The high efficiency K78Uxx-500R3 series of switching regulators have been designed by Mornsun and are suitable for use in space constrained and cost-conscious designs. The switching regulators are available from Relec Electronics.
The 12W switching regulars are offered in an extremely wide input range of 9.0 – 90Vdc and with outputs ranging from 3.0 – 24Vdc.
Efficiency is up to 93% to minimise heat loss through dissipation. It also means that heatsinks are not required, resulting in space savings and reduced mounting costs.
The seven non-isolated DC-DC converters in the series range from 1.65-12W, depending on the model. Each version is also available with a 90 degree pin formation (denoted with an L suffix).
Characteristics include low ripple and low noise operation, with a MTBF of >2,000,000 hours. Operating temperature is -40 to +85°C and all models have short circuit protection and thermal shutdown safety functions. They are also RoHS-compliant.
The K78Uxx regulators are supplied in a SIP3 package and are pin-compatible with the LM78xx linear regulators and can be used to directly replace them.