Hi-Rel DC/DC CONVERTER
MGDM-150 : 150W POWER
Hi-Rel
Grade
5:1 Low Input Voltage : 9-45 & 16-80 VDC
Single Output
Metallic case - 1.500 VDC Isolation
• Ultra wide input range 16-80 Vdc, 9-45 Vdc
• 28Vdc input compliant with MIL-STD-704A/D/F
• Industry standard half brick package
• Power up to 150 W
• Wide temperature range : -40°C/+ 105° baseplate
• High efficiency (typ. 86%-90%)
• Soft start
• Galvanic isolation 1.500 VDC
• Integrated LC EMI filter
• Synchronizable
• Load sharing, N+1 redundancy
• No load to full load operation
• Fully protected by independant security
• Under & overvoltage lock-out
• Overvoltage protection
• Current limitation protection
• Over temperature protection
• No optocoupler for high reliability
The MGDM-150 low input voltage series is a
complete line of high density wide input range
DC/DC power modules designed for aerospace,
military and high-end industrial applications. These
modules use a patented fixed switching topology
at 420 KHz providing ultra wide input range, low
noise characteristics and high power density. Stan-
dard models are available with ultra wide input
voltage range of 9-45, 16-80 volts. The series
include single output voltage choices of 3,3, 5,
12, 15, 24, 28 volts.
The MGDM-150 low input voltage series include
synchronization load sharing, trim and sense
functions.
The synchronization function allows to synchronize
more than one converter to one frequency or an
external source frequency. The load sharing allows
parallel operation to increase power with a true
N+1.
All the modules are designed with LC network
filters to minimize reflected input current ripple
and output voltage ripple.
The modules have totally independant security
functions including input undervoltage and
overvoltage lock-out, output overvoltage protec-
tion, output current limitation protection, and
temperature protection. Additionnally a soft-start
function allows current limitation and eliminates
inrush current during start-up.
The design has been carried out with surface
mount components, planar transformer and is
manufactured in a fully automated process to
guarantee high quality. The modules are potted
with a bi-component thermal conductive
compound and used an insulated metallic
substrate to ensure optimum power dissipation
under harsh environmental conditions.
1-General
4
2-Product Selection
Single output model
: MGDS-150-
(/T) and/or (/S)
(/T) : option for -55°C start up operating temperature
(/S) : option for screening and serialization
Input Voltage Range
Permanent
H : 9-45 VDC
O : 16-80 VDC
B
C
E
F
I
J
Output
:
:
:
:
:
:
3.3 VDC
5 VDC
12 VDC
15 VDC
24 VDC
28 VDC
REDEFINING THE SOURCE OF POWER
©
Gaia Converter FC02-009.08/06 Revision N
For locations, phone, fax, E-Mail see back cover
MGDM-150 Low Input Series
3- Block Diagram
The MGDM-150 low input series DC/DC converter is
based on a
constant
420KHz pulse-width modulated
forward topology designed for
ultra large input
range.
The output voltage is monitored on the secondary
side avoiding the use of optocoupler to optimize
long-term reliability
and provide good immunity
against radiations.
An auxilliary supply is implemented to feed
independently all security functions such as the input
undervoltage lock-out (UVLO), overvoltage lock-out
(OVLO), the output overload protection (OCP), the
output overvoltage protection (OVP) and the ther-
mal protection (OTP).
Hi-Rel
Grade
As this auxilliary power is independent from the main
power supply, the module features an
extreme wide
trim windows from 10% to 110%
of the nominal
output voltage.
The main power transformer designed for more than
150W power is a multi-layer planar transformer which
allows 100% reproductibility for optized module
efficiencies.
The controlled feedback regulation is located at the
secondary side allowing a high regulation bandwidth
and a very fast response to load changes.
4
©
Gaia Converter FC02-009.08/06 Revision N
3
For locations, phone, fax, E-Mail see back cover
MGDM-150 Low Input Series
4- Electrical Specifications
Data are valid at +25°C, unless otherwise specified.
Parameter
Input
Nominal input voltage
Permanent input
voltage range (Ui)
Input surge withstand
Undervoltage lock-out
(UVLO)
Overvoltage lock-out
(OVLO)
Start up time
Reflected ripple current
Input current in short
circuit
mode (Average)
No load input current
Input current in inhibit
mode
Output
Conditions
Limit or
typical
Nominal
Min. - Max.
Maximum
Nominal
Nominal
Nominal
Nominal
Maximum
Maximum
Typical
Maximum
Maximum
Units
Hi-Rel
Grade
Single Output MGDS-150
150 - H
24
9 - 45
50/1
8,5
7,5
45
46
30
200
1
30
15
150 - O
28
16 - 80
100/1
15,5
14,5
80
81
30
500
1
30
15
Full temperature range
Full temperature range
Above OVLO converter
Turns - off
Turn-on voltage
Turn-off voltage
Turn-on voltage
Turn-off voltage
Ui nominal
Nominal output
Full load : resistive
Ui nominal, full load
BW = 20MHz
Ui nominal
Short-circuit
Ui nominal
No load
Ui nominal
Inhibit
VDC
VDC
VDC/min.
VDC
VDC
VDC
VDC
ms
mApp
A
mA
mA
Output voltage *
Ui min. to max.
Nominal
Nominal
Nominal
Nominal
Nominal
Nominal
Maximum
Maximum
Maximum
Maximum
Maximum
Maximum
Maximum
Maximum
Typical
Typical
Typical
Typical
Maximum
Minimum
Maximum
Typical
VDC
VDC
VDC
VDC
VDC
VDC
%
W
A
A
A
A
A
A
mVpp
mVpp
mVpp
mVpp
%
%
%
%
3,3
5
12
15
24
28
+/- 2
100 to 150
30
25
12,5
10
6,25
5,35
50
100
150
250
+/- 1
10 **
110
3,3
5
12
15
24
28
+/- 2
100 to 150
30
30
12,5
10
6,25
5,35
50
100
150
250
+/- 1
10 **
110
4
Set Point accuracy *
Output power **
Output current **
3,3V output
5V output
12V output
15V output
24V output
28V output
Ripple output voltage ***
3,3V and 5V output
12V output
15V output
24V and 28V output
Output regulation *
(Line + load + thermal)
Output Voltage Trim
Efficiency
Ambient temperature : +25°c
Ui nominal, 75% load
At 105°c baseplate
Ui min. to max.
Full temperature range
Ui min. to max.
Ui nominal
Full load
BW = 20MHz
Ui min. to max.
0% to full load
As function of output voltage
Ui nominal
Full load
see curves page 5 and 6
Note * : These performances are measured with the sense line connected..
Note ** : It is recommended to mount the converter on a heatsink for this test, see section 10-3 and 10-9 for further details.
Note *** : The ripple output voltage is the periodic AC component imposed on the output voltage, an aperiodic and random component (noise) has also to be considered.
This noise can be reduced by adding 4 external decoupling capacitors connected between inputs and case and between outputs and case. These capacitance should
be layed-out as close as possible from the converter. Please refer to page 8 for more details.
©
Gaia Converter FC02-009.08/06 Revision N
4
For locations, phone, fax, E-Mail see back cover
MGDM-150 Low Input Series
4- Electrical Characteristics (continued)
Typical efficiency MGDS-150-H-B at 25˚C
85%
84%
83%
82%
Hi-Rel
Grade
Typical efficiency MGDS-150-H-C at 25˚C
90%
89%
88%
87%
86%
85%
84%
83%
82%
81%
80%
79%
78%
77%
76%
75%
5
10
15
20
25
30
35
40
45
Efficiency (%)
81%
80%
79%
78%
77%
76%
75%
74%
73%
5
10
15
20
25
30
35
40
45
25W
50W
75W
100W
Efficiency (%)
25W
50W
75W
100W
125W
Input voltage Vin (Vdc)
Input voltage Vin (Vdc)
Typical efficiency MGDS-150-H-E at 25˚C
88%
87%
86%
85%
87%
86%
85%
84%
83%
82%
81%
80%
79%
78%
77%
76%
75%
74%
73%
72%
71%
Typical efficiency MGDS-150-H-F at 25˚C
Efficiency (%)
84%
83%
82%
81%
80%
79%
78%
77%
5
10
15
20
25
30
35
40
45
25W
50W
75W
100W
125W
150W
Efficiency (%)
4
25W
50W
75W
100W
125W
150W
5
10
15
20
25
30
35
40
45
Input voltage Vin (Vdc)
Input voltage Vin (Vdc)
Typical efficiency MGDS-150-H-I at 25˚C
89%
88%
87%
86%
85%
84%
83%
82%
81%
80%
79%
78%
77%
76%
75%
74%
5
10
15
20
25
30
35
40
45
Typical efficiency MGDS-150-H-J at 25˚C
88%
86%
84%
Efficiency (%)
Efficiency (%)
82%
80%
78%
76%
74%
72%
70%
68%
5
10
15
20
25
30
35
40
45
25W
50W
75W
100W
125W
150W
25W
50W
75W
100W
125W
150W
Input voltage Vin (Vdc)
Input voltage Vin (Vdc)
©
Gaia Converter FC02-009.08/06 Revision N
5
For locations, phone, fax, E-Mail see back cover
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