ON Semiconductor LLC (Phoenix, AZ) introduced the NCP1205, a pulse-width modulator current-mode controller for high-voltage and off-line power conversion applications. The NCP1205 is suitable for power conversion in consumer electronics and Internet appliances. Applications include laptop computer adapters, open-frame power supplies, stand-by power supplies, lightweight battery chargers and any space-constrained power supply application.
The NCP1205 targets high-efficiency and low-power, stand-by applications requiring quiet electromagnetic interference. A 30W switch-mode power supply built with the NCP1205, consumes less than 150mW at high line (240Vac) and no load. The NCP1205 operates in true quasi-resonant valley switching mode and reduces its switching frequency when the output power demand decreases. The features reduce EMI and turn-on losses, while improving power supply efficiency when in stand-by mode.
The NCP1205 Series is available in PDIP-8 and PDIP-14 packages priced at $0.65 for 10,000-unit quantities.
