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PDF SRW17EPC Data sheet ( Hoja de datos )
| Número de pieza | SRW17EPC | |
| Descripción | General Transformers | |
| Fabricantes | TDK | |
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001-01 / 20010913 / e6355_srw.fm
Transformers
For Power Supply
Pin Terminal
SRW Series
(General Transformers, Barrierless Transformer®)
GENERAL TRANSFORMERS, BARRIERLESS TRANSFORMER®
The SRW series transformer for switching power supplies utilizes
ferrite materials, which makes it possible to achieve an incredibly
high efficiency in the required frequency range.
FEATURES
• By using high efficiency ferrite cores suitable for power conversion
with very low power loss and large magnetic flux density it is
possible to design transformers that is quite compact in size and
high efficiency.
• A wide variety of shapes and sizes from low output to high
output power, gives great flexibility of design switching power
supply.
• Bobbins and other components are also available which are
capable for a variety of safety regulations such as UL, CSA and
VDE.
APPLICATIONS
Transformers and Inductors for switching power supplies used for
TVs, CRT Monitors, VCRs, DVDs, printers, air conditioners, AC
adaptors, etc.
PRECAUTIONARY ITEMS REGARDING THE PRODUCT
• The maximum output power is a guideline for Flyback converter
topology operating at 50kHz. There may be differences depending
upon the circuit topologies.
• Special ferrite materials produced for power transformers with
large magnetic flux density are used in the ferrite core, so that
temperature rise of transformer is within 45°C in standard design
condition.
• Transformer temperature may rise even during normal operation, it
is advisable that you provide a sufficient mounting distance from
parts such as electrolytic capacitors, which do not withstand heat
well.
• A beat sound noise may be generated even under normal
operation (no harmful effect on usage).
• Please consult with us concerning usage outside of ratings.
• The products has not acquired approval for safety regulations,
however, it has been constructed with materials and structures
that meet with all types of safety regulations. Please consult with
us about individual categories concerning the acquisition of
safety regulations.
• Please make inquiries before use regarding industrial properties
outside the ownership of our company regarding the contents
stated here.
• When designing transformers, please feel free to contact with us
concerning designs for ferrite materials and standard bobbins,
which are not listed.
• All specifications are subject to change without notice.
Free Datasheet http://www.datasheet4u.com/
1 page  
Transformers
For Power Supply
Pin Terminal
GENERAL TRANSFORMERS
SHAPES AND DIMENSIONS
1-16.SRW49EC
(5/15)
001-01 / 20010913 / e6355_srw.fm
SRW Series
(General Transformers)
1-17.SRW49LEC
1-18.SRW13EPC
52max.
PPPPPPPP
18-ø1
P=5±0.3
123456789
18 17 16 15 14 13 12 11 10
1-19.SRW17EPC
52max.
PPPPPPPP
18-ø1
P=5±0.3
123456789
18 17 16 15 14 13 12 11 10
1-20.SRW19EPC
15max.
PPPP
P=2.5±0.3
1 2 3 4 5 10- 0.49
10 9 8 7 6
1-21.SRW2220EM
19.5max.
21max.
24max.
10-ø0.6 1 2 3 4
P1 P1 P1
11- 0.49 1 2 3 4 5
P1 P1 P1 P1
P2 P2 P2 P2 P2
10 9 8 7 6 5
P1=3.75±0.3
P2=2.5 ±0.3
P2 P2 P2 P2 P2
11 10 9 8 7 6
P1=3.75±0.3
P2=2.5±0.3
• All specifications are subject to change without notice.
9-ø0.8 1 2 3 4
P1 P1 P1
P2 P2 P2 P2
98 76 5
P1=5±0.3
P2=3.75±0.3
Dimensions in mm
Free Datasheet http://www.datasheet4u.com/
5 Page 
Transformers
For Power Supply
Pin Terminal
SRW Series
(Specifications)
(11/15)
001-01 / 20010913 / e6355_srw.fm
SPECIFICATIONS
Temperature Operating
ranges
Storage
Humidity
ranges
Operating
Storage
–10 to +60°C
–25 to +85°C
30 to 95(%)RH[without dewing]
30 to 95(%)RH[without dewing]
GENERAL CHARACTERISTICS
Standard test
conditions
Ambient temperature
range
+5 to +35°C
Relative humidity range 45 to 85(%)RH[without dewing]
Item
Inductance
DC resistance
Turn ratio and polarity
Withstand voltage
Insulation resistance
Terminal strength
Temperature rise
Solderability
Standard
Test methods
Individual specification
Use LCR meter (f=1kHz), YHP4261 or equivalent.
(tolerance±10%)
Less than 0.05Ω: +30% max.
Use Milliohm-meter VP2941 or equivalent.
0.05 to 0.1Ω: +20% max.
0.1 to 0.5Ω: +15% max.
0.5Ω or more: +10% max.
Specified value ±1 to 20%, individual
Use turn ratio tester TRD-0.9 (f=1 to 100kHz) or equivalent.
specification
No abnormality between the primary and Apply separately specified AC voltage (50Hz) for 1min.
secondary windings, between the primary
winding and the core, and so on.
10MΩ min.
Measure by applying DC.500V.
Use insulation resistance meter SM-5E or equivalent.
9.8N min.
Apply 9.8N load in the direction of terminal axis for 30±5s. Any terminal must not be
pulled out or chatter.
Standard design value
Measure the core surface by thermocouple method, and the windings by resistance
45°C max. (thermocouple method)
method or thermocouple method.
55°C max. (resistance method)
Solder covers more than 90%.
Dip in solder with the temperature of 230±5°C for 2±0.5s.
RELIABILITY TESTSRELIABILITY TESTS
Item Standards
Test methods
Vibration resistance
Conform to JIS-C 5025. Sweep 1.5mm amplitude and 10-to-50-to-10Hz in 1min in X,
Y, and Z directions for 2h respectively.
Heat resistance
Cold resistance
Humidity resistance
Standard of inductance, insulation resis- Measure in normal temperature after leaving in 100±2°C for 96h.
tance, withstand voltage must be satis- Measure in normal temperature after leaving in –40±2°C for 96h.
fied. Measure in normal temperature after leaving in 60±2°C and 90 to 95(%)RH for 96h.
Temperature cycle
One cycle is –25°C for 30min, normal temperature for 30min, and 85°C for 30min;
measure after 10 cycles of the test have been performed.
• The above listed items are representative examples.
The details can be found by referring to the appended individual delivery specifications.
• All specifications are subject to change without notice.
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
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