78253J Series - Murata Power Solutions

78253J Series
MAX253 Compatible Converter SM Transformers
SELECTION GUIDE
Order Code
78253/35JC
78253/55JC
78253/35JVC
78253/55JVC
V
Output
Voltage
V
Max. Output
Current
mA
Isolation
Voltage
VDC
Turns
Ratio
3.3
5.0
3.3
5.0
5.0
5.0
5.0
5.0
100
200
100
200
1500
1500
4000
4000
1:2.27
1:1.31
1:2.14
1:1.33
Input Voltage
ORDER CODE DETAILS
FEATURES
n J-STD-020D reflow
n RoHS compliant
n Maxim MAX253 compatible
n 3.3V and 5V versions
n Isolation to 4kVDC
n Frequency range to 500kHz
n Toroidal construction
n Industry-standard pinout
n UL 94 V-0 package materials
n Low profile
n Industrial temperature range
DESCRIPTION
The 78253 series of converter transformers are
specifically designed for use with the MAX253
chip set to provide isolated power supplies. The
5V input version can supply 1W and the 3.3V
input version can supply 500mW. A centre tapped
secondary winding allows for full bridge, half
bridge or voltage doubling.
For through hole versions see 78253 series
datasheet.
Order Code
78253/XXJ(V)C
78253/XXJ(V)C-R
Package Type
6 Pin SM
6 Pin SM
Packaging Type
Tube
Tape & Reel
Quantity
50
500
78253/35JC CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Units
Primary Inductance, LP
Secondary Inductance, LS
Leakage Inductance, LL
Interwinding Capacitance, CWW
Primary D.C. Resistance, RDC
Volt-time Product, Et
100kHz, 250mV
100kHz, 250mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
0.27
1.60
0.36
2.00
0.32
24
0.5
49
0.50
2.40
1.00
50
1.00
mH
mH
μH
pF
30
Ω
Vμs
78253/55JC CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Units
Primary Inductance, LP
Secondary Inductance, LS
Leakage Inductance, LL
Interwinding Capacitance, CWW
Primary D.C. Resistance, RDC
Volt-time Product, Et
100kHz, 250mV
100kHz, 250mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
0.57
1.10
1.10
1.70
1.00
50
1.50
mH
mH
μH
pF
40
0.83
1.40
0.51
30
0.70
70
Ω
Vμs
78253/35JVC CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Units
Primary Inductance, LP
Secondary Inductance, LS
Leakage Inductance, LL
Interwinding Capacitance, CWW
Primary D.C. Resistance, RDC
Volt-time Product, Et
100kHz, 20mV
100kHz, 20mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
110
550
203
850
5.00
8.00
0.50
μH
μH
μH
pF
18
142
710
3.46
2
0.30
30
Ω
Vμs
78253/55JVC CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Units
Primary Inductance, LP
Secondary Inductance, LS
Leakage Inductance, LL
Interwinding Capacitance, CWW
Primary D.C. Resistance, RDC
Volt-time Product, Et
100kHz, 20mV
100kHz, 20mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
170
350
240
444
6.28
3.4
0.40
37
335
540
8.00
8.00
0.60
μH
μH
μH
pF
25
Ω
Vμs
All specifications typical at TA=25°C
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2014-06-10 KMP_78253JC_A03 Page 1 of 5
78253J Series
MAX253 Compatible Converter SM Transformers
ABSOLUTE MAXIMUM RATINGS
Operating free air temperature range
-40°C to 85°C
Storage temperature range
-50°C to 125°C
Peak current IPK
400mA
Isolation voltage 78253/XXJC (flash tested for 1 second)
1500VDC
Isolation voltage 78253/XXJVC (flash tested for 1 second)
4000VDC
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
0.5
(12.70)
0.375
(9.52) MAX
Top View
1
0.354
(9.0) MAX
78253/55JC
XYYWW
Primary
Secondary
6
2
5
3
4
0.25
(6.35)
0.012 (0.30)
0.008 (0.20)
0.035
(0.90)
0.1
(2.54)
0.025 (0.63)
0.021 (0.53)
Unless otherwise stated all dimensions in inches (mm) ±0.01 (0.25).
All pins on a 0.1 (2.54) pitch and within ±0.01 (0.25) of true position.
Package weight 1.0g Typ.
RECOMMENDED FOOTPRINT DETAILS
0.10 (2.54)
0.06 (1.60)
0.10 (2.54)
0.10 (2.54)
Ø0.05 (1.20) +0.006 (0.15)
-0.000 (0.00)
0.04
(1.00)
0.45
(11.50)
Unless otherwise stated all dimensions in inches (mm) ±0.01 (0.25).
All pins on a 0.1 (2.54) pitch and within ±0.01 (0.25) of true position.
www.murata-ps.com/support
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2014-06-10 KMP_78253JC_A03 Page 2 of 5
78253J Series
MAX253 Compatible Converter SM Transformers
TYPICAL CHARACTERISTICS (VOLTAGE CURVES)
VOLTAGE CURVES
78253/35JC
10
8
Output Voltage (V)
Output Voltage (V)
8
6
4
2
0
80
40
60
100
Output Current (mA)
20
0
6
4
2
0
120
78253/35JVC
10
0
100
300
200
Output Current (mA)
400
78253/55JVC
10
8
8
Output Voltage (V)
Output Voltage (V)
78253/55JC
10
6
4
2
0
20
0
80
40
60
Output Current (mA)
6
4
2
0
100
100
0
200
300
Output Current (mA)
400
EFFICIENCY CURVES
78253/35JC
100
80
Efficiency (%)
Efficiency (%)
80
60
40
0
20
80
40
60
Output Current (mA)
40
0
100 120
78253/35JVC
100
0
100
200
300
Output Current (mA)
400
78253/55JVC
100
80
80
Efficiency (%)
Efficiency (%)
60
20
20
0
78253/55JC
100
60
40
60
40
20
20
0
0
20
40
60
Output Current (mA)
80
100
0
0
200
100
300
Output Current (mA)
400
All curves are derived from testing with the Maxim MAX235 IC using the circuit shown in application note MPAN-03 ( download at http://www.murata-ps.com/data/apnotes/mpan-03.pdf).
www.murata-ps.com/support
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2014-06-10 KMP_78253JC_A03 Page 3 of 5
78253J Series
MAX253 Compatible Converter SM Transformers
TYPICAL CHARACTERISTICS (VOLTAGE CURVES) continued
VOLTAGE DEVIATION
78253/35JC
105
100
95
90
-50
-25
75
100
78253/35JVC
105
100
95
90
-50
-25
50
0
25
Temperature (°C)
75
100
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand
Voltage’ & ‘Isolation Test Voltage’ are all terms
that relate to the same thing, a test voltage,
applied for a specified time, across a component designed to provide electrical isolation, to
verify the integrity of that isolation.
All products in this series are 100% production
tested at their stated isolation voltage.
A question commonly asked is, “What is the
continuous voltage that can be applied across
the part in normal operation?”
For a part holding no specific agency approvals both input and output should normally be
maintained within SELV limits i.e. less than
42.4V peak, or 60VDC. The isolation test
voltage represents a measure of immunity to
transient voltages and the part should never
be used as an element of a safety isolation
system. The part could be expected to function
correctly with several hundred volts offset
applied continuously across the isolation barrier; but then the circuitry on both sides of the
barrier must be regarded as operating at an
unsafe voltage and further isolation/insulation
systems must form a barrier between these
circuits and any user-accessible circuitry according to safety standard requirements.
105
100
95
90
-50
-25
50
0
25
Temperature (°C)
75
100
75
100
78253/55JVC
110
Voltage Deviation from Nominal
25°C Output (%)
110
Voltage Deviation from Nominal
25°C Output (%)
50
0
25
Temperature (°C)
78253/55JC
110
Voltage Deviation from Nominal
25°C Output (%)
Voltage Deviation from Nominal
25°C Output (%)
110
105
100
95
90
-50
-25
25
50
0
Temperature (°C)
SOLDERING INFORMATION1
REPEATED HIGH-VOLTAGE
ISOLATION TESTING
It is well known that repeated high-voltage
isolation testing of a barrier component can
actually degrade isolation capability, to a
lesser or greater degree depending on materials, construction and environment. This
series has toroidal isolation transformers,
with no additional insulation between primary and secondary windings of enameled
wire. While parts can be expected to withstand several times the stated test voltage,
the isolation capability does depend on the
wire insulation. Any material, including this
enamel (typically polyurethane) is susceptible to eventual chemical degradation when
subject to very high applied voltages thus
implying that the number of tests should be
strictly limited. We therefore strongly advise
against repeated high voltage isolation testing, but if it is absolutely required, that the
voltage be reduced by 20% from specified
test voltage.
This consideration equally applies to agency
recognized parts rated for better than
functional isolation where the wire enamel
insulation is always supplemented by a
further insulation system of physical spacing
or barriers.
www.murata-ps.com/support
Pin finish
Max. peak reflow temperature
Moisture sensitivity level2
Max. time above liquidous (217°C)
Matte tin
245°C
1
100s
TUBE OUTLINE DIMENSIONS
0.43
(10.95)
0.16 (4.00)
0.023±0.005
(0.60±0.15)
0.51
(12.95)
0.22 (5.50)
0.15
(3.80)
0.62 (15.70)
Tube length: 18.3±0.08 (465±2). Tube quantity: 50.
Tube material: Antistatic coated clear pvc.
Unless otherwise stated all dimensions in inches(mm) ±0.01 (0.25).
All specifications typical at TA=25°C
1 For further information, please visit www.murata-ps.com/rohs
2 Representative samples of the product were subjected to the conditioning described in
IPC/JEDEC J-STD-020D and passed electrical testing, package coplanarity and visual
inspection which revealed no external cracks or changes in package body flatness.
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2014-06-10 KMP_78253JC_A03 Page 4 of 5
78253J Series
MAX253 Compatible Converter SM Transformers
TAPE & REEL SPECIFICATIONS
REEL OUTLINE DIMENSIONS
2.36 (60) Min.
Ø15.039 (382) Max.
0.94-1.08 (23.9-27.4)*
Ø 0.53 (13.50)
0.50 (12.80)
Leader section
15.7 (400) Min.
3.9 (100)
Min.
0.059 (1.50)
Min.
1.20
(30.4) Max.
Goods
enclosure
section
0.96 (24.4)
1.04 (26.4)
Trailer section
6.3 (160) Min.
Reel quantity: 500
Unless otherwise stated all
dimensions in inches (mm) ±0.01(0.25).
Ø 0.80 (20.20) Min.
* Includes flange distortion at outer edge.
 Measured at hub.
TAPE OUTLINE DIMENSIONS
0.157 (4.00)
78253
35JC
0.453 (11.50)
+0.004
+0.10
0.059 -0.000 (1.50 -0.00 )
0.079 (2.00)
XYYWW
+0.012
+0.30
0.945 -0.004 (24.00 -0.10 )
0.069 (1.75)
Cover tape
0.283 (7.20)
0.369 (9.37)
0.472 (12.00)
0.024 (0.60) Max.
Direction of unreeling
Unless otherwise stated all
dimensions in inches (mm) ±0.01(0.25).
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
www.murata-ps.com/support
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice. © 2010 Murata Power Solutions, Inc.
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2014-06-10 KMP_78253JC_A03 Page 5 of 5