New-Tech Europe | September 2016 | Digital Edition

Solid State Power Controller Module

DDC 16-Channel Solid State Power Controller Board

table 1

both to and from the location of the crew. Since SSPCs can be controlled over a network, their use eliminates the need to run power wires to and from the crew location, thereby saving weight and reducing fuel consumption. Power Dissipation SSPCs provide a lower thermal profile than circuit breakers. This is based on the low on-resistance of switching MOSFETs, whose affect can be further reduced by paralleling multiple MOSFETs and/or multiple SSPC channels for switching current to the same load. Further, solid state switching eliminates the power dissipated in the relay coils, solenoids, bimetallic strips, and contact resistances found in circuit breakers and relays. As a result, SSPCs provide a significant advantage in internal power dissipation relative to circuit breakers and relays. Reliability In terms of reliability, SSPCs provide significant advantages over electromechanical circuit breaker/

Electromechanical Relay + Circuit Breaker

SSPC Channel

Voltage

28V 25A

28V 25A

Channel Current

Relay Coil Dissipation

1.86 W 3.75 W 2.60 W

-- -- --

Relay Contacts Dissipation Circuit Breaker Dissipation

SSPC Voltage Drop

--

0.115V

Total Channel Power Dissipa- tion

8.2 W

2.875 W

Channel Power Dissipation, SSPC vs. Electromechanical Switching

circuit breakers and relays. DDC 16-Channel Solid State Power Controller Board Weight and Volume Relative to electromechanical switching, SSPCs provide advantages in the areas of weight and volume. From a system-level top-down perspective. At a system level, this provides SSPCs an advantage in power-to- volume density of 7.3 to 1. This provides SSPCs an advantage in power-to-weight density of about 4.6 to 1.

Avionic Certified Latest Generation, Multi-Channel SSPC Architecture Flight-Safety, Critical Architecture, Utilizes Redundancy and Fail-Safe features to ensure reliable Avionic PDU operation. Reduced Wiring For either an aircraft or a ground vehicle, if load switching is performed using crew-accessible circuit breakers, then these must be located in the vicinity of the pilot or operator. This forces all power wires to be routed

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