ON Semiconductor – Signal and Power Devices

Manufacturer of Semiconductors and Electrical Components.  They are a major supplier of power components and systems to designers of computers, communications, consumer, and industrial systems.

They have a product portfolio that include energy efficient power components, signal management, logic, discrete and custom devices.

These are used for LED Lighting, Industrial Applications, Networking & Telecommunications, Power Supply and Circuit Protection.

NCP1247 Controller – Fixed Frequency, Current Mode, for Flyback Converters

The NCP1247 is a new fixed−frequency current−mode controller featuring the Dynamic Self−Supply. This function greatly simplifies the design of the auxiliary supply and the VCC capacitor by activating the internal startup current source to supply the controller during start−up, transients, latch, stand−by etc.

This device contains a special HV detector which detect the application unplug from the AC input line and triggers the X2 discharge current. This HV structure allows the brown−out detection as well.

ON Semiconductor
5005 East McDowell Road, Phoenix, AZ 85008, USA.