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Vicor Corporation
VITA 62 Power Supply

VITA 62 Power Supply

Product catalog summary

Overview:
The VITA 62 DC-DC Converter is a robust, conduction-cooled power supply designed for 3U Open VPX systems, offering high efficiency and power density. It supports an input voltage range of 18-45V and provides up to 600W output power. Key features include I2C monitoring and control, reverse-polarity protection, and parallel operation capability with wireless current sharing.

Key Features:

Compliance with Open VPX – VITA 62
Conduction-cooled design
Protections against overcurrent, overvoltage, and overtemperature
Compliance with military standards (MIL-STD-704F, MIL-STD-461G, MIL-STD-810G, MIL-STD-1275E, RTCA/DO-160G)
No aluminum electrolytic capacitors
Controls for enable, inhibit, system reset, and power fail

Applications:

VPX power modules
Avionics
Shipborne electronics

Electrical Characteristics:

System efficiency ranges from 83% to 87.5% depending on load
Operating input voltage range: 18-45V
Output power limit during starting disturbances: 300-600W
Main outputs include VS1 (+12V), VS2 (+3.3V), and VS3 (+5V) with specific voltage set points and regulation details

Connector Pin Configuration:
Detailed descriptions of connector pins are provided, including functions such as DC input, auxiliary outputs, and control signals like ENABLE* and INHIBIT*.

Signal Characteristics:

ENABLE* and INHIBIT* pins control the power supply outputs
Geographical Address pins (GA0*, GA1*) set the I2C address
FAIL* and SYSRESET* signals indicate operational status with LED indicators

Application Characteristics:
Includes response times for various operational states and transient response data for output voltage stability under load changes.

Figures and Graphs:
Figures illustrate response times, ripple, and transient responses for different loads and conditions, providing visual insights into the converter's performance.

Specifications and Characteristics:
Focuses on load step responses for various outputs, including VS3 (+5V), AUX2 (+3.3V), AUX1 (–12V), and AUX3 (+12V). Includes transient response graphs for load changes and ripple measurements.

Mechanical and Thermal Specifications:
Dimensions are specified as per VITA62 standards, with a length of 6.634 inches, width of 3.937 inches, and height of 0.951 inches. It weighs 685 grams. The operating temperature range is from -40°C to 85°C, with storage temperatures between -55°C and 125°C.

Signal Pin Functions:
Details on signal pins such as ENABLE*, INHIBIT*, GA0*, GA1*, SYSRESET*, and FAIL* are provided. These pins use active low logic, with specific voltage thresholds to avoid indeterminate states. Truth tables for output states based on pin logic levels are included.

Protection Mechanisms:
Includes input and output voltage protection, overcurrent protection, and overtemperature protection. Specifies conditions under which the power supply will shut down or restart, including temperature thresholds and voltage limits.

Parallel and Standalone Operation:
Guidelines for paralleling power supplies and switching to standalone operation are provided. Explains the importance of proper sense line connections for load regulation and details the byte sequence required to switch modes using I2C™.

Power Limits and Fault Operation:
Power limits are defined per MIL-STD-1275E, with specific conditions for transient cranking disturbances. Fault thresholds and recovery mechanisms are outlined, including the role of the FAIL* line in indicating out-of-spec conditions.

Additional Features:
Includes information on card edge temperature sensors and their role in monitoring internal temperatures. Provides a table of maximum current ratings for parallel arrays and discusses the implications of switching between paralleling and standalone modes.

Specifications and Calculations:
Outlines the formula for calculating sensor outputs: y = (Mx + (B • 10^K1)) • 10^K2. This formula is used to determine sensor readings.

Sensors and Constants:
Lists various sensors and their parameters, including sensor number, hex sensor name, type code, description, SI units, and coefficients (M, B, K1, K2). These sensors measure parameters like voltage, current, temperature, and power consumption.

Thresholds:
Table 9 provides critical and nonrecoverable thresholds for sensors. Exceeding these limits triggers system events and may lead to power supply shutdowns. Specifies that the input voltage's high non-recoverable threshold is set to 60V to handle MIL-STD-1275E surges.

Power Architecture:
Includes an EMI filter, reverse voltage blocking, and various voltage outputs (VS2, VS3, VAUX1, VAUX2, VAUX3). Details the internal power configuration and connections at the VITA 3U P0 connector.

Mechanical Drawing:
Provides dimensions in inches and details on connector components, including part numbers and manufacturers.

Revision History:
Outlines updates and corrections made in various versions, including changes to sensor commands, IPMI information, and sensor thresholds.

Contact Information:
Contact details for Vicor Corporation are provided for customer service and technical support.

Catalog excerpts

VITA 62 Power Supply VIT028x3U600y000 VITA 62 DC-DC Converter Features & Benefits Product Description The Vicor VITA 62 power supply is a COTs power supply that is designed for 3U Open VPX systems. 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 • 600W output power • 3U Open VPX power supply • Conduction cooled • I2C™ monitoring and control Up to four power supplies can be paralleled to increase output power capability of VS1, VS2, VS3 outputs with proprietary wireless current sharing. Conventional current-share pins are eliminated. Current share accuracy is ±2A. • Input voltage reverse‑polarity protection • Remote voltage sense: VS1, VS2, VS3 • Parallel operation capable with proprietary wireless current sharing • Overcurrent, overvoltage and overtemperature protections • IPC 610 class 3 • No aluminum electrolytic capacitors • Enable, inhibit, system reset and power fail controls • Accredited laboratory military standard compliance: [a] MIL-STD-704F MIL-STD-461G MIL-STD-810G MIL-STD-1275E RTCA/DO-160G Typical Applications • VPX power modules • Avionics • Shipborne electronics See detailed specifications; contact Vicor Applications Engineering for report details. VITA 62 DC-DC Converter Page 1 of 34 Note: Product images may not highlig

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3U P0 Connector Note: See mechanical drawing on page 30 for connector information. VITA 62 DC-DC Converter Page 2 of 34

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Function / Name Backplane may repurpose this contact for a signal less than 20V Backplane may repurpose this contact for a signal less than 20V Backplane may repurpose this contact for a signal less than 20V Backplane may repurpose this contact for a signal less than 20V Backplane may repurpose this contact for a signal less than 20V Input control signal as defined in VITA 62, referenced to SIGNAL_RETURN Input control signal as defined in VITA 62, referenced to SIGNAL_RETURN Backplane may repurpose this contact for a signal less than 20V Backplane may repurpose this contact for a signal less...

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VIT028x3U600y000 Part Ordering Information Part Number Product Grade Factory-Configured Options Conformal Coating D = Coated + AU-plated Connector Factory option 000 units can be set by the user to parallel ready or standalone operation only via I2C™. See I2C user guide for information on changing the unit from Parallel operation to Standalone. By default, units are set to parallel from the factory. Absolute Maximum Ratings The absolute maximum ratings below are stress ratings only. Operation at or beyond these maximum ratings can cause permanent damage to the device. Parameter Total Output Power...

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VIT028x3U600y000 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 +3.3VAUX 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 Lockout Recovery...

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VIT028x3U600y000 Electrical Characteristics (Cont.) All data at nominal line and nominal load unless otherwise specified. Attribute Conditions / Notes Main Outputs (Cont.) VS3: +5V Output Output Voltage Set Point Output Regulation Over Line & Load Nominal line over load range, 20MHz BW; measured with 1µF and 10µF ceramic capacitor Output Voltage Ripple / Noise Rated Output Current Maximum Operating Transmission Voltage Drop Maximum Output Capacitance Soft-Start Ramp Time All full load with max CO-VS3 VS2: +3.3V Output Output Voltage Set Point Output Regulation Over Line & Load Nominal line over...

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VIT028x3U600y000 Electrical Characteristics (Cont.) All data at nominal line and nominal load unless otherwise specified. Attribute Conditions / Notes Auxiliary Outputs VAUX1: –12V Output Output Voltage Set Point Output Regulation Over Line & Load Nominal line over load range, 20MHz BW; measured with 1µF and 10µF ceramic capacitor Output Voltage Ripple / Noise Rated Output Current Maximum Output Capacitance Soft-Start Ramp Time All full load with max CO-VAUX1 VAUX3: +12V Output Output Voltage Set Point Output Regulation Over Line & Load Output derived directly from VS1,+12V Main Output; output...

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VIT028x3U600y000 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 register...

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VIT028x3U600y000 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 Address...

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VIT028x3U600y000 Application Characteristics All of the following plots are at nominal line and 600W aggregate load unless otherwise noted. ENABLE* grounded ENABLE* grounded Figure 1 — Response time from ENABLE* pin grounded to outputs available; under 200ms start; 28VIN, INHIBIT* floating, ENABLE* grounded, no load Figure 5 — Measured inrush current at 28V input voltage VITA 62 DC-DC Converter Page 10 of 34 ENABLE* float Figure 4 — Discharge time of all outputs from ENABLE* pin moving from ground to floating Figure 3 — Response time from VIN applied to outputs available; under 200ms start; 28VIN,...

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VITA 62 Power Supply

VITA 62 Power Supply

Catalog excerpts

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