LCM-120ES CRANE [Crane Aerospace & Electronics.], LCM-120ES Datasheet

LCM-120ES

Manufacturer Part Number

LCM-120ES

Description

LINE CONDITIONING MODULE 28 VOLT INPUT

Manufacturer

CRANE [Crane Aerospace & Electronics.]

Datasheet

1.LCM-120ES.pdf (7 pages)

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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:

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.

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

• _55°C to +125°C

• 12 to 50 VDC input

• Works through transients of

• Powers DC/DC converters

• Undervoltage lockout

• Inhibit function

• Sync function

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.

EATURES

ONVERTER

EATURES

up to 80 V for up to 20 ms.

requiring 28 Vin nominal

ESIGN

Size (max.): 1.505 x 3.005 x 0.400 inches

Weight:

Screening: Standard or ES. See Section C2 for screening

INE

(38.23 x 76.33 x 10.16 mm)

See Section B8, case U1, for dimensions.

95 grams max.

options, see Section A5 for ordering information.

ONDITIONING

28 V

OLT

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.

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.

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.

XTERNAL

NPUT

IN AND

APACITANCE

ODULE

EAVY

OADS

LCM-120

MODEL

120 WATT

LCM-120

to 36 VDC

Output 24

B6-9

Related parts for LCM-120ES

LCM-120ES Summary of contents

Page 1

... XTERNAL 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 ...

Page 2

... 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) • typical LCM-120 MIN TYP MAX UNITS 23 24 24.5 — ...

Page 3

... PWM CONTROLLER + LCM-120 ENERGY STORAGE FOR HOLDUP IF REQUIRED MTR 28XXX C H (25W) DISTRIBUTED POWER TO SYSTEM INTERFACE YSTEM LOCK IAGRAM +12 +24 +40 +50 +80 / 120 ms, V (Volts IGURE UTPUT OLTAGE LCM-120 120 WATT 0.01 +24 TO +40 VDC MSA 28XXX (5W) RTN B6-11 ...

Page 4

... 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 B6-12 products or specifications without notice. LCM-120 is a trademark of Interpoint. Copyright © 1995 - 1999 Interpoint. All rights reserved ONDITIONING ODULE PIN OUT Angled corner indicates pin one ...

Page 5

CASE CASE U 1.505 max (38.23) B8-36 C ASES Angled corner indicates pin one 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 ...

Page 6

... 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 HUM70 Module and LCM Module: Screening – Standard or ES Angled corner 0.23 (5.8) Lead Length indicates pin one. ...

Page 7

... FMD/FME EMI Filter FMC EMI Filter FMH EMI Filter /ES /883 (Class H)* yes yes no yes yes no no yes yes no no yes yes no no yes yes no yes yes yes yes no no yes yes FMGA EMI Filter FMSA EMI Filter HUM Modules LCM Modules LIM Modules ...

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