P025_10W-50W_Planar Transformer_en0 pages
DESIGN GUIDE | P l a n a r Tr a n s f o r m e r s & I n d u c t o r s
SIZE P025
Power Range 10W-50W
Highlights
•t Patented (U.S. PAT. 7,129,809) design with superior
thermal management
•t High efficiency (low losses), ultra compact, low-profile
•t Great co-planarity of terminals due to patented header
offering repeatable height
•t Excellent solderability (Pb-free or Pb/Sn Solder)
•t Standard sizes / customer configurations
•t Quick custom turn-around often without start-up or tooling costs
•t Inductors available for design in all packages
“Application Engineering Experts”
:: DESIGN EXAMPLES ::
CUSTOM IS S TA N D A R D
Design Input
Pri. Np Sec. I Out. Sec. Ns1
Example Voltage Turns Ns1 Max (2) Turns
Part #
VDC
(Pins) VDC ADC
(Pins)
Sec. Sec. Height
Ns2 Ns2 mm (in) (1)
VDC Turns Typ.
1125-1
36 - 75 12 (1-5)
3
30
2 (6,7-9,10)
-
-
6.4 (0.250”)
1125-2
18 - 36 6 (1-3)
3
30
2 (6,7-9,10)
-
-
6.4 (0.250”)
1125-3
36 - 75 12 (1-5)
5
20
3 (6-10)
-
-
6.4 (0.250”)
1125-4
18 - 36 6 (1-3)
5
20
3 (6-10)
-
-
6.4 (0.250”)
1125-5
36 - 75 12 (1-5) 12
2.5
8 (7-9)
-
-
6.4 (0.250”)
1125-6
18 - 36 6 (1-3)
2.5
8 (7-9)
-
-
6.4 (0.250”)
12
Customize beyond these examples!
Rated power 10W-50W / Frequency range 300-500kHZ
Surface mount (SMD) or through hole (TH)
Topology - Forward (w/active rest), Flyback
Current rating max. SMD=20A, TH = +30%
Isolation voltage pri-sec/pri-core 500-2,000VDC
Soft switching, single or multiple outputs
Different switching frequencies, input/output voltages
Primary turns - other number (no fractions)
Secondary Ns1, Ns2 / Ns3 turns 1- 8 (no fractions)
Thermal solutions heat sinks, etc.
Notes: Full electrical, thermal, and efficiency calculations available upon request 1) Length (L) may
vary depending on terminals. Height (H) may vary depending on input / output requirements. 2)
Estimated value for normal conditions. Current rating can be up to 30% higher for through hole
applications.
SURFACE MOUNT DESIGN
8.1 mm max
15.8 mm
PCB Pad Layout
All Pad dimensions tolerance +/- 0.1
19.0
6.0
10 pl.
2.3
19.1 mm
3.0
C /L
3.0
U.S. PAT. 7,129,809
6.0
2.7
Notes
1. Dimensions are in mm
4. Header: LCP, natural color
2. Drawing not to scale
5. Pins: Copper
3. Tolerance +/- 2% unless noted 6. Pin Finish: Tin (Sn) over Nickel (Ni)
These models are for reference only and may NOT exactly match the design examples provided.
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