UCD8220 and UCD8620 are members of the UCD8K family of analog pulse-width modulator devices to be used in digitally managed power supplies using a microcontroller or the TMS320™ DSP family. UCD8220 and UCD8620 are double-ended PWM controllers configured with push-pull drive logic. The UCD8620 has a 110-V high-voltage startup circuit which can directly start up the controller from a 48-V telecom input line. Systems using UCD8K devices close to 100% of the switching frequency range (i.e., 10 kHz to 2 MHz) and 1µA to 2A of output current, enabling high efficiency and performance.
The UCD8220 and UCD8620 are analog pulse‑width‑modulator devices designed for digitally managed power supplies. They support both peak‑current‑mode and voltage‑mode control, feature a programmable current‑limit function, and include a 3.3 V linear regulator for the host controller.
The document provides detailed electrical characteristics, mechanical dimensions, package options (HTSSOP‑16, QFN‑16, QFN‑20), and application schematics for push‑pull and half‑bridge converter topologies.