Page 1 of 4 Issued Date：2008/05/21

OUTPUT SPECIFICATIONS

Output power

125 Watts, max.

Voltage accuracy

Full load and Normal Vin

± 1.5%

Minimum load

0%

Voltage adjustability

(Note 5)

+ 10% , -20%

Line regulation

LL to HL at Full Load

±0.2%

Load regulation

No load to Full Load

See table

Remote Sense

(Note 5)

10% of Vout

Ripple and noise

20MHz bandwidth

(Measured with a 1μF M/C and a 10μFT/C)

See table

Temperature coefficient

±

0.02% / ºC, max.

Transient response recovery time

25% load step change

200μS

Over voltage protection threshold

(Non-latching Hiccup)

120% Vout max.

Over Current Protection threshold

110% ~ 140% of Iout Rated

Short circuit protection

Hiccup, automatics recovery

GENERAL SPECIFICATIONS

Efficiency

See table

Isolation voltage

Input to Output

Input to Case

Output to Case

1600VDC, min.

1000VDC, min.

1000VDC, min.

Isolation resistance

10

7

ohms, min.

Isolation capacitance

2500 pF, max.

Switching frequency

270 KHz, typ.

Approvals and standard

IEC60950-1, UL60950-1, EN60950-1

Case material

Aluminum base plate

Weight (approx)

42g (1.46 oz)

MTBF (Note 1)

BELLCORE TR-NWT-000332

MIL-HDBK-217F

2.500 x 10

1.257 x 10

INPUT SPECIFICATIONS

Input voltage range

24V nominal input

48V nominal input

18 – 36VDC

36 – 75VDC

Input filter

L-C type

Input surge voltage 100mS max

24V nominal input

48V nominal input

50VDC

100VDC

Start up time

Nominal Vin and

constant resistive load

Power up

Remote ON/OFF

25mS, typ.

25mS, typ.

Start-up voltage

24V nominal input

48V nominal input

17VDC

34VDC

Shutdown voltage

24V nominal input

48V nominal input

15VDC

32VDC

Remote ON/OFF (Note 6)

Negative logic(Standard)

Positive logic(Option)

DC-DC ON

DC-DC OFF

DC-DC ON

DC-DC OFF

Short or 0V < Vr < 1.2V

Open or 3V < Vr < 15V

Open or 3V < Vr < 15V

Short or 0V < Vr < 1.2V

Input current of remote control pin

Nominal Vin

-0.5~1.0mA

Remote off state input current

Nominal Vin

2.5mA

ENVIRONMENTAL SPECIFICATIONS

Operating base-plate temperature range (Note 7)

-40ºC to +100ºC

(with derating)

Over temperature protection

110ºC, max.

Storage temperature range

-55

Thermal shock

MIL-STD-810F

Vibration

10~55Hz, 2G, 30minutes along X,Y and Z

Humidity , Max , Non-Condensing

95%

EMC CHARACTERISTICS

EMI (Note 8)

EN55022

Class A

Radiated immunity

EN61000-4-3

10 V/m Perf. Criteria A

Fast transient (Note 9)

EN61000-4-4

±

2KV Perf. Criteria B

Surge (Note 9)

EN61000-4-5

±

1KV Perf. Criteria B

Conducted immunity

EN61000-4-6

10 Vr.m.s Perf. Criteria A

APPLICATIONS

Wireless Network

Telecom/Datacom

Industry Control System

Distributed Power Architectures

Semiconductor Equipment

FEATURES

OPTIONS

Positive logic Remote on/off, Pin length

DESCRIPTION

QEB125 single output DC/DC converters provide up to 125 watts of output power

in an industry standard quarter-brick package and footprint. These units are

specifically designed to meet the power needs of low-voltage silicon. All models

feature a wide input range, trimmable output voltage and a 35A current rating.