SVRSA2800S SERIES
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vpr Power Your Critical Mission Today A SVRSA2800S SERIES o-oSPACE QUALIFIED HYBRID DC-DC CONVERTERS Models Available Input: 18 V to 40 V continuous, 50 V transient 6 W, single output of 3.3 V, 5 V, 12 V, 15 V Qualified to MIL-PRF-38534 Class H and Class K SVRSA Series DC-DC Converter 1.0 DESCRIPTION The SVRSA Series of space qualified DC-DC converters is specifically designed for the harsh radiation environment of space applications and is designed in accordance with Aerospace TOR requirements. Performance is guaranteed through the use of hardened semiconductor components, radiation lot acceptance testing (RLAT) of non-hardened components, and analysis. The SVRSA Series has been characterized for Total Ionizing Dose (TID) performance including Enhanced Low Dose Rate Sensitivity (ELDRS) and for Single Event Effects (SEE) according to VPT's DLA-approved Radiation Hardness Assurance (RHA) plan per MIL-PRF-38534, Appendix G, Level R. Characterization is performed at both the component level and at the SVRSA Series hybrid converter level. The SVRSA Series of DC-DC converters is radiation hardened and suited for use in low Earth orbit (LEO), medium Earth orbit (MEO), geostationary orbit (GEO), deep space, and launch vehicle programs. 1.1 FEATURES • Up to 6 W output power • Wide input voltage range: 18 V to 40 V plus 50 V transient • Continuous operation over full military temperature range of -55 °C to +125 °C with no power derating • Very low output noise • Radiation immune magnetic feedback circuit • No use of optoisolators • Undervoltage lockout • Current limit protection / short circuit protection 1.2 SPACE LEVEL CHARACTERIZATIONS • Guaranteed TID performance to 100 krad(Si) including ELDRS • SEE performance to 85 MeV/mg/cm2. Transients are fully characterized for cross section and magnitude • Worst-case analysis, stress, radiation, reliability reports available 1.3 MANUFACTURING AND COMPLIANCE • Qualified to MIL-PRF-38534 Class H and Class K, DLA SMD 5962-15217 • Available compliant to MIL-HDBK-1547 and Aerospace TOR component level element evaluation • MIL-PRF-38534 element evaluated components • MIL-STD-461 C/D/E/F when used with appropriate VPT EMI filter • Manufactured in a MIL-PRF-38534 Class H and Class K facility • MIL-STD-883 • ISO-9001 1.4 PACKAGING • Low-profile: 2.00” x 1.130” x 0.355” • Max weight: 27 g • Industry standard pinout • Precision projection-welded hermetic metal case • Flanged and Non-flanged versions available 1.5 SIMILAR PRODUCTS AND ACCESSORIES • SVSA 6 W space qualified DC-DC converter, 30 krad(Si) • Custom versions available • EMI filters • Non-isolated, space qualified point of load converters • Use with Thermal Pad TP-002 Products and reports described in this datasheet are subject to all export license restrictions and regulations which may include but are not limited to ITAR (International Traffic in Arms Regulations) and the Export Administration and Foreign Assets Control Regulations. Further restrictions may apply. Contact VPT sales for details.

SVRSA2800S Series 2.0 DIAGRAMS 2.1 BLOCK DIAGRAM D1 UNDER VOLTAGE SHUTDOWN PRIMARY HOUSEKEEPING SUPPLY VOLTAGE AND CURRENT AMPLIFIERS MAGNETIC FEEDBACK SECONDARY HOUSEKEEPING SUPPLY 2.2 CONNECTION DIAGRAM SVRMH28 EMI FILTER 1 3.0 SPECIFICATIONS 3.1 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings Input Voltage (Continuous): Input Voltage (Transient, 1 second): ESD Rating per MIL-PRF-38534: Sales Information Operating Temperature (Full Load): Storage Temperature: Lead Solder Temperature (10 seconds):

vpr Power Your Critical Mission Today O- Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified Parameter Conditions Min Typ Max Min Typ Max Units 1. Time for output voltage to settle within 1% of steady-state value 2. Verified by initial electrical design verification. Post design verification, parameter shall be guaranteed to the limits specified 3. End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted 4. 37.5 V Max continuous to be compliant to MIL-HDBK-1547 and Aerospace TOR Sales Information...

vpr Power Your Critical Mission Today O- Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified Parameter Conditions Min Typ Max Min Typ Max Units 1. Time for output voltage to settle within 1% of steady-state value 2. Verified by initial electrical design verification. Post design verification, parameter shall be guaranteed to the limits specified 3. End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted 4. 37.5 V Max continuous to be compliant to MIL-HDBK-1547 and Aerospace TOR Sales Information...

SVRSA2800S Series 4.0 PERFORMANCE CURVES 4.1.1 SVRSA283R3S Efficiency (Typical, 25 °C) Sales Information

SVRSA2800S Series 5.0 MECHANICAL OUTLINES AND PINOUT Non-Flanged Package Option: 0.250in±0.015 BASEPLATE SURFACE 1. Tolerances are +0.005” unless otherwise stated 2. Case temperature is measured on the center of the baseplate surface 3. Materials: Case (Steel, gold over nickel plated); Cover (Steel, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Glass) Sales Information

SVRSA2800S Series 5.0 MECHANICAL OUTLINES AND PINOUT (CONTINUED) Flanged Package Option: 2.000in 50.80mm MAX BASEPLATE SURFACE Tolerances are +0.005” unless otherwise stated Case temperature is measured on the center of the baseplate surface Mounting holes are not threaded. Recommended fastener is 4-40 Materials: Case (Steel, gold over nickel plated); Cover (Steel, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Glass) Sales Information

SVRSA2800S Series 6.0 TECHNICAL NOTES Please note that many of these functions are also demonstrated in detail on the VPT website in the form of technical video labs. 6.1 GENERAL INFORMATION 6.1.1 Topology Description The SVRSA2800S Series is an isolated single-output flyback converter. It operates over a wide input voltage range and provides a tightly regulated positive output voltage with respect to the OUTCOM pin. Feedback isolation is accomplished using VPT’s proprietary magnetic feedback technology. The converter regulates with zero load, and no minimum load is required. 6.1.2 External...