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
• Input Voltage : 36-57 VDC
• 40 % Duty Cycle Typ. @ 48 VDC Input Voltage
• UL 94V-0 Recognized Materials
• UL 1446 Class B Insulation System
• Storage Temperature : -40°C to +125°C
• Operating Temperature : -40°C to +85°C
Electrical Specifications @ 25°C
Part
Number
Chipset
PoE
Class
PD
Class
Usage
Voltage
Current
Primary OCL
Le
Package Schematic
Type
Power
(Watts)
(Vdc)
(Amp.)
(µH ± 10%) (µH Max.)
@ 300 KHz, @ 300 KHz,
Fb
Fb
0.1 Vrms
0.1 Vrms
Min.
Max.
V Out Bias V Out Bias
EPC3248G-1
EPC3248G-2
EPC3248G-3
EPC3248G-4
EPC3248G-5
EPC3248G-6
EPC3248G-7
EPC3248G-8
EPC3248G-9
EPC3248G-10 DPA424/5
EPC3248G-11 DPA424/5
EPC3248G-12 DPA424/5
EPC3248G-13
EPC3248G-14
EPC3248G-15
DPA425
DPA425
DPA425
DPA423
DPA423
DPA423
DPA424
DPA424
DPA424
0
0.44 12.95
0.44 12.95
0.44 12.95
Default
Default
3.3
13.2
3.92
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
120
120
120
200
200
200
120
120
120
120
120
120
25
2.5
2.5
2.5
2.5
2.5
2.5
3.5
3.5
3.5
2.5
2.5
2.5
4.0
4.0
4.0
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
0
5.0 13.33 2.59
0
Default
12.0 12.0
3.3 13.2
1.08
1.16
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
1
5.0 13.33 0.77
1
12.0 12.0
0.32
1.97
1.30
0.54
3.92
2.59
1.08
2
3.3
5.0
13.2
13.0
2
ER11
2
12.0 12.0
ER11
3
6.49 12.95
6.49 12.95
6.49 12.95
Reserved
Reserved
Reserved
3.3
5.0
13.2
13.2
ER14.5
ER14.5
ER14.5
EFD20
EFD20
EFD20
3
3
12.0 12.0
DPA426
DPA426
DPA426
4(PoE+)
4(PoE+)
4(PoE+)
3.3
5.0
13.2 12.12 0.05
13.2
8.0
3.33
0.05
0.05
25
12.0 12.0
25
•
Isolation : Pri., Bias to Sec. ; 1500 Vrms • Isolation : Pri. to Bias ; 500 Vrms •
EPC3248-X
EPC3248-X-LF
Notes :
Hot Dipped Sn or SnCu
1. Lead Finish
SnPb
2. Peak Solder Rating
225°C
1
260°C
1
3. Moisture Sensitive Levels (MSL)
(Unlimited, £30°C/60%RH) (Unlimited, £30°C/60%RH)
Schematic 1
Schematic 2
Schematic 3
1
12
11
1
2
3
4
5
1
10
8
V In
(Pins 1-3)
V In
V In
2
3
5
6
(Pins 1-3)
(Pins 1-3)
10
9
7
7
6
2
3
V Out
V Out
V Out
9
8
7
Fb/Bias
Fb/Bias
Fb/Bias
4
6
5
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. 5 8-15-11 FT
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com
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