Inductors
SMT gate drive transformers
Series/Type: EP5
Ordering code: B82804A
Date: October 2010
Version: 1
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Identification/Classification 1
(header 1 + top left bar):
Inductors
Identification/Classification 2
(header 2 + bottom left header bar):
SMT gate drive transformers
Ordering code: (top right header bar) B82804A
Series/Type: (bottom right header bar) EP5
Preliminary data (optional):
(if necessary)
Department: EPCOS Ho PD
Date: October 2010
Version: 1
Inductors B82804A
SMT gate drive transformers EP5
EPCOS Ho PD October 2010
Please read Cautions and warnings and Page 2 of 6
Important notes at the end of this document.
Construction
EP5 ferrite core
6 gull wing terminals
Features
Height: 5.4 max
Footprint: 8.1 x 6.7 mm
Low leakage inductance
Low inter-winding capacitance
High SRF value
High isolation between primary and secondary
side
RoHS compatible
Applications
Gate drive transformers
General purpose (non-automotive): isolated
AC/DC, DC/DC converters
Marking
Manufacturer, middle block of ordering code,
date code, pin1 marker
Delivery mode and packing unit
16-mm blister tape, 330 mm Ø reel
Packing unit: 850 packages/reel
Schematic
Figure A
Figure B
Dimensional drawings
Inductors B82804A
SMT gate drive transformers EP5
EPCOS Ho PD October 2010
Please read Cautions and warnings and Page 3 of 6
Important notes at the end of this document.
Technical data and measuring conditions
Main inductance L 100 kHz, 100 mV
Stray inductance Primary Lstray 100 kHz, 100 mV, secondary shorted
Resistance RDC Measured at 25 °C
Capacitance Ci Pri-Sec 100 kHz, 100 mV
Resonance frequency fres Primary winding
Test voltage Vtest DC values
Operating temperature range –40 °C … +125 °C
Characteristics and ordering codes
L Figure Turns
ratio Lstray R
DC-pri R
DC-sec Ci f
res V
test E*dt Ordering code
μH pri-sec μH Ω Ω pF MHz V DC μVs
300 A 2.5:1:1 0.9 1.8 0.3 27 2.6 1500 23.8 B82804A0304A225
317 A 2:1:1 0.6 1.6 0.45 22 2 1500 24.5 B82804A0324A220
264 A 1:1:1 0.3 1.5 1.5 95 2.9 1500 22.4 B82804A0264A210
350 B 1:1 1 1 0.65 75 1.2 1500 25.8 B82804A0354A110
690 B 1.5:1 2.5 1.65 0.86 27 0.7 1500 40.8 B82804A0694A115
473 B 2.5:1 1.5 1.5 0.3 25 1.7 1500 30.6 B82804A0474A125
Recommended solder reflow profile
Pb-free solder material (based on JEDEC J-STD 020D)
T1 (°C) T2 (°C) T3 (°C) T4 (°C) t1 (s) t2 (s) t3 (s)
150 200 217 245 60 … 200 60 … 150 30
Max. time from 25 °C to T4: 480 seconds
Max. number of reflow cycles: 3
Inductors B82804A
SMT gate drive transformers EP5
EPCOS Ho PD October 2010
Please read Cautions and warnings and Page 4 of 6
Important notes at the end of this document.
Blister tape detail
Reel size and detail
Inductors B82804A
SMT gate drive transformers EP5
EPCOS Ho PD October 2010
Please read Cautions and warnings and Page 5 of 6
Important notes at the end of this document.
Cautions and warnings
Please note the recommendations in our Inductors data book (latest edition or in the Internet) and
in the data sheets.
Particular attention should be paid to the derating curves given there. The soldering conditions
should also be observed. Temperatures quoted in relation to wave soldering refer to the pin, not
the housing.
If the components are to be washed varnished it is necessary to check whether the washing
varnish agent that is used has a negative effect on the wire insulation, any plastics that are used,
or on glued joints. In particular, it is possible for washing varnish agent residues to have a
negative effect in the long-term on wire insulation.
The following points must be observed if the components are potted in customer applications:
– Many potting materials shrink as they harden. They therefore exert a pressure on the plastic
housing or core. This pressure can have a deleterious effect on electrical properties, and in
extreme cases can damage the core or plastic housing mechanically.
– It is necessary to check whether the potting material used attacks or destroys the wire
insulation, plastics or glue.
– The effect of the potting material can change the high-frequency behaviour of the components.
Ferrites are sensitive to direct impact. This can cause the core material to flake, or lead to
breakage of the core.
Even for customer-specific products, conclusive validation of the component in the circuit can only
be carried out by the customer.
Important notes
Page 6 of 6
The following applies to all products named in this publication:
1. Some parts of this publication contain statements about the suitability of our products for
certain areas of application. These statements are based on our knowledge of typical
requirements that are often placed on our products in the areas of application concerned. We
nevertheless expressly point out that such statements cannot be regarded as binding
statements about the suitability of our products for a particular customer application. As a
rule, EPCOS is either unfamiliar with individual customer applications or less familiar with them
than the customers themselves. For these reasons, it is always ultimately incumbent on the
customer to check and decide whether an EPCOS product with the properties described in the
product specification is suitable for use in a particular customer application.
2. We also point out that in individual cases, a malfunction of electronic components or failure
before the end of their usual service life cannot be completely ruled out in the current state
of the art, even if they are operated as specified. In customer applications requiring a very high
level of operational safety and especially in customer applications in which the malfunction or
failure of an electronic component could endanger human life or health (e.g. in accident
prevention or life-saving systems), it must therefore be ensured by means of suitable design of the
customer application or other action taken by the customer (e.g. installation of protective circuitry
or redundancy) that no injury or damage is sustained by third parties in the event of malfunction or
failure of an electronic component.
3. The warnings, cautions and product-specific notes must be observed.
4. In order to satisfy certain technical requirements, some of the products described in this
publication may contain substances subject to restrictions in certain jurisdictions (e.g.
because they are classed as hazardous). Useful information on this will be found in our Material
Data Sheets on the Internet (www.epcos.com/material). Should you have any more detailed
questions, please contact our sales offices.
5. We constantly strive to improve our products. Consequently, the products described in this
publication may change from time to time. The same is true of the corresponding product
specifications. Please check therefore to what extent product descriptions and specifications
contained in this publication are still applicable before or when you place an order.
We also reserve the right to discontinue production and delivery of products. Consequently,
we cannot guarantee that all products named in this publication will always be available.
The aforementioned does not apply in the case of individual agreements deviating from the
foregoing for customer-specific products.
6. Unless otherwise agreed in individual contracts, all orders are subject to the current version of
the “General Terms of Delivery for Products and Services in the Electrical Industry”
published by the German Electrical and Electronics Industry Association (ZVEI).
7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CSMP, CSSP, CTVS, DeltaCap, DigiSiMic,
DSSP, FormFit, MiniBlue, MiniCell, MKD, MKK, MLSC, MotorCap, PCC, PhaseCap, PhaseCube,
PhaseMod, PhiCap, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SiMic, SIMID, SineFormer,
SIOV, SIP5D, SIP5K, ThermoFuse, WindCap are trademarks registered or pending in Europe
and in other countries. Further information will be found on the Internet at
www.epcos.com/trademarks.
