LLC Resonance Power Transformers
Pin terminal type
SRX series
Type:
SRX45EM(Drop-in)
SRX38EM(Drop-in)
SRX43EM(Drop-in/Through hole)
SRX30ER(Through hole)
SRX35ER(Through hole)
SRX38ER(Through hole)
SRX48EM(Through hole)
SRX40ER(Through hole)
September 2010
Issue date:
• All specifications are subject to change without notice.
• Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific
bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.
LLC Resonance Power Transformers
SRX Series
Contents
Page
Development Concept ................................................................1
Replacement Parts List ..............................................................2
SRX45EM (Height from the board: 8mm)...................................4
SRX38EM (Height from the board: 10mm).................................5
SRX43EM (Height from the board: 10mm, 15mm).....................6
SRX30ER (Height from the board: 25mm, 27mm) ...................10
SRX35ER (Height from the board: 25mm) ...............................11
SRX38ER (Height from the board: 27mm) ...............................12
SRX48EM (Height from the board: 25mm)...............................13
SRX40ER (Height from the board: 31.5mm) ............................14
Design Reference for LLC Resonance Power Transformers ....15
Specification Request Form .....................................................16
•
All specifications are subject to change without notice.
(1/18)
LLC Resonance Power Transformer
SRX Series
Development Concept
Conformity to RoHS Directive
Compliant with worldwide safety standards, this is a small and thin transformer with the advantages of effective use of low-loss ferrite
material.
■MATERIAL
Optimized materials and core shapes have been developed. The necessary power can be transmitted with a small number of windings.
While optimizing materials, TDK has further improved its proprietary core shape to develop a new-type ECO core.
The transformer has been downsized considerably, and its temperature increase has also been curbed.
■MANUFACTURING
METHOD
Since the ECO Series supports automatic winding, the product is of a high quality and can be manufactured stably.
It is designed to support automatic winding, which enables a remarkable reduction in the loss generated to achieve a proficient in
manual winding until stable production.
In addition, the characteristic variations of the winding wire and creepage tape have largely been removed, stabilizing the transformer's
characteristics.
■OPTIMIZATION
DESIGN
Using design tools developed with TDK's comprehensive know-how, high-precision design has been achieved in a short period of time.
1) For optimization design and high-quality stable production, customers can use a specification request form.
If you provide the necessary information in the form, you will receive the optimization design in a short time.
2) TDK recommends design with a standard core gap (A
L
-value) for optimization and shorter trial and mass production lead time.
Design is simple as each shape retains its GAP, A
L
-value, and K parameters beforehand.
■ENVIRONMENT
The SRX series is RoHS directive-compliant product.
• Ferrite cores, bobbins, cases, etc. are not sold individually.
• Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific
bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.
• All specifications are subject to change without notice.
003-02 / 20100924 / e636_srx.fm
(2/18)
LLC Resonance Power Transformer
SRX Series
TDK now provides a characteristically thin resonance LLC reso-
nance power transformer. In order to develop this transformer,
TDK made effective use of low loss performance (which is a fea-
ture of the PC47 family), optimized the structure of the core and
the bobbin, and utilized its proprietary automatic winding industrial
method.
FEATURES
• A low height (8 to 31.5mm in height) is achieved.
• Large power is achieved in a small shape.
• The automatic winding industrial method is adopted.
• It is a product conforming to RoHS directive.
APPLICATIONS
AV equipment, digital consumer electronic
PRODUCT IDENTIFICATION
SRX 30ER - P
(1)
(2)
(3)
(1) Series name
(2) Core size
(3) Input voltage code
(4) Output voltage code
(5) Internal control code
ELECTRICAL CHARACTERISTICS
Part No.
SRX45EM
SRX38EM
SRX43EM
Through hole
SRX30ER
SRX35ER
SRX38ER
SRX48EM
SRX40ER
∗1
∗2
Conformity to RoHS Directive
THROUGH HOLE TYPE
DROP-IN TYPE
(4)
(5)
H
D
W
D
W
H
Mount method
∗1
Drop-in
Drop-in
Drop-in
Height H
(mm)
7.7
∗2
10
10
15
27
25
27
25
27
25
31.5
Frequency
(kHz)min.
120
120
100
100
100
80
60
60
60
Maximum
output power
(W)max.
180
125
180
180
180
250
250
300
300
Number of
outputs
2
2
2
2
3
2
3
2
3
3
3
3
D
(mm)
57
50
53
53
55
58
57
52
45
55
58
58
54
W
(mm)
46.5
40
52
46
46
46
41.5
45.5
37.5
53
53
51
43
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Lead
space F
(mm)
69.6
65.5
60
65.2
37.5
37.5
40
35
35
35
40
35
35
Number of pins(pieces)
Primary
Secondary
side
side
5
7
6
6
5
5
6
6
8
6
6
6
6
8
7
7
8
6
8
6
9
9
8
8
When applying flow solder to a drop-in transformer, be careful to ensure that only the terminals come into contact with the solder.
Typical dimensions(maximum dimensions may vary depending on the specifications.)
• Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific
bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.
• All specifications are subject to change without notice.
003-02 / 20100924 / e636_srx.fm
(3/18)
Lineup of Resonance Switching Power Transformers
35
SRX40ER
30
SRX38ER
SRX30ER
25
Height from substrate(mm)
SRX35ER
SRX48EM
20
15
SRX43EM
When multiple transformers
are used.
10
SRX38EM
SRX43EM
SRX45EM
: Through hole
: Drop-in
Bold
: Dropped substrate
: Sample-supporting product
100
150
200
Power(W)
250
300
350
400
EXTERNAL SHAPES OF THROUGH HOLE AND DROP-IN TRANSFORMERS
THROUGH HOLE TYPE
Board(PCB)
Side view
DROP-IN TYPE
H
Side view
Board(PCB)
When the board height (H) is decreased
further, holes are made in the board
(PCB) in order for the transformer to be
mounted.
Cross-section view
• All specifications are subject to change without notice.
003-02 / 20100924 / e636_srx.fm
H
