78253 SERIES
MAX253 Compatible Converter Transformers
MECHANICAL DIMENSIONS
6 Pin DIP
6 Pin SM
12.70
9.52 max
9.52 max
Top View
Primary
Top View
Primary
Secondary
Secondary
1
2
3
6
5
4
1
2
3
6
5
4
8.89 max
8.89 max
78253
35
78250M
XYYWW
6.35
6.35
XYYWW
0.30
0.20
3.44 0.50
0.90
2.54
0.30
0.20
0.63
0.53
0.63
0.53
10.16
2.54
All dimensions in mm XX.XX 0.25mm. All pins on a 2.54mm pitch and within 0.25mm of true position.
TYPICAL CHARACTERISTICS (VOLTAGE CURVES)
VOLTAGE CURVES
10
8
10
8
10
10
78253/35(M)
FS=Low
78253/55(M)
78253/35(M)V
FS=High
FS=Low
78253/55(M)V
8
8
6
4
2
0
FS=Low/High
6
6
6
FS=Low
4
4
4
FS=High
FS=High
200
2
2
2
0
0
0
0
20 40 60 80 100 120
Output Current (mA)
0
100
200
300
400
0
20
40
60
80 100
0
100
300
400
Output Current (mA)
Output Current (mA)
Output Current (mA)
EFFICIENCY CURVES
100
80
60
40
20
0
100
80
60
40
20
0
100
100
80
60
40
20
0
78253/35(M)
78253/55(M)
FS=Low/High
78253/35(M)V
78253/55(M)V
80
FS=High
FS=High
FS=Low
60
40
20
0
FS=Low
FS=High
FS=Low
0
20 40 60 80 100 120
Output Current (mA)
0
100
200
300
400
0
20
40
60
80 100
0
100
200
300
400
Output Current (mA)
Output Current (mA)
Output Current (mA)
VOLTAGE DEVIATION
110
105
100
95
110
105
100
95
110
110
105
100
95
78253/35(M)
78253/55(M)
FS=High
78253/35(M)V
78253/55(M)V
FS=High
FS=High
105
100
95
FS=Low
FS=Low
FS=Low
FS=Low
FS=High
90
-50 -25
90
-50 -25
90
-50 -25
90
-50 -25
0
25 50 75 100
0
25 50 75 100
0
25 50 75 100
0
25 50 75 100
Temperature (°C)
Temperature (°C)
Temperature (°C)
Temperature (°C)
C&D Technologies (NCL) Limited reserve the right to alter or improve the
specification, internal design or manufacturing process at any time, without
notice. Please check with your supplier or visit our web site to ensure that
you have the current and complete specification for your product before use.
C&D Technologies (NCL) Ltd
Tanners Drive, Blakelands North
Milton Keynes MK14 5BU, England
Tel: +44 (0)1908 615232
Fax:+44 (0)1908 617545
email: info@cdtechno-ncl.com
C&D Technologies (NCL), Inc.
8917 Glenwood Avenue, Raleigh
NC 27612, USA
Tel: +1 (919) 571-9405
Fax: +1 (919) 571-9262
© C&D Technologies (NCL) Limited 2000
NMP 78253.2
email: info@us.cdtechno-ncl.com
No part of this publication may be copied, transmitted or stored in a
retrieval system or reproduced in any way including, but not limited to,
photography, photocopy, magnetic or other recording means, without prior
written permission from C&D Technologies (NCL) Limited.
www: http://www.dc-dc.com
Instructions for use are available from www.dc-dc.com
CANDD [ C&D TECHNOLOGIES ]
