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Unmanned aircraft for communications

This class of UAV depends on solar power to meet its long flight time requirements. Solar power systems rely on the use of maximum power-point tracking (MPPT) circuitry to ensure that solar energy is harvested at the optimum voltage before conversion to a voltage suitable for charging a secondary battery, or delivery to the power systems intermediate bus network. As this class of UAVs develops, high-efficiency power-conversion topologies such as zero-voltage switching and zero-current switching (ZVS/ZCS) which are used in Vicor BCMs are important to enable the widening variety of fuel sources and applications with increasing power challenges.

Unmanned aircraft for communications

The power delivery network

A combination of the BCM6123 providing the isolated conversion of the 350V to a 48V intermediate bus and the PI3741 ZVS Buck-Boost regulator with a very wide range input voltage operating capability provides a tightly regulated 28V output for various UAV loads.

Power Delivery Network for unmanned aircraft communications
BCM6123

BCM6123 

Fixed ratio DC-DC converter

Input: 260 – 410V

Output: 32.5 – 51.3V

Current: Up to 25.7A

63.3 x 22.8 x 7.2mm

ZVS buck-boost regulator

ZVS buck-boost regulators

Input: 8 – 60V

Output: 10 – 54V

Power: Up to 150W continuous

Efficiency: Over 98%

10.5 x 14.5 x 3.05mm

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