Power Board
VPX Chassis — Power Board
Power Board
The Power Card provides central, monitorable, and protected power distribution infrastructure for all modules in the VPX chassis. It generates all system-specific power rails from the 28V DC input voltage standard in military systems. The design compliant with the VITA 62 approach facilitates modular chassis integration.
- Standard:VITA 62
- Input:28V DC
- Power:≥500W
- Protection:OVP / OCP / UVLO
Input and Conversion
| Feature | Value / Description |
|---|---|
| Input Voltage | 28V DC |
| Main Output | +12V (SOSA base rail) |
| Secondary Outputs | +3.3V, +5V, ±12V AUX, 3.3V_AUX (for IPMC) |
| Conversion Technology | VICOR isolated DC-DC converter + multi-stage regulator |
| EMI Filter | Targeting MIL-STD-461 baseline test compliance |
Protection and Monitoring
| Feature | Value / Description |
|---|---|
| Protections | OVP (overvoltage), OCP (overcurrent), UVLO, short-circuit protection |
| Backplane Interface | P0 utility power, PMBus/I2C management, power good / fault signals |
| Monitoring | Rail voltage, current, temperature sensors, fault LED |
| Startup | 3.3V_AUX is generated first — enables early activation of IPMCs |
| Management | IPMC (VITA 46.11) |
Technical specifications
Power distribution advantages
Provides reliable power to all VPX modules with centralized, monitorable, and protected power infrastructure.
- 28V DC military-standard input
- PMBus/I2C rail monitoring
- OVP/OCP/UVLO protection circuits
- VITA 62-compliant power rails
Conclusion
Reliable power infrastructure
The Power card ensures that all modules in the VPX chassis are powered safely and with full monitoring capability.