ON Semi Intros NCP1203/NCP1200A Controllers

ON Semiconductor Corp. (Phoenix, AZ) introduced the NCP1203 and NCP1200A pulse-width modulator (PWM), current-mode controllers that enable power supply designers to meet standby power regulations with a low-cost optimized solution. The devices are suitable for DVD players, DVR recorders, set-top boxes, game consoles, PDA adapters, digital and video camera adapters and appliances with digital displays.

The NCP1200 family provides a flexible way to mix-and-match with external MOSFETs to serve product applications from 5W to 100W with the same basic power-supply design and footprint. The NCP1203 and the NCP1200A offer user-programmable peak current, output drive capability of 250mA, as well as a "skip-cycle" mode for efficiency at light loads.

The NCP1200A is a second-generation version of the NCP1200 with improved FET drive capability, lower standby power consumption and the company's proprietary dynamic self-supply circuitry, which allows power to be drawn directly from the high-voltage rail at start-up. The NCP1203 is suitable for providing the lowest possible standby power consumption in numerous end-product designs. In independent tests, a 70W switched-mode power supply built with the NCP1203 consumed only 89mW of standby power at maximum line voltage (242V).

In a surface-mount SO-8 package, the NCP1203 and NCP1200A are priced at $0.40 per unit in 10,000-unit quantities. In a PDIP-8 package, both devices are priced at $0.45 per unit in 10,000 unit-quantities.