NDY SERIES
Isolated 3W Wide Input DC/DC Converters
FILTER CIRCUITS
EXTERNAL CAPACITANCE
Although these converters will work without
external capacitors, they are necessary in
order to guarantee the full parametric
performance over the full line and load
range. All parts have been tested and
characterised using the following values and
test circuit.
C
IN
Value
C
OUT
L
OUT
10µF, 200V
Philips Part Number
151621809 or any
good low esr capacitor
100µF, 25V
Philips Part Number
13556101 or any good
low esr capacitor
C&D Technologies Part
No 24100
FILTER CIRCUIT 1
V
IN
+V
OUT
C
IN
NDY
C
OUT
OUTPUT LOAD
The minimum rated load across the whole
input voltage range is 25% of the full load
output. It is important to take care that the
load does not fall below this as the output
ripple will greatly increase. While this
condition will not harm the device the
resultant increase in output ripple could cause
customers’ application to malfunction.
GND
OV
FILTER CIRCUIT 2
Recommended circuit for reduced ripple 3.3V O/P
V
IN
L
OUT
+V
OUT
C
IN
NDY
C
OUT
GND
OV
ENVIRONMENTAL
Parameter
Conditions
MIN
TYP
MAX
Units
Operation
Storage
Cooling
-40
-50
Free air convection
85
130
°C
°C
NDY05 POWER DERATING CURVE
5
Output Power (W)
4
3
2
1
0
4.5 5
6
7
Input Voltage (V)
8
9
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) Limited 2003
NDC NDY.3
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.
Instructions for use are available from www.cdpoweronline.com
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 Inc.
3400 E Britannia Drive, Tucson,
Arizona 85706, USA
Tel: +1 (800) 547-2537
Fax: +1 (520) 741-4598
email: sales@cdtechno.com
CANDD [ C&D TECHNOLOGIES ]
