High Frequency Wire Wound Transformers
Power Range: up to 95W
Height: 11.4mm Max
Footprint: 29.2mm x 21.8mm Max
Toplogy: Forward and Flyback
Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C
PA0273NL
Pri. Inductance
(1, 2-3, 4)
307µH ±25%
Lk. Inductance
(1, 2-3, 4) with (5, 6, 9, 10) shorted
0.35µH MAX
(1, 2-3, 4)
65mΩ MAX
(7, 8, 9-10, 11, 12)
27mΩ MAX
(5-6)
240mΩ MAX
Hi-Pot
Pri-Sec
1500Vrms
K1 Factor
20.2
Pri. Inductance
(1, 2-3, 4)
110µH ±10%
Lk. Inductance
(1, 2-3, 4) with (12, 11, 10, 9, 8, 7) shorted
2µH MAX
(4-5)
85mΩ MAX
(12, 11, 10-9, 8, 7)
12mΩ MAX
(1-3)
300mΩ MAX
Hi-Pot
Pri-Sec
1500Vrms
K1 Factor
1364.8
Pri. Inductance
(1, 2-5, 4)
89.2µH ±18%
Lk. Inductance
(1, 2-3, 4) with (12, 11, 10, 9, 8, 7) shorted
1.5µH MAX
(1, 2-3,4)
50mΩ MAX
(12-11)
3.8mΩ MAX
(10-9)=(8-7)
35mΩ MAX
(5-6)
110mΩ MAX
Hi-Pot
Pri-Sec
1500Vdc
K1 Factor
21.5
DCR
PA0751NL
DCR
PA0769NL
1
DCR
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FLYBACK TRANSFORMER
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High Frequency Wire Wound Transformers
Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C
PA1066NL
Pri. Inductance
(3-4)
137µH ±32%
Lk. Inductance
(3-4) with (11, 10, 9, 8) shorted
1.0µH MAX
(3-4)
35mΩ MAX
(1-2)
199mΩ MAX
(5-6)
100mΩ MAX
(11-10)=(9-8)
17mΩ MAX
Hi-Pot
Pri-Sec
500Vrms
K1 Factor
29.3
Pri. Inductance
(2, 3-4, 5)
10µH ±10%
Lk. Inductance
(2, 3-4, 5) with (11, 8) shorted
0.3µH MAX
(2, 3-4, 5)
15.75mΩ MAX
(11-8)
560mΩ MAX
Hi-Pot
Pri-Sec
1500Vrms
K1 Factor
322.6
Pri. Inductance
(1, 2-3, 4)
38.3µH ±7%
Lk. Inductance
(1, 2-3, 4) with (12, 11, 10, 9, 8, 7) shorted
1.0µH MAX
(1-3)
72mΩ MAX
(2-4)
85mΩ MAX
(12, 11, 10-9, 8, 7)
2.5mΩ MAX
(5-6)
230mΩ MAX
Hi-Pot
Pri-Sec
1800Vrms
K1 Factor
772.2
Pri. Inductance
(1, 2-3, 4)
11.5µH ±10%
Lk. Inductance
(1, 2-3, 4) with (12, 11, 10, 9, 8, 7) shorted
0.5µH MAX
(1, 2-3, 4)
28mΩ MAX
(8-7)
12mΩ MAX
(12-11)
5mΩ MAX
(10-9)
62mΩ MAX
(5-6)
190mΩ MAX
Pri-Sec
1500Vrms
DCR
PA1366NL
DCR
PA1477NL
DCR
PA1558NL
DCR
Hi-Pot
FORWARD TRANSFORMER
FLYBACK TRANSFORMER
FLYBACK TRANSFORMER
FLYBACK TRANSFORMER
463.7
1
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High Frequency Wire Wound Transformers
Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C
PA1692NL
Pri. Inductance
(3, 4-5, 6)
73µH ±30%
Lk. Inductance
(3, 4-5, 6) with (12, 11, 10, 9, 8, 7) shorted
1.0µH MAX
(3, 4-5, 6)
10.2mΩ MAX
(12, 11, 10-9, 8, 7)
5mΩ MAX
(1-2)
115mΩ MAX
Hi-Pot
Pri-Sec
1500Vdc
K1 Factor
40.3
Pri. Inductance
(1, 2-3, 4)
28.5µH ±5%
Lk. Inductance
(1, 2-3, 4) with (12, 11, 10, 9, 8, 7) shorted
1µH MAX
(1, 2-3, 4)
39.0mΩ MAX
(12, 11, 10-9, 8, 7)
3.5mΩ MAX
(5-6)
230mΩ MAX
Hi-Pot
Pri-Sec
1800Vrms
K1 Factor
574.6
Pri. Inductance
(1, 2-3, 4)
20.5µH ±5%
Lk. Inductance
(1, 2-3, 4) with (12, 11, 10, 9, 8, 7) shorted
1µH MAX
(1, 2-3, 4)
39.0mΩ MAX
(12, 11, 10-9, 8, 7)
8.5mΩ MAX
(5-6)
230mΩ MAX
Hi-Pot
Pri-Sec
1500Vrms
K1 Factor
413.3
Pri. Inductance
(1, 2-3, 4)
4.5µH ±5%
Lk. Inductance
(1, 2-3, 4) with (12, 11, 10, 9, 8, 7) shorted
0.25µH MAX
(1, 2-3, 4)
9.5mΩ MAX
(12, 11, 10-9, 8, 7)
3mΩ MAX
(5-6)
130mΩ MAX
Hi-Pot
Pri-Sec
1800Vrms
K1 Factor
241.9
Pri. Inductance
(1, 2-3, 4)
4.5µH ±5%
Lk. Inductance
(1, 2-3, 4) with (12, 11, 10, 9, 8, 7) shorted
0.2µH MAX
(1, 2, 3, 4)
9.5mΩ MAX
(12, 11, 10-9, 8, 7)
5mΩ MAX
(5-6)
130mΩ MAX
Hi-Pot
Pri-Sec
1800Vrms
K1 Factor
241.9
DCR
PA1735NL
DCR
DCR
PA1736NL
DCR
PA1835NL
DCR
PA1836NL
1
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FLYBACK TRANSFORMER
FLYBACK TRANSFORMER
FLYBACK TRANSFORMER
FLYBACK TRANSFORMER
FLYBACK TRANSFORMER
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High Frequency Wire Wound Transformers
Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C
PA1837NL
Pri. Inductance
(1, 2-3, 4)
4.5µH ±5%
Lk. Inductance
(1, 2-3, 4) with (12, 11, 10, 9, 8, 7) shorted
0.2µH MAX
(1, 2, 3, 4)
9.5mΩ MAX
(12, 11, 10-9, 8, 7)
23mΩ MAX
(5-6)
130mΩ MAX
Hi-Pot
Pri-Sec
1800Vdc
K1 Factor
Pri. Inductance
241.9
(1-3)
7.2µH ±5%
Lk. Inductance
(1-3) with (11, 10-9, 7) shorted
0.3µH MAX
(1-3)
52mΩ MAX
(11, 10-9, 7)
12mΩ MAX
(5-6)
240mΩ MAX
Hi-Pot
Pri-Sec
1500Vrms
K1 Factor
290.3
Pri. Inductance
(1, 2-5, 6)
292.0µH ±32%
Lk. Inductance
(1, 2-5, 6) with (12, 11, 10, 9, 8, 7) shorted
1.3µH MAX
(1, 2-5, 6)
78.0mΩ MAX
(7, 8-9, 10)
12mΩ MAX
(11-12)
43mΩ MAX
Hi-Pot
Pri-Sec
1500Vrms
K1 Factor
20.2
Pri. Inductance
(1-4)
57.6µH ±12%
Lk. Inductance
(1-4) with (all windings) shorted
0.5µH MAX
(1-4)
65mΩ MAX
(3-2)
155mΩ MAX
(6-5)
145mΩ MAX
(7, 8-9, 10)
4mΩ MAX
(11-12)
55mΩ MAX
Hi-Pot
Pri-Sec
1500Vdc
K1 Factor
26.9
Pri. Inductance
(1,2-3.4)
100µH ±12%
Lk. Inductance
(1, 2-3, 4) with (5, 6, 9,1 0) shorted
0.45µH MAX
(1, 2-3, 4)
72mΩ MAX
(7, 8, 9-10, 11, 12)
15mΩ MAX
(5-6)
680mΩ MAX
Pri-Sec
1500Vrms
DCR
DCR
PA2047NL
DCR
PA2053NL
PA2291NL
DCR
PA2398NL
DCR
Hi-Pot
16.1
1
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FLYBACK TRANSFORMER
FLYBACK TRANSFORMER
FLYBACK TRANSFORMER
FLYBACK TRANSFORMER
FORWARD TRANSFORMER
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High Frequency Wire Wound Transformers
Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C
Pri. Inductance
(1-6) with (3-4) shorted
491µH ±35%
Lk. Inductance
(1-6) with (all windings) shorted
1µH MAX
(1-3)
36.1mΩ MAX
(4-6)
45.6mΩ MAX
(8-7)
86.4mΩ MAX
(11-9)
86.4mΩ MAX
(12-10)
47.8mΩ MAX
Hi-Pot
Pri-Sec
1500Vrms
K1 Factor
16.1
Pri. Inductance
(5, 4-3, 2)
112.0µH MAX
Lk. Inductance
(5, 4-3, 2) with (all windings) shorted
1µH MAX
(5-3)
55mΩ MAX
(4-2)
67.7mΩ MAX
(10, 11-8, 9)
5.5mΩ MAX
(12-7)
123mΩ MAX
(6-1)
923mΩ MAX
Hi-Pot
Pri-Sec
1500Vdc
K1 Factor
24.8
DCR
PB2041NL
PB2089NL
DCR
1
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Notes:
1. The temperature of the component (ambient plus temperature rise) must be within the
stated operating temperature range.
2. The above transformers and inductors have been tested and approved by Pulse’s power
IC partners and are sited in the appropriate datasheet or evaluation board documentation
at these companies. To determine which IC and IC partners are matched with the above
Pulse part numbers please consult the IC Cross Reference on the Pulse website.
3. For flyback topology applications, it is necessary to ensure that the transformer will not
saturate in the application. The peak flux density (Bpk) should remain below 2700Gauss.
To calculate the peak density, use the following formula:
Bpk (Gauss) = K1_Factor * Ipk (A)
4. In high volt-sec applications, it is important to calculate the core loss of the transformer.
Approximate transformer core loss can be calculated as:
CoreLoss (W) = 1.32E-13 * (Freq_kHz)1.63 * (ΔB_Gauss) 2.63
where ΔB can be calculated as:
For Flyback Topology: ΔB = K1_Factor * (A)
For Forward Topology: ΔB = K1_Factor * Volt-µsec
5. Optional Tape & Reel packaging can be ordered by adding a “T” suffix to the part
number (i.e. PA0273NL becomes PA0273NLT). Pulse complies with industry standard tape
and reel specification EIA481. The tape and reel for this product has a width (W=44mm),
pitch (Po=32mm) an depth (Ko=11.78mm).
6. The “NL” suffix indicates an RoHS-compliant part number. Non-NL suffixed parts are
not necessarily RoHS compliant, but are electrically and mechanically equivalent to NL
versions. If a part number does not have the “NL” suffix, but an RoHS compliant version
is required, please contact Pulse for availability.
Mechanical
PAXXXXNL / PBXXXXNL
For More Information
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Tel: 86 21 62787060
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Tel: 65 6287 8998
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Tel: 886 3 4356768
Fax: 886 3 4356820
Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may
be trademarks or registered trademarks of their respective owners. © Copyright, 2019. Pulse Electronics, Inc. All rights reserved.
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