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FEATURES
* _55C to +125C * 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
LINE CONDITIONING MODULE 28 VOLT INPUT
LCM-120
LCM-120 120 WATT
MODEL
Output 24 to 36 VDC
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.
DESCRIPTION
The LCM-120TM 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. 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.
CONVERTER DESIGN
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.
LOW VIN AND HEAVY LOADS
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.
FEATURES
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
EXTERNAL CAPACITANCE
Interpoint recommends a minimum output capacitance of 330 uF and a total ESR of at least 0.25 ohms to ensure stability of the LCM120 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
LINE CONDITIONING MODULE
SYNC AND INHIBIT
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)
ABSOLUTE MAXIMUM RATINGS
Input Voltage Range * 12 to 50 continuous Output Power * 120 watts Lead Soldering Temperature (10 sec per lead) * 300C Storage Temperature Range (Case) * -65C to +150C
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient * 0.01%/C, 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
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range * 12 to 50 VDC continuous * 80 V for 120 msec transient Case Operating Temperature (Tc) * -55C to +125C full power * -65C to +135C absolute Derating Output Power/Current * Derate linearly from 100% at 125C to 0% at 135C
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
PARAMETERS OUTPUT VOLTAGE CONDITIONS CONTINUOUS TRANSIENT 120 ms MAX OUTPUT POWER OUTPUT RIPPLE FULL LOAD BW = 1O kHz TO 2 MHz CONTINUOUS TRANSIENT 120 ms NO LOAD INHIBITED, PIN 11 = 0 V 12 24 36 12 24 36 -- 12 24 36 12 TO 80 < 9.5 INPUT VOLTAGE AS A CONDITION 12 TO 24 24 TO 36 36 TO 50 50 TO 80 12 TO 50 12 TO 24 24 TO 36 36 to 50 MIN 23 -- 35 -- -- -- -- -- 12 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 330 LCM-120 TYP 24 VIN 36 36 -- 150 50 1500 28 -- 125 50 20 50 24 18 150 88 95 90 1 0.4, PIN 9 9.5 11.5 -- MAX 24.5 -- 37.5 -- 120 -- -- -- 50 80 160 85 -- -- -- -- -- -- -- -- -- -- 10 12 1,000,000 UNITS VDC V W mV p-p VDC
INPUT VOLTAGE INPUT CURRENT
mA
INPUT RIPPLE EFFICIENCY
FULL LOAD BW = 10 kHz TO 10 MHz FULL LOAD
mA p-p
% mA VDC VDC VDC F
INHIBIT CURRENT POWER FAIL FLAG POWER FAIL THRESHOLD V UNDERVOLTAGE LOCKOUT OUTPUT CAPACITOR
INHIBITED, PIN 11 = 0 VDC VOUT > 10, PIN 6 FLAG CURRENT = 0.4 mA VIN FALLING VIN RISING ESR > 0.25 OHMS
B6-10
LINE CONDITIONING MODULE
LCM-120 120 WATT
10 TO 50 VDC
RTN 0.01 EMI FILTER
LCM-120
ENERGY STORAGE FOR HOLDUP IF REQUIRED
MTR 28XXX CH (25W)
DISTRIBUTED POWER TO SYSTEM INTERFACE
FIGURE 1: SYSTEM BLOCK DIAGRAM
+40 ~ ~
NO CONTROL
+24
BOOST
BUCK
+10 +12
+24
+40
+50
~ ~
BUCK TRANSIENT
VOUT - VOLTS
+80 / 120 ms,
VIN (Volts)
FIGURE 2: OUTPUT VOLTAGE
+ +24 TO +40 VDC MSA 28XXX (5W) RTN
PWM CONTROLLER
-
6 F
6 F
6 F
6 F
B6-11
LCM-120 120 WATT
LINE CONDITIONING MODULE
PIN OUT Angled corner indicates pin one.
Pin 1 2 3 4 5 6 7 8 9 10 11 12
LCM-120 Positive Input Positive Input Input Common Input Common Output Common Positive Output No Connection No Connection Power Fail Flag Return Power Fail Flag Output Inhibit Sync
1 2 3 4 5 6
12 11
TOP VIEW LCM-120 (Pin side, marked side)
See Section B8, case U1, for dimensions.
10 9 8 7
FIGURE 3: PIN OUT
MODEL NUMBERING KEY
LCM - 120 / ES Base Model Output Power Screening (Standard screening has no designator in this position.)
Note: There is only one LCM-120 model.
B6-12
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 (c) 1995 - 1999 Interpoint. All rights reserved.
CASE U
CASES
Angled corner indicates pin one
1.505 max (38.23)
CASE U TOP VIEW (PIN SIDE) See Figures 55 and 56 for dimensions
3.005 (76.33) max. Note: Pins are shown for Case U1.
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 300C for 10 seconds per pin.
FIGURE 54: CASE U MAXIMUM DIMENSIONS
B8-36
CASES
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
Angled corner indicates pin one. 1.505 (38.23) max. 1.380 (35.05) 1.250 (31.75) 1.050 (26.67) 0.850 (21.59) 0.650 (16.51) 0.450 (11.43) 0.250 (6.35) 0.120 (3.05) 0.000
0.400 (10.16) max.
CASE U
Seam Seal
0.23 (5.8) Lead Length 0.128 dia (3.25). 0.040 dia (1.02) 1 2 3 4 5 6 12 11 10 9 8 7
0.120 (3.05) 0.250 (6.35)
2.750 (69.85)
2.880 (73.15) 3.005 (76.33) max.
0.220 (5.59
FIGURE 55: CASE U1
0.050 (1.27) 0.000
0.000
B8-37
QA SCREENING 125C PRODUCTS
125C PRODUCTS
TEST (125C Products) PRE-CAP INSPECTION Method 2017, 2032 TEMPERATURE CYCLE (10 times) Method 1010, Cond. C, -65C to 150C Method 1010, Cond. B, -55C to 125C CONSTANT ACCELERATION Method 2001, 3000 g Method 2001, 500 g BURN-IN Method 1015, 160 hours at 125C 96 hours at 125C case (typical) FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 through 6: -55C, +25C, +125C Subgroups 1 and 4: +25C case HERMETICITY TESTING Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10-3) FINAL VISUAL INSPECTION Method 2009 STANDARD /ES /883 (Class H)* yes yes yes
no no
no yes
yes no
no no
no yes
yes no
no no
no yes
yes no
no yes
no yes
yes no
no no yes
yes yes no
yes yes no
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 -55C to +125C. Applies to the following products (some models do not offer "883" screening, please refer to the individual series datasheets to determine what screening is available): MOR Series MHD Series MGH Series FMGA EMI Filter MFLHP Series MHV Series MCH Series FMSA EMI Filter MFL Series MHF+ Series FM-704A EMI Filter HUM Modules MHP Series MHF Series FMD/FME EMI Filter LCM Modules MTR Series MGA Series FMC EMI Filter LIM Modules MQO Series MSA Series FMH EMI Filter
C2-10

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