Flyback Power Transformer
ELECTRONICS INC.
EPC3127-X
• 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
Electrical Parameters @ 25° C
PCA
Part
Number
Chipset
Voltage
(Vdc)
V out
1
{
EPC3127-2
EPC3127-3
EPC3127-4
V out
2
V out
3
Schematic
Current
(Amp.)
@ 10 KHz,
0.1 Vrms
Sec.
1
N
TNY268P
120-375
5
1900
15
N
TNY266P
120-375
5
1900
15
3.3
TOP232Y/TOP242Y
120-375
5
2400
15
N
TOP244P
120-375
13.55
475
15
N
TNY267
120-375
3.3
2800
15
• Switching Frequency : 132 KHz • Isolation : 4500 Vrms •
3.0
2.0
2.0
1.2
2.0
V in
EPC3127-1
Primary
OCL
(µH ± 10%)
Sec.
2
N
N
2
N
N
Sec.
3
.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 Sec. Wdg’s to Core
Pri. to all Sec. Wdg’s & Core
1 sec. 1500
Between Pri. Wdg & Bias
• Note : “N” means Not Required/No Connections •
Schematic A
1
Schematic B
8
V in Pri.
1
8
2
7
Sec. 3 3
(Fb/Bias)
4
6
Sec. 1
2
7
Sec. 3 3
(Fb/Bias)
4
6
Pri.
Sec. 2
5
Sec. 1
Sec. 2
5
Package
.787
(20.00)
.815
(20.70)
.728
Max.
(18.50)
.138
(3.50)
.552
Max.
(14.00)
.590
(15.00)
PCA
EPC3127-X
D.C.
.590
(15.00)
.197
(5.00)
.031 Ø
(.800)
.590
Typ.
(15.00)
.063
(1.60)
.197
(5.00)
.051
(1.30)
.590
Typ.
(15.00)
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
Rev. 5
1/3/05 FT
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com