Power over Ethernet (PoE/PD)
Flyback Transformer
E L E C T R O N I C S I N C .
EPC3248G-X & EPC3248G-X-LF
• Used in SMPS DC/DC Converter as a Flyback
Transformer in PoE/Powered Devices (PD)
• Switching Frequency : 300 KHz to 400 KHz
• Add “-LF” after part number for Lead Free
* 40 % Duty Cycle Typ. @ 48 V Input
• UL 94V-0 Recognized Components
• UL 1446 Class B Insulation System
• Low Core Loss Material
Electrical Specifications @ 25°C
Part
Chipset
PoE
PD
Class
Voltage
Primary OCL
(µH ± 10%)
@ 300 KHz,
0.1 Vrms
Current
Package Schematic
Type
Number
Class
Power
(Watts)
Usage
(Vdc)
(Amp.)
Fb
Fb
V In
36-57
36-57
V Out
3.3
Min.
Max.
Bias
Sec 1 Bias
EPC3248G-1
EPC3248G-2
EPC3248G-3
EPC3248G-4
EPC3248G-5
EPC3248G-6
EPC3248G-7
EPC3248G-8
EPC3248G-9
EPC3248G-10
EPC3248G-11
EPC3248G-12
EPC3248G-13
EPC3248G-14
EPC3248G-15
DPA425
DPA425
DPA425
DPA423
DPA423
DPA423
DPA424
DPA424
DPA424
DPA424/5
DPA424/5
DPA424/5
DPA426
DPA426
DPA426
0
0.44 12.95
0.44 12.95
0.44 12.95
ER14.5
ER14.5
ER14.5
ER9.5
ER9.5
ER9.5
ER11
1
1
1
2
2
2
1
1
1
1
1
1
3
3
3
Default
Default
Default
13.2
120
120
120
200
200
200
120
120
120
120
120
120
25
3.92 .050
2.59 .050
1.08 .050
1.16 .050
0.77 .050
0.32 .050
1.97 .050
1.30 .050
0.54 .050
3.92 .050
2.59 .050
1.08 .050
12.12 .050
0
5.0 13.33
0
36-57 12.0 12.0
1
0.44
0.44
0.44
3.84
3.84
3.84
3.84
3.84
3.84
6.49
6.49
6.49
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Reserved
Reserved
Reserved
36-57
36-57
3.3
13.2
1
5.0 13.33
1
36-57 12.0 12.0
2
36-57
36-57
3.3
5.0
13.2
13.0
2
ER11
ER11
2
36-57 12.0 12.0
3
6.49 12.95
6.49 12.95
6.49 12.95
Reserved
Reserved
Reserved
ER14.5
ER14.5
ER14.5
EFD20
EFD20
EFD20
36-57
36-57
3.3
5.0
13.2
13.2
3
3
36-57 12.0 12.0
4(PoEP)
4(PoEP)
4(PoEP)
36-57
36-57
3.3
5.0
13.2
13.2
25
25
8.0
.050
36-57 12.0 12.0
3.33 .050
•
Isolation : Pri., Bias to Sec. ; 1500 Vrms
• Isolation : Pri. to Bias ; 500 Vrms •
Note : Class 4 is currently reserved for Power over Ethernet Plus (PoEP) and should not be used at this time.
Notes :
EPC3248-X
EPC3248-X-LF
1. Assembly Process (Solder Composition)
SnPb
Pb-Free
2. Peak Solder Rating
225°C
1
260°C
1
(per IPC/JEDEC-J-STD-020C)
3. Moisture Sensitive Levels (MSL)
(per IPC/JEDEC-J-STD-020C)
(Unlimited, £30°C/60%RH) (Unlimited, £30°C/60%RH)
4. Weight
TBD grams
TBD grams
5. Packaging Information
(Tube)
TBD pcs / tube
TBD pcs / tube
Schematic 1
Schematic 2
Schematic 3
(Reserved for Class 4 PoEP)
1
1
12
11
1
10
8
V In
V In (Pins 1-3)
[36-57 Vdc]
V In (Pins 1-3)
[36-57 Vdc]
2
3
4
5
2
3
5
6
[36-57 Vdc]
10
Sec. 1
9
9
Sec. 1
7
7
Sec. 1
6
2
3
Fb/Bias
[13.2 V/0.05 A]
Fb/Bias
[13.2 V/0.05 A]
Fb/Bias
[13.2 V/0.05 A]
8
7
4
6
5
Note :
Note :
Note :
1. Input Pins : Pins 1 & 3
1. Input Pins : Pins 1 & 2
1. Input Pins : Pins 1 & 3
2. Connect Pins 9,10 and 6,7 in
user board for higher power
2. Connect Pins 8,7 and 5,6 in
user board for higher power
2. Connect Pins 12,11,10 and 9,8,7
in user board for higher power
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.
CSC3248G-X & -LFa Rev. 3 9/26/05 FT
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com