VICOR MI-A22-MU, MI-A66-IU, MI-A66-MU, MI-A22-IU Datasheet

Product Highlights

The MI-IAM is an accessory
product to Vicor’s MI-Series of
DC-DC converters that provides
the EMI/RFI filtering and transient
protection required in military
applications. Designed for use
with all 28V and 270V input
MI-200 or MI-J00 converters, the
MI-IAM can drive any number of
modules with output loads to 200W.

The MI-IAM meets the conducted
emissions specifications of MIL­STD-461C/D and offers complete
input transient, surge, and spike
protection to the most severe
levels of MIL-STD-1275A and
704A. Reverse polarity protection
and overvoltage lockout provide
additional safeguards against
potentially damaging line
conditions. High power arrays can
be configured using the expansion
port capability of the MI-IAM.

MI-IAM

TM

Military Input Attenuator Modules

" Inputs:

28Vdc and 270Vdc

" MIL-STD-461C/D EMI compliance
" MIL-STD-810 environments
" MIL-STD-704A & MIL-STD1275A

transients and spikes

" Reverse polarity protection

" Output power: Up to 200W from

any combination of MI-200 or
MI-J00 modules

" Expansion port for additional power
" Short circuit protected

" Size: 2.28" x 2.4" x 0.5"

(57,9 x 61,0 x 12,7mm)

Specifications

(At TBP= 25°C, nominal line and 75% load, unless otherwise specified)

PARAMETER MIN TYP MAX UNITS NOTES
Input Characteristics

28Vdc modules Steady state input 18.8 28 50 Vdc

Input spike limit

-600 600 Vdc 10µS, 50Ω per MIL-STD-704A

-250 250 Vdc 100µS, 15mJ per MIL-STD-1275A
Input surge limit 100 Vdc 60mS, 0.5Ω per MIL-STD-1275A
Overvoltage shutdown 50 Vdc 100mS, automatic recovery
Reverse polarity protection Shunt diode: input fuse required
Recommended fuse 20 Amps F03A type

270Vdc modules Steady state input 125 270 400 Vdc

Input spike limit

800 Vdc 10µS, 50Ω

-600 600 Vdc 100µS, 15mJ
Input surge limit 500 Vdc 100mS, 0.5Ω
Overvoltage shutdown 400 Vdc 100mS, automatic recovery
Reverse polarity protection Shunt diode: input fuse required
Recommended fuse 4 Amps F03A type

All models No load power dissipation 0.5 1.5 Watts

Inrush current 110 125 % IinSteady state, lin10mS

EMC Characteristics; MIL-STD-461C/D

Input power leads Conducted emissions CE01, CE03,CE07 MIL-STD-461C

CE101, CE102 MIL-STD-461D

Conducted susceptibility CS01, CS02, CS06 MIL-STD-461C

CS101, CS114,CS116 MIL-STD-461D

Output Characteristics

Clamp voltage 28Vdc input 60 Vdc

270Vdc input 420 Vdc

Output power 250 Watts
Overload protection

28Vdc input 20 Amps

Foldback threshold; auto recovery

270Vdc input 4 Amps

with latched shutdown after 10mS

Isolation Characteristics

Input to base 1,500 V

rms

1 min.

Output to base 1,500 V

rms

1 min.

Environmental (MIL-STD-810)

Altitude - method 500.2 70,000 feet Procedure II
Humidity - method 507.2 86/240 % /hours Procedure 1, cycle 1
Acceleration - method 513.3 9 g's Procedure
Vibration - method 514.3 20 g's Procedure 1, category 6
Shock - method 516.3 40 g's Procedure 1

Reliability (MIL-HDBK-217F)

25°C Ground Benign: G.B. 3,352,133 hours
50°C Naval Sheltered: N.S. 804,512 hours
65°C Airborne Inhabited Cargo: A.I.C. 653,666 hours

Thermal Characteristics

Efficiency 97 %
Baseplate to sink 0.14 °C/Watt
Operating temperature, baseplate 100 °C See product grade specifications
Storage temperature 125 °C See product grade specifications

Mechanical Specifications

Weight 3 (85) ounces (grams)

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Features

MI-IAM 04/03 1 of 2

MI-IAM Model Selection Chart

Product Grade Specifications

MI-IAM Safe Operating Area*

5

6

7

8

9

4
3

2
1

0.080 Dia (2) places
Solder plate
over copper alloy

0.040 (1,0) Dia (7) places
Solder plate
over copper alloy

.01

Aluminum Base

Product ID
this surface

Function

+In

–In

+Out

Parallel

Gate Out

–Out

Pin #

1
2
3
4
5
6
7
8
9

FULL R

+0.030 (0,76)

-0.000 (0)

(5,6) Min.

(7,6) Min.

(44,4) Max.

2.40

2.28

0.12

0.50

1.90

0.65

(16,5)

0.49

(12,4)

0.30±.015

(7,6)±(0,38)

0.15

2.10

(53,4)

1.30

0.40

(10,2)

0.35± 0.015

(8,9)±(0,38)

1.40

(35,6)

1.00

(25,4)

0.70

(17,8)

+In
–In

Gate In

VI-IAM

(57,9)

(33,0)

(3,8)

0.15

(3,8)

(48,3)

0.22

(3,0)

(12,7)

0.30

(61,0)

1.75

*

Test data available for review or download from vicorpower.com

Mechanical Drawing

PARAMETER PRODUCT GRADE

I-Grade M-Grade

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 12 hours, 25 cycles 96 hours, 200 cycles
Temperature cycled with power off 12 cycles 12 cycles

17°C per minute rate of change -65°C to +100°C -65°C to +100°C
Test data supplied at these temperatures* -40°C, +80°C -55°C,+80°C

Warranty 2 years 2 years
Environmental compliance MIL-STD-810 MIL-STD-810
Derating NAVMAT P- 4855-1A NAVMAT P-4855-1A

MI-IAM

Gate Out

Parallel

Gate In

+Out

-Out

-In

-In

+In

+In

+
–

-Out

-S

+S

+Out

+In
Gate In

Gate Out

-In

MI-Converter

Trim

C1

4700 pF

4700 pF

Input Voltage Range Capacitance (C1)

28Vdc (18.8-50V) 390µF (Max.)
270Vdc (125-400V) 27µF (Max.)

Model Number Nominal Input Voltage Input Range Compatible MI-Series Converter

MI-A22-MU 28Vdc 18.8 –50Vdc MI-22x and MI-J2x-Mx M–grade
MI-A66-MU 270Vdc 125–400Vdc MI-26x and MI-J6x-Mx M–grade
MI-A22-IU 28Vdc 18.8–50Vdc MI-22x and MI-J2x-Ix I–grade
MI-A66-IU 270Vdc 125–400Vdc MI-26x and MI-J6x-Ix I–grade

Typical Connection Diagram

VOLTS-PEAK VALUE OF SPIKE VOLTAGE

TIME (SECONDS)

1s

0

10

100ms

-1

10

10ms

-2

10

1ms

-3

10

100µs

-4

10

10µs

-5

10

1µs

-6

10

-600

-500

-400

-300

-200

-100

0

100

200

300

400

500

600

Ratings Exceeded

Reverse Polarity

Protection

50V

OVP

28Vdc Input 270Vdc Input

* Refer to input characteristics

MI-IAM

MI-IAM 04/03 2 of 2

800
600
400
200

0
200
400
600

VOLTS-PEAK VALUE OF SPIKE VOLTAGE

-5

-6

10

10

10µs

1µs

10

100µs

-4

10
1ms

TIME (SECONDS)

Ratings Exceeded

OVP

Reverse Polarity

Protection

-1

-2

-3

10

10ms

10

100ms

500V
400V

0

10

1s