DESCRIPTION

· The NCP1090, NCP1091, and NCP1092 are IEEE 802.3af PoE-PD interface controllers from ON Semiconductor.

· These devices integrate detection, classification, under voltage lockout, inrush, and operational current limit functions.

· NCP1091 features programmable under-voltage, and NCP1092 includes an auxiliary pin for auxiliary supplies.

· Built with a robust high-voltage process, they include a rugged vertical N-channel DMOS for harsh environments.

· They complement ON Semiconductor’s ASSP portfolio for industrial devices, suitable for integration with stepper motor drivers and CAN bus drivers.

FEATURES

· Fully compliant with IEEE 802.3af specifications.

· Programmable classification current and adjustable under-voltage lockout (NCP1091 only).

· Open-drain power good indicator and 130 mA inrush current limit.

· 500 mA operational current limit and pass switch disabling input for auxiliary supply (NCP1092 only).

· Over-temperature protection and industrial temperature range from -40°C to 85°C, with full operation up to 125°C junction temperature.

· 0.5 Ω hot-swap pass-switch and vertical N-channel DMOS pass-switch for robustness.

APPLICATIONS

· Suitable for industrial and security markets, integrating with high-voltage interfacing devices.

· Can be combined with stepper motor drivers and CAN bus drivers for complete solutions.