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User’s Guide
BM2P134E-EVK-001
© 2021 ROHM Co., Ltd.
No.
63UG097E Rev.001
Feb.2021
Design Reference of Transformer
Manufacturer:
Wurth.
Bobbin:
EE20/10/6 (Vertical)
Core:
EE20/10/6
1
2
3
4
5
10
9
8
7
6
TERM. NO.
s FOR REF. ONLY
PART MUST INSERT FULLY TO
SURFACE A IN RECOMMENDED GRID
.028 SQ.(10)
[.70]
.996 MAX.
[25.30]
.138/.157 *
[3.50/4.00]
-A-
.894 MAX
[22.70]
LOT CODE & DATE CODE
DOT LOCATES TERM. #1
.575 MAX.
[14.60]
.400
[10.16]
Ø 0.063(10)
[1.60]
.150(8)
[3.80]
RECOMMENDED
P>C PATTERN, COMPONENT SIDE
Figure 4. Bobbin diagram
Figure 5. Winding structure diagram
Table 4. Wurth Transformer Winding Specification
Coil
Terminal
Turns
Wire
Winding Method
NP1
3-2
32
1 X1UEW 0.25 mm
1 Layer Space
NS1
10-8
10
1 X1TIW 0.55 mm
1 Layer Space
ND
4-5
13
1 X1UEW 0.18 mm
1 Layer Space
NS2
9-7
10
1 X TIW 0.55 mm
1 Layer Space
NP2
2-1
31
1 X1UEW 0.25 mm
1 Layer Space
Inductance (L
P
):
397 μH ± 10 %
Leakage Inductance:
20 μH Max
Withstand Voltage:
Pri - Sec AC3000 V
Pri - Core AC1800 V
Sec - Core AC1800 V
Insulation resistance:
100 MΩ over (DC500 V)
TAPE
TAPE
TAPE
TAPE
BOBBIN
AUXILLARY (ND)
PRIMARY (NP1)
SECONDARY(NS1)
SECONDARY(NS2)
PRIMARY (NP2)
TAPE
1
2
3
5
4
7
9
8
10
NP2
NP1
ND
NS2
NS1
EE20/10/6
