onsemi Power Management for Switch Mode Power Supplies (SMPS)
Featured products, solutions and more
onsemi’s Offline SMPS System Solutions Guide features the basics about offline SMPS, together with the featured products and solutions provided by our supplier partner.
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Featured Product Series
NCP4390
The NCP4390 by onsemi is an advanced Pulse Frequency Modulated (PFM) controller for LLC resonant converters with Synchronous Rectification (SR) that offers best-in-class efficiency for isolated DC/DC converters.
It employs a current mode control technique based on charge control, where the triangular waveform from the oscillator is combined with the integrated switch current information to determine the switching frequency.
This provides a better control-to-output transfer function of the power stage simplifying the feedback loop design while allowing true input power limit capability. Closed-loop soft-start prevents saturation of the error amplifier and allows monotonic rising of the output voltage regardless of load condition.
A dual-edge tracking adaptive dead time control minimizes the body diode conduction time thus maximizing efficiency.
Features
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More Information
onsemi features Offline Switch Mode Power Supplies (SMPS), which are switching power supplies with an isolation transformer that is powered by the grid ranging from low wattage laptop battery chargers to many kilowatts for server power supplies.
The worldwide focuses on improving energy efficiency with standards like the European Union Executive Committee's latest CoC V5 and the U.S. Department of Energy DoE VI have clear requirements on the power loss and efficiency during not only full load, but light load/no load to achieve energy saving and emission reduction. Higher efficiency can be achieved by using power switches with better performance or by implementing different control strategies. In addition, choose the most appropriate topology in different conditions.
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