EXB250-48S1V5J-RNJ - Emerson Network Power - Embedded Power

The EXB250 is a new high efficiency, open-frame, isolated

165 Watt converter series. The EXB250 delivers very high output

current at low voltages and excellent useable power density for

today's high-end applications. The design takes advantage of

open-frame construction to provide a low weight, low thermal

impedance baseplate design. The simplicity of the baseplate

design enables customers to easily manage cooling of the product,

eliminating the guesswork associated with competing products.

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. Typical

efficiencies for the models are 90% for the 3.3V, 88% for the 2.5V,

and 87% for the 1.8V version. The EXB250 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 EXB250

reduces compliance costs and time to market.

Embedded Power for

Business-Critical Continuity

EXB250 48V

SERIES

Special Features

• High efficiency topology, 90%

typical at 3.3V

• High output current, high use-

able power density

• Industry standard footprint

• Wide operating temperature, -

40˚C to +100˚C (baseplate

temperature)

• 90% to 110% output trim

• No minimum load

• Overvoltage protection

• Remote on/off

• Approvals to EN60950 (TÜV

Rheinland) and UL/cUL1950

• Complies with ETS 300 019-1-

3/2-3

• Complies with ETS 300 132-2

(input voltage and current

requirements)

• Complies with ETS 300 386-1

• Available RoHS compliant

• 2 year warranty

Total Power: 165 W

Input Voltage: 33 - 75 VDC

# of Outputs: Single

Rev.10.11.07

exb250 48v series

1 of 36

EXB250 48V SERIES

Single Output

NOTICE SOME MODELS LISTED IN THIS

DOCUMENT HAVE BEEN DISCONTINUED

Please contact your local Artesyn representative

or use the on line model number search tool at

http://www.artesyn.com/powergroup/products.htm

to find a suitable alternative.

Rev.10.11.07

exb250 48v series

2 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Absolute Maximum Ratings

Input Characteristics

Stresses in excess of the maximum ratings can cause permanent damage to the device. Operation of the device is not implied at these or any other

conditions in excess of those given in the specification. Exposure to absolute maximum ratings can adversely affect device

reliability.

All specifications are typical at nominal input Vin = 48V, full load at 25˚C unless otherwise specified.

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input voltage - continuous Vin (cont) -0.3 75 V DC Vin(+) - Vin(-)

Input voltage - peak/surge Vin (peak) -0.3 100 V DC Peaks of any duration,

converter OFF above 80V, non-

latching, unit ON once Vin <75V

Input voltage - remote pin Vrem (peak) -0.3 75 V DC Peaks of any duration

Operating temperature Top -40 100 ˚C Measured at baseplate

Storage temperature Tstorage -40 125 ˚C

Output power (1.2V) Pout (max) 72 W

Output power (1.5V) Pout (max) 90 W

Output power (1.8V) Pout (max) 108 W

Output power (2.5V) Pout (max) 150 W

Output power (3.3V) Pout (max) 165 W

Output power (5V) Pout (max) 165 W

Output power (12V) Pout (max) 165 W

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input voltage - operating Vin (oper) 33 48 75 V DC

Input current - no load (1.2V) lin 67 85 mADC Vin (min) - Vin (max), enabled

Input current - no load (1.5V) lin 80 100 mADC Vin (min) - Vin (max), enabled

Input current - no load (1.8V) lin 110 135 mADC Vin (min) - Vin (max), enabled

Input current - no load (2.5V) lin 95 115 mADC Vin (min) - Vin (max), enabled

Input current - no load (3.3V) lin 114 145 mADC Vin (min) - Vin (max), enabled

Input current - no load (5V) lin 110 145 mADC Vin (min) - Vin (max), enabled

Input current - no load (12V) lin 112 145 mADC Vin (min) - Vin (max), enabled

Input current - Quiescent lin (off) 26 35 mADC Converter disabled

Input voltage variation dv/dt 5 V/ms

Complies with ETS300 132 Part 4.4

Inrush current (i2t) linrush 0.03 A2s

Complies with ETS300 132 Part 4.7,

with recommended LISN and

recommended external bypass

capacitor

Inrush current ratio It/Im6.8

Complies with ETS300 132 Part 4.7,

with recommended LISN and

recommended external bypass

capacitor

Input ripple rejection 50 dB Frequency <1 kHz

Input fuse 10 A Slow Blow/Antisurge HRC

recommended 200V Rating.

See Application Note 119

Rev.10.11.07

exb250 48v series

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Technical Reference Note - EXB250 48V SERIES

Single Output

Turn On/Off

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input voltage - turn on Vin (on) 30 32.5 34.0 V DC

Input voltage - turn off Vin (off) 29 30.5 33.0 V DC

Hysteresis 3 V DC

Turn on delay - enabled, Tdelay 10 14 msec With the Remote On/Off signal

then power applied (power) asserted, time from when Vin >

Vin (oper) until Vout is within

total regulation band

Turn on delay - power Tdelay 3 5 msec With Vin = Vin (nom), then

applied, then enabled (enable) Remote On/Off asserted,

time until Vo is within total error

band

Rise time Trise 1.0 2.0 msec From 10% to 90%, full resistive

load, no external capacitance

Rev.10.11.07

exb250 48v series

4 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Signal Electrical Interface

Reliability and Service Life

Isolation

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input to output test voltage 1500 V DC Test duration 1s

Input to output capacitance 2000 pF

Input to output resistance 100 MΩ Measured with 500 V DC

Input to output insulation system

Operational

Characteristic Symbol Min Typ Max Units Notes and Conditions

Mean time between failure MTBF 1,598,243 Hours Telcordia SR-332,

Vin = Vin (nom); Iout = Iout

(max); ambient 40˚C;

ground benign environment

Mean time between failure MTBF >2,000,000 Hours Demonstrated

HALT testing Completed

Asynchronous dynamic testing Completed

Characteristic - Signal Name Symbol Min Typ Max Units Notes and Conditions

At Remote ON/OFF pin See Notes 1 and 2

Open collector or equivalent

compatible

Control pin open circuit voltage Vih 4 4.5 5 V Iih = 0μA; open circuit voltage

High level input voltage Vih 4 V Converter guaranteed ON

when control pin is

greater than Vih (min)

High level input current Iih 10 μA Current flowing into control pin

when pin is pulled high

(max. at Vih = 75V)

Acceptable high level Iih (leakage) -10 μA Acceptable leakage current from

leakage current signal pin into the open collector

driver (neg = from converter)

Low level input voltage ViI -0.3 1.2 V Converter guaranteed off

when control pin is

less than Vil (max)

Low level input current IiI -0.2 -0.4 mA Vil = 0.4 V

Low level input current Iil (max) -0.2 -0.4 mA ViI = 0.0 V, maximum source

current from converter with

short circuit

Common Protection/Control

Characteristic Symbol Min Typ Max Units Notes and Conditions

Overtemperature shutdown Tots 110 115 120 ˚C Baseplate temperature,

threshold non-latching shutdown

protection

Overtemperature shutdown 4 ˚C

- restart hysteresis

Remote sense compensation 10 % % of Vo (nom), compensation

includes trim. See Application

Note

Rev.10.11.07

exb250 48v series

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Technical Reference Note - EXB250 48V SERIES

Single Output

Environmental Requirements

Other Specifications

Characteristic Symbol Min Typ Max Units Notes and Conditions

Switching frequency fsw 340 400 460 kHz Fixed frequency (all models)

Weight 73 g Statistical weight data available

EMC Electromagnetic

Compatibility

Referenced ETSI standards:

ETS 300 019: Environmental conditions and environmental tests for telecommunications equipment

ETS 300 019: Part 1-3 (1997) Classification of environmental conditions stationary use at weather protected locations

ETS 300 019: Part 2-3 (1997) Specification of environmental tests stationary use at weather protected locations

Phenomenon Port Standard Test level Criteria Notes and conditions

Immunity:

ESD Enclosure EN61000-4-2 6kV contact NP As per ETS 300 386-1 table 5

8kV air RP

EFT DC power EN61000-4-4 2kV NP As per ETS 300 386-1 table 5

4kV LFS

Signal EN61000-4-4 1kV NP See Application Note 119

2kV LFS See Application Note 119

Radiated field Enclosure EN61000-4-3 10V/m NP As per ETS 300 386-1 table 5

Conducted DC power EN61000-4-6 10V NP As per ETS 300 386-1 table 5

Signal EN61000-4-6 10V NP See Application Note 119

Input transients DC power ETS 300 132

ETR 283

Characteristic Symbol Min Typ Max Units Notes and Conditions

Thermal performance -40 100 ˚C Baseplate temperature

Altitude 3000 m Derate total max. output

current by 20%

9843 ft Derate total max. output

current by 20%

10000 m Derate total max. output

current by 50%

32808 ft Derate total max. output

current by 50%

Type Parameter Reference Test Level Notes and Conditions

Air temperature Low IEC 68-2-1 -40˚C

All characteristics and parameters

High IEC 68-2-2 +65˚C extracted from ETS 300 019

Change IEC 68-2-14 -40˚C to +65˚C classes 3.1, 3.2, 3.3, 3.4 and 3.5

Tmax. = +65˚C for T3.4

Relative humidity Low 10%

High IEC 68-2-56 100%

Condensation IEC 68-2-30 90 to 100%

Vibration IEC class 3M5 Freq. velocity IEC 68-2-6 5-9Hz 5mm/s

Freq. acceleration IEC 68-2-6 9-200Hz 1g

Shocks IEC class 3M5 Acceleration IEC 68-2-29 10g

Rev.10.11.07

exb250 48v series

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Technical Reference Note - EXB250 48V SERIES

Single Output

Material Ratings

Model Numbers

Standards Compliance List

Characteristic

EN60950

UL/cUL 1950 3rd edition

TÜV Rheinland

Safety Agency Approvals

EMC Electromagnetic

Compatibility

Phenomenon Port Standard Test level Criteria Notes and conditions

Emission:

Conducted DC power EN55022 Level A With recommended external filter for

compliance bandwidth 20 kHz to 30 MHz,

as per ETS 300 386-1

EN55022 Level B With recommended external filter for

compliance bandwidth 20 kHz to 30 MHz,

as per ETS 300 386-1

Signal EN55022 TBD Bandwidth 150kHz to 30MHz,

as per ETS 300 386-1

Radiated EN55022 TBD Bandwidth 30 MHz to 1 GHz, as per

ETS 300 386-1

Performance criteria:

NP: Normal Performance: EUT shall withstand applied test and operate within relevant limits as specified without damage

RP: Reduced Performance: EUT shall withstand applied test. Reduced performance is permitted within specified limits, resumption to

normal performance shall occur at the cessation of the test

LFS: Loss of Function (self recovery): EUT shall withstand applied test without damage, temporary loss of function permitted during test.

Unit will self recover to normal performance after test

Standard Category

UL/cUL 1950 File Number E135734

TÜV Rheinland Certificate No. R2172505

Characteristic - Signal Name Notes and Conditions

Flammability rating UL94V-0

Material type FR4 PCB, T-LAM IMS - Baseplate

Model Input Output Overvoltage Output Current Typical

Number Voltage Voltage Protection (Max.) Efficiency

EXB250-48S1V2J 33-75 VDC 1.2V 1.44V 60A 84.0%

EXB250-48S1V5J 33-75 VDC 1.5V 1.9V 60A 85.5%

EXB250-48S1V8J 33-75 VDC 1.8V 2.5V 60A 87.0%

EXB250-48S2V5J 33-75 VDC 2.5V 3.0V 60A 88.0%

EXB250-48S3V3J 33-75 VDC 3.3V 4.0V 50A 90.0%

EXB250-48S05J 33-75 VDC 5.0V 6.0V 33A 91.7%

EXB250-48S12J 33-75 VDC 12.0V 14.4V 13.75A 92.0%

Rev.10.11.07

exb250 48v series

7 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Input Characteristics

EXB250-48S1V2J Model

Electrical Characteristics - O/P

EXB250-48S1V2J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input current - maximum Iin (max.) 2.45 2.6 A DC Vin = Vin (min); Iout = Iout

(max); Vo= Vo (nom),

measured at converter

Reflected ripple current Iin (ripple) 9 mA RMS Iout = Iout (max), measured

25 mA pk-pk with standard filter. See

Application Note 119

Input Capacitor ripple current Iin (cap) 125 mA RMS Iout = Iout (max), measured

350 mA pk-pk without standard filter. See

Application Note 119

Input capacitance - Cinput 6 7.5 13.5 μF Internal to converter

Internal

Input capacitance - Cbypass 33 μF Recommended customer

External bypass added capacitance

Characteristic Symbol Min Typ Max Units Notes and Conditions

Nominal set-point voltage Vo (nom) 1.179 1.200 1.221 V DC Vin = Vin (nom); Iout = Iout (nom)

Total regulation band Vo1.164 1.236 V DC For all line, static load and

temperature until end of life.

Line regulation 0.01 0.2 % Iout = Iout (nom), Vin (min)

to Vin (max)

Load regulation 0.02 0.2 % Vin = Vin (nom), Iout (min) to

Iout (max)

Temperature regulation 0.002 0.02 ±%/˚C Vin = Vin (nom), Iout =I

out (max)

Output current continuous Iout 0 60 A DC

Output current - short circuit Isc 65 69 77 A DC Continuous, unit auto recovers

from short, Vo< 100mV

Load transient response - Vdynamic/ 6 % Peak deviation for 50% to 75%

peak deviation Vo (nom) step load, di/dt = 100mA/μsec,

% of Vo (nom)

Load transient response - Trecovery 150 μsec Settling time to within 1% of

recovery output set point voltage for 50%

to 75% load step

External load capacitance Cext 0 15,000 μF Higher load capacitance values

may be possible. Contact Artesyn

Technologies for details

Output voltage - noise Vp-p 60 mV pk-pk Measurement bandwidth 20 MHz

Vrms 20 mV rms See Application Note 119 for

test set-up

RoHS Compliance Ordering Information

The ‘J’ at the end of the part number

indicates that the part is Pb-free

(RoHS 6/6 compliant). TSE RoHS 5/6

(non Pb-free) compliant versions may

be available on special request, please

contact your local sales representative

for details.

Rev.10.11.07

exb250 48v series

8 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Protection and Control Features

EXB250-48S1V2J Model

Efficiency

EXB250-48S1V2J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Overvoltage clamp voltage Vov 1.32 1.44 1.56 V DC Non-latching. See Application

Note 119 for details

Overcurrent limit inception Ioc 69 77 A DC Vo= 90% of Vo (nom)

Output voltage trim range 110 % Trim up (% of Vo nom)

90 % Trim down (% of Vo nom)

See Application Note 119 for

details of trim equations and

trim curves

Open sense voltage 1.15 1.20 1.30 V DC

Characteristic Symbol Min Typ Max Units Notes and Conditions

Efficiency h 82.5 84.0 % Iout = 100% lout (max),

Vin = Vin (nom)

Efficiency h 84.0 85.2 % Iout = 50% Iout (max),

Vin = Vin (nom)

Rev.10.11.07

exb250 48v series

9 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Input Characteristics

EXB250-48S1V5J Model

Electrical Characteristics - O/P

EXB250-48S1V5J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input current - maximum Iin (max.) 3.2 3.4 A DC Vin = Vin (min); Iout = Iout

(max); Vo= Vo (nom),

measured at converter

Reflected ripple current Iin (ripple) 9 mA RMS Iout = Iout (max), measured

25 mA pk-pk with standard filter. See

Application Note 119

Input Capacitor ripple current Iin (cap) 125 mA RMS Iout = Iout (max), measured

350 mA pk-pk without standard filter. See

Application Note 119

Input capacitance - Cinput 6 7.5 13.5 μF Internal to converter

Internal

Input capacitance - Cbypass 33 μF Recommended customer

External bypass added capacitance

Characteristic Symbol Min Typ Max Units Notes and Conditions

Nominal set-point voltage Vo (nom) 1.476 1.50 1.524 V DC Vin = Vin (nom); Iout = Iout (nom)

Total regulation band Vo1.455 1.545 V DC For all line, static load and

temperature until end of life.

Line regulation 0.01 0.2 % Iout = Iout (nom), Vin (min)

to Vin (max)

Load regulation 0.02 0.2 % Vin = Vin (nom), Iout (min) to

Iout (max)

Temperature regulation 0.002 0.02 ±%/˚C Vin = Vin (nom), Iout =I

out (max)

Output current continuous Iout 0 60 A DC

Output current - short circuit Isc 65 69 77 A DC Continuous, unit auto recovers

from short, Vo< 100mV

Load transient response - Vdynamic/ 6 % Peak deviation for 50% to 75%

peak deviation Vo (nom) step load, di/dt = 100mA/μsec,

% of Vo (nom)

Load transient response - Trecovery 150 μsec Settling time to within 1% of

recovery output set point voltage for 50%

to 75% load step

External load capacitance Cext 0 15,000 μF Higher load capacitance values

may be possible. Contact Artesyn

Technologies for details

Output voltage - noise Vp-p 60 mV pk-pk Measurement bandwidth 20 MHz

Vrms 20 mV rms See Application Note 119 for

test set-up

Rev.10.11.07

exb250 48v series

10 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Protection and Control Features

EXB250-48S1V5J Model

Efficiency

EXB250-48S1V5J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Overvoltage clamp voltage Vov 1.66 1.95 V DC Non-latching. See Application

Note 119 for details

Overcurrent limit inception Ioc 69 77 A DC Vo= 90% of Vo (nom)

Output voltage trim range 110 % Trim up (% of Vo nom)

90 % Trim down (% of Vo nom)

See Application Note 119 for

details of trim equations and

trim curves

Open sense voltage 1.45 1.53 1.59 V DC

Characteristic Symbol Min Typ Max Units Notes and Conditions

Efficiency h 84.5 85.5 % Iout = 100% lout (max),

Vin = Vin (nom)

Efficiency h 85.5 86.5 % Iout = 50% Iout (max),

Vin = Vin (nom)

Rev.10.11.07

exb250 48v series

11 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Input Characteristics

EXB250-48S1V8J Model

Electrical Characteristics - O/P

EXB250-48S1V8J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input current - maximum Iin (max.) 3.8 3.9 A DC Vin = Vin (min); Iout = Iout

(max); Vo= Vo (nom),

measured at converter

Reflected ripple current Iin (ripple) 6 mA RMS Iout = Iout (max), measured

25 mA pk-pk with standard filter. See

Application Note 119

Input Capacitor ripple current Iin (cap) 90 mA RMS Iout = Iout (max), measured

225 mA pk-pk without standard filter. See

Application Note 119

Input capacitance - Cinput 4.8 6.0 10.8 μF Internal to converter

Internal

Input capacitance - Cbypass 33 μF Recommended customer

External bypass added capacitance

Characteristic Symbol Min Typ Max Units Notes and Conditions

Nominal set-point voltage Vo (nom) 1.77 1.80 1.83 V DC Vin = Vin (nom); Iout = Iout (nom)

Total regulation band Vo1.74 1.85 V DC For all line, static load and

temperature until end of life.

Line regulation 0.01 0.1 % Iout = Iout (nom), Vin (min)

to Vin (max)

Load regulation 0.02 0.2 % Vin = Vin (nom), Iout (min) to

Iout (max)

Temperature regulation 0.002 0.02 ±%/˚C Vin = Vin (nom), Iout =I

out (max)

Output current continuous Iout 0 60 A DC

Output current - short circuit Isc 65 69 77 A DC Continuous, unit auto recovers

from short, Vo< 100mV

Load transient response - Vdynamic/ 6 % Peak deviation for 50% to 75%

peak deviation Vo (nom) step load, di/dt = 100mA/μsec,

% of Vo (nom)

Load transient response - Trecovery 150 μsec Settling time to within 1% of

recovery output set point voltage for 50%

to 75% load step

External load capacitance Cext 0 15,000 μF Higher load capacitance values

may be possible. Contact Artesyn

Technologies for details

Output voltage - noise Vp-p 60 mV pk-pk Measurement bandwidth 20 MHz

Vrms 20 mV rms See Application Note 119 for

test set-up

Rev.10.11.07

exb250 48v series

12 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Protection and Control Features

EXB250-48S1V8J Model

Efficiency

EXB250-48S1V8J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Overvoltage clamp voltage Vov 2.0 2.34 V DC Non-latching. See Application

Note 119 for details

Overcurrent limit inception Ioc 69 77 A DC Vo= 90% of Vo (nom)

Output voltage trim range 110 % Trim up (% of Vo nom)

90 % Trim down (% of Vo nom)

See Application Note 119 for

details of trim equations and

trim curves

Open sense voltage 1.75 1.83 1.89 V DC

Characteristic Symbol Min Typ Max Units Notes and Conditions

Efficiency h 85.5 87 % Iout = 100% lout (max),

Vin = Vin (nom)

Efficiency h 86.5 88 % Iout = 50% Iout (max),

Vin = Vin (nom)

Rev.10.11.07

exb250 48v series

13 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Input Characteristics

EXB250-48S2V5J Model

Electrical Characteristics - O/P

EXB250-48S2V5J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input current - maximum Iin (max.) 5.4 5.5 A DC Vin = Vin (min); Iout = Iout

(max); Vo= Vo (nom)

(measured at converter)

Reflected ripple current Iin (ripple) 9 mA RMS Iout = Iout (max), measured

25 mA pk-pk with standard filter. See

Application Note 119

Input Capacitor ripple current Iin (cap) 89 mA RMS Iout = Iout (max), measured

250 mA pk-pk without standard filter. See

Application Note 119

Input capacitance - Cinput 6.0 7.5 13.5 μF Internal to converter

Internal

Input capacitance - Cbypass 33 μF Recommended customer

External bypass added capacitance

Characteristic Symbol Min Typ Max Units Notes and Conditions

Nominal set-point voltage Vo (nom) 2.46 2.50 2.54 V DC Vin = Vin (nom); Iout = Iout (nom)

Total regulation band Vo2.42 2.58 V DC For all line, static load and

temperature until end of life.

Line regulation 0.01 0.1 % Iout = Iout (nom), Vin (min)

to Vin (max)

Load regulation 0.02 0.2 % Vin = Vin (nom), Iout (min) to

Iout (max)

Temperature regulation 0.002 0.02 ±%/˚C Vin = Vin (nom), Iout =I

out (max)

Output current continuous Iout 0 60 A DC

Output current - short circuit Isc 65 69 77 A DC Continuous, unit auto recovers

from short, Vo< 100mV

Load transient response - Vdynamic/ 6 % Peak deviation for 50% to 75%

peak deviation Vo (nom) step load, di/dt = 100mA/μsec,

% of Vo (nom)

Load transient response - Trecovery 150 μsec Settling time to within 1% of

recovery output set point voltage for 50%

to 75% load step

External load capacitance Cext 0 15,000 μF Higher load capacitance values

may be possible. Contact Artesyn

Technologies for details

Output voltage - noise Vp-p 60 mV pk-pk Measurement bandwidth 20 MHz

Vrms 20 mV rms See Application Note 119 for

test set-up

Rev.10.11.07

exb250 48v series

14 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Protection and Control Features

EXB250-48S2V5J Model

Efficiency

EXB250-48S2V5J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Overvoltage clamp voltage Vov 2.78 3.125 V DC Non-latching. See Application

Note 119 for details

Overcurrent limit inception Ioc 69 77 A DC Vo= 90% of Vo (nom)

Output voltage trim range 110 % Trim up (% of Vo nom)

90 % Trim down (% of Vo nom)

See Application Note 119 for

details of trim equations and

trim curves

Open sense voltage 2.46 2.54 2.62 V DC

Characteristic Symbol Min Typ Max Units Notes and Conditions

Efficiency h 87 88 % Iout = 100% Iout (max),

Vin = Vin (nom)

Efficiency h 89 90 % Iout = 50% Iout (max),

Vin = Vin (nom)

Rev.10.11.07

exb250 48v series

15 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Input Characteristics

EXB250-48S3V3J Model

Electrical Characteristics - O/P

EXB250-48S3V3J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Nominal set-point voltage Vo (nom) 3.25 3.30 3.35 V DC Vin = Vin (nom); Iout = Iout (nom)

Total regulation band Vo3.20 3.40 V DC For all line, static load and

temperature until end of life.

Line regulation 0.01 0.1 % Iout = Iout (nom), Vin (min)

to Vin (max)

Load regulation 0.02 0.2 % Vin = Vin (nom), Iout (min) to

Iout (max)

Temperature regulation 0.002 0.02 ±%/˚C Vin = Vin (nom), Iout =I

out (max)

Output current continuous Iout 0 50 A DC

Output current - short circuit Isc 55 59 68 A DC Continuous, unit auto recovers

from short, Vo< 100mV

Load transient response - Vdynamic/ 6 % Peak deviation for 50% to 75%

peak deviation Vo (nom) step load, di/dt = 100mA/μsec,

% of Vo (nom)

Load transient response - Trecovery 150 μsec Settling time to within 1% of

recovery output set point voltage for 50%

to 75% load step

External load capacitance Cext 0 15,000 μF Higher load capacitance values

may be possible. Contact Artesyn

Technologies for details

Output voltage - noise Vp-p 60 mV pk-pk Measurement bandwidth 20 MHz

Vrms 20 mV rms See Application Note 119 for

test set-up

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input current - maximum Iin (max.) 5.6 5.7 A DC Vin = Vin (min); Iout = Iout

(max); Vo= Vo (nom)

(measured at converter)

Reflected ripple current Iin (ripple) 9 mA RMS Iout = Iout (max), measured

25 mA pk-pk with standard filter. See

Application Note 119

Input Capacitor ripple current Iin (cap) 125 mA RMS Iout = Iout (max), measured

350 mA pk-pk without external Pi filter. See

Application Note 119

Input capacitance - Cinput 6.0 7.5 13.5 μF Internal to converter filter

Internal

Input capacitance - Cbypass 33 μF Recommended customer

External bypass added capacitance

Rev.10.11.07

exb250 48v series

16 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Protection and Control Features

EXB250-48S3V3J Model

Efficiency

EXB250-48S3V3J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Overvoltage clamp voltage Vov 3.65 4.125 V DC Non-latching. See Application

Note for details

Overcurrent limit inception Ioc 58 68 A DC Vo= 90% of Vo (nom)

Output voltage trim range 110 % Trim up (% of Vo nom)

90 % Trim down (% of Vo nom)

See Application Note 118 for

details of trim equations and

trim curves

Open sense voltage 3.15 3.34 3.45 V DC

Characteristic Symbol Min Typ Max Units Notes and Conditions

Efficiency h 89 90 % Iout = 100% Iout (max),

Vin = Vin (nom)

Efficiency h 89.5 90.5 % Iout = 50% Iout (max),

Vin = Vin (nom)

Rev.10.11.07

exb250 48v series

17 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Input Characteristics

EXB250-48S05J Model

Electrical Characteristics - O/P

EXB250-48S05J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input current - maximum Iin (max.) 5.6 5.7 A DC Vin = Vin (min); Iout = Iout

(max); Vo= Vo (nom),

measured at converter

Reflected ripple current Iin (ripple) 9 mA RMS Iout = Iout (max), measured

25 mA pk-pk with standard filter. See

Application Note 119

Input Capacitor ripple current Iin (cap) 125 mA RMS Iout = Iout (max), measured

350 mA pk-pk without standard filter. See

Application Note 119

Input capacitance - Cinput 6 7.5 13.5 μF Internal to converter

Internal

Input capacitance - Cbypass 33 μF Recommended customer

External bypass added capacitance

Characteristic Symbol Min Typ Max Units Notes and Conditions

Nominal set-point voltage Vo (nom) 4.92 5.00 5.08 V DC Vin = Vin (nom); Iout = Iout (nom)

Total regulation band Vo4.85 5.15 V DC For all line, static load and

temperature until end of life.

Line regulation 0.01 0.1 % Iout = Iout (nom), Vin (min)

to Vin (max)

Load regulation 0.02 0.2 % Vin = Vin (nom), Iout (min) to

Iout (max)

Temperature regulation 0.002 0.02 ±%/˚C Vin = Vin (nom), Iout =I

out (max)

Output current continuous Iout 0 33 A DC

Output current - short circuit Isc 35 37.7 43.5 A DC Continuous, unit auto recovers

from short, Vo< 100mV

Load transient response - Vdynamic/ 6 % Peak deviation for 50% to 75%

peak deviation Vo (nom) step load, di/dt = 100mA/μsec,

% of Vo (nom)

Load transient response - Trecovery 150 μsec Settling time to within 1% of

recovery output set point voltage for 50%

to 75% load step

External load capacitance Cext 0 5,000 μF Higher load capacitance values

may be possible. Contact Artesyn

Technologies for details

Output voltage - noise Vp-p 60 mV pk-pk Measurement bandwidth 20 MHz

Vrms 20 mV rms See Application Note 119 for

test set-up

Rev.10.11.07

exb250 48v series

18 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Protection and Control Features

EXB250-48S05J Model

Efficiency

EXB250-48S05J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Overvoltage clamp voltage Vov 5.5 6.0 6.5 V DC Non-latching. See Application

Note 119 for details

Overcurrent limit inception Ioc 35 43.5 A DC Vo= 90% of Vo (nom)

Output voltage trim range 110 % Trim up (% of Vo nom)

90 % Trim down (% of Vo nom)

See Application Note 119 for

details of trim equations and

trim curves

Open sense voltage 4.85 5.00 5.25 V DC

Characteristic Symbol Min Typ Max Units Notes and Conditions

Efficiency h 90.5 91.7 % Iout = 100% lout (max),

Vin = Vin (nom)

Efficiency h 91.0 92 % Iout = 50% Iout (max),

Vin = Vin (nom)

Rev.10.11.07

exb250 48v series

19 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Input Characteristics

EXB250-48S12J Model

Electrical Characteristics - O/P

EXB250-48S12J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Input current - maximum Iin (max.) 5.6 5.7 A DC Vin = Vin (min); Iout = Iout

(max); Vo= Vo (nom),

measured at converter

Reflected ripple current Iin (refl) 9 mA RMS Iout = Iout (max), measured

25 mA pk-pk with standard filter. See

Application Note 119

Input Capacitor ripple current Iin (ripple) 125 mA RMS Iout = Iout (max), measured

350 mA pk-pk without standard filter. See

Application Note 119

Input capacitance - Cinput 6 7.5 13.5 μF Internal to converter

Internal

Input capacitance - Cbypass 33 μF Recommended customer

External bypass added capacitance

Characteristic Symbol Min Typ Max Units Notes and Conditions

Nominal set-point voltage Vo (nom) 11.82 12.00 12.18 V DC Vin = Vin (nom); Iout = Iout (nom)

Total regulation band Vo11.64 12.36 V DC For all line, static load and

temperature until end of life.

Line regulation 0.01 0.1 % Iout = Iout (nom), Vin (min)

to Vin (max)

Load regulation 0.02 0.2 % Vin = Vin (nom), Iout (min) to

Iout (max)

Temperature regulation 0.002 0.02 ±%/˚C Vin = Vin (nom), Iout =I

out (max)

Output current continuous Iout 0 13.75 A DC

Output current - short circuit Isc 10 15.8 19 A DC Continuous, unit auto recovers

from short, Vo< 100mV

Load transient response - Vdynamic/ 6 % Peak deviation for 50% to 75%

peak deviation Vo (nom) step load, di/dt = 100mA/μsec,

% of Vo (nom)

Load transient response - Trecovery 150 μsec Settling time to within 1% of

recovery output set point voltage for 50%

to 75% load step

External load capacitance Cext 0 1,000 μF Higher load capacitance values

may be possible. Contact Artesyn

Technologies for details

Output voltage - noise Vp-p 60 mV pk-pk Measurement bandwidth 20 MHz

Vrms 20 mV rms See Application Note 119 for

test set-up

Rev.10.11.07

exb250 48v series

20 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Protection and Control Features

EXB250-48S12J Model

Efficiency

EXQ125-48S12J Model

Characteristic Symbol Min Typ Max Units Notes and Conditions

Overvoltage clamp voltage Vov 13.5 15.6 V DC Non-latching. See Application

Note 119 for details

Overcurrent limit inception Ioc 15 16.6 19 A DC Vo= 90% of Vo (nom)

Output voltage trim range 110 % Trim up (% of Vo nom)

90 % Trim down (% of Vo nom)

See Application Note 119 for

details of trim equations and

trim curves

Open sense voltage 11.6 12.0 12.5 V DC

Characteristic Symbol Min Typ Max Units Notes and Conditions

Efficiency h 91 92.1 % Iout = 100% lout (max),

Vin = Vin (nom)

Efficiency h 91 92.0 % Iout = 50% Iout (max),

Vin = Vin (nom)

Rev.10.11.07

exb250 48v series

21 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

5 15 25 35 45 55 65 75 85

0.5 m/s (100 LFM)

1 m/s (200 LFM)

1.5 m/s (300 LFM)

2 m/s (400 LFM)

OUTPUT CURRENT (A)

AMBIENT AIRFLOW TEMPERATURE (ºC)

Figure 1: Derating Curve Output Current vs. Temperature

INPUT VOLTAGE Vin(V)

EFFICIENCY (%)

33 41 50 58 67 75

Figure 2: Efficiency vs. Line

Figure 3: Typical Efficiency vs. Baseplate Temperature Figure 4: Efficiency vs. Load

Figure 5: Turn-on Characteristic Figure 6: Control On/Off Characteristic

OUTPUT CURRENT (A)

EFFICIENCY (%)

Low Line

Nom Line

High Line

105

0102030405060

0246810

12 14 16 18 20

0.0

0.5

1.0

1.5

2.0

OUTPUT VOLTAGE (V)

TIME (mSec)

@ Max Input

@ Nom Input

@ Min Input

Input

0246810

12 14 16 18 20

-2.0

-1.0

-1.5

-0.5

0.0

0.5

1.5

1.0

2.0

Output Voltage

Time (mSec)

High Line

Nom Line

Low Line

Signal

EFFICIENCY (%)

BASEPLATE TEMPERATURE (˚C)

82.5

83.0

83.5

84.0

84.5

85.0

-40 -20 0 20 40 60 80 100

EXB250-48S1V2J Model

Rev.10.11.07

exb250 48v series

22 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Figure 9: Output Ripple and Noise Measurement

TIME (1.0 μSec/Div)

VOLTAGE (5mV/Div)

Figure 7: Typical Transient Response 75-50%

Step Load Change

Figure 8: Typical Transient Response 50-75%

Step Load Change

00.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

0.72

0.77

0.82

0.87

0.92

0.97

1.07

1.02

1.12

1.17

1.22

Output Voltage (V)

Time (mSec)

Voltage

Current

00.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

0.86

0.91

0.96

1.01

1.06

1.11

1.21

1.16

1.26

1.31

1.36

Output Voltage (V)

Time (mSec)

Voltage

Current

Figure 10: Output Voltage vs. Output Current

010 20 30 40 50 60 70 80

0.2

0.4

0.6

0.8

1.2

1.0

1.4

OUTPUT VOLTAGE

Time (mSec)

High Line

Nom Line

Low Line

EXB250-48S1V2J Model

Rev.10.11.07

exb250 48v series

23 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S1V5J Model

0.5 m/s (100 LFM)

1 m/s (200 LFM)

1.5 m/s (300 LFM)

2 m/s (400 LFM)

5 15 25 35 45 55 65 75 85

OUTPUT CURRENT (A)

AMBIENT AIRFLOW TEMPERATURE (ºC)

Figure 11: Derating Curve Output Current vs. Temperature

INPUT VOLTAGE Vin(V)

EFFICIENCY (%)

33 42 51 60 69 75

Figure 12: Efficiency vs. Line

Figure 13: Typical Efficiency vs. Baseplate Temperature Figure 14: Efficiency vs. Load

Figure 15: Turn-on Characteristic Figure 16: Control On/Off Characteristic

OUTPUT CURRENT (A)

EFFICIENCY (%)

Low Line

Nom Line

High Line

100

0102030405060

0246810

12 14 16 18 20

0.0

0.5

1.0

1.5

2.0

OUTPUT VOLTAGE (V)

TIME (mSec)

@ Max Input

@ Nom Input

@ Min Input

Input

012345678910

0.0

0.5

1.0

1.5

2.0

OUTPUT VOLTAGE (V)

TIME (mSec)

High Line

Nom Line

Low Line

Signal

EFFICIENCY (%)

BASEPLATE TEMPERATURE (˚C)

-40 -20 0 20 40 60 80 100

Rev.10.11.07

exb250 48v series

24 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S1V5J Model

Figure 19: Output Ripple and Noise Measurement

TIME (1.0 μSec/Div)

VOLTAGE (10mV/Div)

Figure 17: Typical Transient Response 75-50%

Step Load Change

Figure 18: Typical Transient Response 50-75%

Step Load Change

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

1.45

1.60

1.65

1.50

1.55

OUTPUT VOLTAGE (V)

TIME (mSec)

Voltage

Current

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

1.47

1.52

1.37

1.42

OUTPUT VOLTAGE (V)

TIME (mSec)

Voltage

Current

Figure 20: Output Voltage vs. Output Current

OUTPUT VOLTAGE (V)

OUTPUT CURRENT (A)

0.4

0.8

1.2

1.6

020406080

Rev.10.11.07

exb250 48v series

25 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S1V8J Model

0.5 m/s (100 LFM)

1 m/s (200 LFM)

1.5 m/s (300 LFM)

2 m/s (400 LFM)

5 15 25 35 45 55 65 75 85

OUTPUT CURRENT (A)

AMBIENT AIRFLOW TEMPERATURE (ºC)

Figure 21: Derating Curve Output Current vs. Temperature

42 50 58 67 75

INPUT VOLTAGE, Vin(V)

EFFICIENCY (%)

Figure 22: Efficiency vs. Line

Figure 23: Typical Efficiency vs. Baseplate Temperature Figure 24: Efficiency vs. Load

Figure 25: Turn-on Characteristic Figure 26: Control On/Off Characteristic

0.0

100

10.0 20.0 29.9 39.9 49.9 59.9

OUTPUT CURRENT (A)

EFFICIENCY (%)

Low Line

Nom Line

High Line

0 4 8 12 16 20

0.0

0.5

1.5

1.0

2.0

OUTPUT VOLTAGE (V)

TIME (msec)

@ Min Input

@ Nom Input

@ Max Input

Input

0246810

0.0

1.0

0.5

1.5

2.0

OUTPUT VOLTAGE (V)

TIME (msec)

Min Input

Nom Input

Max Input

Input

-20-40 0 20 40 60 80 100

EFFICIENCY (%)

BASEPLATE TEMPERATURE (˚C)

Rev.10.11.07

exb250 48v series

26 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S1V8J Model

Figure 29: Output Ripple and Noise Measurement

TIME (2.0 μSec/Div)

VOLTAGE (20mV/Div)

Figure 27: Typical Transient Response 75-50%

Step Load Change

Figure 28: Typical Transient Response 50-75%

Step Load Change

0.0

1.73

1.78

1.83

0.2 0.4 0.6 0.8 1.0

TIME (msec)

OUTPUT VOLTAGE (V)

Output

Load Step

0.0

1.78

1.83

1.88

0.2 0.4 0.6 0.8 1.0

TIME (msec)

OUTPUT VOLTAGE (V)

Output

Load Step

Figure 30: Output Voltage vs. Output Current

020 40 60 80

0.4

0.8

1.2

2.0

1.6

OUTPUT VOLTAGE (V)

OUTPUT CURRENT (A)

Rev.10.11.07

exb250 48v series

27 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S2V5J Model

0.5 m/s (100 LFM)

1 m/s (200 LFM)

1.5 m/s (300 LFM)

2 m/s (400 LFM)

5 15 25 35 45 55 65 75 85

OUTPUT CURRENT (A)

AMBIENT AIRFLOW TEMPERATURE (ºC)

Figure 31: Derating Curve Output Current vs. Temperature

41 50 58 67 75

INPUT VOLTAGE (V)

EFFICIENCY (%)

Figure 32: Efficiency vs. Line

Figure 33: Typical Efficiency vs. Baseplate Temperature Figure 34: Efficiency vs. Load

Figure 35: Turn-on Characteristic Figure 36: Control On/Off Characteristic

0.0

100

10.0 20.0 29.9 39.9 49.9 59.9

OUTPUT CURRENT (A)

EFFICIENCY (%)

Low Line

Nom Line

High Line

0 4 8 12 16 20

0.0

1.0

2.0

3.0

OUTPUT VOLTAGE (V)

TIME (msec)

@ Min Input

@ Nom Input

@ Max Input

Input

0 2 4 6 8 10

0.0

1.0

2.0

3.0

OUTPUT VOLTAGE (V)

TIME (msec)

Min Input

Nom Input

Max Input

Input

-20-40 0 20 40 60 80 100

EFFICIENCY (%)

BASEPLATE TEMPERATURE (˚C)

Rev.10.11.07

exb250 48v series

28 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S2V5J Model

Figure 39: Output Ripple and Noise Measurement

TIME (2.0 μSec/Div)

VOLTAGE (20mV/Div)

Figure 37: Typical Transient Response 75-50%

Step Load Change

Figure 38: Typical Transient Response 50-75%

Step Load Change

0.0

2.35

2.45

2.55

0.2 0.4 0.6 0.8 1.0

TIME (mSec)

OUTPUT VOLTAGE (V)

Output

Load Step

0.0

2.30

2.50

2.70

0.2 0.4 0.6 0.8 1.0

TIME (msec)

OUTPUT VOLTAGE (V)

Output

Load Step

Figure 40: Output Voltage vs. Output Current

020 40 60 80

0.5

1.0

1.5

2.0

3.0

2.5

OUTPUT VOLTAGE (V)

OUTPUT CURRENT (A)

Rev.10.11.07

exb250 48v series

29 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S3V3J Model

0 m/s (0 LFM)

0.5 m/s (100 LFM)

1 m/s (200 LFM)

1.5 m/s (300 LFM)

5 15 25 35 45 55 65 75 85

OUTPUT CURRENT (A)

AMBIENT AIRFLOW TEMPERATURE (ºC)

Figure 41: Derating Curve Output Current vs. Temperature

41 50 58 67 75

INPUT VOLTAGE, Vin(V)

EFFICIENCY (%)

Figure 42: Efficiency vs. Line

Figure 43: Typical Efficiency vs. Baseplate Temperature Figure 44: Efficiency vs. Load

Figure 45: Turn-on Characteristic Figure 46: Control On/Off Characteristic

0.0

100

8.3 16.6 24.9 33.3 41.6 49.9

OUTPUT CURRENT (A)

EFFICIENCY (%)

Low Line

Nom Line

High Line

0.0

2.0

4.0

4.0 8.0 12.0 16.0 20.0

TIME (msec)

OUTPUT VOLTAGE (V)

@ Min Input

@ Nom Input

@ Max Input

Input

0.0

2.0

4.0

2.0 4.0 6.0 8.0 10.0

TIME (msec)

OUTPUT VOLTAGE (V)

Min Input

Nom Input

Max Input

Input

-20-40 0 20 40 60 80 100

EFFICIENCY (%)

BASEPLATE TEMPERATURE (˚C)

Rev.10.11.07

exb250 48v series

30 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S3V3J Model

Figure 49: Output Ripple and Noise Measurement

TIME (2.0 μSec/Div)

VOLTAGE (40mV/Div)

Figure 47: Typical Transient Response 75-50%

Step Load Change

Figure 48: Typical Transient Response 50-75%

Step Load Change

0.0

3.15

3.25

3.35

0.2 0.4 0.6 0.8 1.0

TIME (msec)

OUTPUT VOLTAGE (V)

Output

Load Step

0.0

3.25

3.35

3.45

0.2 0.4 0.6 0.8 1.0

TIME (msec)

OUTPUT VOLTAGE (V)

Output

Load Step

Figure 50: Output Voltage vs. Output Current

020 40 60 80

0.5

1.0

1.5

2.0

3.5

3.0

2.5

Vout (V)

Iout (Amps)

Rev.10.11.07

exb250 48v series

31 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S05J Model

5 15 25 35 45 55 65 75 85

OUTPUT CURRENT (A)

AMBIENT AIRFLOW TEMPERATURE (ºC)

0.5 m/s (100 LFM)

1 m/s (200 LFM)

1.5 m/s (300 LFM)

2 m/s (400 LFM)

Figure 51: Derating Curve Output Current vs. Temperature

INPUT VOLTAGE Vin(V)

EFFICIENCY (%)

32 40 49 57 66 74

Figure 52: Efficiency vs. Line

Figure 53: Typical Efficiency vs. Baseplate Temperature Figure 54: Efficiency vs. Load

Figure 55: Turn-on Characteristic Figure 56: Control On/Off Characteristic

100

61117

22 27 33

OUTPUT CURRENT (A)

EFFICIENCY (%)

Low Line

Nom Line

High Line

0.0

2.0

6.0

4 8 12 16 20

TIME (msec)

OUTPUT VOLTAGE (V)

@ Min Input

@ Nom Input

@ Max Input

Input

0246810

12 14 16 18 20

-6.0

-4.0

-2.0

0.0

2.0

4.0

6.0

OUTPUT VOLTAGE

Time (mSec)

High Line

Nom Line

Low Line

Signal

90.0

90.5

91.0

91.5

92.0

92.5

93.0

-20-40 0 20 40 60 80 100

EFFICIENCY (%)

BASEPLATE TEMPERATURE (˚C)

Rev.10.11.07

exb250 48v series

32 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S05J Model

Figure 59: Output Ripple and Noise Measurement

20mV/Div

1.0 uSec/Div

Figure 57: Typical Transient Response 75-50%

Step Load Change

Figure 58: Typical Transient Response 50-75%

Step Load Change

00.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

4.51

4.56

4.61

4.66

4.71

4.76

4.86

4.81

4.91

4.96

5.01

Output Voltage (V)

Time (mSec)

Voltage

Current

00.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

4.63

4.68

4.73

4.78

4.83

4.88

4.98

4.93

5.03

5.08

5.13

Output Voltage (V)

Time (mSec)

Voltage

Current

Figure 60: Output Voltage vs. Output Current

10 20 30 40 50

1.0

2.0

3.0

4.0

6.0

5.0

OUTPUT VOLTAGE (V)

OUTPUT CURRENT (A)

Rev.10.11.07

exb250 48v series

33 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S12J Model

5 15 25 35 45 55 65 75 85

0.5 m/s (100 LFM)

1 m/s (200 LFM)

1.5 m/s (300 LFM)

2 m/s (400 LFM)

OUTPUT CURRENT (A)

AMBIENT AIRFLOW TEMPERATURE (ºC)

Figure 61: Derating Curve Output Current vs. Temperature

INPUT VOLTAGE Vin(V)

EFFICIENCY (%)

32 41 49 58 66 74

Figure 62: Efficiency vs. Line

Figure 63: Typical Efficiency vs. Baseplate Temperature Figure 64: Efficiency vs. Load

Figure 65: Turn-on Characteristic Figure 66: Control On/Off Characteristic

100

257911 14

OUTPUT CURRENT (A)

EFFICIENCY (%)

Low Line

Nom Line

High Line

01020304050

2.0

7.0

12.0

OUTPUT VOLTAGE (V)

TIME (msec)

@ Min Input

@ Nom Input

@ Max Input

Input

0510

15 20 25 30 35 40 45 50

-13.0

-8.0

-3.0

2.0

7.0

12.0

Output Voltage

Time (mSec)

High Line

Nom Line

Low Line

Signal

90.0

90.5

91.0

91.5

92.0

92.5

93.0

-20-40 0 20 40 60 80 100

EFFICIENCY (%)

BASEPLATE TEMPERATURE (˚C)

Rev.10.11.07

exb250 48v series

34 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

EXB250-48S12J Model

Figure 69: Typical Output Ripple and Noise Measurement

10mV/Div

1.0 uSec/Div

Figure 67: Typical Transient Response 75-50%

Step Load Change

Figure 68: Typical Transient Response 50-75%

Step Load Change

00.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

11.12

11.22

11.32

11.42

11.52

11.62

11.82

11.72

11.92

12.02

12.12

Output Voltage (V)

Time (mSec)

Voltage

Current

00.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

11.42

11.52

11.62

11.72

11.82

11.92

12.12

12.02

12.22

12.32

12.42

Output Voltage (V)

Time (mSec)

Voltage

Current

Figure 70: Current Limit Characteristic

0510 15 20

2.0

4.0

6.0

8.0

12.0

10.0

OUTPUT VOLTAGE (V)

OUTPUT CURRENT (A)

Rev.10.11.07

exb250 48v series

35 of 36

Technical Reference Note - EXB250 48V SERIES

Single Output

Ø0.128 [Ø3.25]

(4 PLS)

Ø0.054 [Ø1.37]

(7 PLS)

Ø0.094 [Ø2.39]

(2 PLS)

2.280 [57.91]

2.000

[50.80] 2.400

[60.96]

0.200 [5.08]

0.190 [4.83] 1.900 [48.26]

1.700 [43.18]

1.300 [33.02] 1.000 [25.40]

Recommended Hole Pattern

0.700 [17.78]

0.300 [7.62]

0.000 [0.00]

Ø0.080

(2 PLS)

1.700 [43.18]

1.300 [33.02]

1.000 [25.40]

0.700 [17.78]

0.300 [7.62]

0.000 [0.00]

M3x0.5 Threaded

Through (4 PLS)

Ø0.040

(7 PLS)

0.500 [12.70]

*0.21 [5.33]

ALL DIMENSIONS IN INCHES [mm]

*Standard available pin length.

0.145 (3.68) and 0.110 (2.79)

options also available. (See

Notes 3 and 4 for ordering details).

Bottom

View

Top

View

Figure 71: Dimensions and Pinout

Pin Connections

Pin No. Function

1+ Vin

2 Remote ON/OFF

3 No Function

4- Vin

5 - Vout

6 - Sense

7Trim

8 + Sense

9 + Vout

Embedded Power for

Business-Critical Continuity

Rev.10.11.07

exb250 48v series

36 of 36

EXB250 48V SERIES

Single Output

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Network Power logo are trademarks and

service marks of Emerson Electric Co.

Emerson Network Power.

The global leader in enabling

business-critical continuity.

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USA

Telephone: +1 760 930 4600

Facsimile: +1 760 930 0698

Europe (UK)

Waterfront Business Park

Merry Hill, Dudley

West Midlands, DY5 1LX

United Kingdom

Telephone: +44 (0) 1384 842 211

Facsimile: +44 (0) 1384 843 355

Asia (HK)

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Telephone: +852 2176 3333

Facsimile: +852 2176 3888

For global contact, visit:

www.powerconversion.com

technicalsupport@powerconversion.com

While every precaution has been taken to ensure

accuracy and completeness in this literature, Emerson

Network Power assumes no responsibility, and disclaims

all liability for damages resulting from use of this

information or for any errors or omissions.

Notes

1 The control pin is referenced to Vin-.

2 Active low Remote ON/OFF is available. Standard

product is active high. When ordering active low parts,

designate with the Suffix '-R' e.g. EXB250-48S1V2J-RJ.

See Application Note 119 for detailed information

regarding ON/OFF control control implementation.

3 When ordering 0.145" pin lengths designate with the

Suffix'-N',

if the product is already a '-R' suffix product then the

suffix will be '-RNJ'.

4 When ordering 0.110" pin lengths designate with the

Suffix'-K',

if the product is already a '-R' suffix product then the

suffix will be '-RKJ.

CAUTION: Hazardous internal voltages and high tempera-

tures. Ensure that unit is accessible only to trained person-

nel. The user must provide the recommended fusing in

order to comply with safety approvals.