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NCP1246 - Fixed Frequency Controller

General Description

Pin No 1 2 3 4 5 6 Pin Name LATCH FB CS GND DRV VCC Function LatchïOff Input Feedback + Shutdown pin Current Sense ï Drive output VCC input Pin Description Pull the pin up or down to latchïoff the controller.

Key Features

  • a timerïbased fault detection that ensures the detection of overload and an adjustable compensation to help keep the maximum power independent of the input voltage. Due to frequency foldback, the controller exhibits excellent efficiency in light load condition while still achieving very low standby power consumption. Internal frequency jittering, ramp compensation, and a versatile latch input make this controller an excellent candidate for the robust power supply designs. A dedicated Off mode al.

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Datasheet Details

Part number NCP1246
Manufacturer onsemi
File Size 1.24 MB
Description Fixed Frequency Controller
Datasheet download datasheet NCP1246 Datasheet

Full PDF Text Transcription for NCP1246 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for NCP1246. For precise diagrams, and layout, please refer to the original PDF.

NCP1246 Product Preview Fixed Frequency Current Mode Controller for Flyback Converters The NCP1246 is a new fixedïfrequency currentïmode controller featuring the Dynamic ...

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s a new fixedïfrequency currentïmode controller featuring the Dynamic SelfïSupply. 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 startïup, transients, latch, standïby 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 brownïout detection as well. It features a timerïbased fault detection that ensures the detection of overload and an adjustable compensation to help keep the maxi

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