vpr Power Your Critical Mission Today Models Available Input: 15 V to 50 V continuous, 80 V transient 40 W, dual outputs of ±5 V, ±8 V, ±12 V, ±15 V Qualified to MIL-PRF-38534 Class H and Class K 1.0 DESCRIPTION The SVTR Series of space qualified DC-DC converters is specifically designed for the harsh radiation environment of space applications. Performance is guaranteed through the use of hardened semiconductor components, radiation lot acceptance testing (RLAT) of non-hardened components, and analysis. The SVTR 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 P. Characterization is performed at both the component level and at the SVTR Series hybrid converter level. The SVTR Series of DC-DC converters is radiation tolerant 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 40 W output power • Wide input voltage range: 15 V to 50 V plus 80 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 30 krad(Si) including ELDRS • SEE performance to 44 MeV-cm2/mg. 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 # 5962-11223 • 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: 2.890” x 1.125” x 0.405” • Max weight: 55 g • Industry standard pinout • Precision seam-welded hermetic metal case • Flanged and Non-flanged versions available 1.5 SIMILAR PRODUCTS AND ACCESSORIES • SVTR 40 W single output DC-DC converter • SVRTR 40 W space qualified DC-DC converter, 100 krad(Si) • Custom versions available • EMI filters • Non-isolated, space qualified point of load converters • Use with Thermal Pad TP-003

SVTR2800D Series 2.0 DIAGRAMS 2.1 BLOCK DIAGRAM D2 +VOUT C3 -VOUT INCOM Q1 MAGNETIC FEEDBACK UNDER VOLTAGE SHUTDOWN VOLTAGE AND CURRENT AMPLIFIERS PRIMARY HOUSEKEEPING SUPPLY SECONDARY HOUSEKEEPING SUPPLY 2.2 CONNECTION DIAGRAM DVMC28 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): E-mail: [email protected]

vpr Power Your Critical Mission Today O- Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load1, Unless Otherwise Specified Parameter Conditions Min Typ Max Min Typ Max Units 4. Verified by qualification testing 5. End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted 7. 5% Load to Full Load at -55 °C Sales Information Phone:(425) 353-3010 E-mail: [email protected] Half load at +Vout and half load at -Vout Up to 70% of the total power or current can be drawn from either of the two outputs Time for output voltage to settle within...

vpr Power Your Critical Mission Today Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load1, Unless Otherwise Specified Parameter Conditions Min Typ Max Min Typ Max Units 4. Verified by qualification testing 5. End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted 7. 5% Load to Full Load at -55 °C Sales Information Phone:(425) 353-3010 E-mail: [email protected] Half load at +Vout and half load at -Vout Up to 70% of the total power or current can be drawn from either of the two outputs Time for output voltage to settle within 1%...

SVTR2800D Series 4.0 PERFORMANCE CURVES Sales Information E-mail: [email protected]

vpr Power Your Critical Mission Today E-mail: [email protected] Web: www.vptpower.com

vpr Power Your Critical Mission Today 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 (Kovar, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Ceramic) Sales Information Phone:(425) 353-3010 Fax: (425) 353-4030E-mail: [email protected] Web: www.vptpower.com SVTR2800D - 7.0 Page 7

vpr Power Your Critical Mission Today 1. Tolerances are +0.005” unless otherwise stated 2. Case temperature is measured on the center of the baseplate surface 3. Mounting holes are not threaded. Recommended fastener is 6-32 4. Materials: Case (Steel, gold over nickel plated); Cover (Kovar, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Ceramic) Sales Information Phone:(425) 353-3010 Fax: (425) 353-4030E-mail: [email protected] Web: www.vptpower.com

SVTR2800D 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 SVTR2800D Series is an isolated dual-output flyback converter. It provides a positive and negative output voltage with respect to the OUTCOM pin. Up to 70% of the total output power is available from either output. The internal voltage regulation loop actively regulates the positive output using VPT’s proprietary magnetic feedback technology. The negative output is regulated...