PWR40XX 5/2001 REV E

Page 4

OUTPUT POWER

The PWR40XX series was designed to meet power require-

ments up to 4W. Due to the nature of unregulated power

supplies, a higher-than-rated output voltage will result when

less-than-rated power is used (see Typical Performance

Curves). This series has been designed to run from no load

to 4W without derating up to +70°C.

UNBALANCEDLOADS

Unbalanced loads may be used on dual output models with

each side sourcing up to 200mA as long as the total power

out is not more than 4W. With an unbalanced load, the output

voltages will track within 5% of each other.

OUTPUT NOISE

The output noise can be reduced to less than 50mVp-p by

adding a low ESR 10µf tantalum capacitor across each

output.

TYPICAL PERFORMANCE CURVES

T

APPLICATION NOTES

SHORT CIRCUIT PROTECTION

To maintain low cost, the PWR40XX Series provides limited

short-circuit protection. To protect against continuous short

circuits, a fuse is required. It is recommended that the fuse

be placed in series with the input of the converter. The

Input Voltage

5V

229.015

12V

229.500

15V

229.375

24V

229.250

TABLE I. Recommended Fuses (or Equivalent).

Any data, prices, descriptions or specifications presented herein are subject to revision by C&D Technologies, Inc. without notice. While such information is believed to be accurate as indicated herein, C&D

Technologies, Inc. makes no warranty and hereby disclaims all warranties, express or implied, with regard to the accuracy or completeness of such information. Further, because the product(s) featured herein

may be used under conditions beyond its control, C&D Technologies, Inc. hereby disclaims all warranties, either express or implied, concerning the fitness or suitability of such product(s) for any particular use or

in any specific application or arising from any course of dealing or usage of trade. The user is solely responsible for determining the suitability of the product(s) featured herein for user’s intended purpose and in

user’s specific application. C&D Technologies, Inc. does not warrant or recommend that any of its products be used in any life support or aviation or aerospace applications.

Power Electronics Division, United States

3400 E Britannia Drive, Tucson, Arizona 85706

Phone: 800.547.2537

Fax: 520.770.9369

Power Electronics Division, Europe

C&D Technologies (Power Electronics) Ltd.

132 Shannon Industrial Estate, Shannon, Co. Clare, Ireland

Tel: +353.61.474.133

Fax:+353.61.474.141

C&D Technologies, (NCL)

Tanners Drive

Blakelands North

Milton Keynes MK14 5BU UK

Tel: +44 (0)1908 615232

Fax: +44 (0)1908 617545