description the LCM-120 line conditioning module is a non-isolated dc/dc converter used to extend the input voltage range of interpoint s dc/dc converters. the LCM-120 delivers up to 120 watts of throughput power from a 12 to 50 volt dc source in one of three modes: 1. 12 to 24 volts input ?internal boost converter delivers 24 volts 2. 24 to 36 volts input ?input is connected directly to output 3. 36 to 50 volts input ?internal buck converter delivers 36 volts. c onverter d esign the LCM-120 module is protected by internal current limit circuitry which limits current according to input voltage. this feature also allows safe charging of large external capacitors. because current is sensed between input common and output common there is normally no external connection made between these pins. (note: if an external connection between input and output common is desired, the resistance of this external connection must be greater than 1 ohm.) the lcm module will work through up to an 80 volt transient for up to 120 milliseconds while holding the output at 36 vdc. f eatures features include an under voltage lockout, an inhibit input, a synchronization input and a power fail flag output. under voltage lockout prevents start-up for inputs less than 12 volts dc and will shut down the converter for an input of less than 10 volts dc. the inhibit input, when connected to input common, disables the internal converters and opens the output power path while leaving the power fail flag unaffected. inhibit is normally left open or pulled up with a resistor. the sync input allows synchronization of the LCM-120 module s internal clock to an external pulse source with lsttl level voltages and a 40% to 60% duty cycle. when unused, the sync should be left unconnected. the power fail flag output is a fully isolated npn opto-coupler transistor rated to 18 volts dc. it will drive an external lsttl load low if the LCM-120 module s input voltage drops below 10 volts dc and will remain active until the module output voltage also drops below 10 volts dc. l ow v in and h eavy l oads when the LCM-120 module is operated at 12 volts in and 120 watts output, line loss can become a major concern. the module will output 24 volts at 120 watts. allowing for efficiency, the input current will be [(120 watts / 0.88 / 12] = 11.36 a. if the resistance in the line from the power source to the LCM-120 is 0.05 ohms, the line loss at 12 volts from the power source will be (0.05 ?11.36) = 0.57 volts. the LCM-120 module will see 11.43 volts and will not start up. e xternal c apacitance interpoint recommends a minimum output capacitance of 330 uf and a total esr of at least 0.25 ohms to ensure stability of the lcm- 120 module s boost converter. for very low esr capacitors, an external series resistor (non-inductive) may be used to obtain the minimum total esr. the maximum recommended capacitance is 1f. b6-9 LCM-120 120 watt f eatures _55? to +125? 12 to 50 vdc input works through transients of up to 80 v for up to 20 ms. powers dc/dc converters requiring 28 vin nominal undervoltage lockout inhibit function sync function model LCM-120 output 24 to 36 vdc l ine c onditioning m odule 28 v olt i nput size (max.): 1.505 x 3.005 x 0.400 inches (38.23 x 76.33 x 10.16 mm) see section b8, case u1, for dimensions. weight: 95 grams max. screening: standard or es. see section c2 for screening options, see section a5 for ordering information.
typical characteristics sync and inhibit recommended operating conditions absolute maximum ratings b6-10 LCM-120 120 watt l ine c onditioning m odule input voltage LCM-120 parameters conditions as a condition min typ max units output voltage 12 to 24 23 24 24.5 continuous 24 to 36 v in vdc 36 to 50 35 36 37.5 transient 120 ms max 50 to 80 36 v output power 12 to 50 120 w output ripple full load 12 to 24 150 bw = 1o khz to 2 mhz 24 to 36 50 mv p-p 36 to 50 1500 input voltage continuous 12 28 50 vdc transient 120 ms 80 input current 12 125 160 no load 24 50 85 36 20 ma inhibited, pin 11 = 0 v 12 50 24 24 36 18 input ripple full load 150 ma p-p bw = 10 khz to 10 mhz efficiency 12 88 full load 24 95 % 36 90 inhibit current inhibited, pin 11 = 0 vdc 12 to 80 1 ma power fail flag v out > 10, pin 6 < 9.5 0.4, pin 9 vdc flag current = 0.4 ma power fail v in falling 9.5 10 vdc threshold v undervoltage v in rising 11.5 12 vdc lockout output esr > 0.25 ohms 330 1,000,000 f capacitor input voltage range 12 to 50 vdc continuous 80 v for 120 msec transient case operating temperature (tc) ?5? to +125? full power ?5? to +135? absolute derating output power/current derate linearly from 100% at 125? to 0% at 135? output voltage temperature coefficient 0.01%/?, typical isolation: any pin to case 100 megohm minimum at 500 v conversion frequency free run mode 600 khz, typical external sync range 550 to 650 khz inhibit pin voltage (unit enabled) 10 v typical input voltage range 12 to 50 continuous output power 120 watts lead soldering temperature (10 sec per lead) 300? storage temperature range (case) ?5? to +150? sync (550 to 650 khz.) duty cycle 40% to 60% logic low 0.8v, max logic high 4.5 v, min referenced to input common if sync is not used, leave unconnected inhibit: ttl open collector logic low (output disabled) logic low voltage 1.3 v max referenced to input common logic high (output enabled) electrical characteristics: 25? tc, 28 vdc vin, 100% load, free run, unless otherwise specified.
b6-11 LCM-120 120 watt l ine c onditioning m odule + 10 to 50 vdc rtn pwm controller LCM-120 emi filter mtr 28xxx msa 28xxx rtn (25w) (5w) +24 to +40 vdc energy storage for holdup if required distributed power to system interface c h 6 f6 f 6 f 6 f 0.01 w +40 +24 +10 +24 +40 +50 v in (volts) v out ?volts boost no control buck +80 / 120 ms, ~ ~ ~ ~ buck transient +12 f igure 1: s ystem b lock d iagram f igure 2: o utput v oltage
pin out b6-12 LCM-120 120 watt pin LCM-120 1 positive input 2 positive input 3 input common 4 input common 5 output common 6 positive output 7 no connection 8 no connection 9 power fail flag return 10 power fail flag output 11 inhibit 12 sync l ine c onditioning m odule angled corner indicates pin one. top view LCM-120 (pin side, marked side) 1 2 3 4 5 6 12 11 10 9 8 7 see section b8, case u1, for dimensions. f igure 3: p in o ut lcm ?120 / es base model output power screening (standard screening has no designator in this position.) model numbering key note: there is only one LCM-120 model. 27221-001-dts rev a dq# 3001 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. LCM-120 is a trademark of interpoint. copyright 1995 - 1999 interpoint. all rights reserved.
b8-36 case case u c ases materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold 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. case u top view (pin side) see figures 55 and 56 for dimensions 1.505 max (38.23) 3.005 (76.33) max. note: pins are shown for case u1. angled corner indicates pin one f igure 54: c ase u m aximum d imensions
b8-37 case u c ases angled corner indicates pin one. 1 2 3 4 5 6 12 11 10 9 8 7 0.000 0.050 (1.27) 0.000 0.120 (3.05) 0.250 (6.35) 0.450 (11.43) 0.650 (16.51) 0.850 (21.59) 1.050 (26.67) 1.250 (31.75) 1.380 (35.05) 1.505 (38.23) max. 0.000 0.120 (3.05) 0.250 (6.35) 2.750 (69.85) 2.880 (73.15) 3.005 (76.33) max. 0.128 dia (3.25). 0.040 dia (1.02) 0.23 (5.8) lead length 0.400 (10.16) max. 0.220 (5.59 top view case u1 mfl series and mhp series: screening ?standard, es or 883 mflhp series, fmd270 emi filter, and fmd28-461sl emi filters: screening ?standard or es smfl, smflhp, smhp, and ssp series; sfcs, and sfme emi filters: screening ?standard, class h or k hum70 module and lcm module: screening ?standard or es seam seal f igure 55: c ase u1
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 (some models do not offer ?83?screening, please refer to the individual series datasheets to determine what screening is available):
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