Document
HYBRID-HIGH RELIABILITY 1MEGA-RAD HARDENED DC-DC CONVERTER
PD-94530C
ARM28XXT SERIES
28V Input, Triple Output
Description
The ARM Series of three output DC-DC converters are designed specifically for use in the high-dose radiation environments encountered during deep space planetary missions. The extremely high level of radiation tolerance inherent in the ARM design is assured as a result of extensive research, thorough analysis and testing, careful selection of components and lot verification testing of finished hybrids. Many of the best circuit design features characterizing earlier IR HiRel products have been incorporated into the ARM topology. Capable of uniformly high performance through long term exposures in radiation intense environments, this series sets the standard for distributed power systems demanding high performance and reliability.
The ARM converters are hermetically sealed in a rugged, low profile package utilizing copper core pins to minimize resistive DC losses. Long-term hermetically is assured through use of parallel seam welded lid attachment along with IR HiRel rugged ceramic pin-to-package seal. Axial lead orientation facilitates preferred bulkhead mounting to the principal heat-dissipating surface.
Manufactured in a facility fully qualified to MIL-PRF38534, these converters are fabricated utilizing DLA Land and Maritime 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 HiRel San Jose for special requirements.
ARM
Features
Total Dose > 1 MRads(Si) SEE Hardened to LET up to 83 MeV.cm2/mg De-rated per MIL-STD-975 & MIL-STD-1547 Output Power Range 3 to 30 Watts 19 to 50 Volt Input Range Input Under voltage Lockout High Electrical Efficiency > 80% Full Performance from -55°C to +125°C Continuous Short Circuit Protection 12.8 W/in3 Output Power Density True Hermetic Package External Inhibit Port Externally Synchronization Fault Tolerant Design 5V, ±12V or 5V, ±15V Outputs Available
1 2016-07-01
ARM28XXT SERIES
(28V Input, Triple Output)
Specifications
Absolute Maximum Ratings
Recommended Operating Conditions
Input voltage range
-0.5VDC to +80VDC Input voltage range
+19VDC to +60VDC +19V to +50V for full de-rating to MIL-STD-975
Minimum Output Current
5% Maximum rated current, any Output
Output power
3.0W to 30W
Soldering temperature
300°C for 10 seconds
-55°C to +125°C
Storage case temperature
-65°C to +135°C
Operating case temperature -55°C to +85°C for full de-rating to MIL-STD-975
Static Characteristics -55°C ≤ TCASE ≤ +125°C, VIN = 28VDC, CL= 0, unless otherwise specified.
Parameter
Symbol
Test Conditions
Limits
Unit
Min. Max.
Output voltage accuracy
Output power Output current
Note 5 Note 5
Line regulation
Note 3
Load regulation
Note 4
Cross regulation Note 8
Total regulation
Input current
Output ripple voltage Note 6 Input ripple current Note 6 Switching frequency
VOUT POUT IOUT
VRLINE
VRLOAD VRCROSS
VR
IIN VRIP IRIP FS
IOUT = 1.5Adc, TC = +25°C
(main)
IOUT = ±250mAdc, TC = +25°C ARM2812 (dual) IOUT = ±250mAdc, TC = +25°C ARM2815 (dual)
19 VDC< VIN < 50VDC
19 VDC< VIN < 50VDC
(main) (dual)
150 mAdc < IOUT < 3000 mAdc 19 Vdc< VIN < 50Vdc ±75 mAdc < IOUT < ±750 mAdc
(main) (dual)
150 mAdc < IOUT < 3000 mAdc 19 VDC< VIN < 50VDC ±75 mAdc < IOUT < ±750 mAdc
(main) (dual)
19 VDC < VIN < 50VDC
(main) (dual)
All conditions of Line, Load, Cross Regulation, Aging, Temperature and Radiation
(main)
ARM2812 (dual) ARM2815 (dual)
IOUT = minimum rated, Pin 3 open
Pin 3 shorted to pin 2 (disabled) 19 VDC< VIN < 50VDC IOUT = 3000 mAdc (main), ±500 mAdc 19 VDC< VIN < 50VDC IOUT = 3000 mAdc (main), ±500 mAdc
Synchronization input open. (pin 6)
(dual) (dual)
Efficiency
EFF IOUT = 3000 mAdc (main), ±500 mAdc
Enable Input open circuit voltage drive current (sink) voltage range
19VDC< VIN < 50VDC
For Notes to Electrical Performance Characteristics, refer to page 3
(dual)
2
4.95 5.05
±11.50 ±12.50 ±14.50 ±15.15
3.0 30
VDC W
150 3000 mAdc
75 750
-15 +15 mV
-60 +60
-180 +180 mV
-300 +300
-10 +10 mV
-500 4.8
+500 5.2
±11.1 ±13.9
±12.9 ±16.0
250
8.0
V mA
100 mVp.p
150 mAp.p 225 275 kHz 80 %
3.0 5.0
V
0.1 mA
-0.5 50.0
V
2016-07-01
ARM28XXT SERIES
(28V Input, Triple Output)
Static Characteristics (Continued) -55°C ≤ TCASE ≤ +125°C,VIN = 28VDC, CL =0, unless otherwise specified.
Parameter
Synchronization Input frequency range pulse high level pulse low level pulse rise time pulse duty cycle
Symbol
Test Conditions
External clock signal on Sync. input (pin 4)
Limits Min. Max.
Unit
225 310 kHz 4.5 10.0 V -0.5 0.25 V
40 V/s 20 80 %
Power dissipation, load fault
PD Short circuit, any output
Output response to st.