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3
VP
VERSA-PAC® Inductors and Transformers (Surface Mount)
Technical Data 4301
Effective August 2017
(1) The first three or four digits in the part number signify the size of the
package. The next four digits specify the AL, or nanoHenries per turn
squared. -R indicates RoHS compliant.
(2) LBASE = Nominal Inductance of a single winding.
(3) IBASE is the lessor of ISAT(BASE) and IRMS(BASE).
(4) Peak current that will result in 30% saturation of the core. This
current value assumes that equal current flows in all six windings.
For applications in which all windings are not simultaneously driven
(i.e. flyback, SEPIC, Cuk, etc.), the saturation current per winding
may be calculated as follows:
ISAT=6 x ISAT(BASE)
Number of Windings Driven
(5) RMS Current that results in a surface temperature of approximately
40 °C above ambient. The 40 °C rise occurs when the specified
current flows through each of the six windings.
(6) Maximum DC Resistance of each winding.
(7) For multiple windings in series, the volt-µsecondTOTAL (µVs) capability
varies as the number of windings in series (S):
Volt-µsecTOTAL = S xVolt-µsec(BASE)
For multiple windings in parallel, the volt-µsecondTOTAL (µVs) capability
is as shown in the table above.
(8) Maximum Energy capability of each winding. This is based on 30%
saturation of the core:
EnergySERIES = S2
x1x0.7LBASE xI2
SAT(BASE)
2
EnergyPARALLEL = P2
x1x0.7LBASE xI2
SAT(BASE)
For multiple windings, the energy capability varies as the square of
the number of windings. For example, six windings (either parallel
or series) can store 36 times more energy than one winding.
(9) Thermal Resistance is the approximate surface temperature rise
per Watt of heat loss under still-air conditions. Heat loss is a
combination of core loss and wire loss. The number assumes the
underlying PCB copper area equals 150% of the component area.
(10) These devices are designed for feed-forward applications, where
load current dominates magnitizing current.
2
VERSA-PAC temperature rise depends on total power losses and
size. Any other PCM configurations other than those suggested
could run hotter than acceptable.
Certain topologies or applications must be analyzed for needed
requirements and matched with the best VERSA-PAC size and
configuration. Proper consideration must be used with all
parameters, especially those associated with current rating, energy
storage, or maximum volt-seconds.
VERSA-PAC should not be used in off-line or safety related
applications. The breakdown voltage from one winding to any other
winding is 500 VAC maximum.
Product specifications- notes
Dimensions- mm
VP1 and VPH1
TOP VIEW
WHITE DOT
PIN #1
D
(12 PLCS)
LOGO (OPTIONAL)
B
C
A
12
7
6
1
FRONT VIEW
I
(12 PLCS) HG
(2 PLCS)
WWLLYY R
E
F
VPH
_
-
____
RECOMMENDED PCB LAYOUT
J
N
M
COMPONENT
SIDE
112
67
L
(12PLCS)
K
(12PLCS) 0
(10PLCS)
P
(10PLCS)
4
1
5
2
68
12
7
11
10
9
31:1:1:1:1:1
AAAB EFGH I JKLMNOP
mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm
max ref max ref ref max ref ref ref ref ref max
VP1 and VPH1 12.9 9.2 13.0 0.7 5.9 6.2 1.5 0.1 0.25 11.5 1.5 2.25 9.7 14.2 2.0 0.5
NOTES:
1) Tolerances A - I are ± 0.25 mm unless specified
otherwise.
2) Tolerances J - P are +/- 0.1 mm unless specified
otherwise.
3) Marking:
a) Dot for pin #1 identification
b) VP(H)x-xxx (product code, size, 4 digit part
number per family table.)
c) Versa Pac Logo (optional)
d) wwllyy = (date code) R = (revision level)
4) All soldering surfaces must be coplanar within
0.102 mm.
5) Packaged in tape and reel 600 parts per reel