DC/DC CONVERTERS

36-100W High Efficiency DC/DC Converters

1

2 YEAR WARRANTY

EXQ125 Series

Single output

88% typical at 1.8V

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 to 75VDC and are available in output

voltages of 12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V and 1.2V. 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

8kV (NP), 15kV (NP)

ESD contact

EN61000-4-2

6kV (NP), 8kV (NP)

Radiated field enclosure

EN61000-4-3

10V/m (NP)

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

Input/output

1500VDC

Input/baseplate

1500VDC

Switching frequency

Fixed

400kHz typ.

Approvals and

EN60950 (TÜV Rheinland)

standards (See Note 4)

UL/cUL1950

Material flammability

UL94V-0

Weight

45g (1.6oz)

MTBF

MIL-HDBK-217F

>300,000 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

0A

Overshoot

At turn-on and turn-off

None

Undershoot

1.2V, 1.5V, 1.8V, 2.5V

None

and 3.3V models

Ripple and noise

5Hz to 20MHz

60mV pk-pk

20mV rms

Transient response

2% typ. deviation

(See Note 1)

100µs recovery to

within 1% of setpoint

INPUT SPECIFICATIONS

Input voltage range

48Vin nominal

33 to 75VDC

Input current

No load

85mA

Remote OFF

20mA

Input current (max.)

3.5A max. @ Io max.

(See Note 3)

and Vin = 33 to 75V

Input reflected ripple

(See Note 5)

300mA (pk-pk) typ.

Active high remote ON/OFF

(See Note 7)

Logic compatibility

Open collector ref to -input

ON

Open circuit or >4.0VDC

OFF

<1.2VDC

Undervoltage lockout

Power up

32.5V (typ)

Power down

30.5V (typ)

Start-up time

Power up

6ms (typ)

(See Note 6)

Remote ON/OFF

2ms (typ)

SPECIFICATIONS

File Name: EXQ125S.PDF Rev: 18 June 2002

TÜV