Hi-Rel DC/DC CONVERTER
MGDM-150 : 150W POWER
MGDM-150 High Input Series
Hi-Rel
Grade
4:1 High Input Voltage : 120 - 480 VDC
Single Output
Metallic case
• Ultra wide input range 120-480 Vdc
• 270Vdc input compliant with MIL-STD-704A/D/F
• Industry standard half brick package
• Power up to 150 W
• Wide temperature range : -40/+105°C baseplate
• High efficiency (typ. 85%)
• Soft start
• Integrated LC EMI filter
• Synchronizable
• Load sharing, N+1 redundancy
• No load to full load operation
• Fully protected by independant security
• Undervoltage lock-out
• Overvoltage protection
• Current limitation protection
• Over temperature protection
• No optocoupler for high reliability
• Leaded process
PRELIMINARY
1-General
The MGDM-150 high 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 210 KHz providing ultra wide input
range, low noise characteristics and high power
density. Standard models are available with ul-
tra wide input voltage range of 120-480 volts.
The series include single output voltage choices
of 3,3, 5, 12, 15, 24, 28 volts.
The MGDM-150 high input voltage series include,
trim and sense functions synchronization and
load sharing.
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 redundancy.
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.
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2-Product Selection
MGDS - 150 -
input
output
/
option
Input Voltage Range
Permanent
T
:
120-480VDC
B
C
E
F
I
J
Output
:
:
:
:
:
:
3.3 VDC
5 VDC
12 VDC
15 VDC
24 VDC
28 VDC
Options :
/T : option for -55°C start up operating temperature
/S : option for screening and serialization
REDEFINING THE SOURCE OF POWER
FC05-048.01/10 Revision F
©
Gaia ConverterGaia Converter FC05-048.01/10 Revision F
©
1
For locations, phone, fax, E-Mail see back cover
MGDM-150 High Input Series
3- Block Diagram
The MGDM-150 high input series DC/DC converter is
based on a
constant
210KHz 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), the output overload
protection (OCP), the output overvoltage protection
(OVP) and the thermal 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
©
3
Gaia Converter FC05-048.01/10 Revision F
For locations, phone, fax, E-Mail see back cover
MGDM-150 High Input Series
4- Electrical Specifications
Data are valid at +25°C, unless otherwise specified.
Parameter
Input
Nominal input voltage
Permanent input
voltage range (Ui)
Undervoltage lock-out
(UVLO)
Start up time
Reflected ripple current
No load input power
Input power in inhibit
mode
Output
Conditions
Limit or
typical
Nominal
Min. - Max.
Nominal
Nominal
Maximum
Maximum
Maximum
Maximum
Maximum
Maximum
Nominal
Nominal
Nominal
Nominal
Nominal
Nominal
Maximum
Maximum
Maximum
Maximum
Maximum
Maximum
Maximum
Maximum
Typical
Typical
Typical
Typical
Maximum
Minimum
Maximum
Typical
Units
Hi-Rel
Grade
150 - T
Full temperature range
Full temperature range
Turn-on voltage
Turn-off voltage
Ui nominal
Nominal output
Full load : resistive
Ui nominal, full load
BW = 20MHz
Ui nominal
Ui maximum
Ui nominal
Ui maximum
VDC
VDC
VDC
VDC
ms
mApp
W
W
W
W
VDC
VDC
VDC
VDC
VDC
VDC
%
W
A
A
A
A
A
A
mVpp
mVpp
mVpp
mVpp
%
%
%
%
270
120 - 480
119
114
30
TBD
2,5
6
1
2,5
3,3
5
12
15
24
28
+/- 2
100 to 150
30
30
12,5
10
6,25
5,35
100
150
150
500
+/- 1
10 **
110
83%
Output voltage *
Ui min. to max.
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.
4
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
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.
©
4
Gaia Converter FC05-048.01/10 Revision F
For locations, phone, fax, E-Mail see back cover
MGDM-150 High Input Series
4- Electrical Characteristics (continued)
Efficiency versus input Voltage MGDS150TB
85%
80%
75%
70%
65%
60%
55%
50%
120
65%
Po=10W
Po=25W
Po=50W
Po=75W
Po=100W
Hi-Rel
Grade
Efficiency versus input Voltage MGDS150TC
90%
85%
80%
Po=15W
Po=37,5W
Po=75W
Po=112,5W
Po=150W
75%
70%
170
220
270
320
370
420
470
60%
120
170
220
270
320
370
420
470
Input voltage Vin (Vdc)
Input voltage Vin (Vdc)
Efficiency versus input Voltage MGDS150TE
90%
90%
Efficiency versus input Voltage MGDS150TF
85%
85%
80%
Po=15W
Po=37,5W
Po=75W
Po=112,5W
Po=150W
80%
Po=15W
Po=37,5W
Po=75W
Po=112,5W
Po=150W
4
75%
75%
70%
70%
65%
65%
60%
120
170
220
270
320
370
420
470
60%
120
170
220
270
320
370
420
470
Input Voltage Vin (Vdc)
Input voltage Vin (Vdc)
Efficiency versus input Voltage MGDS150TI
95%
90%
85%
80%
75%
70%
65%
60%
120
Po=15W
Po=37,5W
Po=75W
Po=112,5W
Po=150W
Efficiency versus input Voltage MGDS150TJ
100%
95%
90%
85%
80%
75%
70%
65%
60%
120
Po=15W
Po=37,5W
Po=75W
Po=112,5W
Po=150W
170
220
270
320
370
420
470
170
220
270
320
370
420
470
Input voltage Vin (Vdc)
Input Voltage Vin (Vdc)
©
5
Gaia Converter FC05-048.01/10 Revision F
For locations, phone, fax, E-Mail see back cover
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