380

MILIT AR Y COTS OUTPUT RIPPLE A TTENUA TOR MODULES

Features

•

Compatible with all MI- series modules

•

Military Specification Compliance

•

Environments: MIL-STD-810

•

Efficiency 93-99%

•

Operating Temperature to 100°C

•

No adjustment required

•

Reduces output PARD to < 10mVp-p

•

Full attenuation up to 20A load

Electrical Considerations

TRANSIENT RESPONSE AND DYNAMIC RANGE:

Full rated noise attenuation will be maintained at the MI-RAM output for step

load changes up to 10% of the rated output current of the source converter,

with the MI—RAM exhibiting an underdamped output excursion of less than

10mV pp. Some degradation in noise attenuation during the transient response

period following the step may be exhibited for larger load changes. Adding

output capacitance to the MI-RAM will increase the dynamic rejection range.

SENSE CONNECTION:

Both sense-in and sense-out connections are provided on the MI-RAM. Sense-

in connections must be connected to the corresponding sense connections on

the Vicor converter from which the MI-RAM is powered. Sense-out pins on the

MI-RAM must be connected either directly to the MI-RAM power-output pins, or

at the point of load.

OUTPUT LOAD CHARACTERISTICS:

When used in combinations with Vicor DC-DC converters, and with sense leads

connected, the MI-RAM will be stable for any non-inductive load.

Specifications

INPUT

Input Voltage Range

5Vdc to 50Vdc

DC Voltage Drop

0.34 to 0.38 No load to full load

OUTPUT

Efficiency

93 to 99%

Output Noise & Ripple

MI-200: 2mVp-p typical

MI-J00: 6mV p-p typical

10%-100% load

10%-100% load

Output Voltage Accuracy

99.5% to 100.5%

DC Voltage Drop

0.34 to 0.38 No load to full load

Full Load Current

MI-RAM-I1: 10A

MI-RAM-M1: 10A

MI-RAM-I2: 20A

MI-RAM-M2: 20A

OPERATING

Isolation Characteristics

Input / Output / Base 250V rms

ENVIRONMENTAL

Part number

MI-RAM-I2

MI-RAM-M2

Storage Temperature

-55°C to +125°C

-65°C to +125°C

Operating Temperature

(baseplate)

-40°C to +100°C

-55°C to +100°C

Power Cycling Burn-in

12hrs 25 cycles

96hrs 200 cycles

Temperature Cycling

48 hrs, 12cycles

-65°C to +100°C

48hrs, 12cycles

-65°C to +105°C

Test Data Supplied at these

Temperatures

-40°C, +80°C

-55°C, +80°C

Derating

NAVMATP-4855-1A

STANDARDS AND APPROVALS

Spikes

±50% nom line voltage per MIL-STD-6051 50ms

Conducted EMI

CE102 per MIL-STD-461D

Environmental (MIL-STD-810D)

Altitude – Method 500.2

40,000 ft

Humidity - Method 507.2

86,240 % hours

Acceleration – Method

513.3

9 g’s

Vibration – Method 514.3

20 g’s

Shock – Method 516.3

40 g’s

Reliability (MIL-HDBK-217E)

25°C Ground Benign

885,917 hours

50°C Naval Sheltered

87,068 hours

65°C Airborne inhabited

cargo

49,153 hours

MECHANICAL

Weight

85 grams

Dimensions

57.9 x 61 x 12.7mm