Power_electronics Features

A New Approach to Circuit Breaker Design Using Silicon Carbide Switches - Nov 21
Mechanical circuit breakers can be low cost with minimal losses, but they operate slowly and wear out. Solid state versions overcome the problems and are becoming increasing viable as replacements at...
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Power Electronics Europe News
DC/DC converter has input range for transport
Targeted at industrial, transportation and avionic applications, the LT8331 can be configured as either a boost, SEPIC, flyback or inverting converter. Its switching frequency is programmable from 100 to 500kHz, enabling designers to minimise external component sizes.  Linear Technology’s Burst Mode operation reduces quiescent current to only 6µA while keeping output ripple below 20mVP-P. The footprint is minimised by virtue of a high voltage MSOP-16E package and small externals, says the company.

The internal high efficiency 0.5A switch delivers efficiencies of up to 90%. A single feedback resistor sets the output voltage whether the output is positive or negative, to minimise external components. The sync/mode pin enables synchronisation to an external clock or it can be used to select between Burst Mode operation for low IQ or pulse-skipping mode for the lowest possible noise. There is also programmable under-voltage lockout (UVLO), internal soft-start, frequency foldback and thermal shutdown protection.

The LT8331EMSE is available in a high voltage MSOP-16E package. An industrial temperature (˗40 to 125°C) version, the LT8331IMSE, is also available.



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