NCP1618CDR2G

The NCP1618CDR2G from On Semiconductor is an innovative multimode power factor controller. It is designed to optimize efficiency over varying line and load conditions by naturally transitioning between operation modes, including Continuous Conduction Mode (CCM) and Frequency-Clamped Critical Conduction Mode (FCCrM). In very light load conditions, it can enter Soft-SKIP mode to minimize losses.

This controller features a firm control of the switching frequency between 25 kHz and 130 kHz, with a typical frequency of 65kHz specified in some database entries and 130kHz from the manufacturer page. It operates with a wide voltage range of 9.5V to 35V and supports a minimum operating temperature of -40°C and a maximum of 125°C. The device includes general features such as a high-voltage start-up current source, internal compensation of the regulation loop, and a pfcOK signal for enabling downstream converters.

Protection features include soft and fast overvoltage protection, line-sag and brown-out detection, 2-level over current detection, bulk under-voltage detection, and thermal shutdown. The NCP1618CDR2G is housed in a 9-SOIC package, suitable for surface mounting.

Typical applications include PC power supplies and all off-line appliances requiring power factor correction. Its robust design and comprehensive features make it a versatile component for power supply designs.