PLA51
www.vishay.com
Vishay Sfernice
Medium Power Planar Transformer 1 kW to 3 kW
FEATURES
• For high power density DC/DC converter
application
• Very low profile and weight
• High efficiency: > 99 %
• Recommended frequency range (50 kHz; 400 kHz)
• Operating temperature range: -55 °C; 125 °C with heat
sink dissipation
• Easy-assembly system for cold plates
In addition to this standard design of PLA51 many
custom designs can be offered upon request
• Tapped output terminals
• Material temperature grade: 180 °C
LINKS TO ADDITIONAL RESOURCES
• Excellent repeatability
3D 3D
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
3D Models
QUICK REFERENCE DATA
Type
Transformer
Size (L x W x H)
70 mm x 53 mm x 22 mm
Terminals
Tapped outputs or wires
Power
1000 W to 3000 W
Frequency range
50 kHz to 400 kHz
Inductance range
96 μH to 160 μH
EXAMPLE OF TRANSFORMER APPLICATION: 2 kW DC/DC CONVERTER, PLA51LA32
POWER SUPPLY
TOPOLOGY
Full bridge with
current doubler
FREQUENCY
POWER
INPUT
VOLTAGE
OUTPUT
VOLTAGE
OUTPUT
CURRENT
DUTY CYCLE
MAX.
100 kHz
2 kW
50 VDC to 110 VDC
30 V
67 A
0.98
STANDARD ELECTRICAL CHARACTERISTICS
INDUCTANCE
(10 kHz; 0.1 V)
LEAKAGE
INDUCTANCE
(10 kHz; 0.1 V)
TURN
RATIO
POWER
LOSSES
EFFICIENCY
HIPOT:
PRIMARY / SECONDARY
+ CORE
1500 VAC
HIPOT:
SECONDARY / CORE
128 μH ± 25 %
< 150 nH (typical)
3:2
< 17 W
> 99 %
< 150 μA
< 150 μA
Revision: 10-Nov-2020
Document Number: 59059
1
For technical questions, contact: sferaztronics@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
PLA51
www.vishay.com
Vishay Sfernice
RECOMMENDATIONS FOR MOUNTING
Announced performances are achieved using a liquid cooling system. The internal temperature must be maintained below
160 °C. The user shall correctly size its own heatsink according to real working conditions of his device.
PACKAGING
Individual box.
ELECTRICAL SCHEMES
DIMENSIONS in millimeters (± 0.5)
22 max.
53 max.
11.6 ± 1.1
25.8
3
1
8.4 ± 0.7
4
3
PLA51LA32
70 max. 58
x 4 M4
threaded
nuts
AZ YY-WW
2
4
6.8 ± 0.6
1
2
35.2
13.2 ± 1.1
General tolerance: ± 0.5 mm
Notes
• Weight 170 g
• Take care of ferrite core while handling (no shock admitted)
• Terminal fixing: with M4 screw, max. tightening: 1.2 Nm
SAP PART NUMBERING
MODEL
SIZE
STYLE
FOOTPRINT
RATIO
SPECIAL
PLA
51
L = leadframe with nuts
W = wires
A = as shown
in above drawings
(other upon request)
21 = 2 : 1 (on request)
31 = 3 : 1 (on request)
32 = 3 : 2
SR = special ratio
XXXXX =
special code
(6 digits)
RELATED DOCUMENTS
APPLICATION NOTES
Designing With the PLA51 Planar Transformer for Enhanced
Power Density and Efficiency
Revision: 10-Nov-2020
www.vishay.com/doc?59063
Document Number: 59059
2
For technical questions, contact: sferaztronics@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Legal Disclaimer Notice
www.vishay.com
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay's knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
about the suitability of products for a particular application. It is the customer's responsibility to validate that a particular product
with the properties described in the product specification is suitable for use in a particular application. Parameters provided in
datasheets and / or specifications may vary in different applications and performance may vary over time. All operating
parameters, including typical parameters, must be validated for each customer application by the customer's technical experts.
Product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited
to the warranty expressed therein.
Hyperlinks included in this datasheet may direct users to third-party websites. These links are provided as a convenience and
for informational purposes only. Inclusion of these hyperlinks does not constitute an endorsement or an approval by Vishay of
any of the products, services or opinions of the corporation, organization or individual associated with the third-party website.
Vishay disclaims any and all liability and bears no responsibility for the accuracy, legality or content of the third-party website
or for that of subsequent links.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please
contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications.
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© 2022 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 01-Jan-2022
1
Document Number: 91000
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