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nbm ? in a via package rev 1.1 vicorpower.com page 1 of 23 05/2016 800 927.9474 features & benefts ? up to 160a continuous low voltage side current ? fixed transformation ratio(k) of 1/3 ? up to 1258 w/in 3 power density ? 97.9% peak efciency ? bidirectional operation capability ? integrated ceramic capacitance ltering ? parallel operation for multi-kw arrays ? ov, oc, uv, short circuit and thermal protection ? 3814 package ? high mtbf ? thermally enhanced via? package typical applications ? dc power distribution ? information and communication technology (ict) equipment ? high end computing systems ? automated test equipment ? industrial systems ? high density energy systems ? transportation product description the nbm in a via package is a high effciency bus converter, operating from a 36 to 46v dc high voltage bus to deliver a non- isolated 12 to 15.3v dc unregulated, low voltage. this unique ultra-low profle module incorporates dc-dc conversion, integrated fltering in a chassis or pcb mount form factor. the nbm offers low noise, fast transient response and industry leading effciency and power density. leveraging the thermal and density benefts of vicors via packaging technology, the nbm module offers fexible thermal management options with very low top and bottom side thermal impedances. when combined with downstream vicor dc-dc conversion components and regulators, the nbm allows the power design engineer to employ a simple, low-profle design which will differentiate the end system without compromising on cost or performance metrics. the nbm non-isolated topology allows start up and steady state operation in forward and reverse directions. it provides bidirectional protections. however if power train is disabled by any protection, and v lo is present, then voltage equal to v lo minus two diode drops will appear on high voltage side. size: 3.76 x 1.40 x 0.37 in 95.59 x 35.54 x 9.40 mm part ordering information product ratings v hi = 42v (36 C 46v) i lo = up to 160a v lo = 14v (12 C 15.3v) ( no load [1] high temperature current derating may apply; see figure 1, specifed thermal operating area. product function package length package width package type max high side voltage high side voltage range ratio max low side voltage max low side current product grade (case temperature) option field nbm 38 14 x 46 c 15 a6 y zz nbm = non-isolated bus converter module length in inches x 10 width in inches x 10 b = board via v = chassis via internal reference c = -20 to 100c [1] t = -40 to 100c [1] 00 = chassis/always on 04 = short pin/always on 08 = long pin/always on nbm ? in a via package bus converter non-isolated, fixed-ratio dc-dc converter nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 2 of 23 05/2016 800 927.9474 typical application nbm3814x46c15a6yzz providing xed ratio step-up dc-dc conversion. nbm is operating in reverse direction. nbm3814x46c15a6yzz at point of load providing xed ratio step-down dc-dc conversion to pol devices. nbm is operating in forward direction. nbm in a via package v lo fuse +hi +lo pgnd hi side lo side load v hi nbm in a via package v hi fuse +hi +lo pgnd hi side lo side pol v lo nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 3 of 23 05/2016 800 927.9474 13 +hi +lo to p view nbm in a 3814 via package - chassis (lug) mount +lo +hi 24 +hi +lo to p view nbm in a 3814 via package - board (pcb) mount +lo +hi 10 12 11 13 pgnd pgnd pgnd pgnd pgnd pgnd pgnd pgnd 24 11 13 13 10 12 pin confguration pin descriptions pin number signal name type function 1, 2 +hi high side power positive auto-transformer power terminal - on high voltage side 3, 4 +lo low side power positive auto-transformer power terminal - on low voltage side 10, 11, 12, 13 pgnd power return common negative auto-transformer power terminal nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 4 of 23 05/2016 800 927.9474 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. parameter comments min max unit +hi to pgnd -1 60 v hi_dc or lo_dc slew rate 1 v/s +lo to pgnd -1 20 v dielectric withstand* see note below high voltage side to case n/a v dc high voltage side to low voltage side n/a v dc low voltage side to case n/a v dc * the pgnd of the nbm in a via package is directly connected to the case. the nbm does not contain any insulation (isolation) from high voltage side to low voltage side nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 5 of 23 05/2016 800 927.9474 electrical specifcations specifcations apply over all line and load conditions, unless otherwise noted; boldface specifcations apply over the temperature range of -40c t case 100c (t-grade); all other specifcations are at t case = 25oc unless otherwise noted. attribute symbol conditions / notes min typ max unit general powe r train high voltage side to low vol tage side specifcation (forward direction) hi side input voltage range, continuous v hi_dc 36 46 v v hi controller v c_active v hi_dc voltage where c is initialized, (powertrain inactive) 15 v hi to lo input quiescent current i hi_q disabled, v hi_dc = 42v 8 ma t case 100oc 12 hi to lo no load power dissipation p hi_nl v hi_dc = 42v, t case = 25oc 12.5 19.5 w v hi_dc = 42v 5 28 v hi_dc = 36v to 46v, t case = 25 oc 22 v hi_dc = 36v to 46v 31 hi to lo inrush current peak i hi_inr_pk v hi_dc = 46v, c lo_ext = 3000 f, r load_lo = 20% of full load current 30 a t case 100oc 75 dc hi side input current i hi_in_dc at i lo_out_dc = 160a, t case 85oc 53.9 a transformation ratio k high voltage to low voltage, k = v lo_dc / v hi_dc , at no load 1/3 v/v lo side output current (continuous) i lo_out_dc t case 85c 160 a lo side output current (pulsed) i lo_out_pulse 10ms pulse, 25% duty cycle, i lo_out_avg 50% rated i lo_out_dc 176 a hi to lo effciency (ambient) h amb v hi_dc = 42v, i lo_out_dc = 160a 96.8 97.6 % v hi_dc = 36v to 46v, i lo_out_dc = 160a 96.5 v hi_dc = 42v, i lo_out_dc = 80a 97.3 97.8 hi to lo effciency (hot) h hot v hi_dc = 42v, i lo_out_dc = 160a, t case = 85c 96.7 97.1 % hi to lo effciency (over load range) h 20% 32a < i lo_out_dc < 160a 95 % hi to lo output resistance r lo_cold v hi_dc = 42v, i lo_out_dc = 160a, t case = -40c 0.8 1.3 1.7 m r lo_amb v hi_dc = 42v, i lo_out_dc = 160a 0.9 1.7 2.1 r lo_hot v hi_dc = 42v, i lo_out_dc = 160a, t case = 85c 1.5 2.1 2.4 switching frequency f sw frequency of the lo side voltage ripple = 2x f sw 1.14 1.20 1.26 mhz lo side output voltage ripple v lo_out_pp c lo_ext = 0 f, i lo_out_dc = 160a, v hi_dc = 42v, 20mhz bw 110 mv t case 100oc 205 nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 6 of 23 05/2016 800 927.9474 electrical specifcations (cont.) specifcations apply over all line and load conditions, unless otherwise noted; boldface specifcations apply over the temperature range of -40c t case 100c (t-grade); all other specifcations are at t case = 25oc unless otherwise noted. attribute symbol conditions / notes min typ max unit general powe r train high voltage side to low voltage side specifcation (forward direction) cont. effective hi side capacitance (internal) c hi_int effective value at 42v hi_dc 16.8 f effective lo side capacitance (internal) c lo_int effective value at 14v lo_dc 140 f effective lo side output capacitance (external) c lo_out_ext excessive capacitance may drive module into sc protection 3000 f effective lo side output capacitance (external) c lo_out_aext c lo_out_aext max = n * 0.5 * c lo_out_ext max , where n = the number of units in parallel protection high voltage side to low voltage side (forward direction) auto restart time t auto_restart startup into a persistent fault condition. non-latching fault detection given v hi_dc > v hi_uvlo+ 940 1010 ms hi side overvoltage lockout threshold v hi_ovlo+ 48 50 52 v hi side overvoltage recovery threshold v hi_ovlo- 46 48 50 v hi side overvoltage lockout hysteresis v hi_ovlo_hyst 2 v hi side overvoltage lockout response time t hi_ovlo 30 s hi side undervoltage lockout threshold v hi_uvlo- 28 30 32 v hi side undervoltage recovery threshold v hi_uvlo+ 30 32 34 v hi side undervoltage lockout hysteresis v hi_uvlo_hyst 2 v hi side undervoltage lockout response time t hi_uvlo 100 s hi side undervoltage startup delay t hi_uvlo+_delay from v hi_dc = v hi_uvlo+ to powertrain active, (i.e one time startup delay form application of v hi_dc to v lo_dc ) 30 ms hi side soft-start time t hi_soft-start from powertrain active. fast current limit protection disabled during soft-start 1 ms lo side output overcurrent trip threshold i lo_out_ocp 177 200 240 a lo side output overcurrent response time constant t lo_out_ocp effective internal rc flter 4 ms lo side output short circuit protection trip threshold i lo_out_scp 240 a lo side output short circuit protection response time t lo_out_scp 1 s overtemperature shutdown threshold t otp+ temperature sensor located inside controller ic 125 c overtemperature recovery threshold t otpC 105 110 115 c undertemperature shutdown threshold t utp temperature sensor located inside controller ic; protection not available for m-grade units. -45 c undertemperature restart time t utp_restart startup into a persistent fault condition. non-latching fault detection given v hi_dc > v hi_uvlo+ 3 s nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 7 of 23 05/2016 800 927.9474 attribute symbol conditions / notes min typ max unit general powe r train low voltage side to high voltage side specifcation (reverse direction) lo side input voltage range, continuous v lo_dc 12 15.3 v lo to hi no load power dissipation p lo_nl v lo_dc = 14v, t case = 25oc 12.5 20 w v lo_dc = 14v 5 29 v lo_dc = 12v to 15.3v, t case = 25oc 22 v lo_dc = 12v to 15.3v 31 dc lo side input current i lo_in_dc at i hi_dc = 53.3a, t case 85oc 162 a hi side output current (continuous) i hi_out_dc t case 85c 53.3 a hi side output current (pulsed) i hi_out_pulse 10ms pulse, 25% duty cycle, i hi_out_avg 50% rated i hi_out_dc 58.7 a lo to hi effciency (ambient) h amb v lo_dc = 14v, i hi_out_dc = 53.3a 96.4 97.2 % v lo_dc = 12v to 15.3v, i hi_out_dc = 53.3a 96.1 v lo_dc = 14v, i hi_out_dc = 26.7a 97.3 97.8 lo to hi effciency (hot) h hot v lo_dc = 14v, i hi_out_dc = 53.3a, t case = 85c 96.3 96.9 % lo to hi effciency (over load range) h 20% 10.66a < i hi_out_dc < 53.3a 94.6 % lo to hi output resistance r hi_cold v lo_dc = 14v, i hi_out_dc = 53.3a, t case = -40c 10 16 20 m r hi_amb v lo_dc = 14v, i hi_out_dc = 53.3a 12 20 24 r hi_hot v lo_dc = 14v, i hi_out_dc = 53.3a, t case = 85c 16 23 26 hi side output voltage ripple v hi_out_pp c hi_out_ext = 0f, i hi_out_dc = 53.3a, v lo_dc = 14v, 20mhz bw 330 mv t case 100oc 615 electrical specifcations (cont.) specifcations apply over all line and load conditions, unless otherwise noted; boldface specifcations apply over the temperature range of -40c t case 100c (t-grade); all other specifcations are at t case = 25oc unless otherwise noted. nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 8 of 23 05/2016 800 927.9474 attribute symbol conditions / notes min typ max unit protection l ow voltage side to high voltage side (reverse direction) effective hi side output capacitance (external) c hi_out_ext excessive capacitance may drive module into sc protection when starting from low voltage side to high voltage side 300 f lo side overvoltage lockout threshold v lo_ovlo+ 16 16.7 17.4 v lo side overvoltage recovery threshold v hi_ovlo- 15.3 16 16.7 v lo side overvoltage lockout response time t hi_ovlo 30 s lo side undervoltage lockout threshold v lo_uvlo- 9.3 10 10.7 v lo side undervoltage recovery threshold v hi_uvlo+- 10 10.7 11.4 v lo side undervoltage lockout response time t lo_uvlo 100 s hi side output overcurrent trip threshold i hi_out_ocp powertrain is stopped but current can fow from lo side to hi side through mosfet body diodes 56 66.7 80 a hi side output overcurrent response time constant t hi_out_ocp effective internal rc flter 4 ms hi side short circuit protection trip threshold i hi_scp powertrain is stopped but current can fow from lo side to hi side through mosfet body diodes 810 a hi side short circuit protection response time t hi_scp 1 s electrical specifcations (cont.) specifcations apply over all line and load conditions, unless otherwise noted; boldface specifcations apply over the temperature range of -40c t case 100c (t-grade); all other specifcations are at t case = 25oc unless otherwise noted. nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 9 of 23 05/2016 800 927.9474 lo side current (a ) hi side voltage (v ) i lo_out_dc i lo_out_pulse 0 20 40 60 80 100 120 140 160 180 200 36 37 38 39 40 41 42 43 44 45 46 lo side po we r (w ) hi side voltage (v) p lo_out_dc p lo_out_pulse 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 36 37 38 39 40 41 42 43 44 45 46 figure 1 specifed thermal operating area figure 2 specifed electrical operating area using rated r lo_hot lo side capacitanc e (% rated c lo_ext_max ) lo side current (% i lo_out_dc ) 0 10 20 30 40 50 60 70 80 90 100 1 10 0 20 40 60 80 100 lo side current (a ) case te mperature (c) 36 ? 46v 0 20 40 60 80 100 120 140 160 180 200 -60 -40 -20 0 20 40 60 80 100 120 figure 3 specifed hi side start-up into load current and external capacitance 1. the nbm in a via pacage is cooled through bottom case (bottom housing). 2. the thermal rating of the nbm in a via pacage is based on typical measured device effciency. 3. the case temperature in the graph is the measured temperature of the bottom housing, such that operating internal unction temperature of the nbm in a via pacage does not exceed 125c. nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 10 of 23 05/2016 800 927.9474 nbm? forward direction timing diagram +v hi inpu t +v lo v hi_dc input turn-on lo side output turn-on hi side input over voltag e v hi_dc input restart s h o rt circ u i t ev en t hi side input voltag e tu r n -o ff output startupo ver voltag e over current shutdown c initiali z e v hi_ovlo- v hi_ovlo+ v hi_uvl o+ v c_ acti ve v no m v hi _uvlo- t lo_out_sc p t hi _ uvlo +_ dela y t au to-restart > t hi _ uv lo +_ dela y nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 11 of 23 05/2016 800 927.9474 nbm? reverse direction timing diagram +v lo inpu t +v hi v lo_d c input turn-o n hi side output turn-on lo side over voltage v lo_d c input restart over current / s h or t ci r c u i t e v en t lo side input vo ltag e tu rn -off output startu po ver voltag e over current shutdown c in i t ia li z e v lo_ovlo- v lo_ovl o+ v lo_uvl o+ v c_active v no m v lo_uv lo- t hi_out_o cp t hi _ uvlo+_dela y > v hi =+ v lo ?( ~1.4v) not supported condition, permanent damage may occu r red line: load must not be present to prenevent damage to unit nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 12 of 23 05/2016 800 927.9474 application characteristics product is mounted and temperature controlled via top side cold plate, unless otherwise noted. all data presented in this section are collected data from high voltage side sourced units processing power in forward direction.see associated fgures for general trend data. hi to lo, power di ssipation (w ) hi side input voltage (v ) -4 0 c 25 c 85 c t top surface case : 0 3 6 9 12 15 18 21 24 27 30 36 37 38 39 40 41 42 43 44 45 46 47 case te mperature (oc) 36v 42v 46v hi to lo, full load efficiency (% ) v hi : 96.0 96.5 97.0 97.5 98.0 -40 -25 -10 5 20 35 50 65 80 95 hi to lo, efficiency (% ) lo side output current (a ) 36v 42v 46v v hi_dc : hi to lo, po we r di ssipation 0 8 16 24 32 40 48 56 64 72 80 79 81 83 85 87 89 91 93 95 97 99 0 16 32 48 64 80 96 11 2 128 144 160 p d figure 4 er iii figure 5 fu eie eerure figure 6 ie er iii 40 hi to lo, efficiency (% ) lo side output current (a ) 36v 42v 46v v hi_dc : hi to lo, po we r di ssipation 0 8 16 24 32 40 48 56 64 72 80 79 81 83 85 87 89 91 93 95 97 99 0 16 32 48 64 80 96 1 12 128 144 160 p d hi to lo, efficiency (% ) lo side output current (a ) 36v 42v 46v v hi_dc : hi to lo, po we r di ssipation 0 9 18 27 36 45 54 63 72 81 90 79 81 83 85 87 89 91 93 95 97 99 0 16 32 48 64 80 96 1 12 128 144 160 p d figure 7 ie er iii 25 case te mperature (c) 160a i lo_dc : hi to lo, output resistance (m) 0 1 2 3 -40 -20 0 20 40 60 80 100 figure 8 ie er iii 85 figure 9 eerure i 160 85 nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 13 of 23 05/2016 800 927.9474 figure 12 0aC 160a transient response: c h i_in_ext = 300f, no external c lo _out_ ext figure 11 full load ripple, 300f c hi_in_ext ; no external c lo_out_ ext . board mounted module, scope setting : 20mhz analog bw lo side output current (a ) 42v v hi_dc : lo side output voltage ri pple (mv) 0 6 12 18 24 30 36 42 48 54 60 0 16 32 48 64 80 96 1 12 128 144 160 figure 10 v lo_out_ pp vs. i lo_dc ; no external c lo_out_ ext . board mounted module, scope setting : 20mhz analog bw figure 13 160 a C 0a transient response: c h i_in_ext = 300f, no external c lo _out_ ext figure 14 forward start up from application of v hi_dc = 42v, 20% i lo_dc , 100% c lo_out_ ext figure 15 reverse start up from application of v lo _dc = 14v, 20% i h i_dc , 100% c hi _ out _ext nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 14 of 23 05/2016 800 927.9474 general characteristics specifcations apply over all line, load conditions, unless otherwise noted; boldface specifcations apply over the temperature range of -40c t case 100c (t-grade); all other specifcations are at t case = 25oc unless otherwise noted. attribute symbol conditions / notes min typ max unit mechanical length l lug (chassis) mount 95.34 / [3.75] 95.59 / [3.76] 95.84 / [3.77] mm / [in] length l pcb (board) mount 95.34 / [3.75] 95.59 / [3.76] 95.84 / [3.77] mm / [in] width w 35.29 / [1.39] 35.54 / [1.40] 35.79 / [1.41] mm / [in] height h 9.019 / [0.355] 9.40 / [0.37] 9.781 / [0.385] mm / [in] volume vol without heatsink 31.93 / [1.95] cm 3 / [in 3 ] weight w 130.4 / [4.6] g / [oz] pin material c145 copper, 1/2 hard underplate low stress ductile nickel 50 100 in pin finish palladium 0.8 6 in soft gold 0.12 2 thermal operating junction temperature t internal nbm3814x46c15a6yzz (t-grade) -40 125 c nbm3814x46c15a6yzz (c-grade) -20 125 operating case temperature t case nbm3814x46c15a6yzz (t-grade), derating applied, see safe thermal operating area -40 100 nbm3814x46c15a6yzz (c-grade), derating applied, see safe thermal operating area -20 100 thermal resistance top side r jc _ top estimated thermal resistance to maximum temperature internal component from isothermal top 1.39 c/w thermal resistance coupling between top case and bottom case r hou estimated thermal resistance of thermal coupling between the top and bottom case surfaces 0.51 c/w thermal resistance bottom side r jc _ bot estimated thermal resistance to maximum temperature internal component from isothermal bottom 0.83 c/w thermal capacity 52 ws/c assembly storage temperature t st nbm3814x46c15a6yzz (t-grade) -40 125 c nbm3814x46c15a6yzz (c-grade) -40 125 c esd withstand esd hbm human body model, esda / jedec jds-001-2012 class i-c (1kv to < 2 kv) 1000 esd cdm charge device model, jesd 22-c101-e class ii (200v to < 500v) 200 nbm3814x46c15a6yzz
nbm ? in a via package rev 1.1 vicorpower.com page 15 of 23 05/2016 800 927.9474 general characteristics (cont.) specifcations apply over all line, load conditions, unless otherwise noted; boldface specifcations apply over the temperature range of -40c t case 100c (t-grade); all other specifcations are at t case = 25oc unless otherwise noted. attribute symbol conditions / notes min typ max unit safety isolation capacitance c hi _ lo unpowered unit n/a n/a n/a pf isolation resistance r hi _ lo at 500 v dc 0 m mtbf mil-hdbk-217plus parts count - 25c ground benign, stationary, indoors / computer 2.2 mhrs telcordia issue 2 - method i case iii; 25c ground benign, controlled 3.6 mhrs agency approvals / standards ce marked for low voltage directive and rohs recast directive, as applicable nbm3814x46c15a6yzz

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