The TOP223PN is an offline converter manufactured by Power Integrations that is used to boost, buck, flyback, or forward, depending on the application. It has an operating frequency of 100kHz and comes in an 8-PDIP package. The converter uses a wide range of integrated functions to provide high system efficiency and fast transient response, with features including valley-fill, valley-switch, active burst mode control, thermal protection, integrated startup and switching frequencies, and frequency jittering. It has a wide input voltage range (85-265VAC) and a wide output voltage range (2-150V).