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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

squared.

-R indicates RoHS compliant.

(2) L

BASE

= Nominal Inductance of a single winding.

(3) I

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:

I

SAT

=

6 x I

SAT(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-µsecond

TOTAL

(µVs) capability

varies as the number of windings in series (S):

Volt-µsec

is as shown in the table above.

(8) Maximum Energy capability of each winding. This is based on 30%

saturation of the core:

Energy

2

x

1

x

0.7L

2

SAT(BASE)

2

Energy

2

x

1

x

0.7L

2

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)

H

G

(2 PLCS)

WWLLYY R

E

F

RECOMMENDED PCB LAYOUT

J

N

M

COMPONENT

SIDE

1

12

6

7

L

(12PLCS)

K

(12PLCS)

0

(10PLCS)

P

(10PLCS)

4

1

5

2

6

8

12

7

11

10

9

3

1:1:1:1:1:1

A

A

AB

E

F

G

H

I

J

K

LM

N

O

P

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