The NXP TEA172x family is a series of small, low-cost module SMPS controller ICs that operate directly from the rectified universal mains input and are tailored for low-power applications up to 5, 8, ...
While DSPs are the primary controllers in uninterruptible power supplies (UPS) with power-factor correction (PFC), ac generation and battery management, David Caldwell, Flextek Electronics, Carlsbad, ...