Implementing Peak Current Control Mode
The efficiency of high wattage power supplies can be increased by adopting digital implementation of the power systems. So it is not a surprise that an increasing number of embedded engineers are taking to it.
Controlling peak current modes is not a new thing for embedded designers or custom power supply vendors but it was traditionally used in the context of analog control schemes.
In advanced power systems, control over the current mode offers a number of advantages like improved regulation of the load line, cycle by cycle protection and current limiting and improved flux balancing.
At the same time, control of peak current mode is difficult to implement in digital architecture because it requires slope compensation and support circuitry. As a result, a full digitally controlled system is not feasible. But the introduction of digital signal processors and integrated hardware has made the job simple.
Advancements in technology have made microprocessors cheaper, while returning greater power efficiency and precision. They are powering a range of applications including industrial power supplies, high performance power systems in the military and medical fields and rectifier and server power supplies.
No doubt, there are a number of challenges in designing power systems for such high power systems. Custom power supplies are becoming increasingly popular for such applications.