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dcm ? dc-dc converter isolated, regulated dc converter mil-cots mdcm270p280m500a40 features ? isolated, regulated dc-dc converter ? up to 500 w, 17.86 a continuous ? 93.7% peak efficiency ? 1032 w/in 3 power density ? wide input range 160 C 420 vdc ? safety extra low voltage (selv) 28.0 v nominal output ? 4242 vdc isolation ? zvs high frequency switching n enables low-profile, high-density filtering ? optimized for array operation n up to 8 units C 4000 w n no power derating needed n sharing strategy permits dissimilar line voltages across an array ? fully operational current limit ? ov, oc, uv, short circuit and thermal protection ? 4623 through-hole chip package n 1.886 x 0.898 x 0.286 (47.91 mm x 22.8 mm x 7.26 mm) typical applications ? radar, range finding ? guidance systems, computing ? motor drive ? display, gps, radio product description the dcm isolated, regulated dc converter is a dc-dc converter, operating from an unregulated, wide range input to generate an isolated 28.0 vdc output. with its high frequency zero voltage switching (zvs) topology, the dcm converter consistently delivers high e?ciency across the input line range. modular dcm converters and downstream dc-dc products support e?cient power distribution, providing superior power system performance and connectivity from a variety of unregulated power sources to the point-of-load. leveraging the thermal and density bene?ts of vicors chip packaging technology, the dcm module o?ers ?exible thermal management options with very low top and bottom side thermal impedances. thermally-adept chip based power components enable customers to achieve cost e?ective power system solutions with previously unattainable system size, weight and e?ciency attributes, quickly and predictably. product ratings v in = 160 v to 420 v p out = 500 w v out = 28.0 v (16.8 v to 30.8 v trim) i out = 17.86 a dcm? dc-dc converter rev 1.1 vicorpower.com page 1 of 25 07/2015 800 927.9474 c us ? s n rtl cu s
vin load non-isolated point-of-load regulator r1 l1 c1 l2 c load tr en ft +in +out -in out dcm load f1 typical application typical application 2: single mdcm270p280m500a40, to a non-isolated regulator, and direct to load load r1_1 l1_1 c1_1 l2_1 c dcm _1 c load tr en ft +in +out -in -out r1_2 l1_2 c1_2 l2_2 c dcm _2 tr en ft +in +out -in -out r1_4 l1_4 c1_4 l2_4 c dcm _4 tr en ft +in +out -in -out dcm1 dcm2 dcm4 vin f1_1 f1_2 f1_ 4 1+1+1 11 mdcm270p280m500a40 dcm? dc-dc converter rev 1.1 vicorpower.com page 2 of 25 07/2015 800 927.9474 1 2 a b c d e d c b +in +out top view 4623 chip package a ft en +out -out -out -in tr pin con?guration pin descriptions pin number signal name type function a1 +in input power positive input power terminal b1 tr input enables and disables trim functionality. adjusts output voltage when trim active. c1 en input enables and disables power supply d1 ft output fault monitoring e1 -in input power return negative input power terminal a2, c2 +out output power positive output power terminal b2, d2 -out output power return negative output power terminal mdcm270p280m500a40 dcm? dc-dc converter rev 1.1 vicorpower.com page 3 of 25 07/2015 800 927.9474 part ordering information device input voltage range package type output voltage x 10 temperature grade output power revision version mdcm 270 p 280 m 500 a4 0 mdcm = mdcm 270 = 160/270/420 v p = chip th 280 = 28 v m = -55 to 125c 500 = 500 w a4 analog control interface version absolute maximum ratings the absolute maximum ratings below are stress ratings only. operation at or beyond these maximum ratings can cause permanent damage to the device. electrical specifications do not apply when operating beyond rated operating conditions. parameter comments min max unit input voltage (+in to Cin) -0.5 460.0 v input voltage slew rate -1 1 v/s tr to - in -0.3 3.5 v en to -in -0.3 3.5 v ft to -in -0.3 3.5 v 5 ma output voltage (+out to Cout) -0.5 36.5 v dielectric withstand (input to output) reinforced insulation 4242 vdc internal operating temperature m grade -55 125 c storage temperature m grade -65 125 c average output current 24.3 a figure 2 electrical specified operating area figure 1 thermal specified operating area: max output power vs. case temp, single unit at minimum full load efficiency mdcm270p280m500a40 dcm? dc-dc converter rev 1.1 vicorpower.com page 4 of 25 07/2015 800 927.9474 electrical speci?cations specifications apply over all line, trim and load conditions, internal temperature t int = 25oc, unless otherwise noted. boldface specifications apply over the temperature range of -55c < t int < 125c. attribute symbol conditions / notes min typ max unit power input speci?cation input voltage range v in continuous operation 160 270 420 v inrush current (peak) i inrp with maximum c out-ext , full resistive load 8.0 a input capacitance (internal) c in-int effective value at nominal input voltage 0.8 f input capacitance (internal) esr r cin-int at 1 mhz 2.50 m input inductance (external) l in differential mode, with no further line bypassing 5 h no load speci?cation input power C disabled p q nominal line, see fig. 3 1.0 3.0 w worst case line, see fig. 3 3.5 w input power C enabled with no load p nl nominal line, see fig. 4 3.0 5.1 w worst case line, see fig. 4 5.5 w power output speci?cation output voltage set point v out-nom v in = 270 v, nominal trim, at 100% load, t int = 25c 27.86 28.0 28.14 v rated output voltage trim range v out-trimming trim range over temp, with > 10% rated load. speci?es the low, nominal and high trim conditions. 16.8 28.0 30.8 v output voltage load regulation v out-load linear load line. output voltage increase from full rated load current to no load (does not include light load regulation). see fig. 6 and sec. design guidelines 1.3194 1.4736 1.6296 v output voltage light load regulation v out-ll 0% to 10% load, additional v out relative to calculated load-line point; see fig. 6 and sec. design guidelines 0.0 2.95 v output voltage temperature coef?cient v out-temp nominal, linear temperature coef?cient, relative to t int = 25oc. see fig. 5 and design guidelines section -3.73 mv/c v out accuracy %v out-accuracy the total output voltage setpoint accuracy from the calculated ideal v out based on load, temp and trim. excludes v out-ll -2.0 2.0 % rated output power p out continuous, v out 28.0 v 500 w rated output current i out continuous, v out 28.0 v 17.86 a output current limit i out-lm of rated i out max. fully operational current limit, for nominal trim and below 100 120 133 % current limit delay t iout-lim the module will power limit in a fast transient event 1 ms ef?ciency full load, nominal line, nominal trim 93.2 93.7 % full load, over line and temperature, nominal trim 90.7 % 50% load, over rated line, temperature and trim 90.6 % output voltage ripple v out-pp over all operating steady-state line and trim conditions, 20 mhz bw, minimum c out-ext , and at least 10 % rated load 812 mv output capacitance (internal) c out-int effective value at nominal output voltage 33 f output capacitance (internal) esr r cout-int at 1 mhz 0.069 m output capacitance (external) c out-ext 20 mhz bandwidth. at nominal trim, minimum c out-ext and at least > 10% rated load 200 2000 f output capacitance (external) c out-ext-trans excludes component temperature coef?cient for load transients down to 0% rated load, with static trim 200 2000 f output capacitance (external) c out-ext- trans-trim excludes component temperature coef?cient for load transients down to 0% rated load, with dynamic trimming 200 2000 f mdcm270p280m500a40 dcm? dc-dc converter rev 1.1 vicorpower.com page 5 of 25 07/2015 800 927.9474 electrical speci?cations (cont.) specifications apply over all line, trim and load conditions, internal temperature t int = 25oc, unless otherwise noted. boldface specifications apply over the temperature range of -55c < t int < 125c. attribute symbol conditions / notes min typ max unit power output speci?cations (cont.) output capacitance, esr (ext.) r cout-ext at 10 khz, excludes component tolerances 10 m initialization delay t init see state diagram 25 40 ms output turn-on delay t on from rising edge en, with v in pre-applied. see timing diagram 200 s output turn-off delay t off from falling edge en. see timing diagram 600 s soft start ramp time t ss at full rated resistive load. typ spec is 1-up with min c out-ext . max spec is for arrays with max c out-ext 31 200 ms v out threshold for max rated load current v out-fl-thresh during startup, v out must achieve this threshold before output can support full rated current 14.0 v i out at startup i out-start max load current at startup while v out is below v out-fl_thresh 1.78 a monotonic soft-start threshold voltage v out-monotonic output voltage rise becomes monotonic with 25% of preload once it crosses v out-monotonic 14.0 v minimum required disabled duration t off-min this refers to the minimum time a module needs to be in the disabled state before it will attempt to start via en 2 ms minimum required disabled duration for predictable restart t off-monotonic this refers to the minimum time a module needs to be in the disabled state before it is guaranteed to exhibit monotonic soft-start and have predictable startup timing 100 ms voltage deviation (transient) %v out-trans minimum c out_ext (10 ? 90% load step), excluding load line. <10 % settling time t settle 10.0 ms powertrain protections input voltage initialization threshold v in-init threshold to start t init delay 75 v input voltage reset threshold v in-reset latching faults will clear once v in falls below v in-reset 50 v input undervoltage recovery threshold v in-uvlo- 96 152 v input undervoltage lockout threshold v in-uvlo+ see timing diagram 160 v input overvoltage lockout threshold v in-ovlo+ 455 v input overvoltage recovery threshold v in-ovlo- see timing diagram 420 v output overvoltage threshold v out-ovp from 25% to 100% load. latched shutdown 35.0 v output overvoltage threshold v out-ovp-ll from 0% to 25% load. latched shutdown 36.4 v minimum current limited v out v out-uvp over all operating steady-state line and trim conditions 10 v overtemperature threshold (internal) t int-otp 125 c power limit p lim 847 w v in overvoltage to cessation of powertrain switching t ovlo-sw independent of fault logic 1.4 s v in overvoltage response time t ovlo for fault logic only 200 s v in undervoltage response time t uvlo 100 ms short circuit response time t sc powertrain on, operational state 200 s short circuit, or temperature fault recovery time t fault see timing diagram 1 s mdcm270p280m500a40 dcm? dc-dc converter rev 1.1 vicorpower.com page 6 of 25 07/2015 800 927.9474 signal speci?cations specifications apply over all line, trim and load conditions, internal temperature t int = 25oc, unless otherwise noted. boldface specifications apply over the temperature range of -55c < t int < 125c. enable: en ? the en pin enables and disables the dcm converter; when held low the unit will be disabled. ? the en pin has an internal pull-up to vcc and is referenced to the -in pin of the converter. signal type state attribute symbol conditions / notes min nom max unit digital input any en enable threshold v enable-en 2.31 v en disable threshold v enable-dis 0.99 v internally generated v cc v cc 3.21 3.30 3.39 v en internal pull up resistance to v cc r enable-int 9.5 10.0 10.5 k trim: tr ? the tr pin enables and disables trim functionality when v in is initially applied to the dcm converter. when vin ?rst crosses v in-uvlo+ , the voltage on tr determines whether or not trim is active. ? if tr is not ?oating at power up and has a voltage less than tr trim enable threshold, trim is active. ? if trim is active, the tr pin provides dynamic trim control with at least 30hz of -3db control bandwidth over the output voltage of the dcm converter. ? the tr pin has an internal pull-up to v cc and is referenced to the -in pin of the converter. signal type state attribute symbol conditions / notes min nom max unit digital input startup tr trim disable threshold v trim-dis trim disabled when tr above this threshold at power up 3.20 v tr trim enable threshold v trim-en trim enabled when tr below this threshold at power up 3.15 v analog input operational with trim enabled internally generated v cc v cc 3.21 3.30 3.39 v tr pin functional range v trim-range 0.00 2.46 3.16 v v out referred tr pin resolution v out-res with v cc = 3.3 v 40 mv tr internal pull up resistance to v cc r triim-int 9.5 10.0 10.5 k fault: ft ? the ft pin is a fault ?ag pin. ? when the module is enabled and no fault is present, the ft pin does not have current drive capability. ? whenever the powertrain stops (due to a fault protection or disabling the module by pulling en low), the ft pin output vcc and provides current to drive an external ciruit. ? when module starts up, the ft pin is pulled high to v cc during microcontroller initialization and will remain high until soft start process starts. signal type state attribute symbol conditions / notes min nom max unit digital output any ft internal pull up resistance to v cc r fault-int 474 499 524 k ft active ft voltage v fault-active at rated current drive capability 3.0 v ft current drive capability i fault-active over-load beyond the absolute maximum ratings may cause module damage 4 ma ft response time t ft-active delay from cessation of switching to ft pin active 200 s mdcm270p280m500a40 dcm? dc-dc converter rev 1.1 vicorpower.com page 7 of 25 07/2015 800 927.9474 mdcm270p280m500a40 dcm? dc-dc converter rev 1.1 vicorpower.com page 8 of 25 07/2015 800 927.9474 functional block diagram +in +v in Cn +out Cut primary & secondary powertrains C in c out-int c in-int modulator v cc tr en ft primary based v out sense power limit v out load regulation and i limit v eao error amplifier +v in primary based i out sense powertrain enable fault monitoring otp undervoltage lockout output short circuit output under voltage overvoltage lockout ovp control & monitoring reference and soft start temperature synchronous floating mosfet gate driver top cell bottom cell high level functional state diagram conditions that cause state transitions are shown along arrows. sub-sequence activities listed inside the state bubbles. latched fault powertrain: stopped ft = true standby powertrain: stopped ft = true application of v in initialization sequence t init delay powertrain: stopped ft = true v in >v in-init soft start v out ramp up t ss delay powertrain: active ft = false running regulates v out powertrain: active ft = false non latched fault t fault powertrain: stopped ft = true non latched fault t off powertrain: stopped ft = true en = true and no faults t on delay t ss expiry en = false t off delay reinitialization sequence t init delay powertrain: stopped ft = true en = false f a ult r em o v e d i n p u t o v lo or i nput u vl o fault removed outp u t o vp out put o v p o v e r - te m p or ou t p ut u v p ove r -t emp or o u t pu t uv p in put ov lo o r i n p u t uv l o en = false t off-min delay en = false t min-off delay v in >v in-uvlo+ and not over-temp tr mode latched mdcm270p280m500a40 dcm? dc-dc converter rev 1.1 vicorpower.com page 9 of 25 07/2015 800 927.9474 v out-nom full load v out v in-uvlo+/- i out full load v out-uvp v in-ovlo+/- v in tr i load input output en 1 input power on - trim inactive 3 tr ignored 4 en low 5 en high 6 input ovlo 7 input uvlo 2 ramp to full load t init t on t ss t off t off t ss t ss t off t off 8 input returned to zero v tr-dis ft t min_off t ss t on v in-init timing diagrams module inputs are shown in blue; module outputs are shown in brown. mdcm270p280m500a40 dcm? dc-dc converter rev 1.1 vicorpower.com page 10 of 25 07/2015 800 927.9474 v out-nom full load v out v in-uvlo+/- i out full load v out-uvp v in-ovlo+/- v in tr i load input output en v tr = nom v tr-en v out-ovp 9 input power on - trim active 11 load dump and reverse current 12 vout ovp (primary sensed) 14 current limit with resistive load 15 resistive load with decresing r 10 vout based on v tr t init t on t ss t off t init t on t ss t init t on t ss 13 latched fault cleared t iout-lim 16 overload induced output uvp t fault r load ft v in-init timing diagrams (cont.) module inputs are shown in blue; module outputs are shown in brown. mdcm270p280m500a40 dcm? dc-dc converter rev 1.1 vicorpower.com page 11 of 25 07/2015 800 927.9474 |