GENERAL SPECIFICATIONS

Hold-up time

110VAC, 40 Watts

14ms

230VAC, 40 Watts

110ms

Efficiency

70% typical

Isolation voltage

Input/output

3000VAC

Input/chassis

1500VAC

Switching frequency

NFS

Variable

NFN

Fixed, 45kHz ±5kHz

Approvals and

VDE0805, EN60950

standards

IEC950, IEC1010, UL1950

(See Note 13)

CSA C22.2 No. 950

Weight

280g (9.88oz)

MTBF (See Note 9)

MIL-HDBK-217E

170,000 hours

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

Operating

0°C to +70°C

(See Notes 8, 10)

Non-operating

–40°C to +85°C

50°C ambient temp.,

40W

Convection cooled

Forced air cooling

50W @ 20CFM

50°C to 70°C ambient

Derate linearly

to 50% load

Peak (60 seconds)

60W

Relative humidity

Non-condensing

5% to 80% RH

Altitude

Operating

10,000 feet max.

Non-operating

40,000 feet max.

Vibration (See Note 11)

5Hz to 500Hz,

2.4G rms peak

NFS40 and NFN40 SERIES

Single and triple output

[ 2 YEAR WARRANTY ]

• 5.0 x 3.0 x 1.2 inch package (1U applications)

• Industry standard package

• Overvoltage and short circuit protection

• 40W with free air convection

• Fixed frequency operation (NFN Series)

• NFS40: EN55022, EN55011 conducted emissions level A

• NFN40: EN55022, EN55011 conducted emissions level B

• UL, VDE and CSA safety approvals

The NFS40 and NFN40 are industry standard 40 Watt power supplies with the

capability to supply 50W in a forced air ambient and to automatically operate

from any voltage between 85VAC and 264VAC. Use of MOSFET based

switching circuits allows for enhanced features such as output regulation down

to zero load (NFN40). Universal input voltage eliminates the need to change

jumpers or switch settings to cater for different or widely varying line voltages.

In addition to the input voltage range, VDE, UL, CSA, EN60950 and IEC950

approvals make the NFS40 and NFN40 ideal for use in equipment installed

throughout the world. The fixed frequency operation of the NFN40 further

reduces emissions below VDE class B and significantly reduces leakage current.

These low profile switchers with high power density are intended for use in

small, digital systems.

PAGE 24

OUTPUT SPECIFICATIONS

Output voltage

+5V output on triples

±5.0%

adjustability

Vout on singles

±5.0%

Line regulation

Main output

±0.2%

LL to HL, FL

Auxiliary outputs

±1.0%

Total regulation

Main output

±2.0%

FL to NL

Auxiliary outputs

±5.0%

Transient response

+5V (1.5A to 3A)

±120mV max. dev.

500µs recovery

Temperature coefficient All outputs

±0.02%/°C

Overvoltage protection

+5V output

125% ±15% Vout

Output power limit

Primary power limited

90W input

power limit

Short circuit protection

Single outputs

Continuous

Multiple outputs

Short term

INPUT SPECIFICATIONS

Input voltage range

Universal input

85 to 264VAC

120 to 370VDC

Input frequency range

47 to 440Hz

Max. input surge

132VAC, cold start

12A max.

current

264VAC, cold start

24A max.

Safety ground

NFS: 110VAC, 60Hz

0.13mA max.

leakage current

230VAC, 50Hz

0.32mA max.

NFN: 132VAC, 60Hz

155µA max.

240VAC, 50Hz

261µA max.

EMC CHARACTERISTICS

Conducted emissions

EN55022 (NFS), FCC part 15

Level A

Conducted emissions

EN55022 (NFN), FCC part 15

Level B

Radiated emissions

EN55022 (NFS and NFN)

Level A

ESD air

EN61000-4-2, level 3

Perf. criteria 1

ESD contact

EN61000-4-2, level 4

Perf. criteria 1

Surge

EN61000-4-5, level 3

Perf. criteria 1

Fast transients

EN61000-4-4, level 3

Perf. criteria 1

Radiated immunity

EN61000-4-3, level 3

Perf. criteria 2

Conducted immunity

EN61000-4-6, level 3

Perf. criteria 2