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DK912 - High Precision CC/CV Primary-Side Converter

General Description

The DK912 is a primary side flyback type AC-DC Switch Mode Power Controlling IC.

It integrates 700V high voltage power transistor and primary side peak current detecting circuit.

Key Features

  • Build-in 700V high voltage power transistor.
  • 85V.
  • 265V AC universal input range allows worldwide operation.
  • Integrated high voltage constant current starting circuit, no need for additional starting resistance.
  • Patent Primary Side Regulation control to simplify the circuit.
  • Patent self-power supply circuit design, no need for auxiliary winding in transformer.
  • Internal PMW oscillation circuit with Frequency jittering control to keep EMC characteristics.

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Other Datasheets by Dongke Semiconductor

Part Number Description
DK913 12W primary-side feedback AC-DC conversion chip
DK903 3W primary-side feedback AC-DC conversion
DK905 5W Primary-Side Feedback AC/DC Conversion
DK906 6W primary-side feedback AC-DC conversion
DK935 High Precision CC/CV Primary-Side Converter

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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SHENZHEN DONGKE SEMICONDUCTOR CO., LTD PSR CONSTANT CURRENT / VOLTAGE IC-DK912 SPECIFICATION UU 1. DESCRIPTION The DK912 is a primary side flyback type AC-DC Switch Mode Power Controlling IC. It integrates 700V high voltage power transistor and primary side peak current detecting circuit. It also includes Primary Side Constant Current Regulation, Constant Voltage Control, Self-Power supply circuit and Output cable compensation functions. Because of its highly integrated CMOS circuit design, lots of external components are saved, transformer design is simple, only two windings are needed in transformer for isolated circuit designs. 2.