DC/DC CONVERTERS

36-50W High Efficiency DC/DC Converters

1

2 YEAR WARRANTY

EXQ50 Series

Single output

(with derating)

EXQ50 series high-efficiency, open-frame, isolated DC/DC converters have an industry

standard quarter-brick footprint and a height of just 0.4 inches. The converters provide

up to 50 Watts of output power, are capable of delivering very high current at low

voltages, and offer exceptional power densities for today’s high-end applications. The

first four models in the series feature an input voltage range of 33 to 75VDC and are

available with output voltages of 5.0V, 3.3V, 2.5V or 1.8V. The output voltage of each

model is adjustable from 90% to 110% of its nominal value. Typical efficiencies are

90% for the 5V model, 89% for the 3.3V, 88% for the 2.5V and 86.5% for the 1.8V. All

EXQ50 series converters have a remote on/off capability, and are fully protected against

over-voltage, over-temperature and short-circuit conditions. Featuring full international

safety approval, including EN60950 (TÜV Product Service) and UL/cUL 60950, EXQ50

series converters reduce compliance costs and time to market.

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

EMC CHARACTERISTICS

Conducted emissions

EN55022 (See Note 2)

Level A

EN55022 (See Note 2)

Level B

Radiated emissions

EN55022

Level A

Immunity:

ESD air

EN61000-4-2

8kV, 15kV

ESD contact

EN61000-4-2

6kV, 8kV

EFT DC Input

EN61000-4-4

2kV (NP)

Radiated field enclosure

EN61000-4-3

10V/m

Conducted (DC power)

EN61000-4-6

10V (NP)

Conducted (signal)

EN61000-4-6

10V (NP)

Input transients

ETS 300 132-2, ETR 283

GENERAL SPECIFICATIONS

Efficiency

See table

Operational insulation

Input/output

1500VDC

Switching frequency

Fixed

350kHz

Approvals and

EN60950 (TÜV Product Service)

standards (See Note 4)

UL/cUL60950

Material flammability

UL94V-0

Weight

25g (0.88oz)

MTBF

MIL-HDBK-217F

>292,000 hours

@ 40°C, 100% load

ground benign

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

Operating temperature

-40°C to +90°C

Non-operating

-40°C to +125°C

OUTPUT SPECIFICATIONS

Total error

(See Note 8)

4.5%

Set point accuracy

±2.0% max.

Line regulation

Low line to high line

0.3% max.

Load regulation

Full load to min. load

0.3% max.

Voltage adjustability

90% to 110%

Output remote

(See Note 9)

10%

sense range

Minimum load

0A

Overshoot

At turn-on and turn-off

None

Undershoot

None

Ripple and noise

5Hz to 20MHz

120mV pk-pk

30mV rms

Transient response

5% max. deviation

(See Note 1)

200µs recovery to

within total error band

INPUT SPECIFICATIONS

Input voltage range

48Vin nominal

33 to 75VDC

Input current

No load

60mA

Remote OFF

25mA

Input current (max.)

1.73A max. @ Io max.

(See Note 3)

and Vin = 33

Input reflected ripple

(See Note 5)

110mA (pk-pk)

Active high remote ON/OFF

(See Note 7)

Logic compatibility

Open collector ref to -input

ON

Open circuit or <12VDC

OFF

<1.2VDC

Undervoltage lockout

Power up

32.5V

Power down

30.5V

Start-up time

Power up

10ms

(See Note 6)

Remote ON/OFF

3ms

SPECIFICATIONS

File Name: EXQ50S.PDF Rev: 01 Nov 2002

TÜV