Vicor MI-RAM Military ripple attenuator module Datasheet

TM
MI - RAM
Military Ripple Attenuator Modules
Features
" Reduces output PARD to <10mV pp
" 93%-99% efficiency
" Full attenuation up to 20A load
" Converter sense, trim, OV
and OC retained
" Compatible with all MI-Series units
from 5 to 50Vdc output
" MIL-STD-810 environments
" Size: 2.28" x 2.4" x 0.5"
(57,9 x 61,0 x 12,7mm)
" No adjustments required
Product Highlights
The MI-RAM is designed for
military applications where
extremely low noise outputs are
required. When used with any
Vicor MI-Series DC-DC converter,
the MI-RAM reduces both line
frequency related ripple and
switching noise to less than
10mV p-p, DC to 20MHz.
The combination of the MI-RAM
with an MI converter provides the
output noise performance of a
linear supply at a power density
in excess of 15W/in3.
All of the features of the MI-Series
converter remain available while
using the MI-RAM, including
output voltage trimming, OVP and
OTP (MI-200 only), current limiting,
remote sense, and output inhibit.
All units are manufactured in ISO
9001-registered facilities. Full
epoxy encapsulation in a low
profile package enables the MI-RAM
to meet MIL-STD-810 environmental
testing requirements.
Specifications
(At TBP = 25°C, unless otherwise specified)
PARAMETER
MIN
TYP
Output noise and ripple
MAX
UNITS
NOTES
2.0
6.0
3.0
mV pp
MI-200; 10% to 100% load
10.0
mV pp
MI-J00; 10% to 100% load
Input voltage range
5Vdc
50
Vdc
Output voltage accuracy
99.5
100.5
%
Of MI source converter
Full load current
10
A
MI-RAM-I1 and MI-RAM-M1
20
A
MI-RAM-I2 and MI-RAM-M2
DC voltage drop
0.34
0.38
10% to full load
Dissipation = (DC voltage drop x load current) + (Vin x 15 mA)
Isolation
250
Vrms
Input/output to baseplate
Weight
3.0 (85)
ounces (grams)
Product Grade Specifications
PARAMETER
PRODUCT GRADE
Storage temperature
Operating temperature (baseplate)
Power cycling burn-in
Temperature cycled with power off
17°C per minute rate of change
I - Grade
M- Grade
-55°C to +125°C
-65°C to +125°C
-40°C to +100°C
-55°C to +100°C
12 hours, 25 cycles
96 hours, 200 cycles
12 cycles
-65°C to +100°C
12 cycles
-65°C to +100°C
-40°C, +80°C
-55°C, +80°C
Test data supplied at these temperatures*
Warranty
Environmental compliance
2 years
2 years
MIL-STD-810
MIL-STD-810
*Test data available for review or download from vicorpower.com
Attenuation vs. Frequency (typical)
25 db
Mechanical Drawing
30 db
Attenuation
35 db
2.28
(57,9)
40 db
0.49
(12,4)
45 db
50 db
0.30±0.015
(7,6)±(0,38)
55 db
60 db
10 Hz
100 Hz
1 KHz
10 KHz
100 KHz
1 MHz
10 MHz
1.30
(33,0)
0.65
(16,5)
4
0.080 Dia (2) places
Solder plate
over copper alloy
Pin #
1
2
3
4
5
6
7
8
9
9
Frequency
3
2.10
(53,4)
Input to the converter
(10V/cm)
Output from the RAM
(2mV/cm)
8
MI-RAM
7
2
6
1
5
1.40
1.00 (35,6)
0.70 (25,4)
0.40 (17,8)
(10,2)
0.35± 0.015
(8,9)±(0,38)
0.15
(3,8)
FULL R
0.15
(3,8)
1.90
(48,3)
0.040 (1,0) Dia (7) places
Solder plate
over copper alloy
2.40
(61,0)
Product ID
this surface
0.30
(7,6) Min.
0.22
(5,6) Min.
0.50
(12,7)
1 of 1
0.12
(3,0)
1.75
(44,4) Max.
+0.030 (0,76)
-0.000 (0)
0.01
MI-RAM 04/03
Function
+In
+Sense In
–Sense In
–In
+Out
+Sense
NC
–Sense
–Out
Aluminum Base
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