Flyback Power Transformer
EPC3127-X & EPC3127-X-LF
ELECTRONICS INC.
• Used in SMPS Flyback Topology
• Designed for use with Power Integration Chip
• Reinforced Insulation (Triple Insulated Wire)
• Add “-LF” after part number for Lead-Free
• UL 94V-0 Recognized Components
• UL 1446 Class F Insulation System
• Very Low Core Loss
Electrical Parameters @ 25° C
PCA
Part
Number
Chipset
Voltage
(Vdc)
V In
EPC3127-1(-LF)
{
L Prim.
[Pins 2-1]
(µH ± 10%)
V Out
2
V Out
1
Fb
@ 10 KHz,
0.1 Vrms
TNY268P
TNY266P
TOP232Y/TOP242Y
TOP244P
TNY267
--120-375
5
15
1900
--120-375
5
15
1900
3.3
120-375
5
15
2400
--120-375
13.55
15
475
--120-375
3.3
15
2800
• Switching Frequency : 132 KHz • Isolation : 4500 Vrms •
EPC3127-2(-LF)
EPC3127-3(-LF)
EPC3127-4(-LF)
Schematic
Current
(Adc)
V Out
1
V Out
2
----2
-----
3.0
2.0
2.0
1.2
2.0
Fb
.05
.05
.05
.05
.05
A
A
B
A
A
Dielectric Rating
(Vrms)
1 sec. 4500 or 60 sec. 3750
1 sec. 4500 or 60 sec. 3750
Between V Out Wdg’s to Core
V In Wdg to all V Out Wdg’s & Core
Notes :
EPC3127-X
EPC3127-X-LF
1. Lead Finish
2. Peak Solder Rating
(Wave Solder Only)
3. Weight
4. Packaging Information Tray :
1 sec. 1500
Between V In Wdg & Fb Wdg
Schematic A
SnPb
Hot Tin Dip (Sn)
260°C
10 (+2/-0) seconds
260°C
10 (+2/-0) seconds
TBD grams
TBD grams
TBD pieces/tray
TBD pieces/tray
Schematic B
1
V In
1
8
2
7
3
6
4
5
V In
2
8
3
7
V Out 1
V Out 1
Fb
Fb
4
V Out 2
Package
.787
(20.00)
.728
Max.
(18.50)
.138
(3.50)
.815
(20.70)
Pin 1 I.D.
.552
Max.
(14.00)
.590
(15.00)
PCA
EPC3127-X(-LF)
D.C.
.197
(5.00)
.031 Ø
(.800)
.063
(1.60)
.590
Typ.
(15.00)
.197
(5.00)
.590
Typ.
(15.00)
1
8
2
7
3
6
4
5
.590
(15.00)
.051
(1.30)
Component Side
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.
CSC3127-X & -LF
Rev. 8
2/22/07 RR
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com