Power controllers take 700V switches onboard

A new range of offline power supply switching regulators features integrated 700V power switches to offer designers a complete, yet affordable control solution for rugged power supplies.

Four new offline power supply switching regulators - each with an integrated 700V power switch and a unique set of performance features - offer designers a complete, yet affordable control solution for rugged power supplies in digital cameras, digital video recorders and players, battery chargers, wall adapters, white goods, industrial equipment, consumer electronics auxiliary units and LED displays.

The new NCP1012 and NCP1013 devices are monolithic, switching regulators for low standby-power offline switch mode power supplies (SMPS).

With programmed current limits of 250 and 350mA, respectively, they enable designers to select from several preset limits to meet their applications' needs.

Both devices are available with fixed switching frequencies of 100 or 133kHz.

To improve overall power supply reliability, they feature a true soft-start capability that prevents power component damage from excess heating and overstress at power-up.

ON Semiconductor's patented dynamic self-supply (DSS) function eliminates the need for a transformer auxiliary winding by allowing the integrated circuit to bias itself directly from a high-voltage input rail.

The skip-cycle operation of these devices is designed to eliminate the audible noise common in many competitive products.

"ON Semiconductor developed the NCP1012 and NCP1013 to address the industry demand for a practical, simplified and affordable power supply designs", said Andy Williams, ON Semiconductor Director of Analog Power Conversion Products.

"This series of devices also achieves best-in-class stand-by power performance - facilitating compliance with Energy Star and Blue Angel recommendations".

The NCP1012 and NCP1013 are offered in the space-saving, PDIP 7-lead package to accommodate high-voltage pin-to-pin creepage requirements.

They are priced at $0.55 per unit in 10,000-unit quantities.

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