KMP-78253 Datasheet, PDF (1/5 Pages) Murata Power Solutions Inc. – MAX253 Compatible Converter Transformers

www.murata-ps.com
78253 Series
MAX253 Compatible Converter Transformers
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.
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SELECTION GUIDE
Order Code
78253/35C
78253/35MC
78253/55C
78253/55MC
78253/35VC
78253/35MVC
78253/55VC
78253/55MVC
Input Voltage
V
3.3
5.0
3.3
5.0
Output
Voltage
V
5.0
5.0
5.0
5.0
ORDER CODE DETAILS
Order Code
78253/XX(V)C
78253/XXM(V)C
78253/XXM(V)C-R
Package Type
6 Pin DIL
6 Pin SM
6 Pin SM
78253/35(M)C CHARACTERISTICS
Parameter
Conditions
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
100kHz, 250mV
100kHz, 250mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
78253/55(M)C CHARACTERISTICS
Parameter
Conditions
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
100kHz, 250mV
100kHz, 250mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
78253/35(M)VC CHARACTERISTICS
Parameter
Conditions
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
100kHz, 20mV
100kHz, 20mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
78253/55(M)VC CHARACTERISTICS
Parameter
Conditions
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
100kHz, 20mV
100kHz, 20mV
100kHz, 250mV
100kHz, 250mV
>0.1VDC
Pins 1/2 or 2/3
All specifications typical at T_A=25°C
Max. Output
Current
mA
100
Isolation
Voltage
VDC
1500
200
1500
100
4000
200
4000
Packaging Type
Tube
Tube
Tape & Reel
Min.
Typ.
0.30
0.38
1.60
2.00
0.30
30
0.40
30
35
Min.
Typ.
0.60
0.83
1.10
1.40
0.35
30
0.70
40
50
Min.
Typ.
110
142
550
710
3.00
4.20
0.30
18
22
Min.
Typ.
190
240
350
444
5.20
4.20
0.40
25
28
Turns
Ratio
1:2.27
1:1.31
1:2.14
1:1.33
Package
Style
DIL
SM
DIL
SM
DIL
SM
DIL
SM
Quantity
50
50
500
Max.
Units
0.46
mH
2.40
mH
1.00
μH
50
pF
1.00
Ω
Vμs
Max.
Units
1.10
mH
1.70
mH
1.00
μH
50
pF
1.50
Ω
Vμs
Max.
Units
185
μH
850
μH
5.00
μH
8.00
pF
0.50
Ω
Vμs
Max.
Units
310
μH
540
μH
8.00
μH
8.00
pF
0.60
Ω
Vμs
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KMP_78253C_D05  Page 1 of 5