AKA's Advanced Solutions Group can tailor this complex technology to provide our customers with a full custom solution that can meet any requirement or specification. The basic design and control functions are scalable to accommodate different loads and number of channels using the existing qualified design. Most other design parameters and control function capabilities would stay the same. Due to the unique flexible design of both the hardware and software of the SSPC, AKA can quickly customize our proven SSPC technology to provide:

• Any number of power channels up to 16
• Any mix of current ratings per channel
• Any control interface such as Ethernet, CAN, Mil-STD 1553, RS232, I2C, USB, UART (TTL), etc.
• Tripping based on any percentage of I(max) level, and any time delay
• Any board form factor (single board design, or use of a mezzanine card)
• Add Pulse Width Modulation (PWM) to the load
• New software commands and features as required

A complete, dedicated Automated Test Equipment (ATE) for testing our SSPC based products was designed and programmed by AKA. This ATE is in use for fully testing all features of the SSPC under all possible load conditions. The ATE can be easily programmed and configured to test any customized SSPC solution.

The AKA SSPC is a proven technology that has passed a rigorous ATP and fully complies with - among other standards - MIL-STD 1275A pertaining to the 28V power, and MIL-STD 461D pertaining to EMI.

AKA has productized this technology and offers an off-the-shelf, fully functional and tested solution. If this product does not fit your exact needs, check out its specification and capabilities to learn more about what you can ask for and expect from a fully customized design.

AKA's SSPC solutions far exceed any comparable solutions in the market both in performance and features. Here are some of the advantages you will benefit from:

• Extreme ESS: HALT/HASS/POS Limits. Designed for harsh environments with extended temperature range and vibrations. AKA uses a unique and proprietary PCB design that provides the PCBA the required rigidity for use in a highly dynamic environment, as well as a heat sink for thermal dissipation which allows for conductive cooling. This precludes use of a traditional Bus Bar, which may act as a "moment arm" or "lever" that can fracture the PCBA or solder under severe vibration. MOSFETs are mechanically fastened through the PCB using screws, providing strain relief to solder joints and heat spreading.

• No Calibration Needed: No calibration is required on the AKA design after manufacture and production acceptance testing. The AKA design uses only three resistors to determine current measurement accuracy. And external A/D transfers 'digital' data across the opto-couplers rather than 'analog' signals eliminating re-calibration requirements.

• I2T Curve: The AKA power management controller uses an I2T curve for power and channel protection. The time delay and current level defined by this I2T curve are software settable in the AKA design. Changing an embedded table value easily allows curve shaping. The I2T time constraint and/or current levels can each be increased or decreased as required. This feature is especially useful for future upgrades. AKA can accommodate power requirements for new equipment/future upgrades without the need for SSPC redesign.

• Battle Override (B/O): AKA SSPC has the capability to ignore (override) any SW decision to shut down a specific power channel, forcing the channel to ON. This feature is useful in forcing a channel to remain on during a mission critical situation.

• Short Circuit Condition: In addition to following the I2T curve for over current and short circuit protection, AKA has implemented HW short circuit protection. The SW driven I2T short circuit control may take up to 1msec before shutting down in a short circuit event. The HW circuit will respond in 20 to 30usec. This control is a hardware feature and not software dependent. There is no shut down ambiguity that can be seen from software control.

• Channel Voltage Drop: The below table shows measured Voltage Drops for various current (Amps) switch levels. Maintaining a low voltage drop is also a major advantage for reducing heat dissipation and increasing the MOSFET component life:
  
  

• Quick Active Shutdown: where typical specification can be 1msec for on/off, the AKA solution's measured shut down value is 20usec. Shut down is nearly immediate which minimizes on-time during a short circuit event reducing possibility of damage. This also results in less stress to MOSFET. AKA achieved this performance by adding an additional FET to discharge all gate voltages at power off.

• Nuclear Event Detector (NED): NED is implemented which insures a 400usec shut down time. All voltages on the AKA SSPC are protected by on-board NED SHDN circuit.