CogniPower Technology Overview
Every switched-mode power converter is different. Each has its own
particular requirements for balancing the tradeoffs needed to meet
performance targets without risking unstable operation---all within
size and cost constraints. Because of the highly individualized controls
employed to meet these competing needs, there are many thousands of
different power controller chips on the market. CogniPower sees
that situation as a symptom of an underlying problem: too much focus
on the trees, and not enough on the forest.
All power converters are governed by the same physical principles.
A single control device operating according to those principles should
be suitable for a wide variety of applications. We have achieved that
broad operability with a new control method called Predictive Energy
Balancing (PEB). PEB is a generalized, scalable control method that is
built on the fundamental kinetic energy equations. PEB is capable of
handling buck, boost, flyback and SEPIC topologies and does not require
compensation. The same controls can be used for power amplifiers, as
Research and development on PEB and its ramifications has been underway
at CogniPower for six years. We have built many demonstration systems,
from a 50 milliwatt boost supply, to a 2 watt wall adapter, to a
kilowatt power amplifier. At APEC 2013, we demonstrated a power
converter that is agile enough to follow a high fidelity audio signal.
In other words, it is an audio power amplifier that produces its output
directly from an unregulated input voltage. Lower cost, higher efficiency
and smaller size are the bonus effects of our more direct design.
Anyone who has spent days or weeks compensating a conventional power
converter will quickly see the benefits of PEB for agility, stability,
efficiency, and ease of application. Anyone involved in the supply
chain will appreciate replacing many specialized parts with a single,
generalized, more capable part.
Any power converter, amplifier or motor drive is a candidate for
So yes, every switched mode power converter may be different, but the
same Predictive Energy Balancing controller can do a better job than a
whole family of conventional controllers.