The principle of Constant On-Time (COT) has been used as a control method for buck, or step-down, regulators for many years. As a technique it has a number of advantages over standard, fixed-frequency ...

Microchip’s AT9933 is a variable frequency PWM controller IC, designed to control a LED lamp driver using a low-noise boost-buck topology. The device is ideally used for LED lamps and other LED ...

The simplest of fan-control schemes — an on-off switch — is simple but inefficient, because it provides more cooling than necessary most of the time. When on, the fully powered switch-controlled fan ...