SOSA™ Aligned Power Supply
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SOSA™ Aligned Power Supply SOSA-Aligned DC-DC Converter Features & Benefits Product Description The Vicor SOSA-aligned power supply is a COTs power supply that is designed for 3U Open VPX systems that are developed to the SOSA standard. The module utilizes Vicor proprietary technology to enable high efficiency and power density for this highly rugged, conduction-cooled model. • 18 – 45V input voltage range • 800W output power • 3U Open VPX power supply • Conduction cooled • I2C IPMI 46.11 monitoring and control • Input voltage reverse‑polarity protection Up to four power supplies can be paralleled to increase output power capability of +12V main and +3.3V auxiliary outputs with proprietary wireless current sharing. Need for conventional current‑share pins are eliminated. Current share accuracy is ±2A. • Remote voltage sensing for +12V and +3.3V auxiliary • Parallel operation capable with proprietary wireless current sharing • Overcurrent, overvoltage and overtemperature protections • IPC-A-610 class 3 • No aluminum electrolytic capacitors • Enable, inhibit, system reset and power fail controls • Meets military standard compliance: [a] Typical Applications • VPX power modules • Avionics • Shipborne electronics See detailed specifications; contact Vicor Applications Engineering for report details. SOSA™ Aligned DC-DC Converter Page 1 of 26 Note: Product images may not highlight current product

3U P0 Connector Note: See mechanical drawing on page 30 for connector information. SOSA™ Aligned DC-DC Converter Page 2 of 26

Function / Name Input control signal as defined in VITA 62, referenced to SIGNAL_RETURN Input control signal as defined in VITA 62, referenced to SIGNAL_RETURN Geographical address defined by VITA 46.11 Geographical address defined by VITA 46.11 When any of the output is not within specification, FAIL* signal will be driven low to indicate a failure VS1 sense, should be connected at point-of-load or on the backplane to corresponding voltage output VAUX sense, should be connected at point-of-load or on the backplane to corresponding voltage output SOSA™ Aligned DC-DC Converter Page 3 of 26...

SOS028x3U800yzzz Part Ordering Information Part Number Product Grade Factory-Configured Options Conformal Coating C = Coated D = Coated + AU-plated Connector C = Coated D = Coated + AU-plated Connector Programmable, [b] SOSA standard keying [c] Programmable, [b] VITA46 No-Key Guide Socket [c] Programmable units can be set by the user to parallel ready or standalone operation only via I2C. Contact factory for options with no remote sense or different output voltages.See I2C user guide for information on changing the unit from Parallel operation to Standalone. By default, units are set to...

SOS028x3U800yzzz Electrical Characteristics All data at nominal line and nominal load unless otherwise specified. Attribute Conditions / Notes Overall System Characteristics System Efficiency Nominal line, 25% aggregate loads Nominal line, 50% aggregate loads Nominal line, 100% aggregate loads Power Input Characteristics Operating Input Voltage Range Input Current (No Load) Inrush Current Power On to +3.3V Auxiliary Output Delay 18 28V Input, enable asserted, inhibit de-asserted Peak no load, nominal line, high line; see Figure 5 If ENABLE* is tied to signal ground Input Undervoltage...

SOS028x3U800yzzz Signal Characteristics All of the following plots are at nominal line and 600W aggregate load unless otherwise noted. ENABLE*: Enable* • The ENABLE* pin or control register bit enables and disables the +3.3V AUX output of the power supply. • The ENABLE* pin has an internal pull-up to VCC and is referenced to the Signal Return pin of the power supply. Signal Type Digital Input Conditions / Notes ENABLE* Enable Threshold ENABLE* Disable Threshold ENABLE* Internal Pull‑Up Resistance to VCC ENABLE* Enable Debounce Delay ENABLE* Disable Debounce Delay Conditions / Notes Status...

SOS028x3U800yzzz Signal Characteristics (Cont.) All of the following plots are at nominal line and 600W aggregate load unless otherwise noted. GA0*, GA1*: Geographical Address I2C • The GA0* and GA1* pins sets the address of the power supply. Geographical address is set at start up and cannot be changed without a power cycle. • The GA0* and GA1* pins have an internal pull-up to VCC and is referenced to the Signal Return pin of the power supply. Signal Type Digital Input Conditions / Notes Address Pins Low Threshold Address Pins High Threshold ENABLE* Internal Pull‑Up Resistance to VCC...

Figure 1 — Response time from VIN applied to outputs available; under 200ms start; VIN = 28V Figure 2 — VS1 (+12V) ripple at 10% load (6A), AC-coupled Figure 3 — AUX (+3.3V) ripple, AC-coupled SOSA™ Aligned DC-DC Converter Page 8 of 2

SOS028x3U800yzzz General Characteristics Attribute Conditions / Notes Mechanical Length Wedge-Lock Torque Manufacturer’s recommended value Thermal Operating Temperature Assembly Storage Temperature SOSA™ Aligned DC-DC Converter Page 9 of 26 MIL-HDBK-217Plus Parts Count - 25°C Ground Benign, Stationary, Indoors / Computer Telcordia Issue 2 - Method I Case III; 25°C Ground Benign, Controlled

SOS028x3U800yzzz Signal Pin Functions ENABLE* & INHIBIT* Enable and Inhibit pins express active low logic. Table 1 has the truth table for the output state of the power supply. It is necessary to avoid the indeterminate output state where 0.8 – 2.0V is applied to the ENABLE* or INHIBIT* pins. A digital debounce filter is present on the signals of both pins to prevent false transitions. The ENABLE* and INHIBIT* also have a minimum delay between successive output enable transitions to prevent repeated starts into high capacitance loads. See detailed specifications for delays time limits....

SOS028x3U800yzzz Card Edge Temperature Sensors Fault Operation The PCBA card edge temperature sensor internal to the power supply is mounted on the edge of the PCBA card edge. Consequently, the temperature sensor measures a temperature that is generally higher than the heat-sink-to-rail mounting interface and lower than the hot spot of the internal converters in the power supply. See Table 5 for nonrecoverable fault thresholds which trigger a fault and shut down/restart of the outputs of the supply. Response from the power supply to I2C command 0x21 provides the temperature measured by the...