models vdc o utput b2-53 size (max.): 3.200 x 2.600 x 0.460 inches (81.28 x 66.04 x 11.68 mm) see section b8, case n, for dimensions. weight: 120 grams typical screening: standard or es. see section c2 for screening options, see section a5 for ordering information. f eatures ?5? to +125 c operation 16 to 40 vdc input four fully regulated outputs internal emi filter meets mil-std-461c ce03 active transient suppressor built in hold-up function with flag fully isolated magnetic feedback fixed frequency, 550 khz typical topology ?single ended forward inhibit function indefinite short circuit protection undervoltage lockout quad 5 and 12 5 and 15 description the mqo series of dc/dc converters supply up to 16.5 watts in a four output configuration of 5 and 12 or 5 and 15 vdc. an integral emi filter and transient suppressor allow the converters to meet mil-std-461c standards without external components. an output hold-up feature provides a low power flag and full output power hold-up through transient dropout conditions. the mqo series converters are packaged in hermetically sealed cases and are rated for full power operation from ?5 to +125 c case temperature. this makes these units ideal for military, aero- space, and hi-rel industrial applications. a high gain bandwidth magnetically isolated control loop is used to precisely regulate the +5 vdc output. constant frequency pulse width with a single ended forward topology is used. the ? vdc output and the auxiliary outputs are independently controlled with low headroom regulators, eliminating cross regulation errors. the use of feedforward, compensation, and a high gain bandwidth control loop provides excellent rejection to the conducted audio spectrum of mil-std-704a-d and mil-std-461c. i ntegral emi f ilter the mqo series includes a a built-in emi filter and transient suppressor which allow the units to meet the most common military standards without any external components. the internal emi filter provides both differential and common mode attenuation on the input power lines to allow meeting the ce03 interference and cs02 susceptibility requirements. the active internal transient suppressor provides protection against mil-std-704a, 1275, and 461c line transients. protection is provided for transients up to 400 v from a 0.5 ohm source and 600 v from a 50 ohm source. b uilt -i n h old -u p f unction with f lag an output hold-up feature provides a low power flag and full output power hold-up through transient drop out conditions. at full load for a vin step from 28 to 0 volts, the minimum hold-up time will be 50 s. the low power flag (ttl high) is asserted 10 s before the end of the hold-up time. external capacitance can be added to extend hold-up time. s hort c ircuit p rotection mqo series converters provide predictable current limiters which directly sense output load current in the converter s secondary. during short circuit or overload conditions, the current limiters provide constant output current and an input power fold-back. u ndervoltage l ockout undervoltage lockout prevents the converters from operating below approximately 12 vdc input voltage which helps keep system current levels smooth, especially during initialization or re-start oper- ations. dc/dc c onverters 28 v olt i nput mqo series 16 watt
inhibit typical characteristics recommended operating conditions absolute maximum ratings input voltage 16 to 40 v output power 16.75 watts lead soldering temperature (10 sec per lead) 300? storage temperature range (case) ?5? to +150? b2-54 mqo series 16 watt dc/dc c onverters undervoltage lockout 12 v input typical isolation 100 megohm minimum at 500 v audio rejection up to 50 db conversion frequency 550 khz typical input voltage range 16 to 40 vdc continuous case operating temperature (tc) ?5? to +125? full power ?5? to +135? absolute derating output power/current linearly from 100% at 125? to 0% at 135? inhibit ttl open collector logic low (output disabled) referenced to input common logic high (output enabled) open collector mqo28512q mqo28515q parameter condition min typ max min typ max units output voltage +5 4.95 5.00 5.05 4.95 5.00 5.05 ? 4.95 5.00 5.05 4.95 5.00 5.05 + aux. 11.90 12.00 12.10 14.90 15.00 15.10 vdc ?aux. 11.90 12.00 12.10 14.90 15.00 15.10 output current +5 390 2000 390 2000 ? 0 350 0 350 + aux. 0 208 0 167 ma ?aux. 0 208 0 167 output power +5 1.95 10.00 1.95 10.00 v in = 16 to 40 vdc ? 0 1.75 0 1.75 + aux. 0 2.50 0 2.50 w ?aux. 0 2.50 0 2.50 output ripple +5 50 55 50 55 10 khz to 2 mhz ? 30 30 + aux. 50 50 mv p-p ?aux. 50 50 line regulation v in = 16 to 36 vdc +5 20 20 mv ?, aux. 50 50 load regulation minimum load to full 5 20 120 20 120 mv aux. 50 220 50 220 input voltage minimum load to full tc = ?5 to +125 c continuous 16 28 40 16 28 40 vdc transient 50 ms 0.5 ohm source 400 400 50 ohm source 600 600 v input current minimum load 230 230 full load 960 960 ma inhibited 10 10 input ripple 50 50 ma p-p efficiency 10 khz to 2 mhz 64 64 % start-up delay 20 20 ms electrical characteristics: 25? tc, 28 vdc vin, 100% load, unless otherwise specified.
b2-55 mqo series 16 watt dc/dc c onverters input common positive input voltage regulator and control 600 khz controller transient suppressor emi filter 4 output power converter rectifier and filters ref. amp and ref. inhibit positive aux. output negative aux. output negative 5 v output positive 5 v output output common 8 10 6 4 5, 9 lhr regulators f igure 1: mqo b lock d iagram
model numbering key pin out b2-56 mqo series 16 watt dc/dc c onverters pin designation 1 inhibit 2 positive input 3 input common 4 positive 5 v output 5 output common 6 negative 5 v output 7 low power flag 8 positive aux.output 9 output common 10 negative aux. output 11 hold-up common 12 positive hold-up input 13 case ground 1 2 3 11 12 13 4 5 6 7 8 9 10 bottom view mqo f igure 2: p in o ut mqo 28 512 q / es base model input voltage output voltage number of outputs (q = quad) (main and aux. vout) screening (standard screening has no designator in this position.) see section b8, case n, for dimensions 23624-001-dts rev a dq# 3003 all technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. interpoint reserves the right to make changes in products or specifications without notice. mqo series is a trademark of interpoint. copyright 1991 - 1999 interpoint. all rights reserved.
b8-34 case n c ases materials header cold rolled steel/nickel/tin cover cold rolled steel/nickel/tin pins #52 alloy (all cases) compression glass seal case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places 0.01 (0.2) for two decimal places unless otherwise specified caution heat from reflow or wave soldering may damage the device. solder pins individually with heat application not exceeding 300 c for 10 seconds per pin. 2.600 max (66.04) 3.200 max (81.28) case n top view cover placement and min/max dimensions see figure 53 for pin configuration f igure 52: c ase n m aximum d imensions
b8-35 case n c ases 1 2 3 11 12 13 4 5 6 7 8 9 10 0.000 0.180 (4.57) 0.382 (9..70 0.700 (17.78) 1.100 (27.94) 1.300 (33.02) 1.500 (38.10) 1.700 (43.18) 1.900 (48.26) 2.218 (56.34) 0.900(22.86) 2.420 (61.47) 0.000 0.150 (3.81) 0.350 (8.89) 0.550 (13.97) 2.540 (62.23) 2.650 (67.31) 2.850 (72.39) solder seal solder tip-off 0.467 (11.86) 0.000 0.032 / 0.040 (0.81 / 1.02) 0.240 / 0.260 (6.10 / 6.60) mqo series: screening ?standard or es case n bottom view f igure 53: c ase n d imensions
c2-10 test (125? products) standard /es /883 (class h)* pre-cap inspection method 2017, 2032 yes yes yes temperature cycle (10 times) method 1010, cond. c, -65? to 150? no no yes method 1010, cond. b, -55? to 125? no yes no constant acceleration method 2001, 3000 g no no yes method 2001, 500 g no yes no burn-in method 1015, 160 hours at 125? no no yes 96 hours at 125? case (typical) no yes no final electrical test mil-prf-38534, group a subgroups 1 through 6: -55?, +25?, +125? no no yes subgroups 1 and 4: +25? case yes yes no hermeticity testing fine leak, method 1014, cond. a no yes yes gross leak, method 1014, cond. c no yes yes gross leak, dip (1 x 10 -3 ) yes no no final visual inspection method 2009 yes yes yes test methods are referenced to mil-std-883 as determined by mil-prf-38534. *883 products are built with element evaluated components and are 100% tested and guaranteed over the full military temperature range of ?5? to +125?. mor series mflhp series mfl series mhp series mtr series mqo series** mhd series mhv series mhf+ series mhf series** mga series msa series mgh series mch series fm-704a emi filter fmd**/fme emi filter fmc emi filter fmh emi filter fmga emi filter fmsa emi filter hum modules** lcm modules** lim modules qa screening 125? products 125? p roducts applies to the following products **mflhp series, mqo series, mhf series, fmd emi filters, hum modules, and lcm modules do not offer ?83?screening.
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