304)
.030
(.762)
MAXIM
MAX845
FS
Gnd1
2
D2
Gnd2
7
CR2
8
T1
Frequency
Select
C2
C3
.088 Max. (2.24)
.050
(1.27)
.018/.022
(.457/.559)
Coplanarity within .004 Max.
Notes :
1.
Final Lead Finish
2. Peak Temperature Rating
3. Weight
4. Packaging Information
(Tube)
(Tape & Reel)
Schematic
.025
(.635)
.365
(9.27)
Pri.
1
2
3
EPC3117S
SnPb
225°C
0.27 grams
65 pcs / tube
1200 pcs / 13”reel
EPC3117S-LF
Hot Dipped Sn or SnCn
260°C
0.27 grams
65 pcs / tube
1200 pcs / 13”reel
Sec.
8
7
6
5
4
Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
Product performance is limited to specified parameters. Data is subject to change without prior notice.
CSC3117S & -LF
Rev. 5
12/11/08 JDG
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com
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