NCP1622DCCSNT1G

The NCP1622DCCSNT1G from ON Semiconductor is an enhanced, high-efficiency Power Factor Controller designed to drive PFC boost stages. It utilizes an innovative Valley Synchronized Frequency Fold-back (VSFF) method, allowing for efficient operation at both nominal and light loads by reducing stand-by losses.

This controller operates in Critical Conduction Mode (CrM) and features on-time modulation for proper current shaping in VSFF mode. It supports skip mode at very low load currents and includes a dynamic response enhancer for fast line/load transient compensation. The device offers high drive capability (-500 mA / +800 mA) and operates within a VCC range of 9.5 V to 30 V.

Housed in a 6-TSOP package, the NCP1622DCCSNT1G is suitable for surface mount applications. Its features include thermal shutdown, over-voltage protection, brown-out detection, and over-current limitation, making it a robust component for compact PFC stages. Typical applications include PC power supplies, lighting ballasts, flat TVs, and other off-line appliances requiring power factor correction.

Key specifications include a switching frequency of 33 kHz, an operating temperature range of -40°C to 125°C, and a power dissipation of 550 mW. The device also features low start-up consumption and line range detection for reduced crossover frequency spread.