The EXQ125 is a new high efficiency, open frame, isolated
100 Watt converter series in an industry standard quarter-brick
footprint. The EXQ125 delivers very high output current at low
voltages, and excellent useable output power for today's high-end
applications. The design takes advantage of open-frame
construction to provide a low mass, 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 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. Typical
efficiencies for the models are 91% for the 3.3 V, 90% for the 2.5 V,
and 88% for the 1.8 V version. 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 cUL1950, the EXQ125 reduces compliance costs and time to
market.
Embedded Power for
Business-Critical Continuity
EXQ125 48V
SERIES
Special Features
• High efficiency topology, 91%
typical at 3.3 V, 92% typical at
5 V
• High output current, high use-
able power
• 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: 100 W
Input Voltage: 33 - 75 VDC
# of Outputs: Single
Rev.10.17.07
exq125 48v series
1 of 36
EXQ125 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.10.17.07
exq125 48v series
2 of 36
Technical Reference Note -EXQ125 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 = 48 V, full rated load at 25 ˚C unless otherwise specified.
Characteristic Symbol Min Typ Max Units Notes and Conditions
Input voltage - continuous Vin (cont) -0.3 75 Vdc Vin(+) - Vin(-)
Input voltage - peak/surge Vin (peak) -0.3 100 Vdc Peaks of any duration,
converter OFF above 80 V, non-
latching, unit ON once Vin <75 V
Input voltage - remote pin Vrem (peak) -0.3 75 Vdc Peaks of any duration
Operating temperature Top -40 100 ˚C Measured at baseplate
Storage temperature Tstorage -40 125 ˚C
Output power (12 V) Pout (max) 100 W
Output power (5 V) Pout (max) 100 W
Output power (3.3 V) Pout (max) 82.5 W
Output power (2.5 V) Pout (max) 75 W
Output power (1.8 V) Pout (max) 54 W
Output power (1.5 V) Pout (max) 45 W
Output power (1.2 V) Pout (max) 36 W
Characteristic Symbol Min Typ Max Units Notes and Conditions
Input voltage - operating Vin (oper) 33 48 75 Vdc
Input current - no load (1.2 V) lin 35 60 mAdc Vin (min) - Vin (max), enabled
Input current - no load (1.5 V) lin 45 65 mAdc Vin (min) - Vin (max), enabled
Input current - no load (1.8 V) lin 60 70 mAdc Vin (min) - Vin (max), enabled
Input current - no load (2.5 V) lin 60 75 mAdc Vin (min) - Vin (max), enabled
Input current - no load (3.3 V) lin 65 80 mAdc Vin (min) - Vin (max), enabled
Input current - no load (5 V) lin 70 88 mAdc Vin (min) - Vin (max), enabled
Input current - no load (12 V) lin 65 85 mAdc Vin (min) - Vin (max), enabled
Input current - Quiescent lin (off) 13 20 m Adc Converter disabled
Input voltage variation dv/dt 5 V/ms
Complies with ETS300 132 Part 4.4
Inrush current (i2t) linrush 0.022 A2s
Complies with ETS300 132 Part 4.7,
with recommended LISN and
recommended external bypass
capacitor
Inrush current ratio It/Im11.7
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 5 A Slow Blow/Antisurge HRC
recommended 200 V Rating.
See Application Note 118
Rev.10.17.07
exq125 48v series
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Technical Reference Note -EXQ125 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 Vdc
Input voltage - turn off Vin (off) 29 30.5 33 Vdc
Hysteresis 2.5 Vdc
Turn on delay - enabled, Tdelay 6 10 ms 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 2 5 ms 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 2 ms From 10% to 90%, full resistive
load, no external capacitance
Rev.10.17.07
exq125 48v series
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Technical Reference Note -EXQ125 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 Vdc Test duration 1 s
Input to output capacitance 2000 pF
Input to output resistance 100 MΩ Measured with 500 Vdc
Input to output insulation system
Operational
Characteristic Symbol Min Typ Max Units Notes and Conditions
Mean time between failure MTBF 2,284,281 Hours Telcordia SR-332
Vin = Vin (nom); Iout = Iout
(max); ambient 25 ˚C;
ground benign environment
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 4.5 5.0 V Iih = 0 μA; open circuit voltage
High level input voltage Vih 4.0 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 = 75 V)
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 5 ˚C
- restart hysteresis
Remote sense compensation 10 % % of Vo (nom), compensation
includes trim. See Application
Note 118
Rev.10.17.07
exq125 48v series
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Technical Reference Note -EXQ125 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 45 48 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 6 kV contact NP As per ETS 300 386-1 table 5
8 kV air RP
EFT DC power EN61000-4-4 2 kV NP As per ETS 300 386-1 table 5
4 kV LFS
Signal EN61000-4-4 1 kV NP See Application Note 118
2 kV LFS See Application Note 118
Radiated field Enclosure EN61000-4-3 10 V/m NP As per ETS 300 386-1 table 5
Conducted Dc power EN61000-4-6 10 V NP As per ETS 300 386-1 table 5
Signal EN61000-4-6 10 V NP See Application Note 118
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 +70 ˚C extracted from ETS 300 019
Change IEC 68-2-14 -40 ˚C to +70 ˚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 5-9 Hz 5 mm/s
Freq. acceleration IEC 68-2-6 9-200 Hz 1 g
Shocks IEC class 3M5 Acceleration IEC 68-2-29 10 g
Rev.10.17.07
exq125 48v series
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Technical Reference Note -EXQ125 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 150 kHz 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
Referenced ETSI standards:
ETS 300 386-1 table 5 (1997): Public telecommunication network equipment, EMC requirements
ETS 300 132-2 (1996): Power supply interface at the input to telecommunication equipment: Part 2 operated by direct current (dc)
ETR 283 (1997): Transient voltages at interface A on telecommunication direct current (dc) power distributions
Standard Category
UL/cUL 1950 File Number E135734
TÜV Rheinland Certificate No. R72050216
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
EXQ125-48S1V2J 33-75 Vdc 1.2 V 1.45 V 30 A 86.5%
EXQ125-48S1V5J 33-75 Vdc 1.5 V 1.8 V 30 A 87.5%
EXQ125-48S1V8J 33-75 Vdc 1.8 V 2.25 V 30 A 88%
EXQ125-48S2V5J 33-75 Vdc 2.5 V 3 V 30 A 90%
EXQ125-48S3V3J 33-75 Vdc 3.3 V 3.9 V 25 A 91%
EXQ125-48S05J 33-75 Vdc 5 V 5.9 V 20 A 92%
EXQ125-48S12J 33-75 Vdc 12 V 14.4 V 8.3 A 93%
Rev.10.17.07
exq125 48v series
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Technical Reference Note -EXQ125 48V SERIES
Single Output
Input Characteristics
EXQ125-48S1V2J Model
Electrical Characteristics - O/P
EXQ125-48S1V2J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Input current - operating Iin 0.87 0.89 Adc Vin = Vin (nom); Iout = Iout
(max); Vo= Vo (nom)
Input current - maximum Iin (max.) 1.28 1.30 Adc Vin = Vin (min); Iout = Iout
(max); Vo= Vo (nom),
measured at converter
Input Capacitor ripple current Iin (ripple) 50 mA rms Iout = Iout (max), measured
130 mA pk-pk without standard filter. See
Application Note 118
Reflected ripple current Iin (refl) 2 mA rms Iout = Iout (max), measured
5.5 mA pk-pk with standard filter. See
Application Note 118
Input capacitance - Cinput 2.4 3 5.4 μF Internal to converter
Internal
Input capacitance - Cbypass 33 μF Recommended customer
External bypass added capacitance <0.7 Ohm
ESR
Characteristic Symbol Min Typ Max Units Notes and Conditions
Nominal set-point voltage Vo (nom) 1.182 1.200 1.218 Vdc Vin = Vin (nom); Iout = Iout (nom)
Total regulation band Vo1.164 1.236 Vdc 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 30 Adc
Output current - short circuit Isc 32 35 38 A rms Continuous, unit auto recovers
from short, Vo< 100 mV
Load transient response - Vdynamic/ 6 % Peak deviation for 50% to 75%
peak deviation Vo (nom) step load, di/dt = 100 mA/μs,
% of Vo (nom)
Load transient response - Trecovery 100 150 μs Settling time to within 1% of
recovery output set point voltage for 50%
to 75% load step
External load capacitance Cext 0 10,000 μF Higher load capacitance values
may be possible. Contact Artesyn
Technologies for details
Output voltage - noise Vp-p 45 60 mV pk-pk Measurement bandwidth 20 MHz
Vrms 15 20 mV rms See Application Note 118 for
test set-up
Rev.10.17.07
exq125 48v series
8 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Protection and Control Features
EXQ125-48S1V2J Model
Efficiency
EXQ125-48S1V2J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Overvoltage clamp voltage Vov 1.35 1.55 Vdc Non-latching. See Application
Note 118 for details
Overcurrent limit inception Ioc 32 35 38 Adc 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 1.15 1.20 1.30 Vdc
Characteristic Symbol Min Typ Max Units Notes and Conditions
Efficiency h 85 86.5 % Iout = 100% lout (max),
Vin = Vin (nom)
Efficiency h 85.5 86.5 % Iout = 50% Iout (max),
Vin = Vin (nom)
Rev.10.17.07
exq125 48v series
9 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Input Characteristics
EXQ125-48S1V5J Model
Electrical Characteristics - O/P
EXQ125-48S1V5J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Input current - operating Iin 1.28 1.31 Adc Vin = Vin (nom); Iout = Iout
(max); Vo= Vo (nom)
Input current - maximum Iin (max.) 1.07 1.09 Adc Vin = Vin (min); Iout = Iout
(max); Vo= Vo (nom),
measured at converter
Input Capacitor ripple current Iin (ripple) 70 mA rms Iout = Iout (max), measured
200 mA pk-pk without standard filter. See
Application Note 118
Reflected ripple current Iin (refl) 2 mA rms Iout = Iout (max), measured
5.5 mA pk-pk with standard filter. See
Application Note 118
Input capacitance - Cinput 2.4 3 5.4 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) 1.477 1.500 1.523 Vdc Vin = Vin (nom); Iout = Iout (nom)
Total regulation band Vo1.455 1.545 Vdc 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 30 Adc
Output current - short circuit Isc 32 35 38 A rms Continuous, unit auto recovers
from short, Vo< 100 mV
Load transient response - Vdynamic/ 5 % Peak deviation for 50% to 75%
peak deviation Vo (nom) step load, di/dt = 100 mA/μs,
% of Vo (nom)
Load transient response - Trecovery 100 150 μs Settling time to within 1% of
recovery output set point voltage for 50%
to 75% load step
External load capacitance Cext 0 10,000 μF Higher load capacitance values
may be possible. Contact Artesyn
Technologies for details
Output voltage - noise Vp-p 45 60 mV pk-pk Measurement bandwidth 20 MHz
Vrms 15 20 mV rms See Application Note 118 for
test set-up
Rev.10.17.07
exq125 48v series
10 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Protection and Control Features
EXQ125-48S1V5J Model
Efficiency
EXQ125-48S1V5J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Overvoltage clamp voltage Vov 1.70 1.95 Vdc Non-latching. See Application
Note 118 for details
Overcurrent limit inception Ioc 32 35 38 Adc 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 1.45 1.50 1.55 Vdc
Characteristic Symbol Min Typ Max Units Notes and Conditions
Efficiency h 86 87.5 % Iout = 100% lout (max),
Vin = Vin (nom)
Efficiency h 86 87.5 % Iout = 50% Iout (max),
Vin = Vin (nom)
Rev.10.17.07
exq125 48v series
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Technical Reference Note -EXQ125 48V SERIES
Single Output
Input Characteristics
EXQ125-48S1V8J Model
Electrical Characteristics - O/P
EXQ125-48S1V8J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Input current - operating Iin 1.28 1.31 Adc Vin = Vin (nom); Iout = Iout
(max); Vo= Vo (nom)
Input current - maximum Iin (max.) 1.89 1.92 Adc Vin = Vin (min); Iout = Iout
(max); Vo= Vo (nom),
measured at converter
Input Capacitor ripple current Iin (ripple) 70 mA rms Iout = Iout (max), measured
200 mA pk-pk without standard filter. See
Application Note 118
Reflected ripple current Iin (refl) 2 mA rms Iout = Iout (max), measured
5.5 mA pk-pk with standard filter. See
Application Note 118
Input capacitance - Cinput 2.4 3 5.4 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) 1.773 1.800 1.827 Vdc Vin = Vin (nom); Iout = Iout (nom)
Total regulation band Vo1.746 1.854 Vdc 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 30 Adc
Output current - short circuit Isc 32 35 38 A rms Continuous, unit auto recovers
from short, Vo< 100 mV
Load transient response - Vdynamic/ 3 % Peak deviation for 50% to 75%
peak deviation Vo (nom) step load, di/dt = 100 mA/μs,
% of Vo (nom)
Load transient response - Trecovery 100 150 μs Settling time to within 1% of
recovery output set point voltage for 50%
to 75% load step
External load capacitance Cext 0 10,000 μF Higher load capacitance values
may be possible. Contact Artesyn
Technologies for details
Output voltage - noise Vp-p 45 60 mV pk-pk Measurement bandwidth 20 MHz
Vrms 15 20 mV rms See Application Note 118 for
test set-up
Rev.10.17.07
exq125 48v series
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Technical Reference Note -EXQ125 48V SERIES
Single Output
Protection and Control Features
EXQ125-48S1V8J Model
Efficiency
EXQ125-48S1V8J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Overvoltage clamp voltage Vov 2.0 2.3 Vdc Non-latching. See Application
Note 118 for details
Overcurrent limit inception Ioc 32 35 38 Adc 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 1.77 1.83 1.89 Vdc
Characteristic Symbol Min Typ Max Units Notes and Conditions
Efficiency h 86.5 88 % Iout = 100% lout (max),
Vin = Vin (nom)
Efficiency h 87 88 % Iout = 50% Iout (max),
Vin = Vin (nom)
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Technical Reference Note -EXQ125 48V SERIES
Single Output
Input Characteristics
EXQ125-48S2V5J Model
Electrical Characteristics - O/P
EXQ125-48S2V5J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Input current - operating Iin 1.75 1.78 Adc Vin = Vin (nom); Iout = Iout
(max); Vo= Vo (nom)
Input current - maximum Iin (max.) 2.57 2.60 Adc Vin = Vin (min); Iout = Iout
(max); Vo= Vo (nom)
(measured at converter)
Input Capacitor ripple current Iin (ripple) 90 mA rms Iout = Iout (max), measured
250 mA pk-pk without standard filter. See
Application Note 118
Reflected ripple current Iin (refl) 3 mA rms Iout = Iout (max), measured
7 mA pk-pk with standard filter. See
Application Note 118
Input capacitance - Cinput 2.4 3 5.4 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) 2.462 2.500 2.538 Vdc Vin = Vin (nom); Iout = Iout (nom)
Total regulation band Vo2.425 2.575 Vdc 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 30 Adc
Output current - short circuit Isc 32 35 38 A rms Continuous, unit auto recovers
from short, Vo< 100 mV
Load transient response - Vdynamic/ 2 % Peak deviation for 50% to 75%
peak deviation Vo (nom) step load, di/dt = 100 mA/μs,
% of Vo (nom)
Load transient response - Trecovery 100 150 μs Settling time to within 1% of
recovery output set point voltage for 50%
to 75% load step
External load capacitance Cext 0 10,000 μF Higher load capacitance values
may be possible. Contact Artesyn
Technologies for details
Output voltage - noise Vp-p 45 60 mV pk-pk Measurement bandwidth 20 MHz
Vrms 15 20 mV rms See Application Note 118 for
test set-up
Rev.10.17.07
exq125 48v series
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Technical Reference Note -EXQ125 48V SERIES
Single Output
Protection and Control Features
EXQ125-48S2V5J Model
Efficiency
EXQ125-48S2V5J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Overvoltage clamp voltage Vov 2.8 3.1 Vdc Non-latching. See Application
Note 118 for details
Overcurrent limit inception Ioc 32 35 38 Adc 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 2.50 2.54 2.62 Vdc
Characteristic Symbol Min Typ Max Units Notes and Conditions
Efficiency h 89 90 % Iout = 100% Iout (max),
Vin = Vin (nom)
Efficiency h 89 90 % Iout = 50% Iout (max),
Vin = Vin (nom)
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Technical Reference Note -EXQ125 48V SERIES
Single Output
Input Characteristics
EXQ125-48S3V3J Model
Electrical Characteristics - O/P
EXQ125-48S3V3J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Input current - operating Iin 1.89 1.92 Adc Vin = Vin (nom); Iout = Iout
(max); Vo= Vo (nom)
Input current - maximum Iin (max.) 2.78 2.81 Adc Vin = Vin (min); Iout = Iout
(max); Vo= Vo (nom)
(measured at converter)
Input Capacitor ripple current Iin (ripple) 90 mA rms Iout = Iout (max), measured
250 mA pk-pk without external Pi filter
Reflected ripple current Iin (refl) 3 mA rms Iout = Iout (max), measured
7 mA pk-pk with standard filter. See
Application Note 118
Input capacitance - Cinput 2.4 3 5.4 μF Internal to converter filter
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) 3.250 3.300 3.350 Vdc Vin = Vin (nom); Iout = Iout (nom)
Total regulation band Vo3.20 3.40 Vdc 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 30 Adc
Output current - short circuit Isc 27 29 32 A rms Continuous, unit auto recovers
from short, Vo< 100 mV
Load transient response - Vdynamic/ 2 % Peak deviation for 50% to 75%
peak deviation Vo (nom) step load, di/dt = 100 mA/μs,
% of Vo (nom)
Load transient response - Trecovery 100 150 μs Settling time to within 1% of
recovery output set point voltage for 50%
to 75% load step
External load capacitance Cext 0 10,000 μF Higher load capacitance values
may be possible. Contact Artesyn
Technologies for details
Output voltage - noise Vp-p 45 60 mV pk-pk Measurement bandwidth 20 MHz
Vrms 15 20 mV rms See Application Note 118 for
test set-up
Rev.10.17.07
exq125 48v series
16 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Protection and Control Features
EXQ125-48S3V3J Model
Efficiency
EXQ125-48S3V3J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Overvoltage clamp voltage Vov 3.65 4.10 Vdc Non-latching. See Application
Note for details
Overcurrent limit inception Ioc 27 28.5 32 Adc Vo= 90% of Vo (nom)
Output voltage trim range 110 % Trim up (% of Vo nom)
90 % Trim down (% of Vo nom)
See Application Note for
details of trim equations and
trim curves
Open sense voltage 3.30 3.38 3.45 Vdc
Characteristic Symbol Min Typ Max Units Notes and Conditions
Efficiency h 90 91 % Iout = 100% Iout (max),
Vin = Vin (nom)
Efficiency h 90 91 % Iout = 50% Iout (max),
Vin = Vin (nom)
Rev.10.17.07
exq125 48v series
17 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Input Characteristics
EXQ125-48S05J Model
Electrical Characteristics - O/P
EXQ125-48S05J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Input current - operating Iin 2.27 2.30 Adc Vin = Vin (nom); Iout = Iout
(max); Vo= Vo (nom)
Input current - maximum Iin (max.) 3.34 3.38 Adc Vin = Vin (min); Iout = Iout
(max); Vo= Vo (nom),
measured at converter
Input Capacitor ripple current Iin (ripple) 150 mA rms Iout = Iout (max), measured
500 mA pk-pk without standard filter. See
Application Note 118
Reflected ripple current Iin (refl) 4 mA rms Iout = Iout (max), measured
8 mA pk-pk with standard filter. See
Application Note 118
Input capacitance - Cinput 2.4 3 5.4 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) 4.925 5.000 5.075 Vdc Vin = Vin (nom); Iout = Iout (nom)
Total regulation band Vo4.850 5.150 Vdc 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 20 Adc
Output current - short circuit Isc 22 24 26 A rms Continuous, unit auto recovers
from short, Vo< 100 mV
Load transient response - Vdynamic/ 2 % Peak deviation for 50% to 75%
peak deviation Vo (nom) step load, di/dt = 100 mA/μs,
% of Vo (nom)
Load transient response - Trecovery 100 150 μs Settling time to within 1% of
recovery output set point voltage for 50%
to 75% load step
External load capacitance Cext 0 2,200 μF Higher load capacitance values
may be possible. Contact Artesyn
Technologies for details
Output voltage - noise Vp-p 45 60 mV pk-pk Measurement bandwidth 20 MHz
Vrms 15 20 mV rms See Application Note 118 for
test set-up
Rev.10.17.07
exq125 48v series
18 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Protection and Control Features
EXQ125-48S05J Model
Efficiency
EXQ125-48S05J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Overvoltage clamp voltage Vov 5.6 6.1 Vdc Non-latching. See Application
Note 118 for details
Overcurrent limit inception Ioc 22 24 26 Adc 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 4.85 5.00 5.25 Vdc
Characteristic Symbol Min Typ Max Units Notes and Conditions
Efficiency h 90.8 92 % Iout = 100% lout (max),
Vin = Vin (nom)
Efficiency h 91 92.2 % Iout = 50% Iout (max),
Vin = Vin (nom)
Rev.10.17.07
exq125 48v series
19 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Input Characteristics
EXQ125-48S12J Model
Electrical Characteristics - O/P
EXQ125-48S12J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Input current - operating Iin 2.23 2.26 Adc Vin = Vin (nom); Iout = Iout
(max); Vo= Vo (nom)
Input current - maximum Iin (max.) 3.30 3.33 Adc Vin = Vin (min); Iout = Iout
(max); Vo= Vo (nom),
measured at converter
Input Capacitor ripple current Iin (ripple) 150 mA rms Iout = Iout (max), measured
500 mA pk-pk without standard filter. See
Application Note 118
Reflected ripple current Iin (refl) 4 mA rms Iout = Iout (max), measured
8 mA pk-pk with standard filter. See
Application Note 118
Input capacitance - Cinput 2.4 3 5.4 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 12.18 Vdc Vin = Vin (nom); Iout = Iout (nom)
Total regulation band Vo11.64 12.36 Vdc 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 8.3 Adc
Output current - short circuit Isc 8.8 9.5 11 A rms Continuous, unit auto recovers
from short, Vo< 100 mV
Load transient response - Vdynamic/ 2 % Peak deviation for 50% to 75%
peak deviation Vo (nom) step load, di/dt = 100 mA/μs,
% of Vo (nom)
Load transient response - Trecovery 100 150 μs 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 60 100 mV pk-pk Measurement bandwidth 20 MHz
Vrms 20 30 mV rms See Application Note 118 for
test set-up
Rev.10.17.07
exq125 48v series
20 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Protection and Control Features
EXQ125-48S12J Model
Efficiency
EXQ125-48S12J Model
Characteristic Symbol Min Typ Max Units Notes and Conditions
Overvoltage clamp voltage Vov 13.5 14.6 Vdc Non-latching. See Application
Note 118 for details
Overcurrent limit inception Ioc 8.8 9.5 11 Adc 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 11.6 12 12.5 Vdc
Characteristic Symbol Min Typ Max Units Notes and Conditions
Efficiency h 91.8 93 % Iout = 100% lout (max),
Vin = Vin (nom)
Efficiency h 91.5 92.8 % Iout = 50% Iout (max),
Vin = Vin (nom)
Rev.10.17.07
exq125 48v series
21 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
OUTPUT CURRENT (A)
AMBIENT AIR TEMPERATURE (˚C)
100LFM (0.5m/s)
200LFM (1m/s)
300LFM (1.5m/s)
400LFM (2.0m/s)
0
5
10
15
20
25
30
35
25 35 45 55 65 75 85
Figure 1: Derating Curve with Forced Air
INPUT VOLTAGE (V)
EFFICIENCY (%)
78
80
82
84
86
88
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 (%)
60
65
70
75
80
85
90
95
100
0 5 10 15 20 25 30
Low Line
Nom Line
High Line
0246810
12 14 16 18 20
-2.0
-1.5
-1.0
0.0
-0.5
1.0
0.5
2.0
1.5
Output Voltage (V)
Time (mSec)
@ Max Input
@ Non Input
@ Min Input
Input
012345678910
-2.0
-1.5
-1.0
0.0
-0.5
1.0
0.5
2.0
1.5
Output Voltage (V)
Time (mSec)
High Line
Nom Line
Low Line
Signal
-40
84
83
82
85
86
87
-20 0 20 40 60 80 100
EFFICIENCY (%)
BASEPLATE TEMPERATURE (˚C)
Low Line
Nom Line
High Line
EXQ125-48S1V2J Model
Rev.10.17.07
exq125 48v series
22 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Figure 9: Typical Output Ripple and Noise Measurement
TIME (1.0 μSec/Div)
VOLTAGE (20mV/Div)
Figure 7: Typical Transient Response 75-50%
Step Load Change
Figure 8: Typical Transient Response 50-75%
Step Load Change
0.0
-0.06
-0.04
-0.02
0.00
0.02
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
-0.08
0.0
0.00
0.02
0.04
0.06
0.08
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
Figure 10: Current Limit Characteristic
0 5 10 15 20 25 30 35 40
0
0.2
0.4
0.6
0.8
1.0
1.2
OUTPUT VOLTAGE (A)
OUTPUT CURRENT (AMPS)
Nom Line
1.4
EXQ125-48S1V2J Model
Rev.10.17.07
exq125 48v series
23 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
OUTPUT CURRENT (A)
AMBIENT AIR TEMPERATURE (˚C)
100LFM (0.5m/s)
200LFM (1m/s)
300LFM (1.5m/s)
400LFM (2.0m/s)
0
10
20
30
25 35 45 55 65 75 85
Figure 11: Derating Curve with Forced Air
INPUT VOLTAGE (V)
EFFICIENCY (%)
79
81
83
85
87
89
33 41 50 58 67 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
0
20
40
60
80
100
0 5 10 15 20 25 30
0246810
12 14 16 18 20
-2.0
-1.5
-1.0
0.0
-0.5
1.0
0.5
2.0
1.5
Output Voltage (V)
Time (mSec)
@ Max Input
@ Nom Input
@ Min Input
Input
012345678910
-2.0
-1.5
-1.0
0.0
-0.5
1.0
0.5
2.0
1.5
Output Voltage (V)
Time (mSec)
High Line
Nom Line
Low Line
Signal
EFFICIENCY (%)
BASEPLATE TEMPERATURE (˚C)
82
83
84
85
86
87
88
89
-40 -20 0 20 40 60 80 100
Low Line
Nom Line
High Line
EXQ125-48S1V5J Model
Rev.10.17.07
exq125 48v series
24 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Figure 19: Typical Output Ripple and Noise Measurement
TIME (2.0 μSec/Div)
VOLTAGE (40mV/Div)
Figure 17: Typical Transient Response 75-50%
Step Load Change
Figure 18: Typical Transient Response 50-75%
Step Load Change
0.0
-0.10
-0.05
0.00
0.05
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
0.0
0.00
0.05
0.10
0.15
0.20
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
Figure 20: Current Limit Characteristic
0 5 10 15 20 25 30 35 40
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
OUTPUT VOLTAGE
OUTPUT CURRENT (AMPS)
Nom Line
EXQ125-48S1V5J Model
Rev.10.17.07
exq125 48v series
25 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
25
0
5
10
15
20
25
30
35
55
35 45 65 75 85
OUTPUT CURRENT (A)
AMBIENT AIR TEMPERATURE (˚C)
100LFM (0.5m/s)
200LFM (1m/s)
300LFM (1.5m/s)
400LFM (2.0m/s)
Figure 21: Derating Curve with Forced Air
33
80
82
84
88
86
90
41 50 58 67 75
INPUT VOLTAGE (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
20
40
60
80
100
15.0
5.0 10.0 20.0 25.0 30.0
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
-40
86
85
84
87
88
89
-20 0 20 40 60 80 100
EFFICIENCY (%)
BASEPLATE TEMPERATURE (˚C)
Low Line
Nom Line
High Line
EXQ125-48S1V8J Model
Rev.10.17.07
exq125 48v series
26 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Figure 29: Typical 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
0.00
-0.060
-0.040
-0.020
0.000
0.020
0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
0.00
0.000
0.020
0.040
0.060
0.080
0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
Figure 30: Current Limit Characteristic
0 5 10 15 20 25 30 35 40
0
0.4
0.8
1.2
1.6
2.0
OUTPUT VOLTAGE
OUTPUT CURRENT AMPS
Nom Line
EXQ125-48S1V8J Model
Rev.10.17.07
exq125 48v series
27 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
Figure 35: Turn-on Characteristic
Figure 31: Derating Curve with Forced Air
Figure 33: Typical Efficiency vs. Baseplate Temperature
Figure 32: Efficiency vs. Line
Figure 34: Efficiency vs. Load
Figure 36: Control On/Off Characteristic
0
0
20
40
60
80
100
15.0
5.0 10.0 20.0 25.0 30.0
OUTPUT CURRENT (A)
EFFICIENCY (%)
Low Line
Nom Line
High Line
0 2 4 6 8 10
1.0
2.0
3.0
OUTPUT VOLTAGE (V)
TIME (mSec)
Input
@ Min Input
@ Nom Input
@ Max Input
0 4 8 12 16 20
0.0
1.0
2.0
3.0
OUTPUT VOLTAGE (V)
TIME (mSec)
Input
@ Min Input
@ Nom Input
@ Max Input
-40
88
87
86
89
90
91
-20 0 20 40 60 80 100
EFFICIENCY (%)
BASEPLATE TEMPERATURE (˚C)
Low Line
Nom Line
High Line
33
82
84
86
90
88
92
41 50 58 66 75
INPUT VOLTAGE (V)
EFFICIENCY (%)
EXQ125-48S2V5J Model
25
0
5
10
15
20
25
30
35
55
35 45 65 75 85
OUTPUT CURRENT (A)
AMBIENT AIR TEMPERATURE (˚C)
100LFM (0.5m/s)
200LFM (1m/s)
300LFM (1.5m/s)
400LFM (2.0m/s)
Rev.10.17.07
exq125 48v series
28 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
0.0
0.000
0.050
0.100
0.150
0.200
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
0.0
-0.100
-0.050
0.000
0.050
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
TIME (1.0 μSec/Div)
(VOLTAGE) 10mV/Div
Figure 37: Typical Transient Response 75-50%
Step Load Change
Figure 38: Typical Transient Response 50-75%
Step Load Change
Figure 39: Output Ripple and Noise Measurement Figure 40: Current Limit Characteristic
0 5 10 15 20 25 30 35 40
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT VOLTAGE
OUTPUT CURRENT (AMPS)
Nom Line
EXQ125-48S2V5J Model
Rev.10.17.07
exq125 48v series
29 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
32
83
85
87
91
89
93
41 50 58 66 75
INPUT VOLTAGE(V)
EFFICIENCY (%)
-40
89
88
87
90
91
92
-20 0 20 40 60 80 100
EFFICIENCY (%)
BASEPLATE TEMPERATURE (˚C)
Low Line
Nom Line
High Line
0
0
20
40
60
80
100
12.5
4.2 8.3 16.7 20.8 25.0
OUTPUT CURRENT (A)
EFFICIENCY (%)
Low Line
Nom Line
High Line
0 4 8 12 16 20
0.0
1.0
3.0
2.0
4.0
OUTPUT VOLTAGE
TIME (mSec)
@ Min Input
@ Nom Input
@ Max Input
Input
0246810
0.0
1.0
3.0
2.0
4.0
OUTPUT VOLTAGE
TIME (mSec)
Min Input
Nom Input
Max Input
Input
Figure 41: Derating Curve with Forced Air 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
EXQ125-48S3V3J Model
25
0
5
10
15
20
25
30
35
55
35 45 65 75 85
OUTPUT CURRENT (A)
AMBIENT AIR TEMPERATURE (˚C)
100LFM (0.5m/s)
200LFM (1m/s)
300LFM (1.5m/s)
400LFM (2.0m/s)
Rev.10.17.07
exq125 48v series
30 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
0.0
0.000
0.050
0.100
0.150
0.200
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
0.0
-0.100
-0.050
0.000
0.050
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
TIME (2.0μSec/Div)
VOLTAGE (20mV/Div)
Figure 49: Output Ripple and Noise Measurement
Figure 47: Typical Transient Response 75-50%
Step Load Change
Figure 48: Typical Transient Response 50-75%
Step Load Change
Figure 50: Current Limit Characteristic
0 5 10 15 20 25 30 35
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
OUTPUT VOLTAGE
OUTPUT CURRENT (AMPS)
Nom Line
EXQ125-48S3V3J Model
Rev.10.17.07
exq125 48v series
31 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
OUTPUT CURRENT (A)
AMBIENT AIR TEMPERATURE (˚C)
100LFM (0.5m/s)
200LFM (1m/s)
300LFM (1.5m/s)
400LFM (2.0m/s)
0
5
10
15
20
25 35 45 55 65 75 85
Figure 51: Derating Curve with Forced Air
INPUT VOLTAGE (V)
EFFICIENCY (%)
84
86
88
90
92
94
33 41 50 58 66 75
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
0
0
20
40
60
80
100
10
3.3 6.6 13.3 16.6 20
OUTPUT CURRENT (A)
EFFICIENCY (%)
Low Line
Nom Line
High Line
0246810
12 14 16 18 20
-6.0
-4.0
0.0
-2.0
4.0
2.0
6.0
Output Voltage (V)
Time (mSec)
@ Max Input
@ Nom Input
@ Min Input
Input
012345678910
-6.0
-4.0
0.0
-2.0
4.0
2.0
6.0
Output Voltage (V)
Time (mSec)
High Line
Nom Line
Low Line
Signal
EFFICIENCY (%)
BASEPLATE TEMPERATURE (˚C)
Low Line
Nom Line
High Line
88
89
90
91
92
93
-40 -20 0 20 40 60 80 100
EXQ125-48S05J Model
Rev.10.17.07
exq125 48v series
32 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
0.0
0.00
0.10
0.20
0.20 0.40 0.60 0.80 1.00
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
0.0
-0.15
-0.10
-0.05
0.00
0.05
0.20 0.40 0.60 0.80 1.00
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
TIME (2.0 μSec/Div)
VOLTAGE (20mV/Div)
Figure 59: Output Ripple and Noise Measurement
Figure 57: Typical Transient Response 75-50%
Step Load Change
Figure 58: Typical Transient Response 50-75%
Step Load Change
Figure 60: Current Limit Characteristic
0 5 10 15 20 25 30
0
1.0
2.0
3.0
4.0
5.0
6.0
OUTPUT VOLTAGE
OUTPUT CURRENT (AMPS)
Nom Line
EXQ125-48S05J Model
Rev.10.17.07
exq125 48v series
33 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
OUTPUT CURRENT (A)
AMBIENT AIR TEMPERATURE (˚C)
100LFM (0.5m/s)
200LFM (1m/s)
300LFM (1.5m/s)
400LFM (2.0m/s)
0
2
4
6
8
40 45 50 55 60 65 70 75 80 85
Figure 61: Derating Curve with Forced Air
INPUT VOLTAGE (V)
EFFICIENCY (%)
85
87
89
91
93
95
33 41 50 58 67 75
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
OUTPUT CURRENT (A)
EFFICIENCY (%)
Low Line
Nom Line
High Line
0
20
40
60
80
100
0134678
0246810
12 14 16 18 20
2.0
7.0
12.0
Output Voltage (V)
Time (mSec)
@ Max Input
@ Nom Input
@ Min Input
Input
0246810
12 14 16 18 20
2.0
7.0
12.0
Output Voltage (V)
Time (mSec)
High Line
Nom Line
Low Line
Signal
-40
91
90
89
92
93
94
-20 0 20 40 60 80 100
EFFICIENCY (%)
BASEPLATE TEMPERATURE (˚C)
Low Line
Nom Line
High Line
EXQ125-48S12J Model
Rev.10.17.07
exq125 48v series
34 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
0.0
0.00
0.10
0.20
0.30
0.40
0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
0.0
-0.30
-0.20
-0.10
0.00
0.10
0.05 0.10 0.05 0.20 0.25 0.30 0.35 0.40 0.45 0.50
OUTPUT VOLTAGE (V)
TIME (mSec)
Voltage
Current
-0.40
TIME (2.0 μSec/Div)
VOLTAGE (20mV/Div)
Figure 69: Output Ripple and Noise Measurement
Figure 67: Typical Transient Response 75-50%
Step Load Change
Figure 68: Typical Transient Response 50-75%
Step Load Change
Figure 70: Current Limit Characteristic
0 2 4 6 8 10 12
0
2
4
6
8
10
12
14
OUTPUT VOLTAGE
OUTPUT CURRENT (AMPS)
Nom Line
EXQ125-48S12J Model
Rev.10.17.07
exq125 48v series
35 of 36
Technical Reference Note -EXQ125 48V SERIES
Single Output
ALL DIMENSIONS IN INCHES [mm]
Recommended
Hole Pattern
M3 x 0.5 Threaded
Through (4 PLS)
Ø0.128 [Ø3.25]
(4 PLS)
Ø0.073 [Ø1.85]
(2 PLS)
0.000 [0.00]
0.215 [5.46]
0.070 [1.78]
0.070
[1.78]
0.365 [9.27]
0.515 [13.08]
0.665 [16.89]
0.815 [20.70]
0.50 [12.70]
0.215 [5.4 ]
0.515 [13.08 ]
0.815 [20.70 ]
*
0.20 [5.08]
1
2
34
5
6
7
8
0.000 [0.00]
0.215 [5.46]
0.365 [9.27]
0.515 [13.08]
0.665 [16.89]
0.815 [20.70]
0.215 [5.36 ]
0.515 [13.8 ]
0.815 [20.70]
1.030 [26.16]
0.000 [0.00] 3
2
18
7
6
5
4
Ø0.040 [Ø1.09]
(6 PLS) Ø0.060 [Ø1.52]
(2 PLS)
2.000 [50.80]
2.280 [57.91]
1.860 [47.24]
0.210 [5.33]
0.210 [5.33]
1.450
[36.83]
1.030
[26.16]
Bottom View
Top View
*Standard available pin length.
0.145 (3.68) and 0.110 (2.79)
options also available. (See
Notes 3 and 4 for ordering details)
Figure 71: Dimensions and Pinout
Pin Connections
Pin No. Function
1+ Vin
2 ON/OFF
3- Vin
4 - Vout
5 - Sense
6Trim
7 + Sense
8 + Vout
Embedded Power for
Business-Critical Continuity
Rev.10.17.07
exq125 48v series
36 of 36
EXQ125 48V SERIES
Single Output
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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. EXQ125-48S3V3-RJ.
See Application Note 118 for detailed information
regarding ON/OFF control control implementation.
3 When ordering 0.145" pin lengths designate with the
Suffix'-N',
e.g. EXQ125-48S3V3-NJ. If the product is already a '-
R'suffix product then the suffix will be '-RNJ', e.g
EXQ125-48S3V3-RNJ.
4 When ordering 0.110" pin lengths designate with the
Suffix'-K',
e.g. EXQ125-48S3V3-KJ. If the product is already a '-R'
suffix product then the suffix will be '-RKJ’ e.g EXQ125-
48S3V3-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.
