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78253/55MVC-R

P1-P3P4-P5
KMP_78253C_D05 Page 1 of 5
78253 Series
MAX253 Compatible Converter Transformers
www.murata-ps.com
www.murata-ps.com/support
　
For full details go to
www.cd4power.com/rohs
For full details go to
www.murata-ps.com/rohs
FEATURES
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 Fully encapsulated
n Low profile
n Surface mount option
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 version can supply 1W and the 3.3V version
can supply 500mW. A centre tapped secondary
winding allows for full bridge, half bridge or
voltage doubling.
Surface-mount parts
The surface-mount (M suffix) products are not
recommended for new designs. For existing designs,
however, Murata Power Solutions will continue to
manufacture and fully support these parts.
For recommended alternatives please refer to the
78253J Series datasheet.
SELECTION GUIDE
Order Code
Input Voltage
Output
Voltage
Max. Output
Current
Isolation
Voltage
Turns
Ratio
Package
Style
V V mA VDC
78253/35C
3.3 5.0 100 1500 1:2.27
DIL
78253/35MC SM
78253/55C
5.0 5.0 200 1500 1:1.31
DIL
78253/55MC SM
78253/35VC
3.3 5.0 100 4000 1:2.14
DIL
78253/35MVC SM
78253/55VC
5.0 5.0 200 4000 1:1.33
DIL
78253/55MVC SM
ORDER CODE DETAILS
Order Code Package Type Packaging Type Quantity
78253/XX(V)C 6 Pin DIL Tube 50
78253/XXM(V)C 6 Pin SM Tube 50
78253/XXM(V)C-R 6 Pin SM Tape & Reel 500
78253/35(M)C CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Primary Inductance, L
P
100kHz, 250mV 0.30 0.38 0.46 mH
Secondary Inductance, L
S
100kHz, 250mV 1.60 2.00 2.40 mH
Leakage Inductance, L
L
100kHz, 250mV 0.30 1.00 μH
Interwinding Capacitance, C
WW
100kHz, 250mV 30 50 pF
Primary D.C. Resistance, R
DC
>0.1VDC 0.40 1.00
Ω
Volt-time Product, Et Pins 1/2 or 2/3 30 35 Vμs
78253/55(M)C CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Primary Inductance, L
P
100kHz, 250mV 0.60 0.83 1.10 mH
Secondary Inductance, L
S
100kHz, 250mV 1.10 1.40 1.70 mH
Leakage Inductance, L
L
100kHz, 250mV 0.35 1.00 μH
Interwinding Capacitance, C
WW
100kHz, 250mV 30 50 pF
Primary D.C. Resistance, R
DC
>0.1VDC 0.70 1.50
Ω
Volt-time Product, Et Pins 1/2 or 2/3 40 50 Vμs
78253/35(M)VC CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Primary Inductance, L
P
100kHz, 20mV 110 142 185 μH
Secondary Inductance, L
S
100kHz, 20mV 550 710 850 μH
Leakage Inductance, L
L
100kHz, 250mV 3.00 5.00 μH
Interwinding Capacitance, C
WW
100kHz, 250mV 4.20 8.00 pF
Primary D.C. Resistance, R
DC
>0.1VDC 0.30 0.50
Ω
Volt-time Product, Et Pins 1/2 or 2/3 18 22 Vμs
78253/55(M)VC CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Primary Inductance, L
P
100kHz, 20mV 190 240 310 μH
Secondary Inductance, L
S
100kHz, 20mV 350 444 540 μH
Leakage Inductance, L
L
100kHz, 250mV 5.20 8.00 μH
Interwinding Capacitance, C
WW
100kHz, 250mV 4.20 8.00 pF
Primary D.C. Resistance, R
DC
>0.1VDC 0.40 0.60
Ω
Volt-time Product, Et Pins 1/2 or 2/3 25 28 Vμs
All specifications typical at T
A
=25°C
KMP_78253C_D05 Page 2 of 5
78253 Series
MAX253 Compatible Converter Transformers
www.murata-ps.com/support
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
RECOMMENDED FOOTPRINT DETAILS
6 Pin DIL 6 Pin SM
ABSOLUTE MAXIMUM RATINGS
Operating free air temperature range
-40°C to 85°C
Storage temperature range
-50°C to 125°C
Lead Temperature 1.5mm from case for 10 seconds
300°C
Peak current I
PK
400mA
Isolation voltage 78253/XX(M)C (flash tested for 1 second)
1500VDC
Isolation voltage 78253/XX(M)VC (flash tested for 1 second)
4000VDC
0.135±0.02
(3.44±0.50)
0.25
(6.35)
0.354
(9.0) MAX
0.375
(9.52) MAX
0.012(0.30)
0.008(0.20)
0.40
(10.16)
0.1 (2.54)
0.025 (0.63)
0.021 (0.53)
0.354
(9.0) MAX
0.375
(9.52) MAX
0.5
(12.70)
0.025 (0.63)
0.021 (0.53)
0.1
(2.54)
0.035
(0.90)
0.012 0.30
(0.008 0.20)
0.25
(6.35)
78253/55MC
XYYWW
78253/35C
XYYWW
Primary
Secondary
Primary
Secondary
1
2
3
6
4
5
1
2
3
6
4
5
0.10 (2.54)
0.10 (2.54)
Ø0.05 (1.20)
+0.006 (0.15)
-0.000 (0.00)
0.45
(11.50)
0.10 (2.54)
0.04
(1.00)
0.06 (1.60)
6 Pin DIL
6 Pin SM
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.
0.10 (2.54)
0.10 (2.54)
Ø0.05 (1.20)
+0.006 (0.15)
-0.000 (0.00)
0.45
(11.50)
0.10 (2.54)
0.04
(1.00)
0.06 (1.60)
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.
Top ViewTop View
KMP_78253C_D05 Page 3 of 5
78253 Series
MAX253 Compatible Converter Transformers
www.murata-ps.com/support
TYPICAL CHARACTERISTICS (VOLTAGE CURVES)
VOLTAGE CURVES
Output Voltage (V)
Output Voltage (V)
Output Current (mA) Output Current (mA)
Output Voltage (V)
Output Voltage (V)
Output Current (mA) Output Current (mA)
EFFICIENCY CURVES
Efficiency (%)
Efficiency (%)
Output Current (mA) Output Current (mA)
Efficiency (%)
Efficiency (%)
Output Current (mA) Output Current (mA)
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).
10
8
6
4
2
0
0
20 40 60
80
100 120
78253/35(M)C
400
78253/55(M)C
10
8
6
4
2
0
0
100 200
300
78253/35(M)VC
10
8
6
4
2
0
0
20 40 60 100
80
78253/55(M)VC
10
8
6
4
2
0
0
100 200 300 400
78253/35(M)C
100
80
60
40
20
0
0
20 40 60
120
80
100
78253/55(M)C
100
80
60
40
20
0
0
200
400
300
100
78253/35(M)VC
0
20 40 60
100
80
100
80
60
40
20
0
78253/55(M)VC
100
80
60
40
20
0
0
200
400
300
100
P1-P3P4-P5

78253/55MVC-R

Mfr. #:
Buy 78253/55MVC-R
Manufacturer:
Description:
Power Transformers 5Vin 5Vout 200mA 4000Vdc 1:1.33 turn
Lifecycle:
New from this manufacturer.
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