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ge data sheet august 14, 2013 ?2012 general electric company. all rights reserved. page 1 JNCW016A0R orca * series; dc-dc converter power modules 36?75 vdc input; 28vdc output; 16adc output features ? compliant to rohs ii eu directive 2011/65/ec (-z versions) ? compliant to reach directive (ec) no 1907/2006 ? high power density: 166 w/in 3 ? very high efficiency: >93.5% typ at full load ? industry standard half-brick pin-out ? low output ripple and noise ? industry standard, dosa compliant half-brick footprint 57.7mm x 60.7mm x 12.7mm (2.27? x 2.39? x 0.5?) ? remote sense ? supports repetitive loads (ac+dc) up to 2 khz ? 2:1 input voltage range ? single tightly regulated output ? constant switching frequency ? constant current overcurrent limit ? latch after short circuit fault shutdown ? over temperature protection auto restart ? output voltage adjustment trim, 16.0v dc to 35.2v dc ? wide operating case temperature range (-40c to 100c) ? ce mark meets 2006/95/ec directives ? ansi/ul # 60950-1, 2nd ed. recognized, csa ? c22.2 no. 60950- 1-07 certified, and vde ? 0805-1 (en60950-1, 2nd ed.) licensed ? iso ** 9001 and iso 14001 certified manufacturing facilities ? compliant to ipc-9592a, category 2, class ii applications ? rf power amplifier ? wireless networks ? switching networks options ? output ocp/ovp auto restart ? shorter pins ? unthreaded heatsink holes ? tunable loop* for transient response optimization description the JNCW016A0R orca series of dc-dc converters are a new generation of isolated, very high efficiency dc/dc power modules providing up to up to 16adc output current at a nominal output voltage of 28vdc in an industry standard, dosa compliant half- brick size footprint, which makes it an ideal choice for high voltage and high power applications. threaded-through holes are provided to allow easy mounting or addition of a heatsink for high-temperature applications. the output is fully isolated from the input, allowing versatile polarity configurations and grounding connections. this module contains an optional new capability, t he tunable loop, that allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance, leading to savings on cost and pwb area. * trademark of general electric company # ul is a registered trademark of underwriters laboratories, inc. ? csa is a registered trademark of canadian standards association. ? vde is a trademark of verband deutscher elektrotechniker e.v. ** iso is a registered trademark of th e international organization of standards rohs compliant
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 2 absolute maximum ratings stresses in excess of the absolute maximum ratings can cause permanent damage to the device. these are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operat ions sections of the data sheet. exposure to absolute maximum ratings for extended periods can adversely affect the device reliabili ty. parameter device symbol min max unit input voltage continuous all v in -0.3 80 v dc transient, operational ( 100 ms) all v in,trans -0.3 100 v dc operating ambient temperature all ta -40 85 c operating case temperature (see thermal considerations section, figure 17) all tc -40 100 c storage temperature all t stg -55 125 c i/o isolation voltage: input to case, input to output all ? ? 1500 v dc output to case all ? ? 500 v dc electrical specifications unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. parameter device symbol min typ max unit operating input voltage (see figure 12 for v in min when using trim-up feature) all v in 36 48 75 v dc maximum input current (v in =36v to 75v, i o =i o, max ) all i in,max 14.0 a dc inrush transient all i 2 t 2 a 2 s input reflected ripple current, peak-to-peak (5hz to 20mhz, 12 h source impedance; v in =0v to 75v, i o = i omax ; see figure 7) all 20 ma p-p input ripple rejection (120hz) all 50 db caution: this power module is not internally fu sed. an input line fuse must always be used. this power module can be used in a wide variety of applications, ranging from simple standalone operation to being an integrate d part of complex power architecture. to preserve maximum flexibility, internal fusing is not included. always use an input line fuse, to achieve maximum safety and system protection. the safety agencies require a time-delay or fast-acting fuse with a maximum rating of 25 a in the ungrounded input connection (see safety considerations section). based on the information provided in thi s data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. refer to the fuse manufacturer?s data sheet for further information.
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 3 electrical specifications (continued) parameter device symbol min typ max unit output voltage set-point (v in =v in,nom , i o =i o, max , t c =25c) all v o, set 27.5 28 28.5 v dc output voltage set-point total tolerance (over all operating input voltage, resistive load, and temperature conditions until end of life) all v o 27.0 ? 29.0 v dc output regulation line (v in =v in, min to v in, max ) all ? 0.1 0.2 %v o,set load (i o =i o, min to i o, max ) all ? 0.1 0.2 %v o,set temperature (t c = -40oc to +100oc) all ? ? 0.02 %/c output ripple and noise on nominal output (v in =v in, nom and i o =i o, min to i o, max ) rms (5hz to 20mhz bandwidth) all ? 45 55 mv rms peak-to-peak (5hz to 20mhz bandwidth) all ? 80 200 mv pk-pk external capacitance all, except -t c o 440 6500 f without the tunable loop 1 -t c o, 440 470 f with the tunable loop 2 -t c o 440 10,000 f output power (v o =28v to 35.2v) all p o,max ? ? 450 w output current all i o 0 16.0 a dc output current limit inception (constant current until v o < v trimmin , duration <4s) all i o, lim 17.5 ? 21.0 a dc output short circuit current (v o 0.25v dc ) all i o, sc 60 a pk hiccup mode 5 a rms efficiency v in =v in, nom , t c =25c i o =i o, max , v o = v o,set all 93.0 93.5 ? % switching frequency f sw ? 175 ? khz dynamic load response ( ? io/ ? t=1a/10 ? s; v in =v in ,nom; t c =25c; tested with a 470 f aluminum and a 10 f cerami c capacitor acro ss the load.) load change from io= 50% to 75% of io,max: peak deviation settling time (vo<10% peak deviation) all v pk t s ? ? 1 1.0 ? ? %v o, set ms load change from io= 25% to 50% of io,max: peak deviation settling time (vo<10% peak deviation) v pk t s ? ? 1 1.0 ? ? %v o, set ms ( ? io/ ? t=2a/10 ? s; v in =v in ,nom; t c =25c; tested with a 880 f aluminum and a 10 f cerami c capacitor across the load.) load change from io= 0% to 75% of io,max: peak deviation settling time (vo<10% peak deviation) all v pk t s ? ? 2 1.0 ? ? %v o, set ms load change from io= 75% to 0% of io,max: peak deviation settling time (vo<10% peak deviation) v pk t s ? ? 2 1.0 ? ? %v o, set ms 1 use a minimum 2 x 220uf output capacitor. recommended capacitor is nichicon pm series, 220uf/35v. if the ambient temperature at module startup is between 0 o c and -10 o c, use a minimum 3 x 220uf capacitors, and between -10 o c and -20 o c, use a minimum 4 x 220uf capacitors. for startup below -20 o c, use 440uf minimum polymer capacitors. 2 external capacitors may require using the new tunable loop feature to ensure that the m odule is stable as well as getting the best transient response. see the tunable loop section for details. isolation specifications parameter symbol min typ max unit isolation capacitance c iso ? 15 ? nf isolation resistance r iso 10 ? ? m ?
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 4 general specifications parameter device symbol min typ max unit calculated reliability based upon telcordia sr-332 issue 3: method i case 3 (i o =80%i o, max , t a =40c, airflow = 200 lfm, 90% confidence) all fit 214.5 10 9 /hours mtbf 4,661,316 hours weight all ? 76.4 ? g 2.69 oz. feature specifications unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. see feature descriptions for additional information. parameter device symbol min typ max unit remote on/off signal interface (v in =v in, min to v in, max ; open collector or equivalent, signal referenced to v in- terminal) negative logic: device code suffix ?1? logic low = module on, logic high = module off positive logic: no device code suffix required logic low = module off, logic high = module on logic low - remote on/off current all i on/off ? 1.0 ma logic low - on/off voltage all v on/off 0 ? 1.2 v dc logic high voltage ? (typ = open collector) all v on/off ? 5 v dc logic high maximum allowable leakage current all i on/off ? ? 50 a turn-on delay and rise times (vin=v in,nom , i o =i o, max , 25c) case 1: t delay = time until v o = 10% of v o,set from application of v in with remote on/off set to on, all t delay 120 ms case 2: t delay = time until v o = 10% of v o,set from application of remote on/off from off to on with v in already applied for at least one second. all t delay ? 20 ms t rise = time for v o to rise from 10% of v o,set to 90% of v o,set . all t rise ? 30 ? ms output voltage overshoot 3 % v o, set (i o =80% of i o, max , t a =25c) output voltage adjustment (see feature descriptions): output voltage remote-sense range (onl y for no trim or trim down a pp lication ) all v sense __ __ 2 %v o,nom output voltage set-point adjustment range (trim) all v trim 16.0 --- 35.2 v dc output overvoltage protection all v o, limit 37 ? 39 v dc over temperature protection all t ref ? 110 ? c (see feature descri p tions, fi g ure 17) input under voltage lockout v in, uvlo turn-on threshold all 35 36 v dc turn-off threshold all 31 32 v dc hysteresis all 3 v dc input over voltage lockout v in, ovlo turn-on threshold all ? 79.5 81 v dc turn-off threshold all 81 83 ? v dc hysteresis all --- 3 --- v dc
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 5 characteristic curves the following figures provide typical characteristics for the JNCW016A0R (28v, 16a) at 25oc. the figures are identical for eith er positive or negative remote on/off logic. efficiency (%) o n /off v o lta g e o utputv o lta g e v on/off (v) (5v/div) v o (v) (10v/div) output current, i o (a) time, t (20ms/div) figure 1. converter efficiency versus output current. figure 4. typical start-up using negative remote on/off; c o,ext = 440f. output voltage v o (v) (50mv/div) input v o lta g e o utput v o lta g e v in (v) (20v/div) v o (v) (10v/div) time, t (1 ? s/div) time, t (40ms/div) figure 2. typical output ripple and noise at room temperature and 48vin; i o = i o,max ; c o,ext = 440f. figure 5. typical start-up from v in , on/off enabled prior to v in step; c o,ext = 470f. output current output voltage i o (a) (5a/div) v o (v) (200mv/div) output current output voltage i o (a) (5a/div) v o (v) (500mv/div) time, t (1ms/div) time, t (2ms/div) figure 3. dynamic load change transient response from 50% to 75% to 50% of full load at room temperature and 48 vin; 0.1a/us, c o,ext = 470f. figure 6. dynamic load change transient response from 0 % to 75% to 0% of full load at room temperature and 48 vin; 2.0a/us, c o,ext = 880f.
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 6 test configurations note: measure the input reflected- ripple current with a simulated source inductance (ltest) of 12 h. capacitor cs offsets possible battery impedance. measure the current, as shown above. figure 7. input reflected ripple current test setup. note: use a cout (470 f low esr aluminum or tantalum capacitor typical), a 0.1 f ceramic capacitor and a 10 f ceramic capacitor, and scope measurement should be made using a bnc socket. position the load between 51 mm and 76 mm (2 in. and 3 in.) from the module. figure 8. output ripple and noise test setup. note: all measurements are taken at the module terminals. when socketing, place kelvin connections at module terminals to avoid measurement errors due to socket contact resistance. figure 9. output voltage and efficiency test setup. design considerations input source impedance the power module should be connected to a low ac-impedance source. a highly inductive source impedance can affect the stability of the power module. for the test configuration in figure 7, a 470 f low esr aluminum capacitor, c in , mounted close to the power module helps ensure the stability of the unit. consult the factory for further application guidelines. output capacitance the JNCW016A0R power module requires a minimum output capacitance of 440f low esr capacitor, c out to ensure stable operation over the full range of load and line conditions, see figure 8. if the ambient temperature at module startup is between 0 o c and -10 o c, it is required to use at least 660uf aluminum or 440uf polymer capacitors; and if the ambient temperature at module startup is between -10 o c and -20 o c, it is required to use at least 880uf aluminum or 440uf polymer capacitors. if the ambient temperature at module startup is below -20 o c, it is required to use only 440uf polymer capacitors. use of polymer capacitors can be avoided by suitable warmup time, when starting from -40 o c. in general, the process of determining the acceptable values of output capacitance and esr is complex and is load-dependent. safety considerations for safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., ul 60950-1, 2nd ed., csa no. 60950-1 2 nd ed., and vde0805-1 en60950-1, 2nd ed. for end products connected to ?48v dc, or ?60vdc nominal dc mains (i.e. central office dc battery plant), no further fault testing is required. *note: -60v dc nominal battery plants are not available in the u.s. or canada. for all input voltages, other than dc mains, where the input voltage is less than 60v dc, if the input meets all of the requirements for selv, then: ? the output may be considered selv. output voltages will remain within selv limits even with internally- generated non-selv voltages. single component failure and fault tests were performed in the power converters. ? one pole of the input and one pole of the output are to be grounded, or both circuits are to be kept floating, to maintain the output voltage to ground voltage within elv or selv limits. however, selv will not be maintained if v i (+) and v o (+) are grounded simultaneously.
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 7 safety considerations (continued) for all input sources, other than dc mains, where the input voltage is between 60 and 75v dc (classified as tnv-2 in europe), the following must be meet, if the converter?s output is to be evaluated for selv: ? the input source is to be provided with reinforced insulation from any hazardous voltage, including the ac mains. ? one vi pin and one vo pin are to be reliably earthed, or both the input and output pins are to be kept floating. ? another selv reliability test is conducted on the whole system, as required by the safety agencies, on the combination of supply source and the subject module to verify that under a single fault, hazardous voltages do not appear at the module?s output. all flammable materials used in the manufacturing of these modules are rated 94v-0, or tested to the ul60950 a.2 for reduced thickness. the input to these units is to be provided with a maximum 25 a fast-acting or time-delay fuse in the ungrounded input connection. feature description remote on/off two remote on/off options are available. positive logic turns the module on during a logic high voltage on the on/off pin, and off during a logic low. negative logic remote on/off, device code suffix ?1?, turns the module off during a logic high and on during a logic low. to turn the power module on and off, the user must supply a switch (open collector or equivalent) to control the voltage (v on/off ) between the on/off terminal and the v in (-) terminal (see figure 10). logic low is 0v v on/off 1.2v. the maximum i on/off during a logic low is 1ma, the switch should be maintain a logic low level whilst sinking this current. during a logic high, the typical maximum v on/off generated by the module is 5v, and the maximum allowable leakage current at v on/off = 5v is 50 a. if not using the remote on/off feature: for positive logic, leave the on/off pin open. for negative logic, short the on/off pin to v in (-). figure 10. circuit configuration for using remote on/off implementation. overcurrent protection to provide protection in a fault output overload condition, the module is equipped with internal current limiting protection circuitry, and can endure continuous overcurrent by providing constant current output, for up to 4 seconds, as long as the output voltage is greater than v trimmin . if the load resistance is to low to support v trimmin in an overcurrent condition or a short circuit load condition exists, the module will shutdown immediately. a latching shutdown option is standard. following shutdown, the module will remain off until the module is reset by either cycling the input power or by toggling the on/off pin for one second. an auto-restart option (4) is also available in a case where an auto recovery is required. if overcurrent greater than 19a persists for few milli-seconds, the module will shut down and auto restart until the fault condition is corrected. if the output overload condition still exists when the module restarts, it will shut down again. this operation will continue indefinitely, until the overcurrent condition is corrected. over voltage protection the output overvoltage protection consists of circuitry that monitors the voltage on the output terminals. if the voltage on the output terminals exceeds the over voltage protection threshold, then the module will shutdown and latch off. the overvoltage latch is reset by either cycling the input power for one second or by toggling the on/off signal for one second. the protection mechanism is such that the unit can continue in this condition until the fault is cleared. an auto-restart option (4) is also available in a case where an auto recovery is required. remote sense remote sense minimizes the effects of distribution losses by regulating the voltage at the remote-sense connections (see figure 11). for no trim or trim down application, the voltage between the remote-sense pins and the output terminals must not exceed the output voltage sense range given in the feature specifications table i.e.: [v o (+)?v o (-)] ? [sense(+) ? sense(-)] ? 2% of v o,nom
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 8 feature description (continued) the voltage between the vo(+) and vo(-) terminals must not exceed the minimum output overvoltage shut-down value indicated in the feature specifications table. this limit includes any increase in voltage due to remote-sense compensation and output voltage set-point adjustment (trim). see figure 11. if not using the remote-sense feature to regulate the output at the point of load, then connect sense(+) to v o (+) and sense(-) to v o (-) at the module. although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. the maximum increase is the larger of either the remote sense or the trim. the amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. when using remote sense and trim: the output voltage of the module can be increased, which at the same output current would increase the power output of the module. care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power. figure 11. effective circuit configuration for single- module remote-sense operation output voltage. output voltage programming trimming allows the user to increase or decrease the output voltage set point of a module. trimming down is accomplished by connecting an external resistor between the trim pin and the sense(-) pin. trimming up is accomplished by connecting external resistor between the sense(+) pin and trim pin. the trim resistor should be positioned close to the module. certain restrictions apply to the input voltage lower limit when trimming the output voltage to the maximum. figure 12. output voltage trim limits vs. input voltage. see figure 12 for the allowed input to output range when using trim. if not using the trim down feature, leave the trim pin open. trim down ? decrease output voltage with an external resistor (r adj_down ) between the trim and sense(-) pins, the output voltage set point (v o,adj ) decreases (see figure 13). the following equation determines the required external-resistor value to obtain a percentage output voltage change of ? %. for output voltages: v o,nom = 28v without ?t option with ?t option ? ? ? ? ? ? ? ? ? ? k r down adj 2 % 100 _ ? ? ? ? ? ? ? ? ? ? k r down adj 11 % 1000 _ where, 100 % , , ? ? ? ? nom o desired nom o v v v v desired = desired output voltage set point (v). figure 13. circuit configuration to decrease output voltage. trim up ? increase output voltage with an external resistor ( r adj_up ) connected between the sense(+) and trim pins , the output voltage set point ( v o, ad j ) increases (see figure 14). the following equation determines the required external- resistor value to obtain a percentage output voltage change of ? %. for output voltages: v o,nom = 28v the voltage between the vo(+) and vo(-) terminals must not exceed the minimum output overvoltage shut-down value indicated in the feature specifications table. 15 20 25 30 35 35 40 45 50 55 60 65 70 75 vin (v) vout (v) upper trim limit lower trim limit without ?t option ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? k v r nom o up adj % %) 2 ( 100 ( % 225 . 1 %) 100 ( , _ with ?t option ? ? ? ? ? ? ? ? ? ? k r up adj 12 . 15 % 27122 _ where, 100 % , , ? ? ? ? nom o nom o desired v v v v desired = desired output voltage set point (v).
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 9 feature description (continued) figure 14. circuit configuration to increase output voltage. this limit includes any increase in voltage due to remote- sense compensation and output voltage set-point adjustment (trim). see figure 11. although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. the maximum increase is the larger of either the remote sense or the trim. the amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. when using remote sense and trim, the output voltage of the module can be increased, which the same output current would increase the power output of the module. care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power. examples: to trim down the output of a nominal 28v module, without ? t option, to 16.8v % 40 100 28 8 . 16 28 % ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? k r down adj 5 . 0 2 40 100 _ to trim up the output of a nominal 28v module, without ?t option, to 30.8v % 0 . 10 100 28 28 8 . 30 % ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 10 ) 10 2 ( 100 ( 10 225 . 1 ) 10 100 ( 28 _ up adj r r adj_up = 239k ? active voltage programming for both the JNCW016A0Rx and JNCW016A0Rx-t, a digital- analog converter (dac), capable of both sourcing and sinking current, can be used to actively set the output voltage, as shown in figure 15. the value of r g will be dependent on the voltage step and range of the dac and the desired values for trim-up and trim-down ? %. please contact your ge technical representative to obtain more details on the selection for this resistor. figure 15. circuit configuration to actively adjust the output voltage. ac+dc load capability the jrcw016a0rx is compatible with load profiles as shown in figure 16. figure 16. ac-dc load profile the output voltage peak deviation shall not exceed the peak values listed in the electrical specifications table. tunable loop the JNCW016A0Rx-t modules have a new feature that optimizes transient response of the module called tunable loop. external capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes.
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 10 feature description (continued) adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. larger values of external capacitance could also cause the module to become unstable. the tunable loop allows the user to externally adjust the voltage control loop to match the filter network connected to the output of the module. the tunable loop is implemented by connecting a series r-c between the sense(+) and trim pins of the module, as shown in fig. 17. this r-c allows the user to externally adjust the voltage loop feedback compensation of the module. figure 17. circuit diagram showing connection of r tune and c tune to tune the control loop of the module. table 1 shows the recommended values of r tune and c tune for different values of ceramic output capacitors up to 8000uf that might be needed for an application to meet output ripple and noise requirements. table 1. general recommended values of of r tune and c tune for v out =28v and various external ceramic capacitor combinations. c out (f) 1100 2200 4400 6600 8800 esr (m ? ) 60 30 15 10 7.5 r tune * * * * * c tune * * * * * * contact ge technical support please contact your ge technical representative to obtain more details of this feature as well as for guidelines on how to select the right value of external r-c to tune the module for best transient performance and stable operation for other output capacitance values. over temperature protection the JNCW016A0R module provides a non-latching over temperature protection. a temperature sensor monitors the operating temperature of the converter. if the reference temperature, t ref 1 , (see figure 17) exceeds a threshold of 115 oc (typical), the converter will shut down and disable the output. when the base plate temperature has decreased by approximately 20 oc the converter will automatically restart. the module can be restarted by cycling the dc input power for at least one second or by toggling the remote on/off signal for at least one second. thermal considerations the power modules operate in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable operation of the unit. heat- dissipating components inside the unit are thermally coupled to the case. heat is removed by conduction, convection, and radiation to the surrounding environment. proper cooling can be verified by measuring the case temperature. peak temperature (tref) occurs at the position indicated in figure 18. considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. a reduction in the operating temperature of the module will result in an increase in reliability. the thermal data presented here is based on physical measurements taken in a wind tunnel, using automated thermo-couple instrumentation to monitor key component temperatures: fets, diodes, control ics, magnetic cores, ceramic capacitors, opto-isolators, and module pwb conductors, while controlling the ambient airflow rate and temperature. for a given airflow and ambient temperature, the module output power is increased, until one (or more) of the components reaches its maximum derated operating temperature, as defined in ipc-9592. this procedure is then repeated for a different airflow or ambient temperature until a family of module output derating curves is obtained. heat-dissipating components inside the unit are thermally coupled to the case. heat is removed by conduction, convection, and radiation to the surrounding environment. for reliable operation this temperature should not exceed 100oc at either t ref 1 or t ref 2 for applications using forced convection airflow or cold plate applications. the output power of the module should not exceed the rated power for the module as listed in the ordering information table. although the maximum t ref temperature of the power modules is discussed above, you can limit this temperature to a lower value for extremely high reliability.
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 11 thermal considerations (continued) figure 18. case (t ref ) temperature measurement location (top view). thermal derating thermal derating is presented for two different applications: 1) figure 19, the JNCW016A0R module is thermally coupled to a cold plate inside a sealed clamshell chassis, without any internal air circulation; and 2) figure 20 , 21 and 22, the JNCW016A0R module is mounted in a traditional open chassis or cards with forced air flow. in application 1, the module is cooled entirely by conduction of heat from the module primarily through the top surface to a cold plate, with some conduction through the module?s pins to the power layers in the system board. for application 2, the module is cooled by heat removal into a forced airflow that passes through the interior of the module and over the top base plate and/or attached heatsink. output current, i o (a) cold plate (inside surface) temperature (oc) figure 19. output power derating for JNCW016A0R in conduction cooling (cold plate) applications; t a <70oc adjacent to module; v in = v in,nom output current, i o (a) ambient temperature, t a ( o c) figure 20. derating output current vs. local ambient temperature and airflow, no heatsink, vin=48v, airflow from vi(-) to vi(+). output current, i o (a) ambient temperature, t a ( o c) figure 21. derating output current vs. local ambient temperature and airflow, 0.5? heatsink, vin=48v, airflow from vi(-) to vi(+). output current, i o (a) ambient temperature, t a ( o c) figure 22. derating output current vs. local ambient temperature and airflow, 1.0? heatsink, vin=48v, airflow from vi(-) to vi(+).
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 12 layout considerations the JNCW016A0R power module series are constructed using a single pwb with integral base plate; as such, component clearance between the bottom of the power module and the mounting (host) board is limited. avoid placing copper areas on the outer layer directly underneath the power module. post solder cleaning and drying considerations post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. the result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. for guidance on appropriate soldering, cleaning and drying procedures, refer to ge board mounted power modules: soldering and cleaning application note. through-hole lead-free soldering information the rohs-compliant through-hole products use the sac (sn/ag/cu) pb-free solder and rohs-compliant components. they are designed to be processed through single or dual wave soldering machines. the pins have an rohs- compliant finish that is compatible with both pb and pb-free wave soldering processes. a maximum preheat rate of 3 ? c/s is suggested. the wave preheat process should be such that the temperature of the power module board is kept below 210 ? c. for pb solder, the recommended pot temperature is 260 ? c, while the pb-free solder pot is 270 ? c max. the JNCW016A0R cannot be processed with paste- through-hole pb or pb-free reflow process. if additional information is needed, please consult with your ge representative for more details.
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 13 mechanical outline for through-hole module dimensions are in millimeters and [inches]. tolerances: x.x mm ? 0.5 mm [x.xx in. ? 0.02 in.] (unless otherwise indicated) x.xx mm ? 0.25 mm [x.xxx in ? 0.010 in.] top view* side view** bottom view pin description 1 vin (+) 2 on/off 3 baseplate 4 vin (?) 5 vout (?) 6 sense (-) 7 trim 8 sense (+) 9 vout (+) *top side label includes ge name, product designation, and data code.
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output august 14, 2013 ?2012 general electric company. all rights reserved. page 14 recommended pad layout for through hole module dimensions are in millimeters and [inches]. tolerances: x.x mm ? 0.5 mm [x.xx in. ? 0.02 in. ] (unless otherwise indicated) x.xx mm ? 0.25 mm [x.xxx in ? 0.010 in. ]
ge data sheet JNCW016A0R orca series; dc-dc converter power modules 36?75 vdc input; 28.0vdc output; 16adc output contact us for more information, call us at usa/canada: +1 888 546 3243 , or +1 972 244 9288 asia-pacific: +86.021.54279977*808 europe, middle-east and africa: +49.89.878067-280 india: +91.80.28411633 www.ge.com/powerelectronics august 14, 2013 ?2012 general electric co mpany. all rights reserved. version 1.1 ordering information please contact your ge sales representative for pricing, availability and optional features. table 2. device code input voltage output voltage output curren t efficiency connector type product codes comcodes 48v (36-75vdc) 28v 16a 93.5% through hole JNCW016A0R41z 150030776 48v (36-75vdc) 28v 16a 93.5% through hole JNCW016A0R41-18z 150030782 table 3. device options

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