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SELECTION GUIDE
78253 Series
MAX253 Compatible Converter Transformers
Order Code
78253/35C
78253/35MC
78253/55C
78253/55MC
Input Voltage
V
3.3
5.0
Output
Voltage
V
5.0
5.0
Max. Output
Current
mA
100
200
Isolation
Voltage
V DC
1500
1500
Turns
Ratio
1:2.27
1:1.31
Package
Style
DIL
SM
DIL
SM
FEATURES
n RoHS compliant
78253/35VC
78253/35MVC
78253/55VC
78253/55MVC
3.3
5.0
5.0
5.0
100
200
4000
4000
1:2.14
1:1.33
DIL
SM
DIL
SM
n Maxim MAX253 compatible
n 3.3V and 5V versions
n Isolation to 4kV DC
n Frequency range to 500kHZ
ORDER CODE DETAILS
Order Code
78253/XXC
78253/XXMC
78253/XXMC-R
Package Type
6 Pin DIL
6 Pin SM
6 Pin SM
Packaging Type
Tube
Tube
Tape & Reel
Quantity
50
50
500
n Toroidal construction
78253/35(M)C CHARACTERISTICS
n Industry-standard pinout
n UL 94 V-0 package materials
n Fully encapsulated
n Low profile
n Surface mount option
Parameter
Primary Inductance, L P
Secondary Inductance, L S
Leakage Inductance, L L
Interwinding Capacitance, C WW
Primary D.C. Resistance, R DC
Volt-time Product, Et
Conditions
100kHz, 250mV
100kHz, 250mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
Min.
0.30
1.60
30
Typ.
0.38
2.00
0.30
30
0.40
35
Max.
0.46
2.40
1.00
50
1.00
Units
mH
mH
μH
pF
?
Vμs
n Industrial temperature range
78253/55(M)C CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Units
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.
Primary Inductance, L P 100kHz, 250mV
Secondary Inductance, L S 100kHz, 250mV
Leakage Inductance, L L 100kHz, 250mV
Interwinding Capacitance, C WW 100kHz, 250mV
Primary D.C. Resistance, R DC >0.1VDC
Volt-time Product, Et Pins 1/2 or 2/3
78253/35(M)VC CHARACTERISTICS
Parameter Conditions
Primary Inductance, L P 100kHz, 20mV
0.60
1.10
40
Min.
110
0.83
1.40
0.35
30
0.70
50
Typ.
142
1.10
1.70
1.00
50
1.50
Max.
185
mH
mH
μH
pF
?
Vμs
Units
μH
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
Secondary Inductance, L S
Leakage Inductance, L L
Interwinding Capacitance, C WW
Primary D.C. Resistance, R DC
Volt-time Product, Et
100kHz, 20mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
550
18
710
3.00
4.20
0.30
22
850
5.00
8.00
0.50
μH
μH
pF
?
Vμs
manufacture and fully support these parts.
For recommended alternatives please refer to the
78253J Series datasheet.
78253/55(M)VC CHARACTERISTICS
Parameter Conditions
Primary Inductance, L P 100kHz, 20mV
Min.
190
Typ.
240
Max.
310
Units
μH
Secondary Inductance, L S
Leakage Inductance, L L
Interwinding Capacitance, C WW
Primary D.C. Resistance, R DC
Volt-time Product, Et
100kHz, 20mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
350
25
444
5.20
4.20
0.40
28
540
8.00
8.00
0.60
μH
μH
pF
?
Vμs
For full details go to
All specifications typical at T A =25°C
For full details go to
www.cd4power.com/rohs
www.murata-ps.com/rohs
www.murata-ps.com/support
KMP_78253C_D04 Page 1 of 5
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相关代理商/技术参数
78253/55MV-R
制造商:Murata Power Solutions 功能描述:Pulse Transformer 1:1.33 4000VDC 0.6Ohm Prim. DCR 8pF 28Vus Surface Mount
78253/55V
功能描述:电源变压器 MAX253 CNVR XFRMR
RoHS:否 制造商:Triad Magnetics 功率额定值:12 VA 初级电压额定值:115 V / 230 V 次级电压额定值:12 V / 24 V 安装风格:SMD/SMT 一次绕组:Dual Primary Winding 二次绕组:Dual Secondary Winding 长度:2.5 in 宽度:2 in 高度:1.062 in
78253/55VC
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RoHS:否 制造商:Triad Magnetics 功率额定值:12 VA 初级电压额定值:115 V / 230 V 次级电压额定值:12 V / 24 V 安装风格:SMD/SMT 一次绕组:Dual Primary Winding 二次绕组:Dual Secondary Winding 长度:2.5 in 宽度:2 in 高度:1.062 in
78253/55VC
制造商:Murata Power Solutions 功能描述:Toroidal Inductor
7825335C
制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:MAX253 Compatible Converter Transformers 3.3V and 5V versions
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制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:MAX253 Compatible Converter Transformers 3.3V and 5V versions
7825335MVC
制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:MAX253 Compatible Converter Transformers 3.3V and 5V versions
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制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:MAX253 Compatible Converter Transformers 3.3V and 5V versions