|
|
Part: S2815S
Category:
Description: Hi-rel DC-DC Rad-hard Single Converter in a S Package With 15 Vout
Company: International Rectifier Corp.
Datasheet: Download S2815S datasheet File size : 121 kB
Request For quote: Find where to buy S2815S
Datasheet text preview:
PD- 94584A
S-SERIES HIGH RELIABILITY RADIATION HARDENED LOW POWER DC/DC CONVERTER
Description
The S-Series of DC/DC converters are low 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 high 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 MIL-STD-975 and MIL-STD-1547. Extensive documentation including Radiation Susceptibility, Thermal Analysis, Stress Analysis and MTBF are available. The converters incorporate a fixed frequency single ended forward topology with magnetic feedback and an internal EMI filter utilizing large multilayer ceramic capacitors processed per MIL-PRF-49470 for improved reliability. All models include an external inhibit port . They are encased in a hermetic 1.71" x 1.31" x 0.45" steel package and weigh less than 50 grams. The package utilizes rugged ceramic feed-through copper core pins and is hermetically sealed using parallel seam welding. Environmental screening includes temperature cycling, constant acceleration, fine and gross leak, and burn-in as specified by MIL-PRF-38534 for class K hybrids. Non-flight versions of the S-Series converters are availa bl e for system development purposes. Variations inelectrical specifications and screening to meet custom requirements can be accommodated.
28V Input, Single/Dual Output
Features
n Total Dose > 100K Rad(Si) n n n n n n n n n n n n n SEE > 82 MeV.cm2/mg Low Weight < 50 grams Magnetically Coupled Feedback 18V to 40V DC Input Range Up to 10W Output Power Single and Dual Output Models Include 3.3, 5, 12, 15, ±5, ±12 and ±15V High Efficiency - to 82% -55°C to +125°C Operating Temperature Range 100M @ 500VDC Isolation Under-Voltage Protection Short Circuit and Overload Protection Output Over Voltage Limiter External Inhibit
Applications
n n n Geostationary or Low Earth Orbit Satellites Launch Vehicles Communication Systems
www.irf.com
1
10/17/03
S-SERIES
Circuit Description
The S-Series converters utilize a single-ended forward topology with resonant reset. The nominal switching frequency is 525kHz. 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. Output power is limited under any load fault condition to approximately 135% for singles and 145% for duals 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. There are no latching elements included in the load fault protection circuits to eliminate the possibility of falsely triggering the protection circuits during single event radiation exposure. An under-voltage protection circuit prohibits the converter from operating when the line voltage is too low for safe operation. The converter will not start until the line voltage rises to approximately 12 volts
An external enable port is provided to control converter operation. This input is intended for operation with an open collector transistor drive or a relay closure to the input return. The pin may be left open for normal operation and has a nominal open circuit voltage of 10.5V
Design Methodology
The S-Series was developed using a proven conservative design methodology, which includes selecting radiation tolerant, and established reliability components and fully derating to the requirements of MIL-STD-975 and MIL-STD-1547. Heavy derating of the radiation-hardened power MOSFET virtually eliminates the possibility of SEGR and SEB. A magnetic feedback circuit is utilized instead of optocouplers to minimize temperature, radiation and aging sensitivity. PSPICE was used extensively to predict and optimize circuit performance for both beginning and end-of-life. Thorough design analyses include Radiation Susceptibility (TREE), Worst Case, Stress, Thermal and Reliability (MTBF).
2
www.irf.com
S-SERIES
Absolute Maximum Ratings
Input voltage range Output power Lead temperature Operating temperature Storage temperature
-0.5Vdc to +60Vdc Internally limited 300°C for 10 seconds -55°C to +135°C -55°C to +135°C
Input voltage range Output power
Recommended Operating Conditions
18Vdc to +40Vdc 0 to Max. Rated -55°C to +125°C -55°C to +70°C
Operating temperature Operating temperature
1
1
Meets derating per MIL-STD-975
Electrical Performance Characteristics
Parameter Group A Subgroup Conditions -55°C TC +125°C VIN = 28V DC ± 5%, CL = 0 unless otherwise specified Limits Min 18 1 1 1 1 1 1 1 2,3 2,3 2,3 2,3 2,3 2,3 2,3 1,2,3 IOUT = 100% rated load Note 4 3.27 4.95 11.88 14.85 ±4.95 ±11.88 ±14.85 3.23 4.90 11.76 14.70 ±4.90 ±11.76 ±14.70 0 Nom 28 3.30 5.00 12.00 15.00 ±5.00 ±12.00 ±15.00 Max 40 3.33 5.05 12.12 15.15 ±5.05 ±12.12 ±15.15 3.37 5.10 12.24 15.30 ±5.10 ±12.24 ±15.30 10 V V V V V V V V V V V V V V V W W A A A A A A A % % Unit
Input Voltage Output Voltage ( Vout ) S2803R3S S2805S S2812S S2815S S2805D S2812D S2815D S2803R3S S2805S S2812S S2815S S2805D S2812D S2815D Output power ( POUT ) All Others Output current ( IOUT ) S2803R3S S2805S S2812S S2815S S2805D S2812D S2815D Line regulation ( VRLINE ) Load regulation ( VRLOAD ) Cross regulation ( VRCROSS ) S2805D S2812D S2815D 1,2,3
IOUT = 100% rated load Note 4
VIN = 18, 28, 40 Volts, Note 2 VIN = 18, 28, 40 Volts, Note 2
Either Output, Note 3 Either Output, Note 3 Either Output, Note 3 1,2,3 1,2,3 VIN = 18, 28, 40 Volts IOUT = 10%, 50%, 100% rated, Note 4 IOUT = 10%, 50%, 100% rated, Note 4 VIN = 18, 28, 40 Volts Duals only, Note 5 VIN = 18, 28, 40 Volts
0 0 0 0 0 0 0 -0.5 -1.0
3.03 2.0 0.83 0.67 1.6 0.66 0.54 0.5 1.0
1,2,3
-5.0 -3.0 -3.0
5.0 3.0 3.0
% % %
For Notes to Specifications, refer to page 5
www.irf.com
3
Others parts begin by s2
S2-1 S2-2 S2-3 S2-4 S2-5 S2-6 S2-7
|
|
|
