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4:1 input voltage range no minimum load required 6a on 3.3v (48v) output at 50?c in still air wide operating temperature with overtemperature protection 10% output voltage trim overvoltage protection remote on/off control approved to en60950, ul1950, 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 pin compatible with nfc15 and nfc20 series fixed switching frequency basic insulation system (input to output) the cxa20 is a new 20w addition to the cxa family of open-frame, isolated, dc/dc converters. the five model series features a 4:1 input voltage range of 18 to 75vdc, making it suitable for a wide variety of communications and distributed power applications. with its 2.0 x 1.6 inch industry standard footprint, the cxa20 provides an easy upgrade option for new and existing artesyn customers seeking a high- performance, cost-effective power supply. the cxa20 is available in output voltages of 3.3v, 5v, 12v, 5v and 12v. the 3.3v version delivering up to 6a is fully rated to 20w. typical efficiency for the cxa20 is 83 percent. designed using artesyns custom control chip, automated component placement and planar magnetics, the cxa20 affords enhanced performance and reliability through low component count and conservative component deratings. the cxa20 offers remote on/off, as well as overvoltage, overtemperature and short circuit protection features. with full international safety approval including en60950 and cul1950, the cxa20 reduces system compliance costs and time to market. it provides basic insulation from input to output and can operate in high ambient temperatures with or without airflow. cxa20 series single and dual output cxa20 series | 20 w dc/dc isolated dc/dc converters 1 [ 2 year warranty ]
absolute maximum ratings input characteristics turn on/off sxa10 series | 1 0w dc/dc cxa20 series | 20 w dc/dc isolated dc/dc converters 2 characteristic symbol min typ max units notes and conditions input voltage - turn on vin (on) - 16.5 18 vdc input voltage - turn off vin (off) 14 15.5 18 vdc hysteresis 1 vdc turn on delay - enabled, tdelay - 10 20 msec with the enable signal asserted, then power applied (power) this is the time from when the input voltage reaches the minimum specified operating voltage until the output voltage is within the total regulation band turn on delay - power tdelay - 10 20 msec vin = vin (nom), then enabled. applied, then enabled (enable) this is the time taken until the output voltage is within the total error band rise time trise - 5 10 msec from 10% to 90%; full resistive load, no external capacitance characteristic symbol min typ max units notes and conditions input voltage - operating vin (oper) 18 - 75 vdc input current - no load lin 18 22 madc vin (min) - vin (max), enabled input current - quiescent lin (off) 5 10 madc converter disabled input voltage rise/fall time dv/dt 5 v/ms as per ets300-132 inrush current (i 2 t or peak) linrush - a 2 s as per ets300-132 input ripple rejection 60 - db frequency <1 khz input fuse 2 a slow blow/anti-surge, hrc recommended, 200 v rated 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 devi ce reliability. all specifications are at nominal input, full resistive load and 25 ? c unless otherwise stated. characteristic symbol min typ max units notes and conditions input voltage - continuous vin (cont) -0.3 80 vdc vin(+) - vin(-) input voltage - peak/surge vin (peak) -0.3 100 vdc 2s max. non repetitive or standard/level input voltage remote pin vrem (peak) -0.3 75 vdc peaks of any duration operating temp. - singles top -40 +105 ?c measured at thermal reference point, see note 1 and fig. 8.1 operating temp. - duals top -40 +105 ?c measured at thermal reference point, see note 1 and fig. 8.2 storage temperature tstorage -55 +125 ?c
cxa20 series | 20 w dc/dc isolated dc/dc converters 3 www.artesyn.com signal electrical interface common protection/control reliability and service life isolation characteristic symbol min typ max units notes and conditions input to output test voltage 1500 vdc test duration 1s input to output capacitance 1500 pf input to output resistance 100 m measured with 500 vdc input to output insulation basic system characteristic symbol min typ max units notes and conditions mean time between failure mtbf 400,000 hours mil-hdbk-217f, vin = vin (nom); iout = iout (max); ambient 25?c; ground benign environment mean time between failure mtbf tbd hours demonstrated characteristic - signal name symbol min typ max units notes and conditions at remote/control on/off pin see notes 2 and 3 control pin open circuit voltage vih (oc) 3 5 6 v iih = 0a; open circuit voltage high level input voltage vih 2 v converter guaranteed on when control pin is greater than vih (min) high level input current iih 100 a current flowing into control pin when pin is pulled high acceptable high level iih (leakage) -50 a acceptable leakage current from leakage current signal pin into the open collector driver (neg = from converter) low level input voltage vii 1.2 v converter guaranteed off when control pin is less than vil (max) low level input current iii -150 a vil = 0.4 v low level input current iil (max) -200 a vii = 0.0 v; maximum source current from converter with short circuit characteristic symbol min typ max units notes and conditions overtemperature shutdown tots 115 120 125 ?c pcb temperature at ptc(s), threshold (singles) non-latching shutdown protection overtemperature shutdown - - 1 - ?c - restart hysteresis remote sense compensation na mv there is no remote compensation available on this device
sxa10 series | 1 0w dc/dc cxa20 series | 20 w dc/dc isolated dc/dc converters 4 other specifications characteristic symbol min typ max units notes and conditions switching frequency fsw 360 400 440 khz fixed frequency weight - 26 - g environmental requirements 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 characteristic symbol min typ max units notes and conditions thermal performance -40 +60 ?c dependent on input voltage see notes 1, 5 and figures 1.1-1.5 and 8 altitude 3,000 m derate max. output 9,864 ft current by 20% 10,000 m derate max. output 32,821 ft current by 50% characteristic 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 +60?c (t3.4) extracted from ets 300 019 change iec 68-2-14 -40?c to +60?c classes 3.1, 3.2, 3.3, 3.4 and 3.5 relative humidity low - 10% high iec 68-2-56 93% damp heat, 4 days condensation iec 68-2-30 90 to 100% damp heat, 2 cycles, 25 to 35?c vibration iec class 3m5 freq. velocity iec 68-2-6 5-9hz 5mm/s freq. acceleration iec 68-2-6 9-200hz 1g mil-std-202f method 204 cond. a shocks iec class 3m5 acceleration iec 68-2-29 10g mil-std-202f method 213b cond. f phenomenon port standard test level criteria notes and conditions immunity: esd enclosure en61000-4-2 6kv cont np as per ets 300 386-1 table 5 8kv air np 8kv cont rp 15kv 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 as per ets 300 386-1 table 5 2kv lfs radiated field enclosure en61000-4-3 10v/m np as per ets 300 386-1 table 5 surges indoor signal en61000-4-5 500v rp 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 input transients dc power ets 300 132, etr 283
model input output overvoltage output current typical number voltage voltage protection (6) (max.) efficiency CXA20-48S3V3 18-75 vdc 3.3v 3.7v 6a 80% cxa20-48s05 18-75 vdc 5v 6.67v 4a 83% cxa20-48s12 18-75 vdc 12v 14.25v 1.66a 83% cxa20-48d05 18-75 vdc 5v 6.67v 2a ea. 84% cxa20-48d12 18-75 vdc 12v 14.25v 0.83a ea. 84% cxa20 series | 20 w dc/dc isolated dc/dc converters 5 www.artesyn.com emc electromagnetic compatibility material ratings model numbers safety agency approvals standards compliance list standard category en60950 ul/cul1950 3rd edition vde en60950 (vde0805) : 1997 + a11 characteristic - signal name notes and conditions flammability rating ul94v-0 material type fr4 pcb 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, resumptio n 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 du ring 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 telecommunications direct current (dc) power distributions characteristic ul/cul 1950 file number e136005 vde reference number 10401-3336-0154/31hjk de1-8142 (cb certificate number) vde license number tba phenomenon port standard test level criteria notes and conditions emission: conducted dc power en55022 level a see recommended external filter (see application note 107) for compliance. bandwidth 20 khz to 30 mhz, as per ets 300 386-1 en55022 level b see recommended external filter (see application note 107) for compliance. bandwidth 20 khz to 30 mhz, as per ets 300 386-1 signal en55022 level b bandwidth 150khz to 30mhz, as per ets 300 386-1 radiated en55022 level b bandwidth 30 mhz to 1 ghz, as per (see application note 107) ets 300 386-1, with cu ground plane
sxa10 series | 1 0w dc/dc cxa20 series | 20 w dc/dc isolated dc/dc converters 6 input characteristics CXA20-48S3V3 model electrical characteristics - o/p CXA20-48S3V3 model characteristic symbol min typ max units notes and conditions input current - operating iin 0.52 0.53 adc vin = vin (nom); iout = iout (max); vo = vo (nom) input current - maximum iin (max) 1.41 1.45 adc vin = vin (min); iout = iout (max); vo = nom reflected ripple current iin (ripple) 3 10 ma rms iout = iout (max), measured with no external bypass capacitor reflected ripple current iin (ripple) 20 40 ma pk-pk iout = iout (max), measured with no external bypass capacitor input capacitance - internal cinput 1.5 f internal to converter filter (all models) (ceramic) characteristic symbol min typ max units notes and conditions nominal set-point voltage vout (nom) 3.25 3.30 3.35 vdc vin = vin (nom); iout = iout (nom); t = 25?c total regulation band vout 3.16 - 3.43 vdc for all line, static load and temperature until end of life. line regulation - 0.10 0.20 % iout = iout (nom) vin (min) - vin (max) load regulation - 0.20 0.30 % vin = vin (nom) iout (min) - iout (max) temperature regulation 0.02 %/?c vin = vin (nom) iout = iout (nom) output current continuous iout 0.00 6.00 adc output current - short circuit isc 5.00 6.00 a rms continuous, unit auto recovers from short, load resistance <20 m output voltage - noise vp-p 50 75 mv pk-pk measurement bandwidth 20 mhz vrms 13 20 mv rms measurement bandwidth 20 mhz see application note 107 for measurement set-up details
cxa20 series | 20 w dc/dc 7 www.artesyn.com isolated dc/dc converters protection and control features CXA20-48S3V3 model efficiency CXA20-48S3V3 model characteristic symbol min typ max units notes and conditions overvoltage clamp voltage vov 3.70 4.10 vdc non-latching. refer to application note 107 overcurrent limit inception ioc - 8 9 adc vout = 90% of vout (nom) output voltage trim range 10.0 11.0 15.0 % trim up 10.0 11.0 15.0 % trim down open sense voltage na na na vdc no sense pins on this device characteristic symbol min typ max units notes and conditions efficiency h 79.0 80.0 % iout = 100% iout (max), vin = 48 vdc efficiency h 78.0 79.0 % iout = 50% iout (max), vin = 48 vdc electrical characteristics - o/p CXA20-48S3V3 model characteristic symbol min typ max units notes and conditions load transient response - vdynamic 1.0 2.0 % peak deviation for 50% to 75% peak deviation step load, di/dt = 100 ma/sec load transient response - trecovery 100 300 sec settling time to within 1% of recovery output set point voltage for 50% to 75% step load external load capacitance cext 0 10,000 f vin = 18 to 36 vdc 2,000 f vin = 36 to 75 vdc
sxa10 series | 1 0w dc/dc cxa20 series | 20 w dc/dc isolated dc/dc converters 8 input characteristics cxa20-48s05 model electrical characteristics - o/p cxa20-48s05 model characteristic symbol min typ max units notes and conditions input current - operating iin 0.50 0.51 adc vin = vin (nom); iout = iout (max); vo = vo (nom) input current - maximum iin (max) 1.31 1.40 adc vin = vin (min); iout = iout (max); vo = nom reflected ripple current iin (ripple) 3 10 ma rms iout = iout (max), measured with no external bypass capacitor reflected ripple current iin (ripple) 20 40 ma pk-pk iout = iout (max), measured with no external bypass capacitor input capacitance - internal cinput 1.5 f internal to converter filter (all models) (ceramic) characteristic symbol min typ max units notes and conditions nominal set-point voltage vout (nom) 4.925 5.00 5.075 vdc vin = vin (nom); iout = iout (nom); t = 25?c total regulation band vout 4.80 - 5.20 vdc for all line, static load and temperature until end of life line regulation - 0.10 0.20 % iout = iout (nom) vin (min) - vin (max) load regulation - 0.10 0.20 % vin = vin (nom) iout (min) - iout (max) temperature regulation - - 0.02 %/?c vin = vin (nom), iout = iout (nom) output current continuous iout 0 4.00 adc output current - short circuit isc 3.30 5.00 a rms continuous, unit auto recovers from short, load resistance <20 m output voltage - noise vp-p 60 75 mv pk-pk measurement bandwidth 20 mhz vrms 9.5 20 mv rms measurement bandwidth 20 mhz see application note 107 for measurement set-up details
cxa20 series | 20 w dc/dc 9 www.artesyn.com isolated dc/dc converters protection and control features cxa20-48s05 model efficiency cxa20-48s05 model characteristic symbol min typ max units notes and conditions overvoltage clamp voltage vov 6.67 7.67 vdc non-latching refer to application note 107 overcurrent limit inception ioc - 6.1 6.50 adc vout = 90% of vout (nom) output voltage trim range 10.0 11 13.0 % trim up 10.0 11 13.0 % trim down open sense voltage na na na vdc no sense pins on this device characteristic symbol min typ max units notes and conditions efficiency h 82.0 83.0 % iout = 100% iout (max), vin = 48 vdc efficiency h 81.0 82.0 % iout = 50% iout (max), vin = 48 vdc electrical characteristics - o/p cxa20-48s05 model characteristic symbol min typ max units notes and conditions load transient response - vdynamic 0.5 2.0 % peak deviation for 50% to 75% peak deviation step load, di/dt = 100 ma/sec load transient response - trecovery 100 300 sec settling time to within 1% of recovery output set point voltage for 50% to 75% step load external load capacitance cext 0 10,000 f vin = 18 to 36 vdc 2,000 f vin = 36 to 75 vdc
sxa10 series | 1 0w dc/dc cxa20 series | 20 w dc/dc isolated dc/dc converters 10 input characteristics cxa20-48s12 model electrical characteristics - o/p cxa20-48s12 model characteristic symbol min typ max units notes and conditions input current - operating iin 0.50 0.52 adc vin = vin (nom); iout = iout (max); vo = vo (nom) input current - maximum iin (max) 1.30 1.40 adc vin = vin (min); iout = iout (max); vo = nom reflected ripple current iin (ripple) 3 10 ma rms iout = iout (max), measured with no external bypass capacitor reflected ripple current iin (ripple) 20 40 ma pk-pk iout = iout (max), measured with no external bypass capacitor input capacitance - internal cinput 1.5 f internal to converter (ceramic) filter (all models) characteristic symbol min typ max units notes and conditions nominal set-point voltage vout (nom.) 11.82 12.0 12.18 vdc vin = vin (nom); iout = iout (nom); t = 25?c total regulation band vout 11.52 - 12.48 vdc for all line, static load and temperature until end of life line regulation - 0.10 0.20 % iout = iout (nom) vin (min) - vin (max) load regulation - 0.10 0.20 % vin = vin (nom) iout (min) - iout (max) temperature regulation - - 0.02 %/?c vin = vin (nom), iout = iout (nom) output current continuous iout 0.00 1.66 adc output current - short circuit isc 2.00 2.50 a rms continuous, unit auto recovers from short, load resistance <20 m output voltage - noise vp-p 60 100 mv pk-pk measurement bandwidth 20 mhz vrms 11 20 mv rms measurement bandwidth 20 mhz see application note 107 for measurement set-up details
cxa20 series | 20 w dc/dc 11 www.artesyn.com protection and control features cxa20-48s12 model efficiency cxa20-48s12 model isolated dc/dc converters characteristic symbol min typ max units notes and conditions efficiency h 81.0 83.0 % iout = 100% iout (max), vin = 48 vdc efficiency h 79.0 81.0 % iout = 50% iout (max), vin = 48 vdc electrical characteristics - o/p cxa20-48s12 model characteristic symbol min typ max units notes and conditions load transient response - vdynamic 0.5 2.0 % peak deviation for 50% to 75% peak deviation step load, di/dt = 100 ma/sec load transient response - trecovery 100 300 sec settling time to within 1% of recovery output set point voltage for 50% to 75% step load external load capacitance cext 0 1,000 f vin = 18 to 36 vdc 220 f vin = 36 to 75 vdc characteristic symbol min typ max units notes and conditions overvoltage clamp voltage vov 14.25 15.75 vdc non-latching refer to application note 107 overcurrent limit inception ioc 2.7 3.20 adc vout = 90% of vout (nom) output voltage trim range 10 11 13 % cannot trim up for vin <20 v 10 11 13 % trim down open sense voltage na na na vdc no sense pins on this device
sxa10 series | 1 0w dc/dc cxa20 series | 20 w dc/dc isolated dc/dc converters 12 input characteristics cxa20-48d05 model electrical characteristics - o/p cxa20-48d05 model characteristic symbol min typ max units notes and conditions input current - operating iin 0.50 0.51 adc vin = vin (nom); iout = iout (max); vo = vo (nom) input current - maximum iin (max) 1.30 1.40 adc vin = vin (min); iout = iout (max); vo = nom reflected ripple current iin (ripple) 3 10 ma rms iout = iout (max), measured with no external bypass capacitor reflected ripple current iin (ripple) 20 40 ma pk-pk iout = iout (max), measured with no external bypass capacitor input capacitance - internal cinput 1.5 f internal to converter (ceramic) filter (all models) characteristic symbol min typ max units notes and conditions nominal set-point voltage vout (1) 4.925 5.00 5.075 vdc vin = vin (nom); iout = iout (nom); t = 25?c vout (2) 4.925 5.00 5.075 vdc vin = vin (nom); iout = iout (nom); t = 25?c total regulation band vout (1) 4.80 - 5.20 vdc for all line, static load and vout (2) 4.75 - 5.25 vdc temperature until end of life. does not include cross regulation line regulation vout (1) - 0.10 0.20 % iout = iout (nom); vin (min) - vin (max); positive output vout (2) - 0.10 0.50 % iout = iout (nom); vin (min) - vin (max); negative output load regulation vout (1) - 0.10 0.20 % vin = vin (nom), positive output, iout (1) = iout (2) = 0% to 100% vout (2) - 0.10 0.50 % vin = vin (nom), negative output, iout (1) = iout (2) = 10% to 100% cross regulation vout (1) - 0.10 0.20 % iout (1) = 100%, iout (2) = 10% to 100% or iout (2) = 100%, iout (1) = 10% to 100% vout (2) - 7.00 10.00 % vin = vin (nom) temperature regulation 0.02 %/?c vin = vin (nom), iout = iout (nom) output current continuous iout 0 2.00 adc each output (see note 7)
cxa20 series | 20 w dc/dc 13 www.artesyn.com isolated dc/dc converters protection and control features cxa20-48d05 model efficiency cxa20-48d05 model characteristic symbol min typ max units notes and conditions overvoltage clamp voltage vov 6.67 7.67 vdc non-latching, see note 6 refer to application note 107 overcurrent limit inception ioc 2.9 3.50 adc vout = 90% of vout (nom), iout (1) = iout (2) output voltage trim range 10.0 11 13.0 % trim up 10.0 11 13.0 % trim down open sense voltage na na na vdc no sense pins on this device characteristic symbol min typ max units notes and conditions efficiency h 82 84 % iout = 100% iout (max), vin = 48 vdc efficiency h 80 82 % iout = 50% iout (max), vin = 48 vdc electrical characteristics - o/p cxa20-48d05 model characteristic symbol min typ max units notes and conditions output current - short circuit isc 2.50 a rms continuous, unit auto recovers from short load resistance <20 m between vout1 (+) and vout2 (-) output voltage - noise vp-p 55 75 mv pk-pk measurement bandwidth: 20 mhz vrms 9 20 mv rms measurement bandwidth 20 mhz see application note 107 for measurement set-up details load transient response - vdynamic 0.5 2.0 % peak deviation for 50% to 75% peak deviation step load, di/dt = 100 ma/sec load transient response - trecovery 100 300 sec settling time to within 1% of recovery output set point voltage for 50% to 75% step load external load capacitance cext 0 5,000 f vin = 18 to 36 vdc 1,000 f vin = 36 to 75 vdc
sxa10 series | 1 0w dc/dc cxa20 series | 20 w dc/dc isolated dc/dc converters 14 input characteristics cxa20-48d12 model electrical characteristics - o/p cxa20-48d12 model characteristic symbol min typ max units notes and conditions input current - operating iin 0.50 0.51 adc vin = vin (nom); iout = iout (max); vo = vo (nom) input current - maximum iin (max) 1.32 1.40 adc vin = vin (min); iout = iout (max); vo = nom reflected ripple current iin (ripple) 3 10 ma rms iout = iout (max), measured with no external bypass capacitor reflected ripple current iin (ripple) 20 40 ma pk-pk iout = iout (max), measured with no external bypass capacitor input capacitance - internal cinput 1.5 f internal to converter filter (all models) (ceramic) characteristic symbol min typ max units notes and conditions nominal set-point voltage vout (1) 11.82 12.0 12.18 vdc vin = vin (nom); iout = iout (nom); t = 25?c vout (2) 11.82 12.0 12.18 vdc vin = vin (nom); iout = iout (nom); t = 25?c total regulation band vout 11.52 - 12.48 vdc for all line, static load and temperature until end of life does not include cross regulation line regulation vout (1) - 0.10 0.20 % iout = iout (nom); vin (min) - vin (max); positive output vout (2) - 0.10 0.50 % iout = iout (nom); vin (min) - vin (max); negative output load regulation vout (1) - 0.10 0.20 % vin = vin (nom), positive output, iout (1) = iout (2) = 0% to 100% vout (2) - 0.10 0.50 % vin = vin (nom), negative output, iout (1) = iout (2) = 10% to 100% cross regulation vout (1) - 0.10 0.20 % iout (1) = 100%, iout (2) = 10% to 100% or iout (2) = 100%, iout (1) = 10% to 100% vout (2) - 7.00 10.0 % vin = vin (nom) temperature regulation 0.02 %/?c vin = vin (nom), iout = iout (nom) output current continuous iout 0 0.83 adc each output (see note 7)
cxa20 series | 20 w dc/dc 15 www.artesyn.com isolated dc/dc converters protection and control features cxa20-48d12 model efficiency cxa20-48d12 model characteristic symbol min typ max units notes and conditions efficiency h 82 84 % iout = 100% iout (max), vin = 48 vdc efficiency h 80 82 % iout = 50% iout (max), vin = 48 vdc electrical characteristics - o/p cxa20-48d12 model characteristic symbol min typ max units notes and conditions overvoltage clamp voltage vov 14.25 15.75 vdc non-latching, see note 6 see application note overcurrent limit inception ioc 1.4 1.60 adc vout = 90% of vout (nom), iout (1) = iout (2) output voltage trim range 10.0 11 13.0 % trim up, cannot trim up for vin <20v 10.0 11 13.0 % trim down open sense voltage na na na vdc no sense pins on this device characteristic symbol min typ max units notes and conditions output current - short circuit isc 1.40 a rms continuous, unit auto recovers from short load resistance <20 m between vout1 (+) and vout2 (-) output voltage - noise vp-p 65 100 mv pk-pk measurement bandwidth: 20 mhz vrms 12 20 mv rms measurement bandwidth 20 mhz see application note 107 for measurement set-up details load transient response - vdynamic 0.5 2.0 % peak deviation for 50% to 75% peak deviation step load, di/dt = 100 ma/sec load transient response - trecovery 100 300 sec settling time to within 1% of recovery output set point voltage for 50% to 75% step load external load capacitance cext 0 500 f vin = 18 to 36 vdc 100 f vin = 36 to 75 vdc
sxa10 series | 1 0w dc/dc cxa20 series | 20 w dc/dc isolated dc/dc converters 16 figure 1.1: derating curve output current vs temperature s3v3 natural convection (<0.1m/s airflow) figure 1.2: derating curve output current vs temperature s05 natural convection (<0.1m/s airflow) figure 1.3: derating curve output current vs temperature s12 natural convection (<0.1m/s airflow) figure 1.4: derating curve output current vs temperature d05 natural convection (<0.1m/s airflow) figure 1.5: derating curve output current vs temperature d12 natural convection (<0.1m/s airflow) -40?c 0% 20% 40% 60% 80% 100% ambient temperature (?c) rated output current (%) -20?c 0?c 20?c 40?c 60?c 80?c 100?c 75% -40?c 0% 20% 40% 60% 80% 100% ambient temperature (?c) rated output current (%) -20?c 0?c 20?c 40?c 60?c 80?c 100?c vin < 60 vin > 60 50% -40?c 0% 20% 40% 60% 80% 100% ambient temperature (?c) rated output current (%) -20?c 0?c 20?c 36 < vin < 60 40?c 60?c 80?c 100?c 60? vin < 36 vin > 60 -40?c 0% 20% 40% 60% 80% 100% ambient temperature (?c) rated output current (%) -20?c 0?c 20?c vin > 60 40?c 60?c 80?c 100?c vin < 60 50% -40?c 0% 20% 40% 60% 80% 100% ambient temperature (?c) rated output current (%) -20?c 0?c 20?c vin > 60 40?c 60?c 80?c 100?c vin < 60 50%
cxa20 series | 20 w dc/dc isolated dc/dc converters 17 www.artesyn.com figure 6.1: typical transient response of s3v3 ch1 vo, 20mv ac /div. ch2 io, 2a/div figure 6.2: typical transient response of s05 ch1 vo, 20mv ac /div. ch2 io, 1a/div figure 4: typical power-up characteristic s05 (ch1 : input v, ch2 : vo), vin = 48v, load = 4a, 2000f figure 5: control on/off characteristic s05 (ch1 : control, ch2 : vo), vin = 48v, load = 4a, 2000f figure 2: typical efficiency vs vin figure 3: typical efficiency vs ambient temperature 79% 80% 81% 82% 83% 84% 85% -50?c efficiency vs temperature efficiency 0?c 50?c 100?c s3v3 so5 s12 d05 d12 -25?c 25?c 75?c 78% 80% 82% 84% 86% 18v 28v 38v 48v 58v 68v s3v3 s05 s12 d05 d12 efficiency vs vin efficiency
sxa10 series | 1 0w dc/dc cxa20 series | 20 w dc/dc isolated dc/dc converters 18 figure 7.2: typical ripple and noise s05 on test card at nominal conditions figure 6.3: typical transient response of s12 ch1 vo, 50mv ac /div. ch2 io, 0.5a/div figure 6.5: typical transient response of d12 ch1 vo2, 50mv ac /div. r1 vo1 50mv ac /div. ch2 io, 0.5a/div figure 6.4: typical transient response of d05 ch1 vo2, 50mv ac /div. r1 vo1 50mv ac /div. ch2 io, 1a/div figure 7.1: typical ripple and noise s3v3 on test card at nominal conditions figure 7.3: typical ripple and noise s12 on test card at nominal conditions
cxa20 series | 20 w dc/dc isolated dc/dc converters 19 www.artesyn.com figure 7.4: typical ripple and noise d05 on test card at nominal conditions figure 7.5: typical ripple and noise d12 on test card at nominal conditions nc nc s1 f2 f1 s2 l100 q102 nc f3 s3 s2 f2 s1 f1 l100 figure 8.1: hot spot locations on s3v3, s05 and s12 models figure 8.2: hot spot location on d05 and d12 models
cxa20 series | 20 w dc/dc isolated dc/dc converters 20 figure 9: dimensions and pinout stand-offs 4 places 0.040 0.004 (1.02 0.1) 2.00 0.02 (50.80 0.5) 1.80 (45.72) 1 all dimensions in inches (mm) general tolerance 0.010 ( 0.25) unless otherwise specified 2 4 5 6 7 8 0.02 0.004 (0.50 0.1) 1.60 0.02 (40.64 0.5) 0.70 (17.78) 0.20 (5.08) 2.54 (0.10) 0.30 (7.62) 0.70 (17.78) 0.50 (12.70) 0.60 (15.24) 0.14 0.02 (3.60 0.5) 0.413 (10.50) max. open frame height bottom view pin connections pin number single output dual output 1 vin+ vin+ 2 vin- vin- 3 no pin no pin 4 remote on/off remote on/off 5 no pin vo+ 6 vo+ common 7 vo- vo- 8 trim trim
note 1 hot spot temperature is defined as the highest temperature measured at any one of the specified temperature hotspot checkpoints. see figure 8: hotspot temperature check points. note 2 the control pin is referenced to vin-. note 3 the cxa20 is supplied as standard with active high logic. control input pulled low: unit disabled. control input floating: unit enabled. the unit can be supplied with active low logic. note 4 parallel operation of multiple units is not recommended. if parallel operation is required outputs should be decoupled by diodes. control inputs of multiple units should not be connected but decoupled by diodes or transistors. note 5 thermal reference set up: unit mounted centrally on a 200mm x 240 mm testboard. testboard is mounted vertically in a fully enclosed 300mm x 300mm x 300mm testbox. ambient temperature measured at the bottom of the textbox. altitude sea level. note 6 on the dual output models ovp protection is on positive outputs only. see application note for details. note 7 for balanced loads. in the case of unbalanced loads a minimum load of 10% is required on each output to maintain cross regulation. caution: hazardous internal voltages and high temperatures. ensure that unit is accessible only to trained personnel. the user must provide the recommended fusing in order to comply with safety approvals. 21 www.artesyn.com cxa20 series | 20 w dc/dc isolated dc/dc converters
ds_cxa20_20000119.pdf data sheet ? artesyn technologies? 2000 the information and specifications contained in this data sheet are believed to be correct at time of publication. however, artesyn technologies accepts no responsibility for consequences arising from printing errors or inaccuracies. specifications are subject to change without notice. no rights under any patent accompany the sale of any such product(s) or information contained herein. cxa20 series | 20 w dc/dc isolated dc/dc converters north america e-mail: sales.us@artesyn.com % 800 769 7274 % +508 628 5600 european locations e-mail: sales.europe@artesyn.com ireland % +353 24 93130 austria % +43 1 80150 far east locations e-mail: sales.asia@artesyn.com hong kong % +852 2699 2868 22 www.artesyn.com

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