M3GB-SERIES 120V Input, Single/Dual Output HYBRID-HIGH RELIABILITY RADIATION HARDENED DC-DC CONVERTER
family of products. The M3GB-Series of DC-DC converters
are second generation design of the legacy M3G-Series
product family but with enhanced overall performance.
M3GB-Series is form, fit and functional equivalent to the
first generation M3G-Series. It is designed to be backward
compatible to the M3G-Series with the addition of an
output voltage adjustment pin for the single output models.
Much the same as the original M3G-Series, these
converters are radiation hardened, high reliability
converters designed for extended operation in hostile
environments. Their small size and low weight make them
ideal for applications such as geostationary earth orbit
satellites and deep space probes. They exhibit a high
tolerance to total ionizing dose, single event effects and
environmental stresses such as temperature extremes,
mechanical shock, and vibration.
The converters incorporate a fixed frequency single ended
forward topology with magnetic feedback and an internal
EMI filter that utilizes multilayer ceramic capacitors that are
subjected to extensive lot screening for optimum reliability.
These converters are capable of meeting the conducted
emissions and conducted susceptibility requirements of
MIL-STD-461C without any additional components.
External inhibit and synchronization input and output allow
these converters to be easily incorporated into larger
power systems. They are enclosed in a hermetic 3" x 2" x
0.475" package constructed of an Aluminum/SiliconCarbide (Al/SiC) base and an Alloy 48 ring frame and they
weigh less than 110 grams. The package utilizes rugged
ceramic feed-through copper core pins and is sealed using
parallel seam welding.
Manufactured in a facility fully qualified to MIL-PRF-38534,
these converters are fabricated utilizing DLA Land and
Maritime qualified processes. For available screening
options, refer to device screening table in the data sheet.
Non-flight versions of the M3GB-Series converters are
available for system development purposes. Variations in
electrical specifications and screening to meet custom
requirements can be accommodated.
The M3BG-Series converters utilize a single-ended
forward topology with resonant reset. The nominal
switching frequency is 500kHz. Electrical isolation and
tight output regulation are achieved through the use of a
magnetically coupled feedback. Voltage feed-forward with
duty factor limiting provides high line rejection and
protection against output over voltage in the event of an
internal control loop failure. This mechanism limits the
maximum output voltage to approximately 30% over the
nominal regardless of the line voltage.
An internal EMI filter reduces the conducted emissions to
less than 5mA rms on the input power leads. A two-stage
output filter reduces the typical output ripple to less than
20mV peak-to-peak.
Output current is limited under any load fault condition to
approximately 125% of rated. An overload condition
causes the converter output to behave like a constant
current source with the output voltage dropping below
nominal. The converter will resume normal operation
when the load current is reduced below the current limit
point. This protects the converter from both overload and
short circuit conditions.
An under-voltage lockout circuit prohibits the converter
from operating when the line voltage is too low to maintain
the output voltage. The converter will not start until the line
voltage rises to approximately 85 volts and will shut down
when the input voltage drops below 81 volts. The four
volts of hysteresis reduces the possibility of line noise
interfering with the converter’s start-up and shut down.
An external inhibit port is provided to control converter
operation. The nominal threshold relative to the input
return (pin 2) is 1.4V. If 2.0 volts or greater are applied to
the Inhibit pin (pin 3) then the converter will operate
normally. A voltage of 0.8V or less will cause the
converter to shut-down. The pin may be left open for
normal operation and has a nominal open circuit voltage
of 4.0V.
Synchronization input and output allow multiple
converters to operate at a common switching frequency.
Converters can be synchronized to one another or to an
externally provided clock. This can be used to eliminate
beat frequency noise or to avoid creating noise at certain
frequencies for sensitive systems.
Remote sense is provided on the single output models to
compensate for voltage drops in the interconnects
between the converter and the load. The output voltage
of dual output models can be adjusted by a single
external resistor.
|
M3GB 、 M3GB12003R3S 、 M3GB12005S 、 M3GB12012S 、 M3GB12015S 、 M3GB12028S 、 M3GB12005D 、 M3GB12012D 、 M3GB12015D 、 M3GB12005SX/XX 、 M3G-Series 、 M3GB-SERIES 、 M3GB12005S /XXX |
|
|
[ Geostationary Earth Orbit Satellites (GEO) ][ Deep Space Satellites / Probes ][ Strategic Weapons and Communication System ] |
|
|
Datasheet |
|
|
MIL-STD-1547 、 MIL-STD-883 、 MIL-STD-975 |
|
Please see the document for details |
|
|
|
|
|
MIL-PRF-38534 |
|
|
|
|
|
English Chinese Chinese and English Japanese |
|
|
2018-08-09 |
|
|
|
|
|
PD-97908 |
|
|
653 KB |
- +1 Like
- Add to Favorites
Recommend
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
