SMT Current Sense Transformers
EP 10 Core
Series/Type:
Ordering code:
Date:
Version:
B78419
2015-11-25
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Identification/Classification 1
SMT Current Sense Transformers
(header 1 + top left bar):
Identification/Classification 2
EP 10 Core
(header 2 + bottom left header bar):
Ordering code: (top right header bar)
Series/Type: (bottom right header bar)
B78419
Preliminary data (optional):
Department:
MAG TF T PD
Date:
2015-11-25
Version:
EPCOS AG 2015. Reproduction, publication and dissemination of this publication, enclosures hereto and the information
contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
SMT Current Sense Transformers
EP 10 Core
Construction
•
Ferrite core
•
Primary winding: frame molded in
•
Secondary winding: copper wire
•
Creepage distance Np/(Ns, core) 6 mm
•
Clearance distance Np/Ns (CuL) 3.5 mm
•
Clearance distance Np/core 5.3 mm
•
Plastic bobbin (UL94-V0, CTI
≥
175)
B78419
Features
•
Very low DC resistance
•
Different turn ratios
•
Small SMD package
•
RoHS compatible
•
Qualified to AEC-Q200
•
Design complies with IEC 61558-2-16 (Basic insulation, working voltage rms 500 V)
•
Insulation distances in compliance with IEC 60664
(Basic insulation, working voltage rms 500 V)
Applications
•
Switch-mode power supplies
•
Feedback control
•
Overload sensing
•
Load drop/shut down detection
Terminals
•
L-Pins
Marking
•
Product brand, middle block of ordering code, date code, pin 1 marker, production place
identification code
Delivery mode and packing unit
•
Blister tape
•
Packing unit 200 pcs
MAG TF T PD
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 8
2015-11-25
SMT Current Sense Transformers
EP 10 Core
Dimensional drawing
B78419
MAG TF T PD
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 8
2015-11-25
SMT Current Sense Transformers
EP 10 Core
Application circuit and pinning
B78419
Technical data and measuring conditions
Typical Frequency range
High Voltage
Inductance L (5-4)
DC resistance R
max
(1-2)
DC resistance R
max
(5-4)
Sensed current: I
prim,RMS
Couple capacitance C
p
(1-5)
Resistance to reflow soldering
heat
Operating temperature range
Pollution degree
Insulation thermal class
Weight
50 … 250 kHz
2400 V AC, 50 Hz, 1 s (winding to winding)
Type test 60 s
Measured at 20 kHz, 10 mV, 25°C
Measured at 25°C
Measured at 25°C
The max. primary current of 30 A causes approx.
+40 °C temperature rise
Measured at 10 kHz, 1 V, 25°C
In accordance with JEDEC J-STD-020D
+245 °C for 20 seconds
−40
°C … +150 °C (component)
P2 (to IEC 61558-1, 60664)
155°C (F) (to IEC 60085)
Approx. 5 g
MAG TF T PD
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 8
2015-11-25
SMT Current Sense Transformers
EP 10 Core
B78419
=
With:
,
,
×
×
×
Maximum magnetic flux density in the ferrite core of the current sense transformer
Maximum output voltage of the measurement signal
Maximum duty cycle
Number of turns of the secondary winding of the current sense transformer
Effective magnetic area of the ferrite core
Operating frequency of the switching operator IC
Typical value for : 10.7 x 10-6 m
2
: < 220 mT
Typical
=
With:
,
,
,
×
Resistance of burden resistor
Maximum output voltage of the measurement signal
,
Number of turns on the secondary side of the CST
Maximum primary current (peak current)
Characteristics and ordering codes
L
min
(5-4)
mH
1.7
3.0
7.0
11.0
25.0
Turns
Ratio
Np : Ns
1:50
1:70
1:100
1:125
1:180
Voltage-
time product
+120°C
V · µs
117
164
235
294
423
C
p
R
max
(1-2)
mΩ
0.5
0.5
0.5
0.5
0.5
R
max
(4-5)
Ω
1.5
2.1
3.1
4.0
7.4
Recommended
R
T
Ω
50
70
100
125
180
Ordering Code
pF
4
4
4
4
4
B78419A2288A003
B78419A2289A003
B78419A2251A003
B78419A2290A003
B78419A2271A003
MAG TF T PD
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 8
2015-11-25
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