vpr Power Your Critical Mission Today i SVCL2800S SERIES o-oSPACE QUALIFIED HYBRID INRUSH CURRENT LIMITER Models Available Input: 11 V to 50 V continuous, 80 V transient 100 W and 200 W versions Qualified to MIL-PRF-38534 Class H and Class K 1.0 DESCRIPTION The SVCL Series of space qualified Inrush Current Limiters are 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 SVCL 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 SVCL Series hybrid converter level. The SVCL28 is designed to control the inrush current drawn by VPT's EMI filters and DC-DC converters during turn-on. The SVCL28 functions by limiting the rate of rise of its output voltage and will also control the inrush current of discrete input capacitors. The SVCL28 Series of Inrush Current Limiters 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 • High reliability • Wide input voltage range: 11 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 • Compatible with external capacitance • Inhibit out • No use of optoisolators • Undervoltage lockout 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 # 5962-16216 • 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: 1.075” x 1.075” x 0.270” • Max weight: 16 g • Precision projection-welded hermetic metal case 1.5 SIMILAR PRODUCTS AND ACCESSORIES • SVFL 120 W space qualified single output DC-DC converter • SVFL 120W space qualified dual output DC-DC converter • DVCL INRUSH current limiter • Custom versions available • EMI filters 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. O-O

vpr Power Your Critical Mission Today O- 2.0 DIAGRAMS 2.1 BLOCK DIAGRAM +VINQ-COM0 _2_ UNDER VOLTAGE SHUTDOWN INHIBIT CONTROL INRUSH CURRENT CONTROL PRIMARY HOUSEKEEPING SUPPLY E-mail: [email protected] Web: www.vptpower.com

vpr Power Your Critical Mission Today O- Tcase = -55 °C to +125 °C, VIN = +28 V ± 5%, Full Load, Cout = 100|jF Unless Otherwise Specified Parameter Conditions Min Typ Max Units 1. Derate linearly to 0 at 135 °C. 2. Verified by initial electrical design verification. Post design verification, parameter shall be guaranteed to the limits specified. Sales Information Phone:(425) 353-3010 Fax: (425) 353-4030E-mail: [email protected] Web: www.vptpower.com

vpr Power Your Critical Mission Today O- Tcase = -55 °C to +125 °C, VIN = +28 V ± 5%, Full Load, Cout = IQQpF Unless Otherwise Specified Parameter Conditions Min Typ Max Units 1. Derate linearly to Q at 135 °C. 2. Verified by initial electrical design verification. Post design verification, parameter shall be guaranteed to the limits specified. Sales Information Phone:(425) 353-3Q1Q Fax: (425) 353-4Q3QE-mail: [email protected] Web: www.vptpower.com

vpr Power Your Critical Mission Today O- 4.1.1 SVCL285R5S Vin, lin during turn-on at 28V with 4.1.2 SVCL285R5S Vin, Vout, Inhibit Out during turn-on at 4.1.4 Output Voltage vs. Input Voltage 4.1.3 SVCL285R5S Vin, Vout, lin during turn-on at 28V, Cout=250pF max E-mail: [email protected] Web: www.vptpower.com

vpr Power Your Critical Mission Today O- 4.0 PERFORMANCE CURVES (CONTINUED) 4.2.1 SVCL2811S Vin, lin during turn-on at 28V with DVME28, 4.2.2 SVCL2811S Vin, Vout, Inhibit Out during turn-on at Cout=100pF and 2x SVFL2800S at full load 28V 4.2.4 Output Voltage vs. Input Voltage 4.2.3 SVCL2811S Vin, Vout, lin during turn-on at 28V, Cout=500pF E-mail: [email protected] Web: www.vptpower.com

vpr Power Your Critical Mission Today O- 5.0 MECHANICAL OUTLINES AND PINOUTStandard Package Option: 0.200in±0.015 [5.08mm±0.38] 0.270in [6.86mm] MAX-- 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) E-mail: [email protected] Web: www.vptpower.com

Power Your Critical Mission Today O- SVCL28 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 SVCL2800S Series utilizes series MOSFETs between the +Vin and +Vout pins of the device. The internal control circuitry drives the MOSFET gates in order to limit the ramp rate of the device output voltage. This controlled ramp rate limits the peak current that is drawn from the system power bus while charging the capacitors in downstream EMI filters,...