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NFC40 SERIES

Single and triple output

•

40 Watts in a 2.2 x 2.2 x 0.5 inch case

Base plate cooled patented topology

Remote ON/OFF control

Short circuit protection

Industry standard pin-out

UL, CSA and VDE safety approvals

Extended operating temperature range option

Fixed frequency operation

US Patent No. 4621311

[ 2 YEAR WARRANTY ]

Providing 40W of power in a 2.2 x 2.2 x 0.5 inch package, the highly specified NFC40

Series of DC/DC converters were designed with today’s demanding applications in

mind. Inherent design specifications of the NFC40 include tight line and load

regulation and high power density. Standard features provided by all members of the

NFC40 Series are remote on/off, synchronization function, short circuit protection,

overvoltage protection and an output voltage trim function. To maximize the board

area available to system designers, the NFC40 footprint has been minimised without

compromising on features or profile. A comprehensive package of heatsink and

operating temperature options are included to further increase the flexibility offered.

Artesyn Technologies has utilised its latest patented topology implemented in SMT

and hybrid technologies to achieve this performance level. Typical applications for the

NFC40 Series include telecommunications, remote exchanges, automation equipment,

back plane power architectures and distributed power.

SPECIFICATION

OUTPUT SPECIFICATIONS

Voltage adjustability

Total error band

(See Note 1)

Ripple and noise

Transient response

All specifications are typical at nominal input, full load at 25°C unless otherwise stated

GENERAL SPECIFICATIONS

±10%

Efficiency

Isolation voltage

Switching frequency

See table

Input/output

Fixed

80%, min.

500VAC, 710VDC, min.

300kHz ±5.0%

VDE0805, EN60950

IEC950, UL1950

CSA C22.2 No. 950

Black coated metal with

Non-conductive base

UL94V-0

80g (2.8oz)

All outputs (See Note 8)

Single outputs

±2% typ., ±3% max.

Auxiliary outputs ±3% typ., ±5% max.

5Hz to 20MHz

All outputs

100mV pk-pk, max.

20mV rms

Approvals and

standards

Case material

0.25% FL to 0.5% FL ±2% max. dev.,

100µs recovery

±0.02%/°C max.

±0.03%/°C max.

Material flammability

Clamp type

See table

Continuous

automatic recovery

Singles

Triples, to maintain auxiliary

output regulation

0.5A

Weight

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

(See Note 11)

Temperature coefficient Single outputs

Auxiliary outputs

Overvoltage protection

Short circuit protection

Minimum main output

current

Single output

Triple output

INPUT SPECIFICATIONS

Input voltage range

Input filter

Remote ON/OFF

Logic compatibility

OFF

Synchronization function

Frequency control range

Sync signal

Logic compatibility

24V

48V

(See Note 9)

18 to 36VDC

36 to 72VDC

External capacitor

CMOS and TTL

>1.5V or open collector

<0.4V

Operating frequency control

±10%

Negative-going pulse,

maximum 25% of duty cycle

CMOS/TTL

Relative humidity

Altitude

Operating ambient

See curves

Operating Case

-25°C to +105°C

Non-operating

-55°C to +125°C

Extended temp.,

-40°C to +105°C

option, case (Note 10)

Heatsink option (Note 5)

See curves

Derating

See curves for

baseplate cooling details

Non-condensing

Operating

Non operating

5% to 95% RH

10,000 feet max.

40,000 feet max.

International Safety Standard Approvals

VDE0805/EN60950/IEC950 File No. 10401-3336-1082

UL1950 File No. E136005

CSA C22.2 No. 950 File No. LR41062C

Data Sheet © Artesyn Technologies® 2000

The information and specifications contained in this data sheet are believed to be correct at time of publication. However, Artesyn Technologies accepts no responsibility for consequences arising

from printing errors or inaccuracies. Specifications are subject to change without notice. No rights under any patent accompany the sale of any such product(s) or information contained herein.

PAGE 142

DC/DC CONVERTERS

40W DC/DC

40 Watt

Wide input DC/DC converters

INPUT

VOLTAGE

(2)

OUTPUT

VOLTAGE

5VDC

12VDC

15VDC

OVP

(3)

MAX. OUTPUT

INPUT

CURRENT

3.5A

2.8A

7.5/±0.75A

3.5A

2.8A

7.5/±0.75A

2.15A

2.1A

2.15A

1.1A

1.05A

1.1A

(4)

TYPICAL

EFFICIENCY

80%

82%

80%

81%

83%

81%

MODEL NUMBER

(5, 10)

METRIC INSERTS

IMPERIAL INSERTS

NFC40-24S05-M

NFC40-24S12-M

NFC40-24S15-M

NFC40-24T05-12-M

NFC40-24T05-15-M

NFC40-48S05-M

NFC40-48S12-M

NFC40-48S15-M

NFC40-48T05-12-M

NFC40-48T05-15-M

NFC40-24S05

NFC40-24S12

NFC40-24S15

NFC40-24T05-12

(6)

NFC40-24T05-15

(6)

NFC40-48S05

NFC40-48S12

NFC40-48S15

NFC40-48T05-12

(6)

NFC40-48T05-15

(6)

18-36VDC

36-72VDC

Notes

6.2VDC

15VDC

18VDC

5/±12VDC 6.2VDC/None

5/±15VDC 6.2VDC/None

5VDC

12VDC

15VDC

6.2VDC

15VDC

18VDC

5/±12VDC 6.2VDC/None

5/±15VDC 6.2VDC/None

Mechanical notes

A All pins are actual to within 0.010 inch (0.25mm) diameter.

B Tolerances:

Imperial

0.XX ± 0.02 inch

0.XXX ± 0.005 inch

Metric

0.X ± 0.5mm

0.XX ± 0.13mm

Unless otherwise specified.

C Metric dimensions in brackets, e.g. 1.250” (31.75mm).

D Copper tracks must not be routed under the four converter stand-offs.

Total error band is defined at the static output regulation at 25°C, includ-

ing initial setting accuracy, line voltage within stated limits and load cur-

rent within stated limits.

2 Nominal input voltages are 24VDC and 48VDC.

3 Overvoltage protection threshold. Any main output overvoltage clamps

the output to a very low output voltage. A prolonged overvoltage

condition will cause the converter to fail.

4 Maximum value at full load, nominal input voltage.

5 For top-mounted heatsink option with Metric screws, add ‘-MX’ or ‘-MY’

to these model numbers. For side-mounted heatsink option, add ‘-ME’ or

‘-MS’ to the model number e.g.

NFC40-48S05-MX.

For top-mounted heatsink option with Imperial screws, add ‘-1X’ or ‘-1Y’

to these model numbers. For side-mounted heatsink option, add ‘-1E’ or

‘-1S’ to the model number e.g.

NFC40-48S05-1X.

6 For triple output units, common pins (5 and 8) should be connected

externally.

7 Output V1 must return to common 1 and outputs V2 and V3 to common 2

and 3 respectively in order to meet noise and regulation specifications.

8 The external trim function enables the tailoring of the output voltage to

the applications exact requirements. Adjustments within ±10% are

possible. On the triple output models the auxiliary output voltages (output

2 and 3) will vary proportionally to the main output.

9 An external filter capacitor is required for normal operation. The

capacitor should be capable of handling 1A/2A ripple current for 48V/24V

models. Artesyn suggests: Nippon Chemi-Con SXE series, 220µF/100V

for the NFC40-48xxx-M and the Nippon Chemi-Con LXF Series,

1500µF/50V for the NFC40-24xxx-M.

10 Extended operating temperature range. To specify an NFC40 that

operates down to –40°C, add the suffix ‘4’ or ‘-4’ to the model number

e.g.

NFC40-48S05-M4

NFC40-48S05-4

for Metric and Imperial screw

measurements respectively.

11 Case temperature must not exceed +105°C. Curve may be extended or

restricted depending on available cooling.

0.50 (12.7)

0.020

0.010 (0.51

0.25)

0.4 (1.02) Dia. Typ.

0.15 (3.8) Min.

1.900

0.010

(48.26

0.25)

Square

0.05 (1.3)

1.800

(45.72)

0.200 (5.08)

0.600

1.250 1.100

(15.24)

(31.75) (27.94)

0.100

(2.54)

0.500 (12.700)

0.200 (5.080)

0.300 7.620

0.600 0.800

(15.24) (20.32)

0.22

0.03 (5.6±0.8) Dia. Stand-off (4 Places)

0.20 (5.10)

2.20 (55.90)

Square

Metric: M3 Tap Thru. (4 Places) Designated with the

suffix '-M' at the end of the model number

Imperial: #4-40 VNC-2B Tap. Thru. (4 places)

Designated without the suffix '-M' at the end of the

model number

ALL DIMENSIONS IN INCHES (mm)

Auxiliary Load Regulation

NFC40-XXT05-12-M

7.5

OUTPUT

5 VOLT OUTPUT

PIN CONNECTIONS

PIN NUMBER

SINGLE OUTPUT

+ Input

– Input

Control

No Connection

+ Output

Common

Trim

(6,7)

TRIPLE OUTPUT

+ Input

– Input

Control

+ Vout 2

Common 2, 3

6.0

200

400

OUTPUT CURRENT

600

750

4.0

2.0

.50

Auxiliary Load Regulation

NFC40-XXT05-15-M

6.0

200

400

600

OUTPUT CURRENT

750

4.0

2.0

.50

5 VOLT OUTPUT (A)

OUTPUT VOLTAGE

– Vout 3

+ Vout 1

Common 1

Trim

7.5

http://www.artesyn.com

PAGE 143

40W DC/DC

DC/DC CONVERTERS

40 Watt

Wide input DC/DC converters

Derating Curves

The derating curves shown are based on measurements of actual

power supplies and reflect Artesyn Technologies conservative

design guidelines. Adherence to these guidelines contributes to the

high reliability of our products by restricting the maximum operating

semiconductor junction temperatures to 125°C which is well below

the component manufacturers’ maximum limits.

Key to power derating curves:

Natural convection.

150 linear feet per minute forced air flow.

300 linear feet per minute forced air flow.

Maximum case temperature

- MX or

-1X

Side Mounted

- MY or

(0..08

-1Y

)

(0..08

)

Heatsink Mounting Options

Top Mounted

Power Derating Curve

Without Additional Heatsink

100

OUTPUT POWER (%)

"-4" OPTION

-40

-20

100

120

AMBIENT TEMPERATURE (°C)

(36.2

.00

- MS or

)

-1S

(36.2

.00

)

- ME or

-1E

Heatsink options:

Two heatsink kits are available for the NFC40: top mounted and side

mounted. Each heatsink may be oriented parallel to or perpendicular

to the direction of the pins, thus providing optimum flexibility for

cooling requirements.

Top mounted heatsink

If board area is at a premium in your application then the top

mounted heatsink should be used. This heatsink kit comes com-

plete with screws and is mounted as shown in the diagram over. To

fit the heatsink, place it in the required orientation, and tighten the

four screws. The order number for the top mounted heatsink kit with

Metric screws is:

NFC40-HTSK-T.

The order number for the top

mounted heatsink kit with Imperial screws is:

NFC40-HTSK-T-I.

Side mounted heatsink

With many applications, e.g. rack systems, the profile must be kept

to a minimum. The side mounted heatsink is intended to meet the

requirements of low profile applications. The NFC40 with this

heatsink option is 12.7mm (0.5 inch) high. The kit contains two side

mounted heatsinks, which must be fitted opposite to one another on

the NFC40. The order number for the side mounted heatsink is:

NFC40-HTSK-S

Factory fitted heatsinks

As a further option, Artesyn Technologies offers factory fitted

heatsinks. Simply add the suffix as described by the diagrams

above to the part number: e.g.

NFC40-48S12-MY

NFC40-

48S12-1Y

for Metric and Imperial screws respectively.

Power Derating Curve

With Side Mounted Heatsink

100

OUTPUT POWER (%)

"-4" OPTION

-40

-20

100

120

AMBIENT TEMPERATURE (°C)

Power Derating Curve

With Top Mounted Heatsink

100

OUTPUT POWER (%)

"-4" OPTION

-40

-20

100

120

EXTERNAL OUTPUT TRIMMING

(8)

Output can be externally trimmed

by ±10% using either method shown below.

PIN 7

10K

PIN 8

TRIM

DOWN

TRIM

PIN 9

TRIM

UP/DOWN

DS_NFC40_20000101.PDF

AMBIENT TEMPERATURE (°C)

PAGE 144