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WS3255 - High Precision Primary-Side Off-line PWM Power Switch

General Description

High Precision Primary-Side Off-line PWM Power Switch

Key Features

  • 5uA ultra-low startup current.
  • 2mA Low operating current.
  • ±5% Constant Voltage Regulation at Universal AC input.
  • Primary-side Sensing and Regulation Without TL431 and Opto-coupler.
  • Programmable CV and CC Regulation.
  • Built-in Primary winding inductance compensation.
  • Programmable cable drop compensation.
  • Built-in soft start.
  • Built-in Leading-edge blanking.
  • Cycle by cycle over current protection (OCP).
  • VCC over voltage clamp & under voltage lo.

📥 Download Datasheet

Datasheet Details

Part number WS3255
Manufacturer WINSEMI
File Size 227.95 KB
Description High Precision Primary-Side Off-line PWM Power Switch
Datasheet download datasheet WS3255 Datasheet

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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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WS3255 Product Description High Precision Primary-Side Off-line PWM Power Switch Features � 5uA ultra-low startup current � 2mA Low operating current � ±5% Constant Voltage Regulation at Universal AC input � Primary-side Sensing and Regulation Without TL431 and Opto-coupler � Programmable CV and CC Regulation � Built-in Primary winding inductance compensation � Programmable cable drop compensation � Built-in soft start � Built-in Leading-edge blanking � Cycle by cycle over current protection (OCP) � VCC over voltage clamp & under voltage lockout( UVLO) � Maximum Gate output voltage clamped at 12V � Frequency jittering � Ultra low standby power (<100mW) WS3255 operates in primary-side sensing and regulation. Consequently, optocoupler and TL431 could be eliminated, thus reduce the cost.