DC/DC CONVERTERS

36-100 W High Efficiency DC/DC Converters

1

2 YEAR WARRANTY

EXQ125 Series

Single output

88% typical at 1.8 V

The EXQ125 is a new ultra high efficiency, open-frame, isolated converter series in

an industry standard quarter-brick footprint that provides up to 100 Watts of output

power. The EXQ125 delivers very high output current at low voltages, and excellent

useable power density for today’s high end applications. The seven models in the

series feature an input voltage range of 33 Vdc to 75 Vdc and are available in output

voltages of 12 V, 5 V, 3.3 V, 2.5 V, 1.8 V, 1.5 V and 1.2 V. The output voltage on each

model is adjustable from 90% to 110% of the nominal value. The EXQ125 series

also has a remote ON/OFF capability. Overcurrent and overvoltage protection

features are included as standard. With full international safety approval including

EN60950 (TÜV Rheinland) and UL/cUL1950, the EXQ125 reduces 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 B

Immunity:

ESD air

EN61000-4-2

8 kV (NP), 15 kV (NP)

ESD contact

EN61000-4-2

6 kV (NP), 8 kV (NP)

Radiated field enclosure

EN61000-4-3

10 V/m (NP)

Conducted (DC power)

EN61000-4-6

10 V (NP)

Conducted (signal)

EN61000-4-6

10 V (NP)

Input transients

ETS 300 132-2, ETR 283

GENERAL SPECIFICATIONS

Efficiency

See table

Operational

Input/output

1500 Vdc

Input/baseplate

1500 Vdc

Switching frequency

Fixed

400 kHz typ.

Approvals and

EN60950 (TÜV Rheinland)

standards (See Note 4)

UL/cUL1950

Material flammability

UL94V-0

Weight

45 g (1.6 oz)

MTBF

Telcordia SR-332

2,284,281 hours

@ 25 °C, 100% load

ground benign

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

Operating baseplate -40 °C to +100 °C

temperature

Non-operating

-40 °C to +125 °C

OUTPUT SPECIFICATIONS

Voltage adjustability

90% to 110%

Set point accuracy

±1.5% max.

Line regulation

Low line to high line

±0.1% max.

Load regulation

Full load to min. load

0.2% max.

Minimum load

0 A

Overshoot

At turn-on and turn-off

None

Undershoot

1.2 V, 1.5 V (Z), 1.8 V (Z),

None

2.5 V (Z) and 3.3 V (Z) models

Ripple and noise

5 Hz to 20 MHz

60 mV pk-pk

20 mV rms

Transient response

2% typ. deviation

(See Note 1)

100 µs recovery to

within 1% of setpoint

INPUT SPECIFICATIONS

Input voltage range

48 Vin nominal

33-75 Vdc

Input current

No load

85 mA

Remote OFF

20 mA

Input current (max.)

3.5 A max. @ Io max.

(See Note 3)

and Vin = 33-75 Vdc

Input reflected ripple

(See Note 5)

300 mA (pk-pk) typ.

Active high remote ON/OFF

Logic compatibility

Open collector ref to -input

ON

Open circuit or >4.0 Vdc

OFF

<1.2 Vdc

Undervoltage lockout

Power up

32.5 V (typ)

Power down

30.5 V (typ)

Start-up time

Power up

6 ms (typ)

(See Note 6)

Remote ON/OFF

2 ms (typ)

SPECIFICATIONS

File Name: exq125s.pdf Rev (02): 17 Nov 2005

TÜV