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PD-95887A
ARH28XXS SERIES HYBRID - HIGH RELIABILITY RADIATION HARDENED DC/DC CONVERTERS
Description
The ARH Series of DC/DC converters has been designed specifically for use in the hostile environments The high level of radiation tolerance inherent in the ARH design is the result of extensive research, thorough analysis and testing and of careful component specification. Designed to supplement the triple output configuration provided by the ART series, the ARH circuit topology is the follow-on to the successful ART design and incorporates many of the design features characterizing that product line. Capable of uniform high performance over long term exposures in radiation intense environments, this series expands the standard for distributed power systems demanding high performance and reliability in the harsh environments. The ARH converters are hermetically sealed in a rugged, low profile package utilizing copper core input and output pins to minimize resistive DC losses. Longterm hermeticity is assured through use of parallel seam welded lid attachment along with rugged ceramic pinto-package seal. Axial orientation of the leads facilitates preferred bulkhead mounting placing the converter on the principal heat-dissipating surface. Manufactured in a facility fully qualified to MIL-PRF38534, these converters are fabricated utilizing DSCC qualified processes. For available screening options, refer to device screening table in the data sheet. Variations in electrical, mechanical and screening specifications can be accommodated. Contact IR Santa Clara for special requirements.
28V Input, Single Output
ARH Features
n n n n n n n n n n n n n n n n n Total Dose > 100 krad (Si), 2:1 Margin SEE Hardened to LET up to 83 MeV.cm2/mg Derated per MIL-STD-975 & MIL-STD-1547 Output Power to 30 Watts Regulates to No-Load 18 to 50 Volt Input Range Input Undervoltage Lockout Fully Characterized from -55C to +125C Continuous Short Circuit Protection 12.8 W/in3 Output Power Density True Hermetic Package External Inhibit Port Externally Synchronizable Fault Tolerant Design Available with Outputs from 2.5V to 15V Overload Protection Standard Microcircuit Drawings Available
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ARH28XXS Series
Specifications
Absolute Maximum Ratings
Input Voltage range Soldering temperature Storage case temperature -0.5V to +80VDC 300C for 10 seconds -65C to +135C
Recommended Operating Conditions
Input Voltage range Output Power Operating case temperature +18V to +60VDC +18V to +50V for full derating to MIL-STD-1547 0 to 30W -55C to +125C -55C to +85C for full derating to MIL-STD-975
Electrical Performance
Parameter
Output voltage accuracy ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Output power
-55C < TCASE < +125C, VIN = 28V5%, CL = 0 unless otherwise specified.
Symbol
VOUT
Test Conditions
POUT = 30 W, TC = +25C
Limit MIN
2.487 3.283 4.975 5.174 11.940 14.925
Limit MAX
2.513 3.317 5.025 5.226 12.060 15.075 30
Units
Vdc
POUT
18 Vdc < VIN < 50Vdc
0
W
Output current ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Line regulation Note 3 Load regulation Note 4 Total regulation
IOUT
18 Vdc < VIN < 50Vdc 0 0 0 0 0 0 12000 9090 6000 5770 2500 2000 +1.0 +2.0 +4.0 100 mA inhibited (Pin 3 shorted to pin 2) -- 8.0 18 Vdc < VIN < 50Vdc, IOUT = IMAX 30 30 40 40 50 50 mAdc
VRLINE VRLOAD VR
18 Vdc < VIN < 50Vdc, 0 < IOUT < IMAX 18 Vdc < VIN < 50Vdc, 0 < IOUT < IMAX All conditions of Line, Load, Temperature, Radiation and End of Life IOUT = 0 (Pin 3 open)
-1.0 -2.0 -4.0 --
% % %
No-load input current Output ripple and noise voltage Note 5 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S
IIN VRIP
mVp.p
For Notes to Specifications, refer to page 4
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ARH28XXS Series
Electrical Performance
Parameter
Input ripple current Note 5 Switching frequency Efficiency ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Enable Input open circuit voltage drive current (sink) voltage range Synchronization Input frequency range pulse high level pulse low level pulse rise time pulse duty cycle Synchronization Output pulse high level Power dissipation, Short circuit ARH2802R5S ARH2803R3S & ARH2805S All Others Output response to step load changes Note 8 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Recovery time from step load changes Notes 8, 9 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Output response to step line changes Notes 7, 10 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S PD External clock signal on Sync. input (pin 4) 225 3.5 -0.5 40 20 Signal compatible with Synchronization Input 3.7 Short circuit on output 10 12 9.5 VTLD 50% Load 100% load -200 -200 -200 -200 -300 -350 TTLD 50% Load 100% load 200 200 200 200 200 200 VTLN IOUT = IMAX, VIN = 18 V to/from 50 V -180 -180 -250 -250 -450 -900 180 180 250 250 450 900 200 200 200 200 300 350 W 4.3 V 310 10 0.25 80 KHz V V V/s %
-55C < TCASE < +125C, VIN = 28V5%, CL = 0 unless otherwise specified. (Continued)
Symbol
IRIP FS Eff
Test Conditions
18 Vdc < VIN < 50Vdc, IOUT = IMAX Synchronization input open. (pin 6) IOUT = IMAX, TC = +25C
Limit MIN
Limit MAX
100
Units
mAp.p KHz
225 72 75 76 76 80 80 3.0 -0.5
275
%
5.0 100 50
V A V
mVPK
s
mVPK
For Notes to Specifications, refer to page 4
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ARH28XXS Series
Electrical Performance
Parameter
Recovery time from step line changes Notes 7, 9, 10 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Turn on overshoot Turn on delay Note 11 Capacitive load Notes 6, 7 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Isolation Recovery from a short circuit
-55C < TCASE < +125C, VIN = 28V5%, CL = 0 unless otherwise specified. (Continued)
Symbol
TTLN
Test Conditions
IOUT = IMAX, VIN = 18 V to/from 50 V
Limit MIN
Limit MAX
Units
600 600 700 700 320 400 VOS TDLY CL IOUT = 10% or 100% of IMAX IOUT = 10% or 100% of IMAX No effect on DC performance 1200 1200 1000 1000 180 120 ISO Vr 500VDC Input to Output or any pin to case Output shorted, then open into max rated load current. Vin = 28 V 100 10 2.0 5.0 20
s
%Vout ms
F
M % of Rated Output Voltage % of Max Output Current
Overload Trip Current
Ovld
Maximum current at specified output voltage
105
135
Notes to Specifications Tables
1. 2. 3. 4. 5. 6. Operation outside absolute maximum/minimum limits may cause permanent damage to the device. Extended operation at the limits may permanently degrade performance and affect reliability. Device performance specified in Electrical Performance table is guaranteed when operated within recommended limits. Operation outside recommended limits is not specified. Parameter measured from 28 V to 18 V or to 50 V while load remains fixed at 10%, 50% and 100% of Imax. Parameter measured from 50% to 10% or 100% of maximum load conditions while line remains fixed at 18, 28 or 50 volts. Guaranteed for a bandwidth of DC to 20 Mhz. Tested using a 20 Khz to 2.0 Mhz bandwidth. A capacitive load of any value from 0 to the specified maximum is permitted without compromise to DC performance. A capacitive load in excess of the maximum limit may interfere with the proper operation of the converter's short circuit protection, causing erratic behavior during turn on. Parameter is tested as part of design characterization or after design or process changes. Thereafter, parameters shall be guaranteed to the limits specified in the table. Load transient rate of change, di/dt 2.0 A/s. Recovery time is measured from the initiation of the transient to where V OUT has returned to within 1% of its steady state value.
7. 8. 9.
10. Line transient rate of change, dv/dt 50 V/s. 11. Turn on delay time is for either a step application of input power or a logical low to high transition on the enable pin (pin 3) while power is present at the input.
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ARH28XXS Series
Group A Tests
Test
Output voltage accuracy ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Output power Note 1 Output current Note 1 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Output regulation Note 4 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S IOUT = 0, Pin 3 open No Load Input Current Output ripple Note 2 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Switching frequency Input ripple Note 2 Recovery from a short circuit Overload Trip Current IIN Pin 3 shorted to pin 2 (disabled) VRIP VIN = 18 V, 28V, 50 V IOUT = IMAX 1, 2, 3 8.0 VR IOUT = 10%, 50%, 100% of IMAX VIN = 18 V, 28V, 50 V POUT IOUT VIN = 18 V, 28V, 50 V VIN = 18 V, 28V, 50 V 1, 2, 3 1, 2, 3 0 0 0 0 0 0 12000 9090 6000 5770 2500 2000
VIN = 28V, CL = 0 unless otherwise specified.
Symbol
VOUT
Test Conditions
IOUT = IMAX , Tc = 25C
Group A Subgroups
1
Limit MIN
Limit MAX
Units
2.487 3.283 4.975 5.174 11.940 14.925 0
2.513 3.317 5.025 5.226 12.060 15.075 30
V
W
mA
1, 2, 3
2.425 3.201 4.850 5.044 11.640 14.550
2.575 3.399 5.150 5.356 12.360 15.450 100
V
1, 2, 3
mA
1, 2, 3
30 30 40 40 50 50 225 275 100 5.0
mVP-P
FS IRIP Vr
Synchronization pin (pin 6) open VIN = 18 V, 28V, 50 V IOUT = IMAX Output shorted, then open into max rated load current. Vin = 28 V Maximum current at specified output voltage
4, 5, 6 1, 2, 3
KHz mAP-P % of Rated Output Voltage % of Max Output Current
Ovld
1, 2, 3
105
135
For Notes to Group A Tests, refer to page 6
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ARH28XXS Series
Group A Tests
Test
Efficiency ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Power dissipation, Short circuit ARH2802R5S ARH2803R3S & ARH2805 All Others Output response to step load changes Note 5 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Recovery from step load changes Notes 5, 6 ARH2802R5S ARH2803R3S ARH2805S ARH2805R2S ARH2812S ARH2815S Turn on overshoot Turn on delay Note 7 Isolation VTL 50% Load to/from 100% load 4, 5, 6 -200 -200 -200 -200 -300 -350 TTL 50% Load to/from 100% load 4, 5, 6 200 200 200 200 200 200 VOS TDLY ISO IOUT = 10% and 100% IOUT = minimum and full rated 500VDC Input to output or any pin to case (except pin 12) 4, 5, 6 4, 5, 6 1 2.0 100 5.0 20 s 200 200 200 200 300 350 mVPK PD Short circuit across output
VIN = 28V, CL = 0 unless otherwise specified. (continued)
Symbol
Eff IOUT = IMAX
Test Conditions
Group A Subgroups
Limit MIN
Limit MAX
Units
1
72 75 76 76 80 80 68 68 72 72 78 78
%
2, 3
1, 2, 3 10 12 9.5 W
%Vout ms M
Notes to Group A Test Table
1. 2. 3. 4. 5. 6. 7. 8. Parameter verified during dynamic load regulation tests. Guaranteed for DC to 20 MHz bandwidth. Test conducted using a 20KHz to 2.0MHz bandwidth. Deleted Output is measured for all combinations of line and load. Only the minimum and maximum readings for the output are recorded. Load step transition time 10S. 10s. Recovery time is measured from the initiation of the transient to where VOUT has returned to within 1% of its steady state value. Turn on delay time is tested by application of a logical low to high transition on the enable pin (pin 3) with power present at the input. Subgroups 1 and 4 are performed at +25C, subgroups 2 and 5 at +125C and subgroups 3 and 6 at -55C.
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ARH28XXS Series
Figure I. Block Diagram
1
+Input
EMI Filter
11 12
+Vout Under-Voltage Detector
13 14
Output Return Primary Bias & Reference Overload & Short Circuit Error Amp
+ -
3
Enable
Level Translator & Buffer
10
+Sense
9
-Sense
4
Sync In
5
Pulse Width Modulator
Sample & Hold
Sync Out Input Return
2
Circuit Operation and Application Information
The ARH28XXS series of converters have been designed using a single ended forward switched mode converter topology. (Refer to Figure I.) Single ended topologies enjoy certain advantages in radiation hardened designs in that they eliminate the possibility of simultaneous turn on of both switching elements during a radiation induced upset. In addition, single ended topologies are not subject to transformer saturation problems often associated with double ended implementations. The design incorporates a two-stage LC input filter to attenuate input ripple current. A low overhead linear bias regulator provides both a bias voltage for the converter primary control logic and a stable, well-regulated reference for the error amplifier. Output control is realized using a wide band discrete pulse width modulator control circuit incorporating a unique non-linear ramp generator circuit. This circuit helps stabilize loop gain over variations in line voltage for superior output transient response. Nominal conversion frequency has been selected as 250 KHz to maximize efficiency and minimize magnetic element size. Output voltages are sensed and fed back to the controller using a patented magnetic feedback circuit. This circuit is designed to be relatively insensitive to variations in temperature, aging, radiation and manufacturing tolerances making it particularly well suited to radiation hardened designs. The control logic has been designed to use only radiation tolerant components, and current paths include series resistances to limit photocurrents. Other key circuit design features include output short circuit and overload protection, input undervoltage lockout and an external synchronization input port, permitting operation at an externally set clock rate. Alternately, a synchronization output is provided to lock frequencies with another converter when using more than one converter in a system.
Thermal Considerations
The ARH series of converters is capable of providing relatively high output power from a package of modest volume. The power density exhibited by these devices is obtained by combining high circuit efficiency with effective methods of heat removal from the die junctions. Good design practices have effectively addressed this requirement inside the device. However when operating at maximum loads, heat generated at the die junctions depends upon minimally restricted thermal conduction from the base plate for that heat to be carried away. To maintain case temperature at or below the specified maximum of 125C, this heat can be transferred by attachment of the ARH28XXS to an appropriate heat dissipater held in intimate contact with the converter base-plate. Effectiveness of this heat transfer is dependent on the intimacy of the baseplate to heatsink interface. It is therefore suggested that a heat-transferring medium possessing good thermal conductivity be inserted between the baseplate and heatsink. A material utilized at the factory during testing and burn-in processes is sold under the
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ARH28XXS Series
trade name of Sil-Pad(R) 4001. This particular product is an insulator but electrically conductive versions are also available. Use of these materials assures optimum surface contact with the heat dissipater by compensating for minor surface variations. While other available types of heat conducting materials and thermal compounds provide similar effectiveness, these alternatives are often less convenient and are sometimes messy to use. A conservative aid to estimating the total heat sink surface area (AHEAT SINK ) required to set the maximum case temperature rise (DT) above ambient temperature is given by the following expression:
Inhibiting Converter Output
As an alternative to application and removal of the DC voltage at the input, the user can control the converter output by providing an input referenced, TTL compatible, logic signal to the enable pin 3. This port is internally pulled "high" so that when not used, an open connection on the pin permits normal converter operation. When inhibited outputs are desired, a logical "low" on this port will shut the converter down. An open collector device capable of sinking at least 100 A connected to enable pin 3 will work well in this application. A benefit of utilization of the enable input is that following an initial charge of the input capacitor, subsequent turn-on commands will induce no uncontrolled current inrush.
A HEAT SINK
where
T 0.85 80 P
-1. 43
- 5.94
T = Case temperature rise above ambient 1 P = Device dissipation in Watts = P - 1 Eff
OUT
Figure II. Enable Input Equivalent Circuit
As an example, assume that it is desired to maintain the case temperature of an ARH2815S at +65C or less while operating in an open area whose ambient temperature does not exceed +35C; then T = 65 - 35 = 35C. From the Specification Table, the worst case full load efficiency for this device is 80%; therefore the maximum power dissipation at full load is given by
1 . P = 30 * - 1 = 30 * (0.25) = 75W .80
and the required heat sink area is
Synchronization
- 5.94 = 318 in 2 .
When using multiple converters, system requirements may dictate operating several converters at a common system frequency. To accommodate this requirement, the ARH28XXS type converter provides a synchronization input port. The sync input port permits synchronization of an ARH converter to any compatible external frequency source operating in the band of 225 to 310 KHz. In the event of failure of an external synchronization source, the converter will revert to its own internally set frequency. When external synchronization is not desired, the sync in port may be left open (unconnected) permitting the converter to operate at its own internally set frequency.
35 A HEAT SINK = 0.85 80 * 7.5
-1. 43
Thus, a total heat sink surface area (including fins, if any) of approximately 32 in2 in this example, would limit case rise to 35C above ambient. A flat aluminum plate, 0.25" thick and of approximate dimension 4" by 4" (16 in2 per side) would suffice for this application in a still air environment. Note that to meet the criteria, both sides of the plate require unrestricted exposure to the ambient air. The user should remember that when operating in the vacuum of space, this method does not apply and all heat must be conducted away from the attaching surface.
1Sil-Pad is a registered Trade Mark of Bergquist, Minneapolis, MN
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ARH28XXS Series
When an external frequency source is not available, an internal clock signal is provided through appropriate buffering at the sync out port. This port can drive a minimum of 3 ARH sync in ports thereby allowing all to operate at the same clock frequency.
EMI Filtering
Although the internal filtering provided at both input and output terminals of the ARH series converters is sufficient for most applications, some critical applications may require additional filtering in order to accommodate particular system requirements. While the internal input filter maintains input ripple current below 50 mA p-p, an external filter can be applied to further attenuate this ripple to a level below the CE03 limits imposed by MIL-STD-461. International Rectifier currently supplies such a filter housed in a complementary package. The catalog number of this part is ARF461.
Output Short Circuit Protection
Protection against accidental short circuits on the output is provided in the ARH28XXS converter. This protection is implemented by sensing primary switching current and reducing the switching pulse widths when a short occurs. The output current is therefore limited to a maximum value, which protects the converter. Under this condition the internal power dissipation is nearly the same as for maximum loading.
Output Noise
When attempting noise measurement at the output of switching converters, measurement techniques employed can have a significant influence on results during these tests. Any noise measurements should be undertaken only with test leads dressed as close to the device output pins as is physically possible. Probe ground leads should be kept to a minimum (<< 1") length to minimize the influence of parasitic impedances on results.
Input Undervoltage Protection
A minimum voltage is required at the input of the converter to initiate operation. This voltage is set to a nominal value of 16.8 volts. To preclude the possibility of noise or other voltage variations at the input falsely initiating and halting converter operation, a hysteresis of approximately 1.0 volts is incorporated into this circuit. The converter is guaranteed to operate at 18 Volts input under all specified conditions.
Input Filter
To attenuate input ripple current, the ARH28XXS series converters incorporate a two-stage LC input filter illustrated in Figure III following. The elements of this filter comprise the dominant input load impedance characteristic, and therefore determine the nature of the current inrush at turn-on.
Figure III. Input Filter
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ARH28XXS Series
Radiation Performance
The radiation tolerance characteristics inherent in the ARH28XXS converters are a result of a carefully planned ground-up design program with specific radiation design goals. Identification of the general circuit topology, a fundamental task in the design effort, was followed by selection of appropriate elements from a list of devices for which extensive radiation effects data was available. By imposing sufficiently large margins on those electrical parameters showing the worst case degrading effects of radiation, designers were able to select appropriate elements for incorporation into the circuit. Existing radiation data was utilized for input to PSPICE and RadSPICE in the generation of circuit performance verification analyses. Thus, electrical performance capability under all environmental conditions including radiation was well understood before first application of power to the inputs. A principal design goal was achieving a converter topology that, because of large design margins, had radiation performance essentially independent of radiation induced element-lot performance variations. Where such margins cannot be assured, element lots are either selected following RLAT characterization as radiation hard devices or, purchased as radiation hard devices so that realization of the design goals are maintained. . The following table specifies guaranteed minimum radiation exposure levels tolerated while maintaining specification limits.
Radiation Specification Tcase = 25C
Test
Total Ionizing Dose (2:1 Margin) Dose Rate Temporary Saturation Survival Heavy Ions (Single event effects)
Conditions
MIL-STD-883, Method 1019.4 Operating bias applied during exposure MIL-STD-883, Method 1021
Min
100
Typ
500
Max
Unit
Krads (Si)
1E8 1E11 BNL Dual Van de Graf Generator 83
Rads (Si)/sec MeV* cm/mg
International Rectifier currently does not have a DSCC certified Radiation Hardness Assurance Program.
Standard Quality Conformance Inspections on ARH28XXS Series (Filght Screened)
Inspection
Group A Group B Group C
Application
Part of Screening on Each Unit Each Inspection Lot First Inspection Lot or Following Class 1 Change In Line (Part of Element Evaluation)
Samples
100% * 5 units 10 units
Group D
3 units
* Group B quantity for option 2 End of Line QCI. No Group B samples required for Option 1, In-line.
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ARH28XXS Series
Mechanical Outline
O 0.136 - 6 Holes
0.040 Pin Dia.
5
8 9 10 11 12 13 14
1.675
2.200
6 x 0.200 = 1.200
1.950
0.375 0.263 0.138 0.300 0.150 1.400 2.400 2.700 0.275 Max
Mounting Plane
0.500 Max
3.25 Ref. Max 0.050 Flange
Note:
1. Dimensions are in inches. 2. Base Plate Mounting Plane Flatness 0.003 maximum. 3. Unless otherwise specified, tolerances are = 2 .XX = .01 .XXX = .005 4. Device Weight - 120 grams maximum.
Pin Designation
Pin # 1 2 3 4 5 8 9 10 11 12 13 14 Designation + Input Input Return Enable Sync In Sync Out Chassis -Sense +Sense +V Output +V Output Output Return Output Return
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1
2
3
4
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ARH28XXS Series
Device Screening
Requirement
Temperature Range Element Evaluation Non-Destructive Bond Pull Internal Visual Temperature Cycle Constant Acceleration PIND Burn-In Final Electrical ( Group A ) PDA Seal, Fine and Gross Radiographic External Visual MIL-PRF-38534 2023 2017 1010 2001, Y1 Axis 2020 1015 MIL-PRF-38534 & Specification MIL-PRF-38534 1014 2012 2009
MIL-STD-883 Method
No Suffix
d
CK
d
EM
-55C to +85C N/A N/A
-55C to +85C Class K Yes Yes Cond C 3000 Gs Cond A 320 hrs @ 125C ( 2 x 160 hrs ) -55C, +25C, +85C 2% Cond A, C Yes Yes
-55C to +85C Class K Yes Yes Cond C 3000 Gs Cond A 320 hrs @ 125C ( 2 x 160 hrs ) -55C, +25C, +85C 2% Cond A, C Yes Yes
c
Cond C 3000 Gs N/A 48 hrs @ 125C
-55C, +25C, +85C N/A Cond A N/A
c
Notes:
c d
Best commercial practice. CK is DSCC class K compliant without radiation performance. No Suffix is a radiation rated device but not available as a DSCC qualified SMD per MIL-PRF-38534.
International Rectifier currently does not have a DSCC certified Radiation Hardness Assurance Program.
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit Drawing Number
5962-04232 5962-04233
Part Numbering
ARH 28 05 S /EM Model Input Voltage Nominal
28 = 28V
IR Standard Part Number
ARH2805S ARH2803R3S
Screening Level
(Please refer to Screening Table)
No Suffix, CK, EM
Output
S = Single D = Dual
Output Voltage
02R5 = 2.5V, 03R3 = 3.3V 05 = 5V, 05R2 = 5.2V 12 = 12V, 15 = 15V
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105 IR SANTA CLARA: 2270 Martin Av., Santa Clara, California 95050, Tel: (408) 727-0500 Visit us at www.irf.com for sales contact information. Data and specifications subject to change without notice. 08/2006
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