IRF MAH10005050812QEQM High reliability radiation hardened quad output dc-dc converter Datasheet

PD-97814
HIGH RELIABILITY
RADIATION HARDENED
QUAD OUTPUT
DC-DC CONVERTER
MAH-SERIES
Nominal Voltage Input, Quad Output
Description
The MAH-Series of isolated DC-DC converters for space
applications are low to medium power radiation
hardened high reliability devices designed for hostile
radiation environments such as those encountered by
geostationary earth orbit satellites, deep space probes
and communication systems. Features include small
size, high efficiency, low weight, and a good tolerance
to total ionizing dose, single event effects, and
environmental stresses such as temperature extremes,
mechanical shock, and vibration. All components are
fully derated to meet the requirements of EEE-INST002 (NASA) and ECSS-Q-ST-30-11 (ESA). Extensive
documentation including worst case analysis, radiation
susceptibility, thermal analysis, stress analysis, and
reliability analysis are available.
The MAH-Series converter has four outputs – three
positive and one negative - each is independently
regulated via linear post regulators. The outputs are
sequenced during turn-on and turn-off such that the
negative output comes up first at turn-on and stays up at
turn-off until the positive outputs have decreased. The
MAH-Series converters incorporate a fixed frequency
flyback power converter and internal EMI filter that meets
the requirements for most major satellite power buses.
The converter includes input under voltage shut-down
functionality.
Due to the linear post regulation of the outputs, the MAHSeries is well suited for use in RF-applications where
low noise, high output voltage accuracy, and high CS
attenuation is required.
Each converter is provided as a complete board
assembly for installation into the host equipment chassis.
The board is conformal coated (except for mating
surfaces) and is mounted in the host chassis using
screws. The board outline is L x W x H: (85mm x 71mm
x 18mm). The weight is less than 90 grams.
Non-flight versions of the MAH-Series converters are
available for system development purposes. Variations
in electrical specifications and screening to meet custom
requirements can be accommodated
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Features
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Total Dose > 100 krad(Si)
SEE > 82 MeV.cm2/mg
Low Weight < 90 grams
DC Input Ranges can be accommodated
within an Overall Range from 20V to 100V
O/P 1: +5.0V (up to 630mA)
O/P 2: +5.0V (up to 530mA)
O/P 3: -8.0V (up to 40mA)
O/P 4: +12V (up to 60mA)
Output Ripple: < 1mVrms (100Hz - 50MHz)
CS Rejection Input to Outputs: > 90dB
(50Hz - 1.0MHz)
10MΩ @ 100VDC Isolation
Input Under-Voltage Protection
Meets Conducted Emission Requirements of
Major Power Buses:
100Hz - 100kHz: 80dBuArms
100kHz - 10MHz: -20dB/decade
10MHz - 50MHz: 40dBuArms
Short Circuit and Overload Protection
Meets Derating Requirements of EEE-INST
002 and ECSS-Q-ST-30-11
Isolated On/Off Control via High Level Pulse
Command (Latching Relay)
On/Off Status Telemetry (Relay Contact Type)
Output Status Telemetry (Bi-Level)
Temperature Telemetry (Thermistor)
Workmanship Per IPC-A610 Class 3
Board is Coated with ARATHANE-5750
Applications
n
Low to Medium Power RF Systems (like
Receivers, Beakons, Frequency Up and
Down Converters) On-board Satellites
1
10/25/13
MAH-SERIES
(Nominal Voltage Input, Quad Output)
Circuit Description
Primary
Power
Bus
Fig 1- Block Diagram
UVP sense
Low
Voltage
Supply
Int.Supply
Latching
Relay
On/Off
Status TM
V1
Rectifier
Hold-Up
Capacitors
COMMON
Linear
Regulator
Output
Status
Telemetry
OFF
TC ON
TC OFF
Rectifier
&
Filter
Input Filter
Rectifier
&
Filter
Linear
Regulator
Rectifier
&
Filter
Linear
Regulator
O/P TM
V2
ON
Fly-Back
Trans former
V4
Enable
UVP sense
UVP
Monitor &
Latch
Disable
PWM
Controller
Int. Supply
Status
Detection
Fly-Back
Power
Switch
Sequen cing
POK
Temperature
Telemetry
Temp.
TM
Thermistor
Current
Shunt
Rectifier
&
Filter
Hold Up
Capacitor
Bank
Negative
Linear
Regulator
V3
Electrical Design Description
General
Output power is limited under any load fault condition to approximately 120% of rated output (For output 4
approximately 150%). An overload condition on positive outputs 2 and 4 causes the converter output to
behave like a constant current source with the output voltage dropping below nominal. An overload condition
at the negative output causes the positive outputs to shut-down in order to protect RF-transistors in the load.
An overload on the positive output 1 result in hick-up operation of the positive outputs but sequencing with
the negative output is respected. The converter will resume normal operation when the load current is
reduced below the current limit point.
An under-voltage protection circuit prohibits the converter from operating when the line voltage is too low
for safe operation. In case of an under voltage event the converter will not start when the input voltage
returns to its nominal level before an Off-command followed by an On-command has been issued.
The isolated On/Off telecommand is made with a latching relay and is intended for use with a 12V or 26V
pulse command.
Input Filter
The converter is supplied from the primary bus through an input filter. The input filter selected is a second
order resistively damped filter. The filter is chosen in order to provide sufficient damping of the ripple current
towards the bus and the ripple voltage towards the converter.
As baseline for the filter dimensioning CE limit at 80dBuArms up to 100kHz decreasing to 40dBuArms at
10MHz, continuing at 40dB above 10MHz has been used. The input filter capacitors are non-redundant
ceramic capacitors. The input bus is not protected from S/C faults from the primary side in the converter protection element assumed implemented upstream the DC-DC converter. The bus is protected from failures
on the secondary side by a primary current limiter and over current protection in the linear post regulators.
Due to the overload protection on the outputs, failure propagation from the output to the input bus, through
the converter, is not possible.
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MAH-SERIES
(Nominal Voltage Input, Quad Output)
The interface circuit for the input filter is given in the diagram shown in Fig. 2.
Fig 2 - Inerface Schematic for Input Filter
-
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L1
L2
L3
R1
CR2
C1
CR1
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WR)O\EDFN &RQYHUWHU
C5
6WDUWXS&LUFXLWU\
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C4
R4
C9
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C7
Fly-Back Converter
The fly-back converter supplying all the outputs is built up around a standard UC1845A PWM controller.
The switching element is a radiation hardened MOSFET from International Rectifier in TO-39 package. The
main transformer is a standard RM6 core.
When the converter is commanded On and is up and running it supplies itself from an extra winding on the
power transformer in order to maintain a reasonable efficiency. The converter operates in current mode
control; hence it includes inherently a primary current regulation and primary current limitation. Regulation
is performed on the internal auxiliary supplying the PWM controller. The fly-back provides four outputs for
supplying the functional outputs for the DC-DC. Each output uses diode rectification and is filtered by use of
solid tantalum capacitors. Outputs 1 & 2 have an option for a Π filter at the inner side of the linear regulator
and output 1 has also this option at the outside side of the linear regulator. This is to ensure that the
converter ripple is removed to the maximum extent possible before entering the noise sensitive areas of the
RF-Equipment.
The switching frequency is fixed and in the range 80kHz to 160kHz depending on the specific version of the
MAH-Series.
TC, TC Status, Primary Under-Voltage and Start-up
The DC-DC includes a galvanic isolated telecommand interface. The interface is made with a latching relay
in a T0-5 package. Free-wheeling diodes are implemented across the On and Off coil to protect from
inductive kick-back. The relay controls On/Off switching of the converter by controlling the PWM controller
supply voltage. The relay switches only the PWM controller supply voltage (approximately 15V). The relay
contacts do therefore not see the full bus voltage.
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3
MAH-SERIES
(Nominal Voltage Input, Quad Output)
The interface circuit for the On/Off relay circuit is given in in Fig 3.
Fig 3 - Interface Schematic for Telecommand Interface with On/Off Status Telementry
-
TC On return
TC On
TC Off
TC Off return
Status TM
Status TM Return
ON
O FF
The telemetry is provided as an On/Off status telemetry, this telemetry is provided as an extra set of contacts
on the relay. When the DC-DC converter is commanded Off the relay contacts will be open circuit offering
more than 10Mohm resistance and when the DC-DC is commanded On the contacts will be closed presenting
a low well-defined resistance. Series diodes are included as an option in the design to ensure compliance
to most satellite TM/TC subsystems.
The input UVP circuit senses the bus voltage and compares it to the input UVP-threshold. If the input voltage
is below the limit, the circuit gives shut down signal to the PWM.
The UVP shut down function can be configured to be either latching or with automatic re-start. This
configuration is set by manufacturer (not user changeable after product delivery). In case of latching UVP in
the event of an UVP, the DC-DC will continue to be Off when the input bus returns to its normal range; the
trip condition is reset by issuing an Off command followed by an On-command. The UVP trig level includes
hysteresis for proper operation.
Linear Regulators
Linear post regulators are used for the outputs to comply with the strict requirements for voltage precision,
noise, ripple, and CS rejection.
The linear post regulator is under normal load conditions operating in voltage mode with a high control BW.
In case of an overload condition the current control loop will take over providing a constant current limitation.
Both the voltage and the current loop are based on discrete components, a standard quad Op-amp (two
amplifiers per linear regulator) and bipolar junction transistors as pass elements.
Output 1 (high current) and the low current output (output 4) has been realized slightly different compared
to outputs 2 and 3. For the low current output the current limit is achieved by using a transistor to clamp the
current this method is less accurate but as this output only carries 30mA this inaccurate current limit can be
thermally controlled.
For output 1 with up to 1.5A output current the serial pass element is a MOSFET (IRHF57034) in order to limit
the voltage drop at the high output current. The voltage loop is built around an op-amp. This regulator does
not include current limitation instead the current limiter is provided by the current limit of the flyback by the
PWM used to control the flyback. The current limit will be constant down to a certain output voltage level
where the flyback will start to enter a hick-up mode. Output sequencing is maintained also in case of
overload for output 1. All other outputs will have a constant current limitation.
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MAH-SERIES
(Nominal Voltage Input, Quad Output)
With careful design of the control circuits and board layout a very high CS attenuation for the combination
of fly-back converter and linear regulators is achieved, typically >100dB. The linear regulators also provide
high attenuation of the ripple from the fly-back converter giving a low output CE (typically < 0.25mVrms) at
the switching frequency. This is obtained even with headroom <1V, hereby a reasonable efficiency for the
overall converter can be offered. The linear regulators also ensure very high output accuracy better than
±2% at worst case EOL conditions including initial setting, line- and load regulation, temperature variations,
ageing, and radiation degradation.
Output Telemetry
A Bi-level status telemetry can be derived from either output 1 or output 2. Implementation is using a voltage
divider with filtering directly from the positive output selected (selection by manufacturer – not user selectable
after delivery).
Fig 4 - Interface Schematic for Output Status Telementry
-
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2XWSXW 6W DWXV
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2XW SXW6WDW XV
7HOHPHW U\UHW XUQ
Temperature Telemetry
A thermistor is included in the design to provide temperature telemetry.
Fig 5 - Interface Schematic for the Temperature Telementry
-
Thermistor YSI 44907
7HPSHUDWXUH
WHOHPHWU\
7HPSHUDWXUH
WHOHPHWU\UHWXUQ
Timing / Sequencing
The linear regulators provide most of the architecture needed to provide timing between the outputs.
At turn On the negative output will come up first. When the negative output is present and in regulation
it releases the positive outputs which hereafter slowly rises. At turn OFF the positive outputs will
stop when the fly-back converter stops, and a small hold up circuit on the negative output ensures
that the negative output keeps running after the positive outputs have been discharged by the load.
Also if the negative output is shorted the positive outputs will immediately be stopped. All done to
ensure safe operation of the RF-electronics which often includes normally-on devices that requires
presence of negative bias prior to applying positive voltages.
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5
MAH-SERIES
(Nominal Voltage Input, Quad Output)
Mechanical Design
The DC-DC is considered a module forming part of the complete host equipment. The DC-DC is ‘open
board’ ready for installation into the host equipment housing.
The DC-DC is delivered complete with input connections formed as solder pins and output solder terminals
ready for installation with screws into the host equipment housing. The board is equipped with 8 mounting
holes for M2 screws that serve as mechanical fixation, thermal path, and electrical return connection. The
screw positions are hence a result of the mechanical design as well as the thermal analysis and EMC
considerations.
The outline of the board is (L x W x H): 85mm x 71mm x 18mm. The mass is less than 90g.
The input bus voltage, telecommand, and status telemetry is provided by 15 wrap around pins supported by
a plastic socket. The input pin section is placed in a grid similar to a D-Sub connector thus it is possible to
offer a solution with a 15P D-SUB connector for the input power and TM/TC signals (in which case the mass
increases 15g).
The output pins are provided using solder pads. The output pad section contains 8 pads allowing access to
the outputs from both sides of the board.
The DC-DC converter is conformal coated (except on mating surfaces).
Vibrational Performance
In order to limit the PCB deflections which are critical with respect to fatigue failures of component leads, the
basic Eigen frequency is approximately 1150Hz.
The component mechanical mounting techniques are based upon standards used for similar equipment.
Components with need of mechanical support with no natural mounting possibility (axial capacitors, BR40
Capacitors, RM cores etc.) are supported with a two-component epoxy glue (EC2216).
The construction does not include individual components with very high mass hence a distributed fixation
of the PCB into the mechanical housing with M2x5 steel screws is satisfactory.
Thermal Design
The DC-DC converter will keep temperature derating as per EEE-INST-002 and ECSS-Q-ST-30-11 up to an
interface temperature at the mounting points of +75°C.
In order to respect the required component temperatures, a good thermal conductive path is required from
the PCB and to the host equipment. This is achieved by a number of screw connections – one additional
screw (compared to the need for mechanical fixing and ground connection) are placed at a critical component
location.
Critical components are placed close to the mounting screws of the PCB. The PCB is provided with eight
copper layers which, besides establishing the electrical connections, are used also for heat transfer.
Additionally, plated through holes (0.5mm diameter) are used for establishing a heat path from the PCB
component side to the solder side where needed.
Standard component mounting techniques considering the thermal constraints are used.
6
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MAH-SERIES
(Nominal Voltage Input, Quad Output)
Design Methodology
The MAH-Series is developed using a proven conservative design methodology, which includes selecting
radiation tolerant, and established reliability components and fully derating to the requirements of EEE-INST002 and ECSS-Q-ST-11. In addition to verification and qualification testing and full acceptance testing for
deliverable units, the performance characteristics are verified by theoretical analysis including worst case
analysis including radiation degradation, parts stress analysis, mechanical analysis and thermal analysis.
Reliability Assessment per MIL-HDBK-217F has also been carried out.
Declared Parts Lists defining the EEE parts technical standard and Declared Materials Lists with material
data including outgassing and surface treatment is part of the design standard.
Generic Envelope Data Sheet & Existing Models Listings
The MAH-Series is made as a generic design allowing for adaptations to different satellite power buses and
TM/TC systems, different output voltages and currents within the overall envelope specification defined for
the ML-Series.
For each released variant of the MAH-Series detailed data sheet exists with exact data for all parameters.
Existing variants are listed in Table below.
A generic envelope data sheet is presented to indicate the envelope specification within which the MAHSeries can be adapted to specific customer requirements that cannot be met with one of the existing model
variants listed in Table below.
Where the generic data sheet lists Min rated or Max rated value, it is necessary to look up the actual
parameter in the data sheet for the specific variant in question – for new variants please contact IR HiRel
Sales department.
MAH-Series Product Variant Input Voltage
MAH34101505Q
Outputs
34V
+5.1V, 1,200mA
(32-37.5V)
+10.2V, 320mA
Data Sheet No. Product Status
TBD
Active
TBD
Active
TBD
Active
TBD
Active
TBD
Active
-5.0V, 30mA
+15V, 10mA
MAH501509R205Q
50V
+5.1V, 1,500mA
(49.2-50.5V)
+9.2V, 250mA
-5.0V, 35mA
+15V, 10mA
MAH5009R21505R106Q
50V
+5.1V, 1,600mA
(49.2 – 50.5V)
+9.2V, 220mA
-6.0V, 40mA
+15V, 30mA
MAH10005R210155R4Q
100V
+5.2V, 1,700mA
(97-101V)
+10.1V, 250mA
-5.4V, 50mA
+15V, 30mA
MAH10010R11505Q
100V
+10.1V, 850mA
(97-101V)
+5.1V, 850mA
-5.4V, 50mA
+15V, 30mA
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7
MAH-SERIES
(Nominal Voltage Input, Quad Output)
Generic Envelope Data Sheet & Existing Models Listings (Continued)
MAH-Series Product Variant Input Voltage
MAH50101505R206Q
Outputs
50V
+5.2V, 1,700mA
(45-50.5V)
+10.1V, 220mA
Data Sheet No. Product Status
TBD
Active
TBD
Active
TBD
Active
TBD
Active
TBD
Active
TBD
Active
TBD
Active
TBD
Active
-6.0V, 65mA
+15V, 30mA
MAH50101505R205R4Q
50V
+10.1V, 850mA
(45-50.5V)
+5.1V, 925mA
-5.4V, 50mA
+15V, 30mA
MAH70101505R206Q
70V
+5.2V, 1,700mA
(68-71V)
+10.1V, 220mA
-6.0V, 65mA
+15V, 30mA
MAH100101505R206Q
100V
+5.2V, 1,700mA
(98-101V)
+10.1V, 220mA
-6.0V, 65mA
+15V, 30mA
MAH341206D
MAH100061205T
34V
+6V, 820mA
(33-37V)
+12V, 430mA
100V
+6V, 1,550mA
(97-103V)
+12V, 50mA
100V
+5V, 1,008mA
(95-105V)
+9V, 132mA
-5V, 50mA
MAH1000905T
-5V, 312mA
MAH10009050522Q
100V
+5V, 587mA
(97-103V)
+9V, 1,078mA
-7V, 101mA
+22V, 10mA
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MAH-SERIES
(Nominal Voltage Input, Quad Output)
Specifications
Absolute Maximum Ratings
Input voltage range
Output power
Operating mounting point
temperature (Note 10)
Storage temperature
Recommended Operating Conditions
-0.5Vdc to +Max rated Input voltage range (Note 9)
Internally limited
Output power
-55°C to +100°C
Operating mounting point
temperature (Note 10)
-55°C to +125°C
Cold start temperature (Note 9)
+Min rated to +Max rated
0 to Max. Rated
-40°C to +75°C *
-55°C
* Meets full derating
Electrical Performance Characteristics (Generic)
Conditions
Limits
-40°C ≤ TC ≤ +75°C
VIN = VNOM DC ± 5%, CL = 0
Parameter
Condition
unless otherwise specified
Primary Input Voltage
Min.
Nom.
Max.
Min rated Nominal Max rated
Output Voltage ( VOUT )
Unit
V
Note 1
( Each Output )
0% ≤ IOUT ≤ 100% rated load
+V1
1
99.5
100
100.5
+V2
1
99.5
100
100.5
-V3
1
99.5
100
100.5
+V4
1
99.5
100
100.5
+V1
2
0% ≤ IOUT ≤ 100% rated load
99.0
101.0
+V2
2
99.0
101.0
-V3
2
99.0
101.0
+V4
2
99.0
101.0
+V1
3
98.0
102.0
+V2
3
98.0
102.0
-V3
3
98.0
102.0
+V4
3
98.0
102.0
0% ≤ IOUT ≤ 100% rated load
%
%
%
Output Power ( POUT )
( Each Output )
+V1
1,2,3
VIN = Min rated, Nominal, Max rated
8.0
+V2
Either Output
5.0
-V3
Total output power for all
1.5
+V4
outputs limited to 13W
0.5
W
Output Current ( IOUT )
( Each Output )
+V1
+V2
1,2,3
VIN = Min rated, Nominal, Max rated
0
1,700
Either Output, Note X (??)
0
850
0
0
300
-V3
+V4
mA
30
For Notes to Specifications, refer to page 12
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9
MAH-SERIES
(Nominal Voltage Input, Quad Output)
Electrical Performance Characteristics (Generic) (Continued)
Conditions
Parameter
Line Regulation ( VRLINE )
Condition
1,2,3
( Each Output )
Load Regulation ( VRLOAD )
-40°C ≤ TC ≤ +75°C
VIN = VNOM DC ± 5%, CL = 0
unless otherwise specified
( Each Output )
Cross Regulation (VRCROSS)
Input Current
1,2,3
Nom.
Max.
Unit
-1.0
1.0
mV
-1.0
1.0
mV
1.0
mV
VIN = Min rated, Nominal, Max rated
IOUT = 10%, 50%, 100% rated
1,2,3
Min.
VIN = Min rated, Nominal, Max rated
IOUT = 10%, 50%, 100% rated
1,2,3
Limits
VIN = Min rated, Nominal, Max rated
Note 1
10
IOUT = 0, Commanded On
Commanded Off
Switching Frequency ( FS )
1,2,3
Notes 1, 7
1,2,3
0% ≤ IOUT ≤ 100% rated load
15
2.0
Min rated Nominal Max rated
mA
kHz
Input Under-Voltage
Trig Level
Turn-on Delay
Min rated
Max rated
Output 3 to Output 1, 2, 4
2.0
12
Turn-off Delay
Output 1-2-4 to Output 3
1.0
8.0
Output Ripple ( VRIP )
1,2,3
VIN = Min rated, Nominal, Max rated
1
Frequency Domain 100Hz - 50MHz
1.0
Note 1
1.0
+V2
-V3
1.0
+V4
1.0
+V1
ms
IOUT = 100% rated load
( Each Output )
+V1
V
IOUT > 20% for Output 1, 2, 4
Output Sequencing
1,2
Time Domain 100Hz - 50MHz
Max rated
Notes 1, 2
Max rated
+V2
-V3
Max rated
+V4
Max rated
mVRMS
mVPP
Efficiency ( EFF )
For combined Output Power
of no greater than
20% of PMAX
50% of PMAX
1,2,3
100% of PMAX
IOUT = 20% rated load
Min rated
IOUT = 50% rated load
Min rated
IOUT = 100% rated load
Min rated
%
Telecommand I/F
Pulse Voltage High
Nominal 26V Type
1,2,3
+22
+30
Nominal 12V Type
Note 1
+12
+17
V
V
Pulse Voltage Low
-40
0.5
V
Pulse Duration
10
1000
ms
For Notes to Specifications, refer to page 12
10
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MAH-SERIES
(Nominal Voltage Input, Quad Output)
Electrical Performance Characteristics (Generic) (Continued)
Conditions
Limits
-40°C ≤ TC ≤ +75°C
VIN = VNOM DC ± 5%, CL = 0
Parameter
Condition
unless otherwise specified
Min.
Nom.
Max.
Unit
Telemetry
Converter On
1,2,3
Min rated
Converter Off
Max rated
Ω
MΩ
1.0
Current Limit Point
( Each Output )
+V1
1,2,3
VOUT = 100mV below Nominal
Min rated
Max rated
+V2
Min rated
Max rated
-V3
Min rated
Max rated
+V4
Min rated
Max rated
20% To/From Full Load
Min rated
Max rated
Note 3
Min rated
Max rated
-V3
Min rated
Max rated
+V4
Min rated
Max rated
mA
Output Response to
Step Load changes ( VTLD )
+V1
1,2,3
+V2
mVPK
Recovery Time
Step Load changes ( TTLD )
+V1
1,2,3
20% To/From Full Load
2.5
Notes 3, 4
2.5
+V2
-V3
2.5
+V4
2.5
ms
Turn-on Response
10% Load, Full Load
Overshoot ( VOS)
+V1
1,2,3
% of nominal output voltage
105
Note 5
105
+V2
-V3
105
+V4
105
Turn-on Delay ( TDLY )
Capacitive Load ( CL )
+V1
2.0
1,2,3
10
IOUT = 100% rated load
Max rated
+V2
No effect on DC performance
Max rated
-V3
Notes 1, 6
Max rated
+V4
Each Output
Max rated
%
ms
µF
For Notes to Specifications, refer to page 12
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11
MAH-SERIES
(Nominal Voltage Input, Quad Output)
Electrical Performance Characteristics (Generic) (Continued)
Conditions
Parameter
Condition
Limits
Min.
Nom.
90
100
Max.
Unit
IOUT = 100% rated load
EMC conducted
susceptibility (Line Rejection)
-40°C ≤ TC ≤ +75°C
VIN = VNOM DC ± 5%, CL = 0
unless otherwise specified
1
Primary power sine wave injection of
dB
2VP-P, 100Hz to 1.0MHz, Note 1
IOUT = 100% rated load
Electromagnetic Interference
(EMI), Conducted Emission
1
Notes 1, 7
Limits per Fig. 2
(CE)
Isolation
1
Input to Output, any potential to
10
MΩ
telecommand input and any potential
to telemetry output, test @ 100VDC
Device Weight
Failure Rate
MIL-HDBK-217F2, SF, 35°C, Note 8
90
g
100
FITs
Notes: Specification and Electrical Performance Characteristics Tables
1.
Parameter is tested as part of design characterization or after design changes. Thereafter, parameter shall
be guaranteed to the limits specified.
2. Guaranteed for a D.C. to 50MHz bandwidth. Tested using a 10.7 MHz bandwidth.
3. Load step transition time ≥ 10 µs.
4. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of
its steady state value.
5. Turn-on delay time from application of telecommand pulse to the point where Output 2 = 98% of nominal
output voltage.
6. Capacitive load may be any value from 0 to the maximum limit without compromising the output sequencing
performance. A capacitive load in excess of the maximum limit may influence the output sequencing
performance and start-up time, converter operation and dc performance will remain intact.
7. The switching frequency and 1st and 2nd harmonic of the input ripple is tested on every unit.
8. MIL-HDBK-217F2 stress-dependent method is used with 2 exceptions: For soldering a fixed failure rate at
0.035FIT is used and for power MOSFETs the dissipated power (instead of rated power) is used for the Pr
parameter. 1 FIT is 1 failure in 109 hours.
9. The converter meets full derating per EEE-INST-002 and ECSS-Q-30-11 with the following exception: For
Schottky diode JANS1N5819 a maximum derated junction temperature of +110°C. For EEE-INST-002 it is
required that ceramic capacitors with a voltage stress below 10V shall be rated for minimum 100V - in the
product such capacitors is rated for 50V minimum.
10. Although operation temperatures between -55°C to +100°C and -40°C to+75°C is guaranteed, no
parameter limits are specified.
Electrical Performance Characteristics - Definition of Conditions
Condition Definition
1
2
3
12
Comment
BOL @ +25°C interface temperature
Initial setting
BOL @ -40°C to +75°C interface temperature Initial setting and worst case temperature variation
EOL @ -40°C to +75°C interface temperature Worst case performance including initial setting,
temperature variation, aging and radiation degradation
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MAH-SERIES
(Nominal Voltage Input, Quad Output)
Grounding and Isolation Scheme
Parameter
Grounding & Isolation performance
Isolation:
prim. to secondary:
Telecommand:
TC Status TM:
O/P Status TM:
Temperature TM:
>10Mohm // < 50nF
Floating
Floating
Referenced to secondary return
Floating
Grounding:
Secondary Return bound to chassis via multiple screw connections.
Model Definition and Test Plans
Model Definition
Model
Description
Build Standard
EBB
The EBB is an electrical
representative model.
The PCB will be had soldered by the engineering group (certified
operator). No staking and conformal coating is foreseen.
Preferably same type of EEE parts as intended for flight, but lower grade
will be used for convenience. For resistors and capacitors different
types with same basic characteristics may be used
The EBB is intended to be
used by customers in their
proto type at equipment level.
EBB models are built at IR’s
Danish Design Center.
EQM
The EQM is an electrical and
mechanical representative
model.
The EQM is intended to be
used by customer in their EQM
at equipment level.
Flight standard for processes.
Same type of EEE parts as intended for flight, but lower grade may be
used for convenience.
FM
Flight standard models.
Full flight standard
Test Plan - EBB
The EBB must pass the following tests:
Test No.
Type of Test
Location* Remarks
1
Electrical performance test,
room temperature incl. Limited
EMC test (CE 50kHz-1MHz)
IRD
Acceptance Test Procedure
2
Electrical performance test in
temperature (Q-level)
IRD
Acceptance Test Procedure
3
Electrical performance test,
room temperature incl. Limited
EMC test (CE 50kHz-1MHz)
IRD
Acceptance Test Procedure
4
Final Inspection
IRD
General inspection Procedure
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13
MAH-SERIES
(Nominal Voltage Input, Quad Output)
Test Plan - EQM
The EQM must pass the following tests:
Test No.
Type of Test
Location*
Remarks
1
Electrical performance test, room
temperature incl. Limited EMC test
(CE 50kHz-1MHz)
IRSJ
Acceptance Test Procedure
2
Thermal cycling with electrical
monitoring of input and outputs
(Q-level)
IRSJ
Acceptance Test Procedure
10 cycles
3
Electrical performance test in
temperature (Q-level)
IRSJ
Acceptance Test Procedure
4
Random Vibration test in
(Q-level)
External
test house
Vibration Test Procedure
5
Electrical performance test, room
temperature incl. Limited EMC test
(CE 50kHz-1MHz)
IRSJ
Acceptance Test Procedure
6
Mechanical Measurements
IRSJ
Acceptance Test Procedure
7
Final Inspection
IRSJ
General inspection Procedure
Test Plan - FM
The FM must pass the following tests:
Test No.
Type of Test
Location*
Remarks
1
Electrical performance test, room
temperature incl. Limited EMC test
(CE 50kHz-1MHz)
IRSJ
Acceptance test procedure
2
Electrical performance
temperature (A-levels)
in
IRSJ
Acceptance test procedure
3
Electrical performance test, room
temperature incl. Limited EMC test
(CE 50kHz-1MHz)
IRSJ
Acceptance test procedure
4
Electrical performance test, room
temperature
IRSJ
Acceptance Test Procedure
5
Mechanical Measurements
IRSJ
Acceptance test procedure
6
Final Inspection
IRSJ
General inspection procedure
test
Note:
Location* - IRD: IR’s Danish Design Center, Skovlunde, Denmark
- IRSJ: IR’s Site in San Jose, California, USA
14
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MAH-SERIES
(Nominal Voltage Input, Quad Output)
Radiation Performance
TID
The TID radiation performance is guaranteed by worst case analysis with radiation degradation data for
each radiation sensitive component used in the DC-DC converter. For TID radiation verification testing
(RVT) for each wafer lot for all sensitive components is part of the EEE parts requirements per table below.
TID RVT Plan Table
Component Type
RVT Plan (applicable to all flight lots)
JANS2N2222A
LDRS 0.01 to 0.1 rad/s up to 200kRad per IR RVT plan
JANS2N2907A
LDRS 0.01 to 0.1 rad/s up to 200kRad per IR RVT plan
JANS2N5153
LDRS 0.01 to 0.1 rad/s up to 200kRad per IR RVT plan
JANS2N5154
LDRS 0.01 to 0.1 rad/s up to 200kRad per IR RVT plan
JANSR2N7492T2
RVT by Manufacturer (HDR)
IRHF57214SESCS
RVT by Manufacturer (HDR)
JANSR2N7616UB
RVT by Manufacturer (HDR)
JANSR2N7626UB
RVT by Manufacturer (HDR)
LM124AWR
RVT by Manufacturer (ELDRS)
IS2-1009RH
RVT by Manufacturer (HDR)
LDRS 0.01 to 0.1 rad/s up to 100kRad per IR RVT plan
UC1845A
LDRS 0.01 to 0.1 rad/s up to 100kRad per IR RVT plan
SEE
The SEE radiation performance is guaranteed by a combination of derating and mitigation at circuit level.
For mitigation at circuit level both theoretical analysis and testing with imposed SEE effects are performed.
The applicable SEE and mitigation concept is presented in table below.
The maximum output perturbation is 5% of the nominal output voltage during any SEE.
Component Type
Applicable SEE
Mitigation Concept
RH MOSFET
SEGR
Vds derating in combination with SEE SOA
curves from manufacturer data sheet
Op-Amp
SET, 15us perturbation to rail
Mitigation at circuit level (filtering)
Voltage reference
SET, 10us perturbation to rail
Mitigation at circuit level (filtering)
PWM
SET, 15us perturbation to rail
Mitigation at circuit level (filtering)
Double Pulses
Mitigation at circuit level (filtering, no
saturation of magnetic parts)
Missing Pulses
Mitigation at circuit level (filtering, no
saturation of magnetic parts)
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15
MAH-SERIES
(Nominal Voltage Input, Quad Output)
EEE Parts Technical Standard
Component Screening
Component
Class
Component Type
Specification
Quality / Screening
Level (minimum)
Capacitors
BR40
ESCC 3001/030
ESCC Level B
CDR31-34 BP
MIL-PRF-55681
MIL-S
CDR31-34BX
MIL-PRF-55681
MIL-S
CWR29
MIL-PRF-55365
Weibull C, surge current
option B
Diodes
1N6640US
MIL-PRF-19500/609
JANS
1N5806US
MIL-PRF-19500/477
JANS
1N5819UR-1
MIL-PRF-19500/586
JANS
Relays
J422-26M Shock resistant
TR-HiRel-1/422
See Note 1
Inductors
MPP toroids product specific
MIL-STD-981
See Note 2
Ferrite toroids product specific
MIL-STD-981
See Note 2
Bipolar Junction
2N2222A
MIL-PRF-19500/255
JANS
Transistors
2N2907A
MIL-PRF-19500/291
JANS
2N5153
MIL-PRF-19500/545
JANS
2N5154
MIL-PRF-19500/544
JANS
Power MOSFET
Resistors
IRHLUB770Z4
MIL-PRF-19500/744
JANS
IRHLUB7970Z4
MIL-PRF-19500/745
JANS
IRHF57034
MIL-PRF-19500/703
JANS
IRHF57214SE
MIL-PRF-19500/703
JANS
RM1005B
MIL-PRF-55342
MIL-R
RM1206B
MIL-PRF-55342
MIL-R
RWR81
MIL-PRF-39007
MIL-S
Transformers
Ferrite RM6, product specific
MIL-STD-981
See Note 2
ICs
IS2-1009
MIL-PRF-38535
QML V
LM124A
MIL-PRF-38535
QML V
UC1845A
MIL-PRF-38535
QML V
1N4105UR-1
MIL-PRF-19500/435
JANS
1N4109UR-1
MIL-PRF-19500/435
JANS
1N4110UR-1
MIL-PRF-19500/435
JANS
Zeners
Notes:
1. Screening as per MIL-PRF- 9016 with additional screening as per Teledyne test specification 0-40-837 rev B
2. Custom magnetics (chokes and transformers) screening is as per MIL-STD-981 with exception for:
Radiographic inspection, monitoring during last thermal shock cycle, power burn-in
16
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MAH-SERIES
(Nominal Voltage Input, Quad Output)
DPA Rules
Component
Class
Component Type
Specification
Capacitors
Ceramic, solid tantalum
3 pcs / value /datecode
Quality / Screening
Level (minimum)
Diodes
QPL-listed
3 pcs / datecode
No precap CSI
IC’s
QPL-listed
3 pcs / datecode
No precap CSI
Relays
3 pcs / datecode
Resistors
None
Transistors
QPL-listed
3 pcs / datecode
No precap CSI
Non-QPL
3 pcs / datecode
Precap CSI
(except for IR MOSFETs,
tested to be SCS parts)
Pin Designation Tables
Input Terminals Assignment List
Output Terminals Assignment List
Indent: Input Terminals (Solder, Pins, Straight)
Indent:Output Terminals (Solder, Pins, Straight)
Pin #
Pin #
Function
Pin #
Function
1
Main Bus Return
101
V1 (Positive)
Main Bus Return
102
V1 Return
TM Temp
103
V4 (Positive)
TM Temp Return
104
V4 Return
3
Main Bus
105
Voltage Telemetry
Main Bus
106
Voltage Telemetry Return
4
Chasis (Ground)
107
V3 Return
TM Voltage
108
V3 (Negative)
Chasis (Ground)
109
V2 Return
TC ON Return
110
V2 (Positive)
9
2
10
11
12
5
13
6
14
TC OFF Return
7
TC OFF
8
TM Status Return
15
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TC ON
TM Status
17
MAH-SERIES
(Nominal Voltage Input, Quad Output)
Recommended Mounting Stud Design
It is foreseen with a mounting stud design with circular mounting studs made out of aluminum with a
diameter of 4.0mm and a treaded hole support mounting with M2 screws.
5pcs M2 screws are used for mounting the board. Mounting torque shall be 30Ncm ± 5.0Ncm.
Electrical Terminal Design
18
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MAH-SERIES
(Nominal Voltage Input, Quad Output)
Mechanical Diagram
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19
MAH-SERIES
(Nominal Voltage Input, Quad Output)
Part Numbering
MAH 100 05 05 08 12 Q /XXX
Model
MAH-Series
Nominal Input
Voltage
100 = 100V
Output 1
Quality Level
EBB = Elegant Bread Board Model
EQM = Engineering Qualification Model
Blank = Fight Model
Number of Outputs
Q = Quad Outputs
Output 4
05 = +5V
12 = +12V
Output 2
Output 3
05 = +5V
08 = -8V
Application Information
Standard Documentation
Each conbverter is delivered with The following documentation.
n Interface Control Drawing
n Users’s Manual
n End Item Data Package with Coc, Applicable Configuration, MIP Photo and Test Results
Design Justification Documentation
The following documentation can be made available upon request:
n Worst Case Analysis
n Parts Stress Analysis
n Thermal Analysis
n Mechanical Analysis
n FMECA
n Reliability Assessment
n Declared Components List
n Declared Materials List
n Declared Process List
WORLD HEADQUARTERS: 101 N, Sepulveda Blvd., El Segundo, California 90245, USA Tel: (310) 252-7105
IR SAN JOSE: 2520 Junction Avenue, San Jose, California 95134, USA Tel: (408) 434-5000
IR DENMARK: Literbuen 10C, DK-2740 Skovlunde, Denmark, Tel: +45 4457 5010
Visit us at www.irf.com for sales contact information.
Data and specifications subject to change without notice. 10/2013
20
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