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NCP1205 - Single Ended PWM Controller

General Description

Pin No.

Key Features

  • Natural Drain Valley Switching for Lower EMI and Quasi--Resonant Operation (QR).
  • Smooth Frequency Foldback for Low Standby and Minimum Ripple at Light--Load.
  • Adjustable Maximum Switching Frequency.
  • Internal 200 ns Leading Edge Blanking on Current Sense.
  • 250 mA Sink and Source Driver.
  • Wide Operating Voltages: 8.0 to 30 V.
  • Wide UVLO Levels: 7.2 to 15 V Typical.
  • Auto--Recovery Internal Short--Circuit Protection (OCP).
  • Integrated 3.0 mA Typ Startup Sourc.

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Datasheet Details

Part number NCP1205
Manufacturer onsemi
File Size 338.54 KB
Description Single Ended PWM Controller
Datasheet download datasheet NCP1205 Datasheet

Full PDF Text Transcription for NCP1205 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for NCP1205. For precise diagrams, and layout, please refer to the original PDF.

NCP1205 Single Ended PWM Controller Featuring QR Operation and Soft Frequency Foldback The NCP1205 combines a true Current Mode Control modulator and a demagnetization de...

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ombines a true Current Mode Control modulator and a demagnetization detector to ensure full Discontinuous Conduction Mode in any load/line conditions and minimum drain voltage switching (Quasi--Resonant operation, also called critical conduction operation). With its inherent Variable Frequency Mode (VFM), the controller decreases its operating frequency at constant peak current whenever the output power demand diminishes. Associated with automatic multiple valley switching, this unique architecture guarantees minimum switching losses and the lowest power drawn from the mains when operating at no--load conditions.

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